updated dependencies

feat(init): included enviroment variable and working directory
test(cron): wip

.devcontainer/devcontainer.json

@@ -1,10 +1,25 @@
 {
   "name": "Golang Dev",
-  "image": "golang-dev:1.21-bookworm-user",
+  "image": "golang-dev:1.22-bookworm-user",
+  "mounts": [
+    {
+      "source": "WingmateGoPath",
+      "target": "/go",
+      "type": "volume"
+    },
+    {
+      "source": "WingmateGolangDevHome",
+      "target": "/home/golang",
+      "type": "volume"
+    }
+  ],
   "customizations": {
     "vscode": {
       "extensions": [
-        "golang.go"
+        "golang.go",
+        "ms-azuretools.vscode-docker",
+        "ms-vscode.makefile-tools",
+        "ms-vscode.cpptools-extension-pack"
       ]
     }
   }

.gitignore

@@ -1,2 +1,6 @@
-/.idea
+/cmd/wingmate/wingmate
-/wingmate
+/cmd/wingmate/version.txt
+/cmd/pidproxy/pidproxy
+/cmd/pidproxy/version.txt
+/cmd/exec/exec
+/cmd/exec/version.txt

.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/wingmate.iml" filepath="$PROJECT_DIR$/.idea/wingmate.iml" />
+    </modules>
+  </component>
+</project>

.idea/remote-targets.xml

@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteTargetsManager">
+    <targets>
+      <target name="golang-dev:1.21-bookworm-user" type="docker" uuid="5b79636b-3db9-4e2a-9fd3-03277653ae58">
+        <config>
+          <option name="targetPlatform">
+            <TargetPlatform />
+          </option>
+          <option name="buildImageConfig">
+            <BuildImageConfig>
+              <option name="dockerFile" value="docker/bookworm/Dockerfile" />
+            </BuildImageConfig>
+          </option>
+          <option name="buildNotPull" value="false" />
+          <option name="containerConfig">
+            <ContainerConfig>
+              <option name="runCliOptions" value="-u &quot;1000:1000&quot; --rm" />
+            </ContainerConfig>
+          </option>
+          <option name="pullImageConfig">
+            <PullImageConfig>
+              <option name="tagToPull" value="golang-dev:1.21-bookworm-user" />
+            </PullImageConfig>
+          </option>
+        </config>
+        <ContributedStateBase type="GoLanguageRuntime">
+          <config>
+            <option name="compiledExecutablesVolume">
+              <VolumeState>
+                <option name="targetSpecificBits">
+                  <map>
+                    <entry key="mountAsVolume" value="false" />
+                  </map>
+                </option>
+              </VolumeState>
+            </option>
+            <option name="goPath" value="/go" />
+            <option name="goRoot" value="/usr/local/go/bin/go" />
+            <option name="goVersion" value="go1.21.5 linux/amd64" />
+            <option name="projectSourcesVolume">
+              <VolumeState>
+                <option name="targetSpecificBits">
+                  <map>
+                    <entry key="mountAsVolume" value="false" />
+                  </map>
+                </option>
+              </VolumeState>
+            </option>
+          </config>
+        </ContributedStateBase>
+      </target>
+    </targets>
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

.idea/wingmate.iml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="Go" enabled="true" />
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

.tool-versions

@@ -1 +0,0 @@
-golang 1.21.4

Makefile

@@ -0,0 +1,59 @@
+DESTDIR = /usr/local/bin
+
+installs = install-dir
+programs = wingmate pidproxy exec
+ifdef TEST_BUILD
+	programs += oneshot spawner starter dummy bg
+	installs += install-test
+endif
+
+all: ${programs}
+
+wingmate:
+	$(MAKE) -C cmd/wingmate all
+
+pidproxy:
+	$(MAKE) -C cmd/pidproxy all
+
+exec:
+	$(MAKE) -C cmd/exec all
+
+dummy:
+	$(MAKE) -C cmd/experiment/dummy all
+
+oneshot:
+	$(MAKE) -C cmd/experiment/oneshot all
+
+spawner:
+	$(MAKE) -C cmd/experiment/spawner all
+
+starter:
+	$(MAKE) -C cmd/experiment/starter all
+
+bg:
+	$(MAKE) -C cmd/experiment/bg all
+
+clean:
+	$(MAKE) -C cmd/wingmate clean
+	$(MAKE) -C cmd/pidproxy clean
+	$(MAKE) -C cmd/exec clean
+	$(MAKE) -C cmd/experiment/dummy clean
+	$(MAKE) -C cmd/experiment/oneshot clean
+	$(MAKE) -C cmd/experiment/spawner clean
+	$(MAKE) -C cmd/experiment/starter clean
+	$(MAKE) -C cmd/experiment/bg clean
+
+install: ${installs}
+	$(MAKE) -C cmd/wingmate DESTDIR=${DESTDIR} install
+	$(MAKE) -C cmd/pidproxy DESTDIR=${DESTDIR} install
+	$(MAKE) -C cmd/exec DESTDIR=${DESTDIR} install
+
+install-test:
+	$(MAKE) -C cmd/experiment/dummy DESTDIR=${DESTDIR} install
+	$(MAKE) -C cmd/experiment/oneshot DESTDIR=${DESTDIR} install
+	$(MAKE) -C cmd/experiment/spawner DESTDIR=${DESTDIR} install
+	$(MAKE) -C cmd/experiment/starter DESTDIR=${DESTDIR} install
+	$(MAKE) -C cmd/experiment/bg DESTDIR=${DESTDIR} install
+
+install-dir:
+	install -d ${DESTDIR}

README.md

@@ -1,2 +1,157 @@
 # wingmate
 
+Wingmate is a process manager for services. It works like init. It starts and restarts services.
+It also has cron feature. It is designed to run in a container/docker. 
+The Wingmate binary do not need any external dependency. 
+Just copy the binary, and exec from the entry point script.
+
+# Getting Started
+
+## Binaries
+
+There are three binaries in this project: `wingmate`, `wmpidproxy`, and `wmexec`.
+
+`wingmate` is the core binary. It reads config, starts, restarts services. It also
+runs cron. Read the [configuration](#configuration) section for files needed to run
+`wingmate`.
+
+`wmpidproxy` is a helper binary for monitoring _legacy style_ service (fork, exit
+initial proces, and continue in background). Read [here](#wingmate-pid-proxy-binary)
+for further details about `wmpidproxy`.
+
+`wmexec` is a helper binary for running process in different `user` or `group`.
+It also useful for setting the process as process group leader.
+Read [here](#wingmate-exec-binary) for further details about `wmexec`.
+
+## Building a container image based on wingmate image in Docker Hub
+
+Wingmate has no dependency other than `alpine` base image, so you just need to copy
+the binaries directly. If you have built your application into an `alpine` based image,
+all you need to do is copy whichever binary you need, crontab file (if you use cron)
+and add some shell script to glue them together. Here is a Dockerfile example.
+
+```Dockerfile
+# Dockerfile
+FROM suyono/wingmate:alpine as source
+
+FROM alpine:latest
+ADD --chmod=755 wingmate/ /etc/wingmate/
+ADD --chmod=755 entry.sh /usr/local/bin/entry.sh
+COPY --from=source /usr/local/bin/wingmate /usr/local/bin/wingmate
+COPY --from=source /usr/local/bin/wmpidproxy /usr/local/bin/wmpidproxy
+COPY --from=source /usr/local/bin/wmexec /usr/local/bin/wmexec
+ENTRYPOINT [ "/usr/local/bin/entry.sh" ]
+CMD [ "/usr/local/bin/wingmate" ]
+```
+You can find some examples for shell script in [alpine docker](docker/alpine) and 
+[bookworm docker](docker/bookworm).
+
+## Configuration
+
+When `wingmate` binary starts, it will look for some files. By default, it will
+try to read the content of `/etc/wingmate` directory. You can change the directory
+where it reads by setting `WINGMATE_CONFIG_PATH` environment variable. Wingmate supports 
+two format of configurations: yaml and shell script.
+
+### YAML configuration
+
+File structure:
+```shell
+/etc
+ └── wingmate
+     └── wingmate.yaml
+```
+Wingmate will parse the `wingmate.yaml` file and start services and crones based on the content
+of the yaml file. Please read [wingmate.yaml.md](wingmate.yaml.md) for details on
+the structure of yaml configuration file and some examples.
+
+### Shell script configuration
+
+Files and directories structure:
+```shell
+/etc
+ └── wingmate
+     ├── crontab
+     ├── crontab.d
+     │   ├── cron1.sh
+     │   ├── cron2.sh
+     │   └── cron3.sh
+     └── service
+         ├── one.sh
+         └── spawner.sh
+```
+
+First, `wingmate` will try to read the content of `service` directory. The content of
+this directory should be executables (either shell scripts or binaries). The wingmate
+will run every executable in `service` directory without going into any subdirectory.
+
+Next, `wingmate` will read the `crontab` file. `wingmate` expects the `crontab` file using
+common UNIX crontab file format. Something like this
+
+```shell
+ ┌───────────── minute (0–59)
+ │ ┌───────────── hour (0–23)
+ │ │ ┌───────────── day of the month (1–31)
+ │ │ │ ┌───────────── month (1–12)
+ │ │ │ │ ┌───────────── day of the week (0–6) (Sunday to Saturday)
+ │ │ │ │ │ 
+ │ │ │ │ │
+ │ │ │ │ │
+ * * * * * <commad or shell script or binary>
+```
+
+The command part only support simple command and arguments. Shell expression is not supported.
+It is recommended to write a shell script and put the path to shell script in
+the command part.
+
+**Note: It is recommended to use the yaml format instead of shell script. In order to avoid less
+obvious mistake when writing shell script.**
+
+# Appendix
+## Wingmate PID Proxy binary
+
+`wingmate` works by monitoring its direct children process. When it sees one of its children
+exited, it will start the child process again.
+
+Sometimes you find some services work by running in the background. It means it forks a new 
+process, disconnect the new child from terminal, exit the parent process, and continue 
+running in the child process. This kind of service usually write its background process
+PID in a pid file.
+
+To monitor the background services, `wingmate` utilizes `wmpidproxy`. `wmpidproxy` runs
+in foreground in-place of the background service. It also periodically check whether the
+background service is still running, in current implementation it checks every second.
+
+```shell
+wmpidproxy --pid-file <path to pid file> -- <background service binary/start script>
+```
+#### Example
+Running sshd background with `wingmate` and `wmpidproxy`: [here](example/ssh-docker)
+
+#### Note
+
+It is recommended to configure services to run in foreground if they support it. When services
+running in foreground, they are running as direct children process of `wingmate`.
+`wingmate` monitors children process effectively. Whenever a child process exited/terminated,
+`wingmate` will start it again quickly. Running in foreground also removes the overhead of running
+`wmpidproxy` together with the service.
+
+## Wingmate Exec binary
+
+`wingmate` runs all the services as its children using the same `uid`, `gid`, and in the
+same process group. You can use `wmexec` to run service in different `uid`, `gid`, or make
+the service process as its own process group leader.
+
+#### Syntax
+
+```shell
+wmexec [--user <uid>[:<gid>]] [--setsid] -- <target executable>
+```
+| Option   | Parameter | Description                                                                                              |
+|----------|-----------|----------------------------------------------------------------------------------------------------------|
+| --user   | uid[:gid] | Set the real user ID and the real group id. Uid and Gid can be either in numeric form or in name form    |
+| --setsid |           | Set the process become the leader of its own process group, effectively detaching from parent's terminal |
+
+#### Example
+
+You can find example for `wmexec` in [here](docker/alpine/etc/wingmate) and [here](docker/bookworm/etc/wingmate)

cmd/cli/splitargs.go

@@ -0,0 +1,37 @@
+package cli
+
+import (
+	"errors"
+)
+
+func SplitArgs(args []string) ([]string, []string, error) {
+	var (
+		i         int
+		arg       string
+		selfArgs  []string
+		childArgs []string
+	)
+	found := false
+	for i, arg = range args {
+		if arg == "--" {
+			found = true
+			if i+1 == len(args) {
+				return nil, nil, errors.New("invalid argument")
+			}
+
+			if len(args[i+1:]) == 0 {
+				return nil, nil, errors.New("invalid argument")
+			}
+
+			selfArgs = args[:i]
+			childArgs = args[i+1:]
+			break
+		}
+	}
+
+	if !found {
+		return nil, nil, errors.New("invalid argument")
+	}
+	return selfArgs, childArgs, nil
+
+}

cmd/cli/splitargs_test.go

@@ -0,0 +1,7 @@
+package cli
+
+import "testing"
+
+func TestSplitArgs(t *testing.T) {
+	SplitArgs([]string{"wmexec", "--user", "1200", "--", "wmspawner"})
+}

cmd/cli/version.go

@@ -0,0 +1,45 @@
+package cli
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
+	"github.com/spf13/viper"
+)
+
+type Version string
+
+const versionFlag = "version"
+
+func (v Version) Print() {
+	fmt.Print(v)
+	os.Exit(0)
+}
+
+func (v Version) Cmd(cmd *cobra.Command) {
+	cmd.AddCommand(&cobra.Command{
+		Use: "version",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			v.Print()
+			return nil
+		},
+	})
+}
+
+func (v Version) Flag(cmd *cobra.Command) {
+	v.FlagSet(cmd.PersistentFlags())
+}
+
+func (v Version) FlagSet(fs *pflag.FlagSet) {
+	viper.SetDefault(versionFlag, false)
+	fs.Bool(versionFlag, false, "print version")
+	_ = viper.BindPFlag(versionFlag, fs.Lookup(versionFlag))
+}
+
+func (v Version) FlagHook() {
+	if viper.GetBool(versionFlag) {
+		v.Print()
+	}
+}

cmd/exec/Makefile

@@ -0,0 +1,10 @@
+all:
+	git describe > version.txt
+	go build -v
+
+clean:
+	echo "dev" > version.txt
+	go clean -i -cache -testcache
+
+install:
+	install exec ${DESTDIR}/wmexec

cmd/exec/ent.go

@@ -0,0 +1,11 @@
+//go:build !(cgo && linux)
+
+package main
+
+func getUid(user string) (uint64, error) {
+	panic("not implemented")
+}
+
+func getGid(group string) (uint64, error) {
+	panic("not implemented")
+}

cmd/exec/ent_lin.go

@@ -0,0 +1,51 @@
+//go:build cgo && linux
+
+package main
+
+/*
+#include<errno.h>
+#include<string.h>
+#include<sys/types.h>
+#include<pwd.h>
+#include<grp.h>
+
+static uid_t getuid(const char* username) {
+	struct passwd local, *rv;
+	errno = 0;
+	rv = getpwnam(username);
+	if (errno != 0) {
+		return 0;
+	}
+
+	memcpy(&local, rv, sizeof(struct passwd));
+	return local.pw_uid;
+}
+static gid_t getgid(const char* groupname) {
+	struct group local, *rv;
+	errno = 0;
+	rv = getgrnam(groupname);
+	if (errno != 0) {
+		return 0;
+	}
+
+	memcpy(&local, rv, sizeof(struct group));
+	return local.gr_gid;
+}
+*/
+import "C"
+
+func getUid(user string) (uint64, error) {
+	u, err := C.getuid(C.CString(user))
+	if err != nil {
+		return 0, err
+	}
+	return uint64(u), nil
+}
+
+func getGid(group string) (uint64, error) {
+	g, err := C.getgid(C.CString(group))
+	if err != nil {
+		return 0, err
+	}
+	return uint64(g), nil
+}

cmd/exec/exec.go

@@ -0,0 +1,142 @@
+package main
+
+import (
+	_ "embed"
+	"errors"
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+	"strconv"
+	"strings"
+
+	"gitea.suyono.dev/suyono/wingmate"
+	"gitea.suyono.dev/suyono/wingmate/cmd/cli"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+	"golang.org/x/sys/unix"
+)
+
+type execApp struct {
+	childArgs []string
+	err       error
+	version   cli.Version
+}
+
+const (
+	setsidFlag = "setsid"
+	EnvSetsid  = "SETSID"
+	userFlag   = "user"
+	EnvUser    = "USER"
+)
+
+var (
+
+	//go:embed version.txt
+	version string
+)
+
+func main() {
+	var (
+		selfArgs  []string
+		childArgs []string
+		app       *execApp
+		rootCmd   *cobra.Command
+		err       error
+	)
+
+	app = &execApp{
+		version: cli.Version(version),
+	}
+
+	rootCmd = &cobra.Command{
+		Use:          "wmexec",
+		SilenceUsage: true,
+		RunE:         app.execCmd,
+	}
+
+	rootCmd.PersistentFlags().BoolP(setsidFlag, "s", false, "set to true to run setsid() before exec")
+	_ = viper.BindPFlag(EnvSetsid, rootCmd.PersistentFlags().Lookup(setsidFlag))
+
+	rootCmd.PersistentFlags().StringP(userFlag, "u", "", "\"user:[group]\"")
+	_ = viper.BindPFlag(EnvUser, rootCmd.PersistentFlags().Lookup(userFlag))
+
+	app.version.Flag(rootCmd)
+
+	viper.SetEnvPrefix(wingmate.EnvPrefix)
+	_ = viper.BindEnv(EnvUser)
+	_ = viper.BindEnv(EnvSetsid)
+	viper.SetDefault(EnvSetsid, false)
+	viper.SetDefault(EnvUser, "")
+
+	app.version.Cmd(rootCmd)
+
+	if selfArgs, childArgs, err = cli.SplitArgs(os.Args); err != nil {
+		selfArgs = os.Args
+	}
+	app.childArgs = childArgs
+	app.err = err
+
+	rootCmd.SetArgs(selfArgs[1:])
+	if err := rootCmd.Execute(); err != nil {
+		log.Println(err)
+		os.Exit(1)
+	}
+}
+
+func (e *execApp) execCmd(_ *cobra.Command, _ []string) error {
+	e.version.FlagHook()
+
+	if e.err != nil {
+		return e.err
+	}
+
+	if viper.GetBool(EnvSetsid) {
+		_, _ = unix.Setsid()
+	}
+
+	var (
+		uid  uint64
+		gid  uint64
+		err  error
+		path string
+	)
+
+	ug := viper.GetString(EnvUser)
+	if len(ug) > 0 {
+		user, group, ok := strings.Cut(ug, ":")
+		if ok {
+			if gid, err = strconv.ParseUint(group, 10, 32); err != nil {
+				if gid, err = getGid(group); err != nil {
+					return fmt.Errorf("cgo getgid: %w", err)
+				}
+			}
+			if err = unix.Setgid(int(gid)); err != nil {
+				return fmt.Errorf("setgid: %w", err)
+			}
+		}
+
+		uid, err = strconv.ParseUint(user, 10, 32)
+		if err != nil {
+			if uid, err = getUid(user); err != nil {
+				return fmt.Errorf("cgo getuid: %w", err)
+			}
+		}
+		if err = unix.Setuid(int(uid)); err != nil {
+			return fmt.Errorf("setuid: %w", err)
+		}
+
+	}
+
+	if path, err = exec.LookPath(e.childArgs[0]); err != nil {
+		if !errors.Is(err, exec.ErrDot) {
+			return fmt.Errorf("lookpath: %w", err)
+		}
+	}
+
+	if err = unix.Exec(path, e.childArgs, os.Environ()); err != nil {
+		return fmt.Errorf("exec: %w", err)
+	}
+
+	return nil
+}

cmd/experiment/.gitignore

@@ -0,0 +1,10 @@
+/dummy/dummy
+/dummy/version.txt
+/starter/starter
+/starter/version.txt
+/oneshot/oneshot
+/oneshot/version.txt
+/spawner/spawner
+/spawner/version.txt
+/bg/bg
+/bg/version.txt

cmd/experiment/bg/Makefile

@@ -0,0 +1,10 @@
+all:
+	git describe > version.txt
+	go build -v
+
+clean:
+	echo "dev" > version.txt
+	go clean -i -cache -testcache
+
+install:
+	install bg ${DESTDIR}/wmbg

cmd/experiment/bg/background.go

@@ -0,0 +1,67 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"time"
+
+	"github.com/spf13/pflag"
+	"golang.org/x/sys/unix"
+)
+
+const (
+	logPathFlag = "log-path"
+	pidFileFlag = "pid-file"
+)
+
+func main() {
+	var (
+		logPath     string
+		pidFilePath string
+		name        string
+		pause       uint
+		lf          *os.File
+		err         error
+	)
+
+	pflag.StringVarP(&logPath, logPathFlag, "l", "/var/log/wmbg.log", "log file path")
+	pflag.StringVarP(&pidFilePath, pidFileFlag, "p", "/var/run/wmbg.pid", "pid file path")
+	pflag.StringVar(&name, "name", "no-name", "process name")
+	pflag.UintVar(&pause, "pause", 5, "pause interval")
+	pflag.Parse()
+
+	if lf, err = os.OpenFile(logPath, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0644); err != nil {
+		os.Exit(2)
+	}
+	defer func() {
+		_ = lf.Close()
+	}()
+
+	log.SetOutput(lf)
+	log.Printf("starting process %s with pause interval %d", name, pause)
+	if err = writePid(pidFilePath); err != nil {
+		log.Printf("failed to write pid file: %+v", err)
+	}
+	time.Sleep(time.Duration(pause) * time.Second)
+	log.Printf("process %s finished", name)
+}
+
+func writePid(path string) error {
+	var (
+		err error
+		pf  *os.File
+	)
+
+	if pf, err = os.OpenFile(path, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0644); err != nil {
+		return fmt.Errorf("opening pid file for write: %w", err)
+	}
+	defer func() {
+		_ = pf.Close()
+	}()
+
+	if _, err = fmt.Fprintf(pf, "%d", unix.Getpid()); err != nil {
+		return fmt.Errorf("writing pid to the pid file: %w", err)
+	}
+	return nil
+}

cmd/experiment/dummy/Makefile

@@ -0,0 +1,10 @@
+all:
+	git describe > version.txt
+	go build -v
+
+clean:
+	echo "dev" > version.txt
+	go clean -i -cache -testcache
+
+install:
+	install dummy ${DESTDIR}/wmdummy

cmd/experiment/dummy/dummy.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"time"
+)
+
+func main() {
+	log.Println("using log.Println")
+	fmt.Println("using fmt.Println")
+
+	time.Sleep(time.Second * 5)
+
+	log.Println("log: finishing up")
+	fmt.Println("fmt: finishing up")
+}

cmd/experiment/oneshot/Makefile

@@ -0,0 +1,10 @@
+all:
+	git describe > version.txt
+	go build -v
+
+clean:
+	echo "dev" > version.txt
+	go clean -i -cache -testcache
+
+install:
+	install oneshot ${DESTDIR}/wmoneshot

cmd/experiment/oneshot/oneshot.go

@@ -0,0 +1,79 @@
+package main
+
+import (
+	"log"
+	"math/rand"
+	"os"
+	"os/exec"
+
+	"gitea.suyono.dev/suyono/wingmate"
+	"gitea.suyono.dev/suyono/wingmate/cmd/cli"
+	"github.com/spf13/viper"
+)
+
+const (
+	EnvLog               = "LOG"
+	EnvLogMessage        = "LOG_MESSAGE"
+	EnvDefaultLogMessage = "oneshot executed"
+	EnvInstanceNum       = "INSTANCE_NUM"
+	EnvDefaultInstances  = 0
+)
+
+func main() {
+	viper.SetEnvPrefix(wingmate.EnvPrefix)
+	viper.BindEnv(EnvLog)
+	viper.BindEnv(EnvLogMessage)
+	viper.BindEnv(EnvInstanceNum)
+	viper.SetDefault(EnvLogMessage, EnvDefaultLogMessage)
+	viper.SetDefault(EnvInstanceNum, EnvDefaultInstances)
+
+	_, childArgs, err := cli.SplitArgs(os.Args)
+	if err != nil {
+		log.Printf("splitargs: %+v", err)
+		os.Exit(2)
+	}
+
+	logPath := viper.GetString(EnvLog)
+	logMessage := viper.GetString(EnvLogMessage)
+	log.Println("log path:", logPath)
+	if logPath != "" {
+		var (
+			file *os.File
+		)
+
+		if file, err = os.OpenFile(logPath, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0o666); err == nil {
+			defer func() {
+				_ = file.Close()
+			}()
+
+			if err = wingmate.NewLog(file); err == nil {
+				wingmate.Log().Info().Msg(logMessage)
+			}
+		}
+	}
+
+	if len(childArgs) > 0 {
+		StartInstances(childArgs[0], childArgs[1:]...)
+	}
+}
+
+func StartInstances(exePath string, args ...string) {
+	num := (rand.Uint32() % 16) + 16
+
+	iNum := viper.GetInt(EnvInstanceNum)
+	if iNum > 0 {
+		num = uint32(iNum)
+	}
+
+	var (
+		ctr uint32
+		cmd *exec.Cmd
+		err error
+	)
+	for ctr = 0; ctr < num; ctr++ {
+		cmd = exec.Command(exePath, args...)
+		if err = cmd.Start(); err != nil {
+			log.Printf("failed to run %s: %+v\n", exePath, err)
+		}
+	}
+}

cmd/experiment/spawner/Makefile

@@ -0,0 +1,10 @@
+all:
+	git describe > version.txt
+	go build -v
+
+clean:
+	echo "dev" > version.txt
+	go clean -i -cache -testcache
+
+install:
+	install spawner ${DESTDIR}/wmspawner

cmd/experiment/spawner/spawner.go

@@ -0,0 +1,40 @@
+package main
+
+import (
+	"log"
+	"os/exec"
+	"time"
+
+	"gitea.suyono.dev/suyono/wingmate"
+	"github.com/spf13/viper"
+)
+
+const (
+	EnvOneShotPath = "ONESHOT_PATH"
+	OneShotPath    = "/usr/local/bin/wmoneshot"
+)
+
+func main() {
+	var (
+		cmd *exec.Cmd
+		err error
+		t   *time.Ticker
+	)
+	viper.SetEnvPrefix(wingmate.EnvPrefix)
+	viper.BindEnv(EnvOneShotPath)
+	viper.SetDefault(EnvOneShotPath, OneShotPath)
+
+	exePath := viper.GetString(EnvOneShotPath)
+
+	t = time.NewTicker(time.Second * 5)
+	for {
+		cmd = exec.Command(exePath, "--", "wmdummy")
+		if err = cmd.Run(); err != nil {
+			log.Printf("failed to run %s: %+v\n", exePath, err)
+		} else {
+			log.Printf("%s executed\n", exePath)
+		}
+
+		<-t.C
+	}
+}

cmd/experiment/starter/Makefile

@@ -0,0 +1,10 @@
+all:
+	git describe > version.txt
+	go build -v
+
+clean:
+	echo "dev" > version.txt
+	go clean -i -cache -testcache
+
+install:
+	install starter ${DESTDIR}/wmstarter

cmd/experiment/starter/starter.go

@@ -0,0 +1,110 @@
+package main
+
+import (
+	"bufio"
+	"io"
+	"log"
+	"os"
+	"os/exec"
+	"sync"
+
+	"gitea.suyono.dev/suyono/wingmate"
+	"gitea.suyono.dev/suyono/wingmate/cmd/cli"
+	"github.com/spf13/pflag"
+	"github.com/spf13/viper"
+)
+
+const (
+	DummyPath    = "/usr/local/bin/wmdummy"
+	EnvDummyPath = "DUMMY_PATH"
+	NoWaitFlag   = "no-wait"
+)
+
+func main() {
+	var (
+		stdout    io.ReadCloser
+		stderr    io.ReadCloser
+		wg        *sync.WaitGroup
+		err       error
+		exePath   string
+		selfArgs  []string
+		childArgs []string
+		flagSet   *pflag.FlagSet
+		noWait    bool
+		cmd       *exec.Cmd
+	)
+	if selfArgs, childArgs, err = cli.SplitArgs(os.Args); err == nil {
+		flagSet = pflag.NewFlagSet(selfArgs[0], pflag.ExitOnError)
+		flagSet.Count(NoWaitFlag, "do not wait for the child process")
+		if err = flagSet.Parse(selfArgs[1:]); err != nil {
+			log.Printf("invalid argument: %+v", err)
+			return
+		}
+	} else {
+		flagSet = pflag.NewFlagSet(os.Args[0], pflag.ExitOnError)
+		flagSet.Count(NoWaitFlag, "do not wait for the child process")
+		if err = flagSet.Parse(os.Args[1:]); err != nil {
+			log.Printf("invalid argument: %+v", err)
+			return
+		}
+	}
+	_ = viper.BindPFlag(NoWaitFlag, flagSet.Lookup(NoWaitFlag))
+	if viper.GetInt(NoWaitFlag) > 0 {
+		noWait = true
+	}
+
+	viper.SetEnvPrefix(wingmate.EnvPrefix)
+	_ = viper.BindEnv(EnvDummyPath)
+	viper.SetDefault(EnvDummyPath, DummyPath)
+
+	exePath = viper.GetString(EnvDummyPath)
+
+	if len(childArgs) > 0 {
+		cmd = exec.Command(childArgs[0], childArgs[1:]...)
+	} else {
+		cmd = exec.Command(exePath)
+	}
+
+	if !noWait {
+		if stdout, err = cmd.StdoutPipe(); err != nil {
+			log.Panic(err)
+		}
+
+		if stderr, err = cmd.StderrPipe(); err != nil {
+			log.Panic(err)
+		}
+
+		wg = &sync.WaitGroup{}
+		wg.Add(2)
+		go pulley(wg, stdout, "stdout")
+		go pulley(wg, stderr, "stderr")
+	}
+
+	if err = cmd.Start(); err != nil {
+		log.Panic(err)
+	}
+
+	if !noWait {
+		wg.Wait()
+
+		if err = cmd.Wait(); err != nil {
+			log.Printf("got error when Waiting for child process: %#v\n", err)
+		}
+	}
+}
+
+func pulley(wg *sync.WaitGroup, src io.ReadCloser, srcName string) {
+	defer wg.Done()
+
+	scanner := bufio.NewScanner(src)
+	for scanner.Scan() {
+		log.Printf("coming out from %s: %s\n", srcName, scanner.Text())
+	}
+
+	if err := scanner.Err(); err != nil {
+		log.Printf("got error whean reading from %s: %#v\n", srcName, err)
+	}
+
+	log.Printf("closing %s...\n", srcName)
+	_ = src.Close()
+}

cmd/pidproxy/Makefile

@@ -0,0 +1,10 @@
+all:
+	git describe > version.txt
+	go build -v
+
+clean:
+	echo "dev" > version.txt
+	go clean -i -cache -testcache
+
+install:
+	install pidproxy ${DESTDIR}/wmpidproxy

cmd/pidproxy/pidproxy.go

@@ -0,0 +1,168 @@
+package main
+
+import (
+	"bufio"
+	"errors"
+	"gitea.suyono.dev/suyono/wingmate/cmd/cli"
+	"log"
+	"os"
+	"os/exec"
+	"os/signal"
+	"strconv"
+	"syscall"
+	"time"
+
+	"gitea.suyono.dev/suyono/wingmate"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+	"golang.org/x/sys/unix"
+
+	_ "embed"
+)
+
+type pidProxyApp struct {
+	childArgs []string
+	err       error
+	version   cli.Version
+}
+
+const (
+	pidFileFlag         = "pid-file"
+	EnvStartSecs        = "STARTSECS"
+	EnvDefaultStartSecs = 1
+)
+
+var (
+
+	//go:embed version.txt
+	version string
+)
+
+func main() {
+	var (
+		selfArgs  []string
+		childArgs []string
+		err       error
+		app       *pidProxyApp
+		rootCmd   *cobra.Command
+	)
+
+	app = &pidProxyApp{
+		version: cli.Version(version),
+	}
+
+	rootCmd = &cobra.Command{
+		Use:          "wmpidproxy",
+		SilenceUsage: true,
+		RunE:         app.pidProxy,
+	}
+
+	viper.SetEnvPrefix(wingmate.EnvPrefix)
+	_ = viper.BindEnv(EnvStartSecs)
+	viper.SetDefault(EnvStartSecs, EnvDefaultStartSecs)
+
+	rootCmd.PersistentFlags().StringP(pidFileFlag, "p", "", "location of pid file")
+	_ = rootCmd.MarkFlagRequired(pidFileFlag)
+	_ = viper.BindPFlag(pidFileFlag, rootCmd.PersistentFlags().Lookup(pidFileFlag))
+
+	app.version.Flag(rootCmd)
+	app.version.Cmd(rootCmd)
+
+	if selfArgs, childArgs, err = cli.SplitArgs(os.Args); err != nil {
+		selfArgs = os.Args
+	}
+	app.childArgs = childArgs
+	app.err = err
+
+	rootCmd.SetArgs(selfArgs[1:])
+	if err := rootCmd.Execute(); err != nil {
+		log.Println(err)
+		os.Exit(1)
+	}
+}
+
+func (p *pidProxyApp) pidProxy(cmd *cobra.Command, args []string) error {
+	p.version.FlagHook()
+
+	pidfile := viper.GetString(pidFileFlag)
+	log.Printf("%s %v", pidfile, p.childArgs)
+	if len(p.childArgs) > 1 {
+		go p.startProcess(p.childArgs[0], p.childArgs[1:]...)
+	} else {
+		go p.startProcess(p.childArgs[0])
+	}
+	initialWait := viper.GetInt(EnvStartSecs)
+	time.Sleep(time.Second * time.Duration(initialWait))
+
+	var (
+		err error
+		pid int
+		sc  chan os.Signal
+		t   *time.Ticker
+	)
+
+	sc = make(chan os.Signal, 1)
+	signal.Notify(sc, unix.SIGTERM)
+
+	t = time.NewTicker(time.Second)
+
+check:
+	for {
+		if pid, err = p.readPid(pidfile); err != nil {
+			return err
+		}
+
+		if err = unix.Kill(pid, syscall.Signal(0)); err != nil {
+			if !errors.Is(err, unix.ESRCH) {
+				return err
+			}
+			break check
+		}
+
+		select {
+		case <-t.C:
+		case <-sc:
+			if pid, err = p.readPid(pidfile); err != nil {
+				return err
+			}
+
+			if err = unix.Kill(pid, unix.SIGTERM); err != nil {
+				return err
+			}
+			break check
+		}
+	}
+	return nil
+}
+
+func (p *pidProxyApp) readPid(pidFile string) (int, error) {
+	var (
+		file  *os.File
+		err   error
+		pid64 int64
+	)
+
+	if file, err = os.Open(pidFile); err != nil {
+		return 0, err
+	}
+	defer func() {
+		_ = file.Close()
+	}()
+
+	scanner := bufio.NewScanner(file)
+	if scanner.Scan() {
+		if pid64, err = strconv.ParseInt(scanner.Text(), 10, 64); err != nil {
+			return 0, err
+		}
+		return int(pid64), nil
+	} else {
+		return 0, errors.New("invalid scanner")
+	}
+}
+
+func (p *pidProxyApp) startProcess(arg0 string, args ...string) {
+	if err := exec.Command(arg0, args...).Run(); err != nil {
+		log.Println("exec:", err)
+		return
+	}
+}

cmd/wingmate/Makefile

@@ -0,0 +1,11 @@
+all:
+	git describe > version.txt
+	go build -v
+
+clean:
+	echo "dev" > version.txt
+	go clean -i -cache -testcache
+
+install:
+	install wingmate ${DESTDIR}/wingmate
+	

cmd/wingmate/bridge.go

@@ -1,60 +1,86 @@
 package main
 
 import (
-	"time"
+	"sync"
 
 	"gitea.suyono.dev/suyono/wingmate/config"
 	wminit "gitea.suyono.dev/suyono/wingmate/init"
+	"gitea.suyono.dev/suyono/wingmate/task"
 )
 
-type wPath struct {
-	path string
-}
-
-func (p wPath) Path() string {
-	return p.path
-}
-
 type wConfig struct {
-	services []wminit.Path
+	tasks    *task.Tasks
-	cron     []wminit.Cron
+	config   *config.Config
+	viperMtx *sync.Mutex
 }
 
-func (c wConfig) Services() []wminit.Path {
+func (c *wConfig) Tasks() wminit.Tasks {
-	return c.services
+	return c.tasks
 }
 
-func (c wConfig) Cron() []wminit.Cron {
+func (c *wConfig) Reload() error {
-	return c.cron
+	//NOTE: for future use when reloading is possible
+	return nil
 }
 
-type wCron struct {
+func convert(cfg *config.Config) *wConfig {
-	iCron *config.Cron
+	retval := &wConfig{
+		tasks:    task.NewTasks(),
+		config:   cfg,
+		viperMtx: &sync.Mutex{},
 	}
 
-func (c wCron) TimeToRun(now time.Time) bool {
+	for _, s := range cfg.Service {
-	return c.iCron.TimeToRun(now)
+		st := task.NewServiceTask(s.Name).SetCommand(s.Command...).SetEnv(s.Environ...)
+		st.SetFlagSetsid(s.Setsid).SetWorkingDir(s.WorkingDir)
+		st.SetUser(s.User).SetGroup(s.Group).SetStartSecs(s.StartSecs).SetPidFile(s.PidFile)
+		st.SetConfig(cfg)
+		retval.tasks.AddService(st)
 	}
 
-func (c wCron) Command() wminit.Path {
+	for _, s := range cfg.ServiceV0 {
-	return wPath{
+		retval.tasks.AddV0Service(s)
-		path: c.iCron.Command(),
-	}
 	}
 
-func convert(cfg *config.Config) wConfig {
+	var schedule task.CronSchedule
-	retval := wConfig{
+	for _, c := range cfg.CronV0 {
-		services: make([]wminit.Path, 0, len(cfg.ServicePaths)),
+		schedule = configToTaskCronSchedule(c.CronSchedule)
-		cron:     make([]wminit.Cron, 0, len(cfg.Cron)),
+		retval.tasks.AddV0Cron(schedule, c.Command)
-	}
-
-	for _, s := range cfg.ServicePaths {
-		retval.services = append(retval.services, wPath{path: s})
 	}
 
 	for _, c := range cfg.Cron {
-		retval.cron = append(retval.cron, wCron{iCron: c})
+		schedule = configToTaskCronSchedule(c.CronSchedule)
+
+		ct := task.NewCronTask(c.Name).SetCommand(c.Command...).SetEnv(c.Environ...)
+		ct.SetFlagSetsid(c.Setsid).SetWorkingDir(c.WorkingDir).SetUser(c.User).SetGroup(c.Group)
+		ct.SetSchedule(c.Schedule, schedule)
+		ct.SetConfig(cfg)
+
+		retval.tasks.AddCron(ct)
 	}
 
 	return retval
 }
+
+func configToTaskCronSchedule(cfgSchedule config.CronSchedule) (taskSchedule task.CronSchedule) {
+	taskSchedule.Minute = configToTaskCronTimeSpec(cfgSchedule.Minute)
+	taskSchedule.Hour = configToTaskCronTimeSpec(cfgSchedule.Hour)
+	taskSchedule.DoM = configToTaskCronTimeSpec(cfgSchedule.DoM)
+	taskSchedule.Month = configToTaskCronTimeSpec(cfgSchedule.Month)
+	taskSchedule.DoW = configToTaskCronTimeSpec(cfgSchedule.DoW)
+
+	return
+}
+
+func configToTaskCronTimeSpec(cfg config.CronTimeSpec) task.CronTimeSpec {
+	switch v := cfg.(type) {
+	case *config.SpecAny:
+		return task.NewCronAnySpec()
+	case *config.SpecExact:
+		return task.NewCronExactSpec(v.Value())
+	case *config.SpecMultiOccurrence:
+		return task.NewCronMultiOccurrenceSpec(v.Values()...)
+	}
+
+	panic("invalid conversion")
+}

cmd/wingmate/wingmate.go

@@ -1,11 +1,18 @@
 package main
 
 import (
+	_ "embed"
 	"os"
 
 	"gitea.suyono.dev/suyono/wingmate"
 	"gitea.suyono.dev/suyono/wingmate/config"
 	wminit "gitea.suyono.dev/suyono/wingmate/init"
+	"github.com/spf13/viper"
+)
+
+var (
+	//go:embed version.txt
+	version string
 )
 
 func main() {
@@ -15,8 +22,13 @@ func main() {
 	)
 
 	_ = wingmate.NewLog(os.Stderr)
+	config.SetVersion(version)
+	config.ParseFlags()
+
+	wingmate.Log().Info().Msgf("starting wingmate version %s", viper.GetString(config.WingmateVersion))
+
 	if cfg, err = config.Read(); err != nil {
-		wingmate.Log().Error().Msgf("failed to read config %#v", err)
+		wingmate.Log().Fatal().Err(err).Msg("failed to read config")
 	}
 
 	initCfg := convert(cfg)

cmd/wingmate/wingmate_test.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"os"
+	"testing"
+)
+
+func TestEntry_configPathEnv(t *testing.T) {
+	_ = os.Setenv("WINGMATE_CONFIG_PATH", "/Volumes/Source/go/src/gitea.suyono.dev/suyono/wingmate/docker/bookworm/etc/wingmate")
+	defer func() {
+		_ = os.Unsetenv("WINGMATE_CONFIG_PATH")
+	}()
+	main()
+}
+
+func TestEntry_configPathPFlag(t *testing.T) {
+	os.Args = []string{"wingmate", "--config", "/workspaces/wingmate/docker/bookworm-newconfig/etc/wingmate"}
+	main()
+}
+
+func TestEntry(t *testing.T) {
+	main()
+}

config/config.go

@@ -2,30 +2,91 @@ package config
 
 import (
 	"errors"
+	"fmt"
 	"os"
 	"path/filepath"
+	"strings"
+	"sync"
 
 	"gitea.suyono.dev/suyono/wingmate"
 	"github.com/spf13/viper"
+	"golang.org/x/sys/unix"
 )
 
 const (
 	EnvPrefix                = "WINGMATE"
-	EnvConfigPath     = "CONFIG_PATH"
+	PathConfig               = "config_path"
 	DefaultConfigPath        = "/etc/wingmate"
 	ServiceDirName           = "service"
 	CrontabFileName          = "crontab"
+	WingmateConfigFileName   = "wingmate"
+	WingmateConfigFileFormat = "yaml"
+	WingmateVersion          = "APP_VERSION"
+	PidProxyPathConfig       = "pidproxy_path"
+	PidProxyPathDefault      = "wmpidproxy"
+	ExecPathConfig           = "exec_path"
+	ExecPathDefault          = "wmexec"
+	versionTrimRightCutSet   = "\r\n "
+	WMPidProxyPathFlag       = "pid-proxy"
+	WMExecPathFlag           = "exec"
+	PathConfigFlag           = "config"
 )
 
 type Config struct {
-	ServicePaths []string
+	ServiceV0 []string
-	Cron         []*Cron
+	CronV0    []*Cron
+	Service   []ServiceTask
+	Cron      []CronTask
+	viperMtx  *sync.Mutex
+}
+
+type Task struct {
+	Command    []string `mapstructure:"command"`
+	Environ    []string `mapstructure:"environ"`
+	Setsid     bool     `mapstructure:"setsid"`
+	User       string   `mapstructure:"user"`
+	Group      string   `mapstructure:"group"`
+	WorkingDir string   `mapstructure:"working_dir"`
+}
+
+type ServiceTask struct {
+	Task        `mapstructure:",squash"`
+	Name        string `mapstructure:"-"`
+	Background  bool   `mapstructure:"background"`
+	PidFile     string `mapstructure:"pidfile"`
+	StartSecs   uint   `mapstructure:"startsecs"`
+	AutoStart   bool   `mapstructure:"autostart"`
+	AutoRestart bool   `mapstructure:"autorestart"`
+}
+
+type CronTask struct {
+	CronSchedule `mapstructure:"-"`
+	Task         `mapstructure:",squash"`
+	Name         string `mapstructure:"-"`
+	Schedule     string `mapstructure:"schedule"`
+}
+
+type CronSchedule struct {
+	Minute CronTimeSpec
+	Hour   CronTimeSpec
+	DoM    CronTimeSpec
+	Month  CronTimeSpec
+	DoW    CronTimeSpec
+}
+
+func SetVersion(version string) {
+	version = strings.TrimRight(version, versionTrimRightCutSet)
+	viper.Set(WingmateVersion, version)
 }
 
 func Read() (*Config, error) {
 	viper.SetEnvPrefix(EnvPrefix)
-	viper.BindEnv(EnvConfigPath)
+	_ = viper.BindEnv(PathConfig)
-	viper.SetDefault(EnvConfigPath, DefaultConfigPath)
+	_ = viper.BindEnv(PidProxyPathConfig)
+	_ = viper.BindEnv(ExecPathConfig)
+	viper.SetDefault(PathConfig, DefaultConfigPath)
+	viper.SetDefault(PidProxyPathConfig, PidProxyPathDefault)
+	viper.SetDefault(ExecPathConfig, ExecPathDefault)
 
 	var (
 		dirent                  []os.DirEntry
@@ -33,43 +94,123 @@ func Read() (*Config, error) {
 		svcdir                  string
 		serviceAvailable        bool
 		cronAvailable           bool
+		wingmateConfigAvailable bool
 		cron                    []*Cron
 		crontabfile             string
+		services                []ServiceTask
+		crones                  []CronTask
 	)
 
 	serviceAvailable = false
 	cronAvailable = false
 	outConfig := &Config{
-		ServicePaths: make([]string, 0),
+		viperMtx:  &sync.Mutex{},
+		ServiceV0: make([]string, 0),
 	}
-	configPath := viper.GetString(EnvConfigPath)
+	configPath := viper.GetString(PathConfig)
 	svcdir = filepath.Join(configPath, ServiceDirName)
 	dirent, err = os.ReadDir(svcdir)
+	if err != nil {
+		wingmate.Log().Error().Msgf("encounter error when reading service directory %s: %+v", svcdir, err)
+	}
 	if len(dirent) > 0 {
 		for _, d := range dirent {
 			if d.Type().IsRegular() {
+				svcPath := filepath.Join(svcdir, d.Name())
+				if err = unix.Access(svcPath, unix.X_OK); err == nil {
 					serviceAvailable = true
-				outConfig.ServicePaths = append(outConfig.ServicePaths, filepath.Join(svcdir, d.Name()))
+					outConfig.ServiceV0 = append(outConfig.ServiceV0, svcPath)
+				} else {
+					wingmate.Log().Error().Msgf("checking executable access for %s: %+v", svcPath, err)
 				}
 			}
 		}
-	if err != nil {
-		wingmate.Log().Error().Msgf("encounter error when reading service directory %s: %#v", svcdir, err)
 	}
 
 	crontabfile = filepath.Join(configPath, CrontabFileName)
 	cron, err = readCrontab(crontabfile)
 	if len(cron) > 0 {
-		outConfig.Cron = cron
+		outConfig.CronV0 = cron
 		cronAvailable = true
 	}
 	if err != nil {
-		wingmate.Log().Error().Msgf("encounter error when reading crontab %s: %#v", crontabfile, err)
+		wingmate.Log().Error().Msgf("encounter error when reading crontab %s: %+v", crontabfile, err)
 	}
 
-	if !serviceAvailable && !cronAvailable {
+	wingmateConfigAvailable = false
+	if services, crones, err = readConfigYaml(configPath, WingmateConfigFileName, WingmateConfigFileFormat); err != nil {
+		wingmate.Log().Error().Msgf("encounter error when reading wingmate config file in %s/%s: %+v", configPath, WingmateConfigFileName, err)
+	}
+	if len(services) > 0 {
+		outConfig.Service = services
+		wingmateConfigAvailable = true
+	}
+	if len(crones) > 0 {
+		outConfig.Cron = crones
+		wingmateConfigAvailable = true
+	}
+
+	if !serviceAvailable && !cronAvailable && !wingmateConfigAvailable {
 		return nil, errors.New("no config found")
 	}
 
 	return outConfig, nil
 }
+
+func (c *Config) GetAppVersion() string {
+	c.viperMtx.Lock()
+	defer c.viperMtx.Unlock()
+
+	return viper.GetString(WingmateVersion)
+}
+
+func (c *Config) WMPidProxyPath() string {
+	c.viperMtx.Lock()
+	defer c.viperMtx.Unlock()
+
+	return viper.GetString(PidProxyPathConfig)
+}
+
+func (c *Config) WMPidProxyCheckVersion() error {
+	var (
+		binVersion string
+		appVersion string
+		err        error
+	)
+
+	if binVersion, err = getVersion(c.WMPidProxyPath()); err != nil {
+		return fmt.Errorf("get wmpidproxy version: %w", err)
+	}
+
+	appVersion = c.GetAppVersion()
+	if appVersion != binVersion {
+		return fmt.Errorf("wmpidproxy version mismatch")
+	}
+	return nil
+}
+
+func (c *Config) WMExecPath() string {
+	c.viperMtx.Lock()
+	defer c.viperMtx.Unlock()
+
+	return viper.GetString(ExecPathConfig)
+}
+
+func (c *Config) WMExecCheckVersion() error {
+	var (
+		binVersion string
+		appVersion string
+		err        error
+	)
+
+	if binVersion, err = getVersion(c.WMExecPath()); err != nil {
+		return fmt.Errorf("get wmexec version: %w", err)
+	}
+
+	appVersion = c.GetAppVersion()
+	if appVersion != binVersion {
+		return fmt.Errorf("wmexec version mismatch")
+	}
+
+	return nil
+}

config/config_test.go

@@ -0,0 +1,132 @@
+package config
+
+import (
+	"os"
+	"path"
+	"testing"
+
+	"gitea.suyono.dev/suyono/wingmate"
+	"github.com/spf13/viper"
+	"github.com/stretchr/testify/assert"
+)
+
+const (
+	serviceDir = "service"
+)
+
+var (
+	configDir string
+)
+
+func setup(t *testing.T) {
+	var err error
+	if configDir, err = os.MkdirTemp("", "wingmate-*-test"); err != nil {
+		t.Fatal("setup", err)
+	}
+	viper.Set(PathConfig, configDir)
+}
+
+func tear(t *testing.T) {
+	if err := os.RemoveAll(configDir); err != nil {
+		t.Fatal("tear", err)
+	}
+}
+
+func TestRead(t *testing.T) {
+
+	type testEntry struct {
+		name     string
+		testFunc func(t *testing.T)
+	}
+
+	mkSvcDir := func(t *testing.T) {
+		if err := os.MkdirAll(path.Join(configDir, serviceDir), 0755); err != nil {
+			t.Fatal("create dir", err)
+		}
+	}
+
+	touchFile := func(t *testing.T, name string, perm os.FileMode) {
+		f, err := os.OpenFile(name, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, perm)
+		if err != nil {
+			t.Fatal("create file", err)
+		}
+		_ = f.Close()
+	}
+
+	_ = wingmate.NewLog(os.Stderr)
+	tests := []testEntry{
+		{
+			name: "positive",
+			testFunc: func(t *testing.T) {
+				mkSvcDir(t)
+				touchFile(t, path.Join(configDir, serviceDir, "one.sh"), 0755)
+				touchFile(t, path.Join(configDir, serviceDir, "two.sh"), 0755)
+
+				cfg, err := Read()
+				assert.Nil(t, err)
+				assert.ElementsMatch(
+					t,
+					cfg.ServiceV0,
+					[]string{
+						path.Join(configDir, serviceDir, "one.sh"),
+						path.Join(configDir, serviceDir, "two.sh"),
+					},
+				)
+			},
+		},
+		{
+			name: "with directory",
+			testFunc: func(t *testing.T) {
+				const subdir1 = "subdir1"
+				mkSvcDir(t)
+				assert.Nil(t, os.Mkdir(path.Join(configDir, serviceDir, subdir1), 0755))
+				touchFile(t, path.Join(configDir, serviceDir, subdir1, "one.sh"), 0755)
+				touchFile(t, path.Join(configDir, serviceDir, "two.sh"), 0755)
+				cfg, err := Read()
+				assert.Nil(t, err)
+				assert.ElementsMatch(
+					t,
+					cfg.ServiceV0,
+					[]string{
+						path.Join(configDir, serviceDir, "two.sh"),
+					},
+				)
+			},
+		},
+		{
+			name: "wrong mode",
+			testFunc: func(t *testing.T) {
+				mkSvcDir(t)
+				touchFile(t, path.Join(configDir, serviceDir, "one.sh"), 0755)
+				touchFile(t, path.Join(configDir, serviceDir, "two.sh"), 0644)
+
+				cfg, err := Read()
+				assert.Nil(t, err)
+				assert.ElementsMatch(
+					t,
+					cfg.ServiceV0,
+					[]string{
+						path.Join(configDir, serviceDir, "one.sh"),
+					},
+				)
+			},
+		},
+		{
+			name: "empty",
+			testFunc: func(t *testing.T) {
+				mkSvcDir(t)
+
+				_, err := Read()
+				assert.NotNil(t, err)
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			setup(t)
+			tt.testFunc(t)
+			tear(t)
+		})
+	}
+}

config/crontab.go

@@ -4,54 +4,30 @@ import (
 	"bufio"
 	"errors"
 	"fmt"
+	"gitea.suyono.dev/suyono/wingmate"
 	"os"
 	"regexp"
 	"strconv"
 	"strings"
-	"time"
-
-	"gitea.suyono.dev/suyono/wingmate"
 )
 
-type CronExactSpec interface {
-	CronTimeSpec
-	Value() uint8
-}
-
-type CronMultipleOccurrenceSpec interface {
-	CronTimeSpec
-	Values() []uint8
-}
-
 type CronTimeSpec interface {
-	Type() wingmate.CronTimeType
+	//Type() wingmate.CronTimeType
-	Match(uint8) bool
+	//Match(uint8) bool
 }
 
-// type Cron interface {
-// 	Minute() CronTimeSpec
-// 	Hour() CronTimeSpec
-// 	DayOfMonth() CronTimeSpec
-// 	Month() CronTimeSpec
-// 	DayOfWeek() CronTimeSpec
-// }
-
 type Cron struct {
-	minute  CronTimeSpec
+	CronSchedule
-	hour    CronTimeSpec
+	Command string
-	dom     CronTimeSpec
-	month   CronTimeSpec
-	dow     CronTimeSpec
-	command string
-	lastRun time.Time
-	hasRun  bool
 }
 
 type cronField int
 
 const (
-	CrontabEntryRegex  = `^\s*(?P<minute>\S+)\s+(?P<hour>\S+)\s+(?P<dom>\S+)\s+(?P<month>\S+)\s+(?P<dow>\S+)\s+(?P<command>\S.*\S)\s*$`
+	CrontabEntryRegexPattern         = `^\s*(?P<minute>\S+)\s+(?P<hour>\S+)\s+(?P<dom>\S+)\s+(?P<month>\S+)\s+(?P<dow>\S+)\s+(?P<command>\S.*\S)\s*$`
-	CrontabSubmatchLen = 7
+	CrontabCommentLineRegexPattern   = `^\s*#.*$`
+	CrontabCommentSuffixRegexPattern = `^\s*([^#]+)#.*$`
+	CrontabSubMatchLen               = 7
 
 	minute cronField = iota
 	hour
@@ -60,21 +36,22 @@ const (
 	dow
 )
 
+var (
+	crontabEntryRegex         = regexp.MustCompile(CrontabEntryRegexPattern)
+	crontabCommentLineRegex   = regexp.MustCompile(CrontabCommentLineRegexPattern)
+	crontabCommentSuffixRegex = regexp.MustCompile(CrontabCommentSuffixRegexPattern)
+)
+
 func readCrontab(path string) ([]*Cron, error) {
 	var (
 		file    *os.File
 		err     error
 		scanner *bufio.Scanner
 		line    string
-		re      *regexp.Regexp
 		parts   []string
 		retval  []*Cron
 	)
 
-	if re, err = regexp.Compile(CrontabEntryRegex); err != nil {
-		return nil, err
-	}
-
 	if file, err = os.Open(path); err != nil {
 		return nil, err
 	}
@@ -87,41 +64,48 @@ func readCrontab(path string) ([]*Cron, error) {
 	for scanner.Scan() {
 		line = scanner.Text()
 
-		parts = re.FindStringSubmatch(line)
+		if crontabCommentLineRegex.MatchString(line) {
-		if len(parts) != CrontabSubmatchLen {
+			continue
+		}
+
+		parts = crontabCommentSuffixRegex.FindStringSubmatch(line)
+		if len(parts) == 2 {
+			line = parts[1]
+		}
+
+		parts = crontabEntryRegex.FindStringSubmatch(line)
+		if len(parts) != CrontabSubMatchLen {
 			wingmate.Log().Error().Msgf("invalid entry %s", line)
 			continue
 		}
 
-		c := &Cron{
+		c := &Cron{}
-			hasRun: false,
-		}
 		if err = c.setField(minute, parts[1]); err != nil {
-			wingmate.Log().Error().Msgf("error parsing minute field %#v", err)
+			wingmate.Log().Error().Msgf("error parsing Minute field %+v", err)
 			continue
 		}
 
 		if err = c.setField(hour, parts[2]); err != nil {
-			wingmate.Log().Error().Msgf("error parsing hour field %#v", err)
+			wingmate.Log().Error().Msgf("error parsing Hour field %+v", err)
 			continue
 		}
 
 		if err = c.setField(dom, parts[3]); err != nil {
-			wingmate.Log().Error().Msgf("error parsing day of month field %#v", err)
+			wingmate.Log().Error().Msgf("error parsing Day of Month field %+v", err)
 			continue
 		}
 
 		if err = c.setField(month, parts[4]); err != nil {
-			wingmate.Log().Error().Msgf("error parsing month field %#v", err)
+			wingmate.Log().Error().Msgf("error parsing Month field %+v", err)
 			continue
 		}
 
 		if err = c.setField(dow, parts[5]); err != nil {
-			wingmate.Log().Error().Msgf("error parsing day of week field %#v", err)
+			wingmate.Log().Error().Msgf("error parsing Day of Week field %+v", err)
 			continue
 		}
 
-		c.command = parts[6]
+		c.Command = parts[6]
 
 		retval = append(retval, c)
 	}
@@ -129,32 +113,6 @@ func readCrontab(path string) ([]*Cron, error) {
 	return retval, nil
 }
 
-func (c *Cron) Command() string {
-	return c.command
-}
-
-func (c *Cron) TimeToRun(now time.Time) bool {
-	if !c.hasRun {
-		c.lastRun = now
-		c.hasRun = true
-		return true
-	}
-
-	if now.Sub(c.lastRun) <= time.Minute && now.Minute() == c.lastRun.Minute() {
-		return false
-	}
-
-	if c.minute.Match(uint8(now.Minute())) &&
-		c.hour.Match(uint8(now.Hour())) &&
-		c.dom.Match(uint8(now.Day())) &&
-		c.month.Match(uint8(now.Month())) &&
-		c.dow.Match(uint8(now.Weekday())) {
-		return true
-	}
-
-	return false
-}
-
 type fieldRange struct {
 	min int
 	max int
@@ -187,33 +145,33 @@ func (c *Cron) setField(field cronField, input string) error {
 	switch field {
 	case minute:
 		fr = newRange(0, 59)
-		cField = &c.minute
+		cField = &c.Minute
 	case hour:
 		fr = newRange(0, 23)
-		cField = &c.hour
+		cField = &c.Hour
 	case dom:
 		fr = newRange(1, 31)
-		cField = &c.dom
+		cField = &c.DoM
 	case month:
 		fr = newRange(1, 12)
-		cField = &c.month
+		cField = &c.Month
 	case dow:
 		fr = newRange(0, 6)
-		cField = &c.dow
+		cField = &c.DoW
 	default:
 		return errors.New("invalid cron field descriptor")
 	}
 
 	if input == "*" {
-		*cField = &specAny{}
+		*cField = &SpecAny{}
 	} else if strings.HasPrefix(input, "*/") {
 		if parsed64, err = strconv.ParseUint(input[2:], 10, 8); err != nil {
-			return fmt.Errorf("error parse field %#v with input %s: %w", field, input, err)
+			return fmt.Errorf("error parse field %+v with input %s: %w", field, input, err)
 		}
 
 		parsed = uint8(parsed64)
-		if fr.valid(parsed) {
+		if !fr.valid(parsed) {
-			return fmt.Errorf("error parse field %#v with input %s: invalid value", field, input)
+			return fmt.Errorf("error parse field %+v with input %s parsed to %d: invalid value", field, input, parsed)
 		}
 		multi = make([]uint8, 0)
 		current = parsed
@@ -222,7 +180,7 @@ func (c *Cron) setField(field cronField, input string) error {
 			current += parsed
 		}
 
-		*cField = &specMultiOccurrence{
+		*cField = &SpecMultiOccurrence{
 			values: multi,
 		}
 	} else {
@@ -231,31 +189,31 @@ func (c *Cron) setField(field cronField, input string) error {
 			multi = make([]uint8, 0)
 			for _, s := range multiStr {
 				if parsed64, err = strconv.ParseUint(s, 10, 8); err != nil {
-					return fmt.Errorf("error parse field %#v with input %s: %w", field, input, err)
+					return fmt.Errorf("error parse field %+v with input %s: %w", field, input, err)
 				}
 
 				parsed = uint8(parsed64)
-				if fr.valid(parsed) {
+				if !fr.valid(parsed) {
-					return fmt.Errorf("error parse field %#v with input %s: invalid value", field, input)
+					return fmt.Errorf("error parse field %+v with input %s: invalid value", field, input)
 				}
 
 				multi = append(multi, parsed)
 			}
 
-			*cField = &specMultiOccurrence{
+			*cField = &SpecMultiOccurrence{
 				values: multi,
 			}
 		} else {
 			if parsed64, err = strconv.ParseUint(input, 10, 8); err != nil {
-				return fmt.Errorf("error parse field %#v with input %s: %w", field, input, err)
+				return fmt.Errorf("error parse field %+v with input %s: %w", field, input, err)
 			}
 
 			parsed = uint8(parsed64)
-			if fr.valid(parsed) {
+			if !fr.valid(parsed) {
-				return fmt.Errorf("error parse field %#v with input %s: invalid value", field, input)
+				return fmt.Errorf("error parse field %+v with input %s: invalid value", field, input)
 			}
 
-			*cField = &specExact{
+			*cField = &SpecExact{
 				value: parsed,
 			}
 		}
@@ -264,51 +222,21 @@ func (c *Cron) setField(field cronField, input string) error {
 	return nil
 }
 
-type specAny struct{}
+type SpecAny struct{}
 
-func (a *specAny) Type() wingmate.CronTimeType {
+type SpecExact struct {
-	return wingmate.Any
-}
-
-func (a *specAny) Match(u uint8) bool {
-	return true
-}
-
-type specExact struct {
 	value uint8
 }
 
-func (e *specExact) Type() wingmate.CronTimeType {
+func (e *SpecExact) Value() uint8 {
-	return wingmate.Exact
-}
-
-func (e *specExact) Match(u uint8) bool {
-	return u == e.value
-}
-
-func (e *specExact) Value() uint8 {
 	return e.value
 }
 
-type specMultiOccurrence struct {
+type SpecMultiOccurrence struct {
 	values []uint8
 }
 
-func (m *specMultiOccurrence) Type() wingmate.CronTimeType {
+func (m *SpecMultiOccurrence) Values() []uint8 {
-	return wingmate.MultipleOccurrence
-}
-
-func (m *specMultiOccurrence) Match(u uint8) bool {
-	for _, v := range m.values {
-		if v == u {
-			return true
-		}
-	}
-
-	return false
-}
-
-func (m *specMultiOccurrence) Values() []uint8 {
 	out := make([]uint8, len(m.values))
 	copy(out, m.values)
 	return out

config/crontab_test.go

@@ -0,0 +1,129 @@
+package config
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"gitea.suyono.dev/suyono/wingmate"
+	"github.com/stretchr/testify/assert"
+)
+
+const (
+	crontabFileName = "crontab"
+)
+
+func TestCrontab(t *testing.T) {
+	type testEntry struct {
+		name    string
+		crontab string
+		wantErr bool
+	}
+
+	_ = wingmate.NewLog(os.Stderr)
+	tests := []testEntry{
+		{
+			name:    "positive",
+			crontab: crontabTestCase0,
+			wantErr: false,
+		},
+		{
+			name:    "with comment",
+			crontab: crontabTestCase1,
+			wantErr: false,
+		},
+		{
+			name:    "various values",
+			crontab: crontabTestCase2,
+			wantErr: false,
+		},
+		{
+			name:    "failed to parse",
+			crontab: crontabTestCase3,
+			wantErr: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			setup(t)
+			defer tear(t)
+
+			writeCrontab(t, tt.crontab)
+
+			cfg, err := Read()
+			if tt.wantErr != (err != nil) {
+				t.Fatalf("wantErr is %v but err is %+v", tt.wantErr, err)
+			}
+
+			t.Logf("cfg: %+v", cfg)
+			for _, c := range cfg.CronV0 {
+				t.Logf("%+v", c)
+			}
+		})
+	}
+}
+
+func writeCrontab(t *testing.T, content string) {
+	var (
+		f   *os.File
+		err error
+	)
+
+	if f, err = os.Create(filepath.Join(configDir, crontabFileName)); err != nil {
+		t.Fatal("create crontab file", err)
+	}
+	defer func() {
+		_ = f.Close()
+	}()
+
+	if _, err = f.Write([]byte(content)); err != nil {
+		t.Fatal("writing crontab file", err)
+	}
+}
+
+const crontabTestCase0 = `* * * * *  /path/to/executable`
+const crontabTestCase1 = `# this is a comment
+  ## comment with space
+* * * * *  /path/to/executable
+* * * * *  /path/to/executable  # comment as a suffix
+`
+
+const crontabTestCase2 = `# first comment
+*/5 13 3,5,7 * *  /path/to/executable`
+
+const crontabTestCase3 = `a 13 3,5,7 * *  /path/to/executable
+*/5 a 3,5,7 * *  /path/to/executable
+*/5 13 a * *  /path/to/executable
+*/5 13 3,5,7 a *  /path/to/executable
+*/5 13 3,5,7 * a  /path/to/executable
+*/x 13 3,5,7 * *  /path/to/executable
+76 13 3,5,7 * *  /path/to/executable
+*/75 13 3,5,7 * *  /path/to/executable
+*/5 13 3,x,7 * *  /path/to/executable
+*/5 13 3,5,67 * *  /path/to/executable
+*/5 13 * *  /path/to/executable
+*/5 13 3,5,7 * *  /path/to/executable`
+
+func TestSpecExact(t *testing.T) {
+	var val uint8 = 45
+	s := SpecExact{
+		value: val,
+	}
+
+	assert.Equal(t, val, s.Value())
+}
+
+func TestSpecMulti(t *testing.T) {
+	val := []uint8{3, 5, 7, 15}
+	s := SpecMultiOccurrence{
+		values: val,
+	}
+
+	assert.ElementsMatch(t, val, s.Values())
+}
+
+func TestInvalidField(t *testing.T) {
+	c := &Cron{}
+	assert.NotNil(t, c.setField(cronField(99), "x"))
+}

config/flags.go

@@ -0,0 +1,26 @@
+package config
+
+import (
+	"fmt"
+
+	"gitea.suyono.dev/suyono/wingmate/cmd/cli"
+	"github.com/spf13/pflag"
+	"github.com/spf13/viper"
+)
+
+func ParseFlags() {
+	version := cli.Version(fmt.Sprintln(viper.GetString(WingmateVersion)))
+	version.FlagSet(pflag.CommandLine)
+
+	pflag.String(WMPidProxyPathFlag, "", "wmpidproxy path")
+	pflag.String(WMExecPathFlag, "", "wmexec path")
+	pflag.StringP(PathConfigFlag, "c", "", "config path")
+
+	pflag.Parse()
+
+	_ = viper.BindPFlag(PathConfig, pflag.CommandLine.Lookup(PathConfigFlag))
+	_ = viper.BindPFlag(PidProxyPathConfig, pflag.CommandLine.Lookup(WMPidProxyPathFlag))
+	_ = viper.BindPFlag(ExecPathConfig, pflag.CommandLine.Lookup(WMExecPathFlag))
+
+	version.FlagHook()
+}

config/util.go

@@ -0,0 +1,37 @@
+package config
+
+import (
+	"fmt"
+	"io"
+	"os/exec"
+	"strings"
+)
+
+func getVersion(binPath string) (string, error) {
+	var (
+		outBytes []byte
+		err      error
+		output   string
+		stdout   io.ReadCloser
+		n        int
+	)
+	cmd := exec.Command(binPath, "version")
+	if stdout, err = cmd.StdoutPipe(); err != nil {
+		return "", fmt.Errorf("setting up stdout reader: %w", err)
+	}
+
+	if err = cmd.Start(); err != nil {
+		return "", fmt.Errorf("starting process: %w", err)
+	}
+
+	outBytes = make([]byte, 1024)
+	if n, err = stdout.Read(outBytes); err != nil {
+		return "", fmt.Errorf("reading stdout: %w", err)
+	}
+
+	_ = cmd.Wait()
+
+	output = string(outBytes[:n])
+	output = strings.TrimRight(output, versionTrimRightCutSet)
+	return output, nil
+}

config/yaml.go

@@ -0,0 +1,203 @@
+package config
+
+import (
+	"errors"
+	"fmt"
+	"regexp"
+	"strconv"
+	"strings"
+
+	"gitea.suyono.dev/suyono/wingmate"
+	"github.com/spf13/viper"
+)
+
+const (
+	CrontabScheduleRegexPattern = `^\s*(?P<minute>\S+)\s+(?P<hour>\S+)\s+(?P<dom>\S+)\s+(?P<month>\S+)\s+(?P<dow>\S+)\s*$`
+	CrontabScheduleSubMatchLen  = 6
+	ServiceConfigGroup          = "service"
+	CronConfigGroup             = "cron"
+	ServiceKeyFormat            = "service.%s"
+	CronKeyFormat               = "cron.%s"
+)
+
+var (
+	crontabScheduleRegex = regexp.MustCompile(CrontabScheduleRegexPattern)
+)
+
+func readConfigYaml(path, name, format string) ([]ServiceTask, []CronTask, error) {
+	var (
+		err         error
+		nameMap     map[string]any
+		itemName    string
+		serviceTask ServiceTask
+		cronTask    CronTask
+		item        any
+		services    []ServiceTask
+		crones      []CronTask
+		//findUtils   *FindUtils
+	)
+
+	viper.AddConfigPath(path)
+	viper.SetConfigType(format)
+	viper.SetConfigName(name)
+
+	if err = viper.ReadInConfig(); err != nil {
+		return nil, nil, fmt.Errorf("reading config in dir %s, file %s, format %s: %w", path, name, format, err)
+	}
+
+	services = make([]ServiceTask, 0)
+	nameMap = viper.GetStringMap(ServiceConfigGroup)
+	for itemName, item = range nameMap {
+		serviceTask = ServiceTask{}
+		if err = viper.UnmarshalKey(fmt.Sprintf(ServiceKeyFormat, itemName), &serviceTask); err != nil {
+			wingmate.Log().Error().Msgf("failed to parse service %s: %+v | %+v", itemName, err, item)
+			continue
+		}
+		serviceTask.Name = itemName
+		services = append(services, serviceTask)
+	}
+
+	crones = make([]CronTask, 0)
+	nameMap = viper.GetStringMap(CronConfigGroup)
+	for itemName, item = range nameMap {
+		cronTask = CronTask{}
+		if err = viper.UnmarshalKey(fmt.Sprintf(CronKeyFormat, itemName), &cronTask); err != nil {
+			wingmate.Log().Error().Msgf("failed to parse cron %s: %v | %v", itemName, err, item)
+			continue
+		}
+		cronTask.Name = itemName
+		if cronTask.CronSchedule, err = parseYamlSchedule(cronTask.Schedule); err != nil {
+			wingmate.Log().Error().Msgf("parsing cron schedule: %+v", err)
+			continue
+		}
+		crones = append(crones, cronTask)
+	}
+
+	return services, crones, nil
+}
+
+func parseYamlSchedule(input string) (schedule CronSchedule, err error) {
+	var (
+		parts  []string
+		pSched *CronSchedule
+	)
+
+	parts = crontabScheduleRegex.FindStringSubmatch(input)
+	if len(parts) != CrontabScheduleSubMatchLen {
+		return schedule, fmt.Errorf("invalid schedule: %s", input)
+	}
+
+	pSched = &schedule
+	if err = pSched.setField(minute, parts[1]); err != nil {
+		return schedule, fmt.Errorf("error parsing Minute field: %w", err)
+	}
+
+	if err = pSched.setField(hour, parts[2]); err != nil {
+		return schedule, fmt.Errorf("error parsing Hour field: %w", err)
+	}
+
+	if err = pSched.setField(dom, parts[3]); err != nil {
+		return schedule, fmt.Errorf("error parsing Day of Month field: %w", err)
+	}
+
+	if err = pSched.setField(month, parts[4]); err != nil {
+		return schedule, fmt.Errorf("error parsing Month field: %w", err)
+	}
+
+	if err = pSched.setField(dow, parts[5]); err != nil {
+		return schedule, fmt.Errorf("error parsing Day of Week field: %w", err)
+	}
+
+	return
+}
+
+func (c *CronSchedule) setField(field cronField, input string) error {
+	var (
+		fr       *fieldRange
+		cField   *CronTimeSpec
+		err      error
+		parsed64 uint64
+		parsed   uint8
+		multi    []uint8
+		current  uint8
+		multiStr []string
+	)
+	switch field {
+	case minute:
+		fr = newRange(0, 59)
+		cField = &c.Minute
+	case hour:
+		fr = newRange(0, 23)
+		cField = &c.Hour
+	case dom:
+		fr = newRange(1, 31)
+		cField = &c.DoM
+	case month:
+		fr = newRange(1, 12)
+		cField = &c.Month
+	case dow:
+		fr = newRange(0, 6)
+		cField = &c.DoW
+	default:
+		return errors.New("invalid cron field descriptor")
+	}
+
+	if input == "*" {
+		*cField = &SpecAny{}
+	} else if strings.HasPrefix(input, "*/") {
+		if parsed64, err = strconv.ParseUint(input[2:], 10, 8); err != nil {
+			return fmt.Errorf("error parse field %+v with input %s: %w", field, input, err)
+		}
+
+		parsed = uint8(parsed64)
+		if !fr.valid(parsed) {
+			return fmt.Errorf("error parse field %+v with input %s parsed to %d: invalid value", field, input, parsed)
+		}
+		multi = make([]uint8, 0)
+		current = parsed
+		for fr.valid(current) {
+			multi = append(multi, current)
+			current += parsed
+		}
+
+		*cField = &SpecMultiOccurrence{
+			values: multi,
+		}
+	} else {
+		multiStr = strings.Split(input, ",")
+		if len(multiStr) > 1 {
+			multi = make([]uint8, 0)
+			for _, s := range multiStr {
+				if parsed64, err = strconv.ParseUint(s, 10, 8); err != nil {
+					return fmt.Errorf("error parse field %+v with input %s: %w", field, input, err)
+				}
+
+				parsed = uint8(parsed64)
+				if !fr.valid(parsed) {
+					return fmt.Errorf("error parse field %+v with input %s: invalid value", field, input)
+				}
+
+				multi = append(multi, parsed)
+			}
+
+			*cField = &SpecMultiOccurrence{
+				values: multi,
+			}
+		} else {
+			if parsed64, err = strconv.ParseUint(input, 10, 8); err != nil {
+				return fmt.Errorf("error parse field %+v with input %s: %w", field, input, err)
+			}
+
+			parsed = uint8(parsed64)
+			if !fr.valid(parsed) {
+				return fmt.Errorf("error parse field %+v with input %s: invalid value", field, input)
+			}
+
+			*cField = &SpecExact{
+				value: parsed,
+			}
+		}
+	}
+
+	return nil
+}

config/yaml_test.go

@@ -0,0 +1,258 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"path"
+	"testing"
+
+	"gitea.suyono.dev/suyono/wingmate"
+)
+
+const configName = "wingmate.yaml"
+
+func TestYaml(t *testing.T) {
+	type testEntry struct {
+		name    string
+		config  string
+		wantErr bool
+	}
+
+	_ = wingmate.NewLog(os.Stderr)
+	tests := []testEntry{
+		{
+			name:    "positive",
+			config:  yamlTestCase0,
+			wantErr: false,
+		},
+		{
+			name:    "service only",
+			config:  yamlTestCase1,
+			wantErr: false,
+		},
+		{
+			name:    "cron only",
+			config:  yamlTestCase2,
+			wantErr: false,
+		},
+		{
+			name:    "invalid content - service",
+			config:  yamlTestCase3,
+			wantErr: false,
+		},
+	}
+
+	for i, tc := range yamlBlobs {
+		tests = append(tests, testEntry{
+			name:    fmt.Sprintf("negative - %d", i),
+			config:  tc,
+			wantErr: true,
+		})
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			setup(t)
+			defer tear(t)
+
+			writeYaml(t, path.Join(configDir, configName), tt.config)
+
+			cfg, err := Read()
+			if tt.wantErr != (err != nil) {
+				t.Fatalf("wantErr is %v but err is %+v", tt.wantErr, err)
+			}
+			t.Logf("cfg: %+v", cfg)
+		})
+	}
+}
+
+func writeYaml(t *testing.T, path, content string) {
+	var (
+		f   *os.File
+		err error
+	)
+
+	if f, err = os.Create(path); err != nil {
+		t.Fatal("create yaml file", err)
+	}
+	defer func() {
+		_ = f.Close()
+	}()
+
+	if _, err = f.Write([]byte(content)); err != nil {
+		t.Fatal("write yaml file", err)
+	}
+}
+
+const yamlTestCase0 = `version: "1"
+service:
+    one:
+        command: ["command", "arg0", "arg1"]
+        environ: ["ENV1=value1", "ENV2=valueX"]
+        user: "user1"
+        group: "999"
+        working_dir: "/path/to/working"
+cron:
+    cron-one:
+        command:
+            - command-cron
+            - arg0
+            - arg1
+        environ: ["ENV1=v1", "ENV2=var2"]
+        user: "1001"
+        group: "978"
+        schedule: "*/5 * * * 2,3"`
+
+const yamlTestCase1 = `version: "1"
+service:
+    one:
+        command: ["command", "arg0", "arg1"]
+        environ: ["ENV1=value1", "ENV2=valueX"]
+        user: "user1"
+        group: "999"
+        working_dir: "/path/to/working"`
+
+const yamlTestCase2 = `version: "1"
+cron:
+    cron-one:
+        command:
+            - command-cron
+            - arg0
+            - arg1
+        environ: ["ENV1=v1", "ENV2=var2"]
+        user: "1001"
+        group: "978"
+        schedule: "*/5 * * * 2,3"`
+
+const yamlTestCase3 = `version: "1"
+service:
+    one:
+        command: 12345
+        environ: ["ENV1=value1", "ENV2=valueX"]
+        user: "user1"
+        group: "999"
+        working_dir: "/path/to/working"`
+
+var yamlBlobs = []string{
+	`version: "1"
+cron:
+    cron-one:
+        command:
+            - command-cron
+            - arg0
+            - arg1
+        environ: ["ENV1=v1", "ENV2=var2"]
+        user: "1001"
+        group: "978"
+        schedule: "a 13 3,5,7 * *"`,
+	`version: "1"
+cron:
+    cron-one:
+        command:
+            - command-cron
+            - arg0
+            - arg1
+        environ: ["ENV1=v1", "ENV2=var2"]
+        user: "1001"
+        group: "978"
+        schedule: "*/5 a 3,5,7 * *"`,
+	`version: "1"
+cron:
+    cron-one:
+        command:
+            - command-cron
+            - arg0
+            - arg1
+        environ: ["ENV1=v1", "ENV2=var2"]
+        user: "1001"
+        group: "978"
+        schedule: "*/5 13 a * *"`,
+	`version: "1"
+cron:
+    cron-one:
+        command:
+            - command-cron
+            - arg0
+            - arg1
+        environ: ["ENV1=v1", "ENV2=var2"]
+        user: "1001"
+        group: "978"
+        schedule: "*/5 13 3,5,7 a *"`,
+	`version: "1"
+cron:
+    cron-one:
+        command:
+            - command-cron
+            - arg0
+            - arg1
+        environ: ["ENV1=v1", "ENV2=var2"]
+        user: "1001"
+        group: "978"
+        schedule: "*/5 13 3,5,7 * a"`,
+	`version: "1"
+cron:
+    cron-one:
+        command:
+            - command-cron
+            - arg0
+            - arg1
+        environ: ["ENV1=v1", "ENV2=var2"]
+        user: "1001"
+        group: "978"
+        schedule: "*/x 13 3,5,7 * *"`,
+	`version: "1"
+cron:
+    cron-one:
+        command:
+            - command-cron
+            - arg0
+            - arg1
+        environ: ["ENV1=v1", "ENV2=var2"]
+        user: "1001"
+        group: "978"
+        schedule: "76 13 3,5,7 * *"`,
+	`version: "1"
+cron:
+    cron-one:
+        command:
+            - command-cron
+            - arg0
+            - arg1
+        environ: ["ENV1=v1", "ENV2=var2"]
+        user: "1001"
+        group: "978"
+        schedule: "*/75 13 3,5,7 * *"`,
+	`version: "1"
+cron:
+    cron-one:
+        command:
+            - command-cron
+            - arg0
+            - arg1
+        environ: ["ENV1=v1", "ENV2=var2"]
+        user: "1001"
+        group: "978"
+        schedule: "*/5 13 3,x,7 * *"`,
+	`version: "1"
+cron:
+    cron-one:
+        command:
+            - command-cron
+            - arg0
+            - arg1
+        environ: ["ENV1=v1", "ENV2=var2"]
+        user: "1001"
+        group: "978"
+        schedule: "*/5 13 3,5,67 * *"`,
+	`version: "1"
+cron:
+    cron-one:
+        command:
+            - command-cron
+            - arg0
+            - arg1
+        environ: ["ENV1=v1", "ENV2=var2"]
+        user: "1001"
+        group: "978"
+        schedule: "*/5 13 * *"`,
+}

docker/alpine/Dockerfile

@@ -0,0 +1,22 @@
+FROM golang:1.22-alpine3.20 AS builder
+
+ADD . /root/wingmate
+WORKDIR /root/wingmate/
+ARG TEST_BUILD
+RUN apk update && apk add git make build-base && \
+    CGO_ENABLED=1 make all && \
+    make DESTDIR=/usr/local/bin/wingmate install
+
+
+
+FROM alpine:3.20
+
+RUN apk add tzdata && ln -s /usr/share/zoneinfo/Australia/Sydney /etc/localtime && \
+    adduser -h /home/user1 -D -s /bin/sh user1 && \
+    adduser -h /home/user2 -D -s /bin/sh user2
+COPY --from=builder /usr/local/bin/wingmate/ /usr/local/bin/
+ADD --chmod=755 docker/alpine/entry.sh /usr/local/bin/entry.sh
+ADD --chmod=755 docker/alpine/etc /etc
+
+ENTRYPOINT [ "/usr/local/bin/entry.sh" ]
+CMD [ "/usr/local/bin/wingmate" ]

docker/alpine/entry.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+if [ $# -gt 0 ]; then
+    exec "$@"
+else
+    exec /usr/local/bin/wingmate
+fi

docker/alpine/etc/wingmate/crontab

@@ -0,0 +1,3 @@
+*/5 * * * * /etc/wingmate/crontab.d/cron1.sh
+17,42 */2 * * * /etc/wingmate/crontab.d/cron2.sh
+7,19,23,47 22 * * * /etc/wingmate/crontab.d/cron3.sh

docker/alpine/etc/wingmate/crontab.d/cron1.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+export WINGMATE_DUMMY_PATH=/usr/local/bin/wmdummy
+export WINGMATE_LOG=/var/log/cron1.log
+export WINGMATE_LOG_MESSAGE="cron executed in minute 5,10,15,20,25,30,35,40,45,50,55"
+
+echo "I'm runnig with dummy=$WINGMATE_DUMMY_PATH, log=$WINGMATE_LOG and mesage=$WINGMATE_LOG_MESSAGE" >> /var/log/debug-cron.log
+
+exec /usr/local/bin/wmoneshot

docker/alpine/etc/wingmate/crontab.d/cron2.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+export WINGMATE_DUMMY_PATH=/usr/local/bin/wmdummy
+export WINGMATE_LOG=/var/log/cron2.log
+export WINGMATE_LOG_MESSAGE="cron scheduled using 17,42 */2 * * *"
+
+exec /usr/local/bin/wmoneshot

docker/alpine/etc/wingmate/crontab.d/cron3.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+export WINGMATE_DUMMY_PATH=/usr/local/bin/wmdummy
+export WINGMATE_LOG=/var/log/cron3.log
+export WINGMATE_LOG_MESSAGE="cron entry: 7,19,23,47 22 * * * /etc/wingmate/crontab.d/cron3.sh"
+
+exec /usr/local/bin/wmoneshot

docker/alpine/etc/wingmate/service/one.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+
+export DUMMY_PATH=/usr/local/bin/wmdummy
+exec /usr/local/bin/wmexec --setsid --user user1:user1 -- /usr/local/bin/wmstarter

docker/alpine/etc/wingmate/service/spawner.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+export WINGMATE_ONESHOT_PATH=/usr/local/bin/wmoneshot
+export WINGMATE_DUMMY_PATH=/usr/local/bin/wmdummy
+exec /usr/local/bin/wmexec --user 1001 -- /usr/local/bin/wmspawner

docker/alpine/etc/wingmate/wingmate.yaml

@@ -0,0 +1,59 @@
+service:
+#  one:
+#    command: [ "wmstarter" ]
+#    environ: [ "DUMMY_PATH=/workspace/wingmate/cmd/experiment/dummy/dummy" ]
+
+  spawner:
+    command: [ "wmspawner" ]
+    user: "1200"
+
+  bgtest:
+    command:
+      - "wmstarter"
+      - "--no-wait"
+      - "--"
+      - "wmexec"
+      - "--setsid"
+      - "--"
+      - "wmbg"
+      - "--name"
+      - "test-run"
+      - "--pause"
+      - "10"
+      - "--log-path"
+      - "/var/log/wmbg.log"
+      - "--pid-file"
+      - "/var/run/wmbg.pid"
+    pidfile: "/var/run/wmbg.pid"
+
+cron:
+  cron1:
+    command:
+      - "wmoneshot"
+      - "--"
+      - "sleep"
+      - "5"
+    schedule: "*/5 * * * *"
+    environ:
+      - "WINGMATE_LOG=/var/log/cron1.log"
+      - "WINGMATE_LOG_MESSAGE=cron executed in minute 5,10,15,20,25,30,35,40,45,50,55"
+  cron2:
+    command:
+      - "wmoneshot"
+      - "--"
+      - "sleep"
+      - "5"
+    schedule: "17,42 */2 * * *"
+    environ:
+      - "WINGMATE_LOG=/var/log/cron2.log"
+      - "WINGMATE_LOG_MESSAGE=cron scheduled using 17,42 */2 * * *"
+  cron3:
+    command:
+      - "wmoneshot"
+      - "--"
+      - "sleep"
+      - "5"
+    schedule: "7,19,23,47 22 * * *"
+    environ:
+      - "WINGMATE_LOG=/var/log/cron3.log"
+      - "WINGMATE_LOG_MESSAGE=cron scheduled using 7,19,23,47 22 * * *"

docker/bookworm/Dockerfile

@@ -0,0 +1,20 @@
+FROM golang:1.22-bookworm AS builder
+
+ADD . /root/wingmate
+WORKDIR /root/wingmate/
+ARG TEST_BUILD
+RUN make all && make DESTDIR=/usr/local/bin/wingmate install
+
+
+
+FROM debian:bookworm
+
+RUN ln -sf /usr/share/zoneinfo/Australia/Sydney /etc/localtime && \
+    apt update && apt install -y procps && \
+    useradd -m -s /bin/bash user1
+COPY --from=builder /usr/local/bin/wingmate/ /usr/local/bin/
+ADD --chmod=755 docker/bookworm/entry.sh /usr/local/bin/entry.sh
+ADD --chmod=755 docker/bookworm/etc /etc
+
+ENTRYPOINT [ "/usr/local/bin/entry.sh" ]
+CMD [ "/usr/local/bin/wingmate" ]

docker/bookworm/entry.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/bash
+
+if [ $# -gt 0 ]; then
+    exec "$@"
+else
+    exec /usr/local/bin/wingmate
+fi

docker/bookworm/etc/wingmate/wingmate.yaml

@@ -0,0 +1,59 @@
+service:
+#  one:
+#    command: [ "wmstarter" ]
+#    environ: [ "DUMMY_PATH=/workspace/wingmate/cmd/experiment/dummy/dummy" ]
+
+  spawner:
+    command: [ "wmspawner" ]
+    user: "1200"
+
+  bgtest:
+    command:
+      - "wmstarter"
+      - "--no-wait"
+      - "--"
+      - "wmexec"
+      - "--setsid"
+      - "--"
+      - "wmbg"
+      - "--name"
+      - "test-run"
+      - "--pause"
+      - "10"
+      - "--log-path"
+      - "/var/log/wmbg.log"
+      - "--pid-file"
+      - "/var/run/wmbg.pid"
+    pidfile: "/var/run/wmbg.pid"
+
+cron:
+  cron1:
+    command:
+      - "wmoneshot"
+      - "--"
+      - "sleep"
+      - "5"
+    schedule: "*/5 * * * *"
+    environ:
+      - "WINGMATE_LOG=/var/log/cron1.log"
+      - "WINGMATE_LOG_MESSAGE=cron executed in minute 5,10,15,20,25,30,35,40,45,50,55"
+  cron2:
+    command:
+      - "wmoneshot"
+      - "--"
+      - "sleep"
+      - "5"
+    schedule: "17,42 */2 * * *"
+    environ:
+      - "WINGMATE_LOG=/var/log/cron2.log"
+      - "WINGMATE_LOG_MESSAGE=cron scheduled using 17,42 */2 * * *"
+  cron3:
+    command:
+      - "wmoneshot"
+      - "--"
+      - "sleep"
+      - "5"
+    schedule: "7,19,23,47 22 * * *"
+    environ:
+      - "WINGMATE_LOG=/var/log/cron3.log"
+      - "WINGMATE_LOG_MESSAGE=cron scheduled using 7,19,23,47 22 * * *"

docker/test/no-config/alpine/Dockerfile

@@ -0,0 +1,8 @@
+FROM suyono/wingmate:test AS source
+
+
+FROM alpine:3.20
+COPY --from=source /usr/local/bin/ /usr/local/bin/
+
+ENTRYPOINT [ "/usr/local/bin/entry.sh" ]
+CMD [ "/usr/local/bin/wingmate" ]

docker/test/no-config/bookworm/Dockerfile

@@ -0,0 +1,8 @@
+FROM suyono/wingmate:test AS source
+
+
+FROM debian:bookworm
+COPY --from=source /usr/local/bin/ /usr/local/bin/
+
+ENTRYPOINT [ "/usr/local/bin/entry.sh" ]
+CMD [ "/usr/local/bin/wingmate" ]

example/ssh-docker/Dockerfile

@@ -0,0 +1,14 @@
+FROM suyono/wingmate:alpine as source
+
+FROM alpine:3.19
+
+RUN apk update && apk add tzdata openssh-server && \
+    ln -s /usr/share/zoneinfo/Australia/Sydney /etc/localtime && ssh-keygen -A
+
+COPY --from=source /usr/local/bin/wingmate /usr/local/bin/
+COPY --from=source /usr/local/bin/wmpidproxy /usr/local/bin/
+ADD --chmod=755 example/ssh-docker/entry.sh /usr/local/bin/entry.sh
+ADD --chmod=755 example/ssh-docker/etc /etc
+
+ENTRYPOINT [ "/usr/local/bin/entry.sh" ]
+CMD [ "/usr/local/bin/wingmate" ]

example/ssh-docker/entry.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+if [ $# -gt 0 ]; then
+    exec "$@"
+else
+    exec /usr/local/bin/wingmate
+fi

example/ssh-docker/etc/wingmate/service/sshd.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+exec /usr/local/bin/wmpidproxy --pid-file /var/run/sshd.pid -- /usr/sbin/sshd

files/testconfig/one.go

@@ -1,9 +0,0 @@
-package testconfig
-
-var One = `service:
-  one:
-    command: "mycommand -o output"
-  two:
-    command: ["cmd", "now"]
-    workdir: /
-`

files/testconfig/one.yml

@@ -1,6 +0,0 @@
-service:
-  one:
-    command: "mycommand -o output"
-  two:
-    command: ["cmd", "now"]
-    workdir: /

go.mod

@@ -1,13 +1,14 @@
 module gitea.suyono.dev/suyono/wingmate
 
-go 1.21
+go 1.22.7
 
 require (
-	github.com/rs/zerolog v1.30.0
+	github.com/rs/zerolog v1.33.0
-	github.com/spf13/cobra v1.7.0
+	github.com/spf13/cobra v1.8.1
-	github.com/spf13/viper v1.17.0
+	github.com/spf13/pflag v1.0.5
-	github.com/stretchr/testify v1.8.4
+	github.com/spf13/viper v1.19.0
-	golang.org/x/sys v0.15.0
+	github.com/stretchr/testify v1.9.0
+	golang.org/x/sys v0.25.0
 )
 
 require (
@@ -17,22 +18,19 @@ require (
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/magiconair/properties v1.8.7 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
-	github.com/mattn/go-isatty v0.0.19 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
-	github.com/pelletier/go-toml/v2 v2.1.0 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.3 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
-	github.com/sagikazarmark/locafero v0.4.0 // indirect
+	github.com/sagikazarmark/locafero v0.6.0 // indirect
 	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
 	github.com/sourcegraph/conc v0.3.0 // indirect
 	github.com/spf13/afero v1.11.0 // indirect
-	github.com/spf13/cast v1.6.0 // indirect
+	github.com/spf13/cast v1.7.0 // indirect
-	github.com/spf13/jwalterweatherman v1.1.0 // indirect
-	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/subosito/gotenv v1.6.0 // indirect
-	go.uber.org/atomic v1.11.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	golang.org/x/exp v0.0.0-20231127185646-65229373498e // indirect
+	golang.org/x/exp v0.0.0-20240909161429-701f63a606c0 // indirect
-	golang.org/x/text v0.14.0 // indirect
+	golang.org/x/text v0.18.0 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,533 +1,110 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
-cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
-cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
-cloud.google.com/go v0.44.3/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
-cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
-cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
-cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
-cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
-cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
-cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
-cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
-cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
-cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
-cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
-cloud.google.com/go v0.72.0/go.mod h1:M+5Vjvlc2wnp6tjzE102Dw08nGShTscUx2nZMufOKPI=
-cloud.google.com/go v0.74.0/go.mod h1:VV1xSbzvo+9QJOxLDaJfTjx5e+MePCpCWwvftOeQmWk=
-cloud.google.com/go v0.75.0/go.mod h1:VGuuCn7PG0dwsd5XPVm2Mm3wlh3EL55/79EKB6hlPTY=
-cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
-cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
-cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
-cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
-cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
-cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
-cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
-cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
-cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
-cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
-cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
-cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
-cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
-cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
-cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
-cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
-cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
-cloud.google.com/go/storage v1.14.0/go.mod h1:GrKmX003DSIwi9o29oFT7YDnHYwZoctc3fOKtUw0Xmo=
-dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
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-github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
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 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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 github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
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 gopkg.in/ini.v1 v1.67.0 h1:Dgnx+6+nfE+IfzjUEISNeydPJh9AXNNsWbGP9KzCsOA=
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-rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
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init/cron.go

@@ -1,6 +1,8 @@
 package init
 
 import (
+	"io"
+	"os"
 	"os/exec"
 	"sync"
 	"time"
@@ -8,19 +10,73 @@ import (
 	"gitea.suyono.dev/suyono/wingmate"
 )
 
-func (i *Init) cron(wg *sync.WaitGroup, cron Cron, exitFlag <-chan any) {
+const (
+	cronTag = "cron"
+)
+
+func (i *Init) cron(wg *sync.WaitGroup, cron CronTask, exitFlag <-chan any) {
 	defer wg.Done()
 
-	ticker := time.NewTicker(time.Second * 20)
+	var (
+		iwg    *sync.WaitGroup
+		err    error
+		stdout io.ReadCloser
+		stderr io.ReadCloser
+		cmd    *exec.Cmd
+	)
+
+	ticker := time.NewTicker(time.Second * 30)
 cron:
 	for {
 		if cron.TimeToRun(time.Now()) {
-			cmd := exec.Command(cron.Command().Path())
+			wingmate.Log().Info().Str(cronTag, cron.Name()).Msg("executing")
-			if err := cmd.Run(); err != nil {
+			if err = cron.UtilDepCheck(); err != nil {
-				wingmate.Log().Error().Msgf("running cron %s error %#v", cron.Command().Path(), err)
+				wingmate.Log().Error().Str(cronTag, cron.Name()).Msgf("%+v", err)
+				goto fail
 			}
+			cmd = exec.Command(cron.Command(), cron.Arguments()...)
+			cmd.Env = os.Environ()
+			if cron.EnvLen() > 0 {
+				cmd.Env = append(cmd.Env, cron.Environ()...)
 			}
 
+			if len(cron.WorkingDir()) > 0 {
+				cmd.Dir = cron.WorkingDir()
+			}
+
+			iwg = &sync.WaitGroup{}
+
+			if stdout, err = cmd.StdoutPipe(); err != nil {
+				wingmate.Log().Error().Str(cronTag, cron.Name()).Msgf("stdout pipe: %+v", err)
+				goto fail
+			}
+
+			if stderr, err = cmd.StderrPipe(); err != nil {
+				wingmate.Log().Error().Str(cronTag, cron.Name()).Msgf("stderr pipe: %+v", err)
+				_ = stdout.Close()
+				goto fail
+			}
+
+			iwg.Add(1)
+			go i.pipeReader(iwg, stdout, cronTag, cron.Name())
+
+			iwg.Add(1)
+			go i.pipeReader(iwg, stderr, cronTag, cron.Name())
+
+			if err := cmd.Start(); err != nil {
+				wingmate.Log().Error().Msgf("starting cron %s error %+v", cron.Name(), err)
+				_ = stdout.Close()
+				_ = stderr.Close()
+				iwg.Wait()
+				goto fail
+			}
+
+			iwg.Wait()
+
+			_ = cmd.Wait()
+		}
+
+	fail:
 		select {
 		case <-exitFlag:
 			ticker.Stop()

init/init.go

@@ -1,22 +1,55 @@
 package init
 
 import (
+	"os"
 	"sync"
 	"time"
 )
 
-type Path interface {
+type Tasks interface {
-	Path() string
+	List() []Task
+	Services() []ServiceTask
+	Crones() []CronTask
+	Get(string) (Task, error)
 }
 
-type Cron interface {
+type UserGroup interface {
-	Command() Path
+	String() string
+	IsSet() bool
+}
+
+type TaskStatus interface {
+}
+
+type Task interface {
+	Name() string
+	Command() string
+	Arguments() []string
+	EnvLen() int
+	Environ() []string
+	Setsid() bool
+	UserGroup() UserGroup
+	WorkingDir() string
+	Status() TaskStatus
+	UtilDepCheck() error
+}
+
+type CronTask interface {
+	Task
 	TimeToRun(time.Time) bool
 }
 
+type ServiceTask interface {
+	Task
+	Background() bool //NOTE: implies using wmpidproxy
+	PidFile() string  //NOTE: implies using wmpidproxy
+	StartSecs() uint
+	AutoStart() bool
+	AutoRestart() bool
+}
+
 type Config interface {
-	Services() []Path
+	Tasks() Tasks
-	Cron() []Cron
 }
 
 type Init struct {
@@ -34,24 +67,26 @@ func (i *Init) Start() {
 		wg             *sync.WaitGroup
 		signalTrigger  chan any
 		sighandlerExit chan any
+		sigchld        chan os.Signal
 	)
 
 	signalTrigger = make(chan any)
 	sighandlerExit = make(chan any)
+	sigchld = make(chan os.Signal, 1)
 
 	wg = &sync.WaitGroup{}
 	wg.Add(1)
-	go i.waiter(wg, signalTrigger, sighandlerExit)
+	go i.waiter(wg, signalTrigger, sighandlerExit, sigchld)
 
 	wg.Add(1)
-	go i.sighandler(wg, signalTrigger, sighandlerExit)
+	go i.sighandler(wg, signalTrigger, sighandlerExit, sigchld)
 
-	for _, s := range i.config.Services() {
+	for _, s := range i.config.Tasks().Services() {
 		wg.Add(1)
 		go i.service(wg, s, signalTrigger)
 	}
 
-	for _, c := range i.config.Cron() {
+	for _, c := range i.config.Tasks().Crones() {
 		wg.Add(1)
 		go i.cron(wg, c, signalTrigger)
 	}

init/service.go

@@ -1,26 +1,91 @@
 package init
 
 import (
+	"bufio"
+	"io"
+	"os"
 	"os/exec"
 	"sync"
+	"time"
 
 	"gitea.suyono.dev/suyono/wingmate"
 )
 
-func (i *Init) service(wg *sync.WaitGroup, path Path, exitFlag <-chan any) {
+const (
+	serviceTag = "service"
+)
+
+func (i *Init) service(wg *sync.WaitGroup, task ServiceTask, exitFlag <-chan any) {
 	defer wg.Done()
 
 	var (
 		err        error
+		iwg        *sync.WaitGroup
+		stderr     io.ReadCloser
+		stdout     io.ReadCloser
+		failStatus bool
+		cmd        *exec.Cmd
 	)
 
+	defer func() {
+		wingmate.Log().Info().Str(serviceTag, task.Name()).Msg("stopped")
+	}()
+
 service:
 	for {
-		cmd := exec.Command(path.Path())
+		failStatus = false
-		if err = cmd.Run(); err != nil {
+		if err = task.UtilDepCheck(); err != nil {
-			wingmate.Log().Error().Msgf("starting service %s error %#v", path.Path(), err)
+			wingmate.Log().Error().Str(serviceTag, task.Name()).Msgf("%+v", err)
+			failStatus = true
+			goto fail
+		}
+		cmd = exec.Command(task.Command(), task.Arguments()...)
+		cmd.Env = os.Environ()
+		if task.EnvLen() > 0 {
+			cmd.Env = append(cmd.Env, task.Environ()...)
 		}
 
+		if len(task.WorkingDir()) > 0 {
+			cmd.Dir = task.WorkingDir()
+		}
+
+		iwg = &sync.WaitGroup{}
+
+		if stdout, err = cmd.StdoutPipe(); err != nil {
+			wingmate.Log().Error().Str(serviceTag, task.Name()).Msgf("stdout pipe: %#v", err)
+			failStatus = true
+			goto fail
+		}
+		iwg.Add(1)
+		go i.pipeReader(iwg, stdout, serviceTag, task.Name())
+
+		if stderr, err = cmd.StderrPipe(); err != nil {
+			wingmate.Log().Error().Str(serviceTag, task.Name()).Msgf("stderr pipe: %#v", err)
+			_ = stdout.Close()
+			failStatus = true
+			goto fail
+		}
+		iwg.Add(1)
+		go i.pipeReader(iwg, stderr, serviceTag, task.Name())
+
+		if err = cmd.Start(); err != nil {
+			wingmate.Log().Error().Msgf("starting service %s error %#v", task.Name(), err)
+			failStatus = true
+			_ = stdout.Close()
+			_ = stderr.Close()
+			iwg.Wait()
+			goto fail
+		}
+
+		iwg.Wait()
+
+		_ = cmd.Wait()
+
+	fail:
+		if failStatus {
+			time.Sleep(time.Second)
+			failStatus = false
+		}
 		select {
 		case <-exitFlag:
 			break service
@@ -29,3 +94,18 @@ service:
 	}
 
 }
+
+func (i *Init) pipeReader(wg *sync.WaitGroup, pipe io.ReadCloser, tag, serviceName string) {
+	defer wg.Done()
+
+	scanner := bufio.NewScanner(pipe)
+	for scanner.Scan() {
+		wingmate.Log().Info().Str(tag, serviceName).Msg(scanner.Text())
+	}
+
+	if err := scanner.Err(); err != nil {
+		wingmate.Log().Error().Str(tag, serviceName).Msgf("got error when reading pipe: %#v", err)
+	}
+
+	wingmate.Log().Info().Str(tag, serviceName).Msg("closing pipe")
+}

init/sighandler.go

@@ -5,11 +5,16 @@ import (
 	"os/signal"
 	"sync"
 
+	"gitea.suyono.dev/suyono/wingmate"
 	"golang.org/x/sys/unix"
 )
 
-func (i *Init) sighandler(wg *sync.WaitGroup, trigger chan<- any, selfExit <-chan any) {
+func (i *Init) sighandler(wg *sync.WaitGroup, trigger chan<- any, selfExit <-chan any, sigchld chan<- os.Signal) {
-	defer wg.Wait()
+	defer wg.Done()
+
+	defer func() {
+		wingmate.Log().Warn().Msg("signal handler: exiting")
+	}()
 
 	isOpen := true
 
@@ -23,14 +28,21 @@ signal:
 			switch s {
 			case unix.SIGTERM, unix.SIGINT:
 				if isOpen {
+					wingmate.Log().Info().Msg("initiating shutdown...")
 					close(trigger)
+					wg.Add(1)
+					go i.signalPump(wg, selfExit)
 					isOpen = false
 				}
 			case unix.SIGCHLD:
-				// do nothing
+				select {
+				case sigchld <- s:
+				default:
+				}
 			}
 
 		case <-selfExit:
+			wingmate.Log().Warn().Msg("signal handler received completion flag")
 			break signal
 		}
 	}

init/signal-pump.go

@@ -0,0 +1,71 @@
+package init
+
+import (
+	"sync"
+	"time"
+
+	"gitea.suyono.dev/suyono/wingmate"
+	"golang.org/x/sys/unix"
+)
+
+type status int
+
+const (
+	triggered status = iota
+	expired
+)
+
+func (i *Init) signalPump(wg *sync.WaitGroup, selfExit <-chan any) {
+	defer wg.Done()
+	defer func() {
+		wingmate.Log().Info().Msg("signal pump completed")
+	}()
+
+	if seStatus := i.sigTermPump(time.Now(), selfExit); seStatus == triggered {
+		return
+	}
+
+	i.sigKillPump(time.Now(), selfExit)
+}
+
+func (i *Init) sigKillPump(startTime time.Time, selfExit <-chan any) {
+	t := time.NewTicker(time.Millisecond * 200)
+	defer t.Stop()
+
+	wingmate.Log().Info().Msg("start pumping SIGKILL signal")
+	defer func() {
+		wingmate.Log().Info().Msg("stop pumping SIGKILL signal")
+	}()
+
+	for time.Since(startTime) < time.Second {
+		_ = unix.Kill(-1, unix.SIGKILL)
+
+		select {
+		case <-t.C:
+		case <-selfExit:
+			return
+		}
+	}
+}
+
+func (i *Init) sigTermPump(startTime time.Time, selfExit <-chan any) status {
+	t := time.NewTicker(time.Millisecond * 100)
+	defer t.Stop()
+
+	wingmate.Log().Info().Msg("start pumping SIGTERM signal")
+	defer func() {
+		wingmate.Log().Info().Msg("stop pumping SIGTERM signal")
+	}()
+
+	for time.Since(startTime) < time.Duration(time.Second*4) {
+		_ = unix.Kill(-1, unix.SIGTERM)
+
+		select {
+		case <-t.C:
+		case <-selfExit:
+			return triggered
+		}
+	}
+
+	return expired
+}

init/waiter.go

@@ -2,35 +2,68 @@ package init
 
 import (
 	"errors"
+	"os"
 	"sync"
 
+	"gitea.suyono.dev/suyono/wingmate"
 	"golang.org/x/sys/unix"
 )
 
-func (i *Init) waiter(wg *sync.WaitGroup, runningFlag <-chan any, sigHandlerFlag chan<- any) {
+func (i *Init) waiter(wg *sync.WaitGroup, runningFlag <-chan any, sigHandlerFlag chan<- any, sigchld <-chan os.Signal) {
 	var (
 		ws               unix.WaitStatus
-		// pid     int
 		err              error
 		running          bool
+		flagged          bool
+		waitingForSignal bool
 	)
+	defer wg.Done()
+
+	defer func() {
+		wingmate.Log().Info().Msg("waiter exiting...")
+	}()
 
 	running = true
+	flagged = true
+	waitingForSignal = true
 wait:
 	for {
+		if running {
+			if waitingForSignal {
 				select {
 				case <-runningFlag:
+					wingmate.Log().Info().Msg("waiter received shutdown signal...")
+					running = false
+				case <-sigchld:
+					waitingForSignal = false
+				}
+
+			} else {
+				select {
+				case <-runningFlag:
+					wingmate.Log().Info().Msg("waiter received shutdown signal...")
 					running = false
 				default:
 				}
 
+			}
+		}
+
 		if _, err = unix.Wait4(-1, &ws, 0, nil); err != nil {
 			if errors.Is(err, unix.ECHILD) {
 				if !running {
+					if flagged {
 						close(sigHandlerFlag)
+						flagged = false
+						wingmate.Log().Warn().Msg("waiter: inner flag")
+					}
+					wingmate.Log().Warn().Msg("waiter: no child left")
 					break wait
 				}
 			}
+
+			wingmate.Log().Warn().Msgf("Wait4 returns error: %+v", err)
+			waitingForSignal = true
 		}
 	}
 }

logger.go

@@ -1,9 +1,15 @@
 package wingmate
 
 import (
+	"io"
+	"time"
+
 	"gitea.suyono.dev/suyono/wingmate/logger"
 	"github.com/rs/zerolog"
-	"io"
+)
+
+const (
+	timeTag = "time"
 )
 
 var (
@@ -29,13 +35,37 @@ func Log() logger.Log {
 }
 
 func (w *wrapper) Info() logger.Content {
-	return w.log.Info()
+	return (*eventWrapper)(w.log.Info().Time(timeTag, time.Now()))
 }
 
 func (w *wrapper) Warn() logger.Content {
-	return w.log.Warn()
+	return (*eventWrapper)(w.log.Warn().Time(timeTag, time.Now()))
 }
 
 func (w *wrapper) Error() logger.Content {
-	return w.log.Error()
+	return (*eventWrapper)(w.log.Error().Time(timeTag, time.Now()))
+}
+
+func (w *wrapper) Fatal() logger.Content {
+	return (*eventWrapper)(w.log.Fatal().Time(timeTag, time.Now()))
+}
+
+type eventWrapper zerolog.Event
+
+func (w *eventWrapper) Msg(msg string) {
+	(*zerolog.Event)(w).Msg(msg)
+}
+
+func (w *eventWrapper) Msgf(format string, data ...any) {
+	(*zerolog.Event)(w).Msgf(format, data...)
+}
+
+func (w *eventWrapper) Str(key, value string) logger.Content {
+	rv := (*zerolog.Event)(w).Str(key, value)
+	return (*eventWrapper)(rv)
+}
+
+func (w *eventWrapper) Err(err error) logger.Content {
+	rv := (*zerolog.Event)(w).Err(err)
+	return (*eventWrapper)(rv)
 }

logger/logger.go

@@ -3,12 +3,15 @@ package logger
 type Content interface {
 	Msg(string)
 	Msgf(string, ...any)
+	Str(string, string) Content
+	Err(error) Content
 }
 
 type Level interface {
 	Info() Content
 	Warn() Content
 	Error() Content
+	Fatal() Content
 }
 
 type Log interface {

task/cron.go

@@ -0,0 +1,292 @@
+package task
+
+import (
+	"crypto/sha256"
+	"encoding/json"
+	"fmt"
+	"time"
+
+	"gitea.suyono.dev/suyono/wingmate"
+
+	wminit "gitea.suyono.dev/suyono/wingmate/init"
+)
+
+type CronSchedule struct {
+	Minute CronTimeSpec
+	Hour   CronTimeSpec
+	DoM    CronTimeSpec
+	Month  CronTimeSpec
+	DoW    CronTimeSpec
+}
+
+type CronTimeSpec interface {
+	Match(uint8) bool
+}
+
+type CronAnySpec struct {
+}
+
+func NewCronAnySpec() *CronAnySpec {
+	return &CronAnySpec{}
+}
+
+func (cas *CronAnySpec) Match(u uint8) bool {
+	return true
+}
+
+type CronExactSpec struct {
+	value uint8
+}
+
+func NewCronExactSpec(v uint8) *CronExactSpec {
+	return &CronExactSpec{
+		value: v,
+	}
+}
+
+func (ces *CronExactSpec) Match(u uint8) bool {
+	return u == ces.value
+}
+
+type CronMultiOccurrenceSpec struct {
+	values []uint8
+}
+
+func NewCronMultiOccurrenceSpec(v ...uint8) *CronMultiOccurrenceSpec {
+	retval := &CronMultiOccurrenceSpec{}
+	if len(v) > 0 {
+		retval.values = make([]uint8, len(v))
+		copy(retval.values, v)
+	}
+
+	return retval
+}
+
+func (cms *CronMultiOccurrenceSpec) Match(u uint8) bool {
+	for _, v := range cms.values {
+		if v == u {
+			return true
+		}
+	}
+
+	return false
+}
+
+type CronTask struct {
+	CronSchedule
+	userGroup
+	cronScheduleString string
+	name               string
+	command            []string
+	cmdLine            []string
+	environ            []string
+	setsid             bool
+	workingDir         string
+	lastRun            time.Time
+	hasRun             bool //NOTE: make sure initialised as false
+	config             config
+}
+
+func NewCronTask(name string) *CronTask {
+	return &CronTask{
+		name:   name,
+		hasRun: false,
+	}
+}
+
+func (c *CronTask) SetCommand(cmds ...string) *CronTask {
+	c.command = make([]string, len(cmds))
+	copy(c.command, cmds)
+	return c
+}
+
+func (c *CronTask) SetEnv(envs ...string) *CronTask {
+	c.environ = make([]string, len(envs))
+	copy(c.environ, envs)
+	return c
+}
+
+func (c *CronTask) SetFlagSetsid(flag bool) *CronTask {
+	c.setsid = flag
+	return c
+}
+
+func (c *CronTask) SetWorkingDir(path string) *CronTask {
+	c.workingDir = path
+	return c
+}
+
+func (c *CronTask) SetUser(user string) *CronTask {
+	c.user = user
+	return c
+}
+
+func (c *CronTask) SetGroup(group string) *CronTask {
+	c.group = group
+	return c
+}
+
+func (c *CronTask) SetSchedule(scheduleStr string, schedule CronSchedule) *CronTask {
+	c.cronScheduleString = scheduleStr
+	c.CronSchedule = schedule
+	return c
+}
+
+func (c *CronTask) SetConfig(config config) *CronTask {
+	c.config = config
+	return c
+}
+
+func (c *CronTask) Equals(another *CronTask) bool {
+	if another == nil {
+		return false
+	}
+
+	type toCompare struct {
+		Name       string
+		Command    string
+		Arguments  []string
+		Environ    []string
+		Setsid     bool
+		UserGroup  string
+		WorkingDir string
+		Schedule   string
+	}
+
+	cmpStruct := func(p *CronTask) ([]byte, error) {
+		s := &toCompare{
+			Name:       p.Name(),
+			Command:    p.Command(),
+			Arguments:  p.Arguments(),
+			Environ:    p.Environ(),
+			Setsid:     p.Setsid(),
+			UserGroup:  p.UserGroup().String(),
+			WorkingDir: p.WorkingDir(),
+			Schedule:   p.cronScheduleString,
+		}
+
+		return json.Marshal(s)
+	}
+
+	var (
+		err                error
+		ours, theirs       []byte
+		ourHash, theirHash [sha256.Size]byte
+	)
+
+	if ours, err = cmpStruct(c); err != nil {
+		wingmate.Log().Error().Msgf("cron task equals: %+v", err)
+		return false
+	}
+	ourHash = sha256.Sum256(ours)
+
+	if theirs, err = cmpStruct(another); err != nil {
+		wingmate.Log().Error().Msgf("cron task equals: %+v", err)
+		return false
+	}
+	theirHash = sha256.Sum256(theirs)
+
+	for i := 0; i < sha256.Size; i++ {
+		if ourHash[i] != theirHash[i] {
+			return false
+		}
+	}
+
+	return true
+}
+
+func (c *CronTask) Name() string {
+	return c.name
+}
+
+func (c *CronTask) UtilDepCheck() error {
+	c.cmdLine = make([]string, 0)
+	if c.setsid || c.UserGroup().IsSet() {
+		if err := c.config.WMExecCheckVersion(); err != nil {
+			return fmt.Errorf("utility dependency check: %w", err)
+		}
+
+		c.cmdLine = append(c.cmdLine, c.config.WMExecPath())
+
+		if c.setsid {
+			c.cmdLine = append(c.cmdLine, "--setsid")
+		}
+
+		if c.UserGroup().IsSet() {
+			c.cmdLine = append(c.cmdLine, "--user", c.UserGroup().String())
+		}
+
+		c.cmdLine = append(c.cmdLine, "--")
+	}
+
+	c.cmdLine = append(c.cmdLine, c.command...)
+
+	return nil
+}
+
+func (c *CronTask) Command() string {
+	return c.cmdLine[0]
+}
+
+func (c *CronTask) Arguments() []string {
+	if len(c.cmdLine) == 1 {
+		return nil
+	}
+
+	retval := make([]string, len(c.cmdLine)-1)
+	copy(retval, c.cmdLine[1:])
+
+	return retval
+}
+
+func (c *CronTask) EnvLen() int {
+	return len(c.environ)
+}
+
+func (c *CronTask) Environ() []string {
+	retval := make([]string, len(c.environ))
+	copy(retval, c.environ)
+	return retval
+}
+
+func (c *CronTask) Setsid() bool {
+	return c.setsid
+}
+
+func (c *CronTask) UserGroup() wminit.UserGroup {
+	return &(c.userGroup)
+}
+
+func (c *CronTask) WorkingDir() string {
+	return c.workingDir
+}
+
+func (c *CronTask) Status() wminit.TaskStatus {
+	//TODO: implement me!
+	panic("not implemented")
+	return nil
+}
+
+func (c *CronTask) TimeToRun(now time.Time) bool {
+	if c.Minute.Match(uint8(now.Minute())) &&
+		c.Hour.Match(uint8(now.Hour())) &&
+		c.DoM.Match(uint8(now.Day())) &&
+		c.Month.Match(uint8(now.Month())) &&
+		c.DoW.Match(uint8(now.Weekday())) {
+
+		if c.hasRun {
+			if now.Sub(c.lastRun) <= time.Minute && now.Minute() == c.lastRun.Minute() {
+				return false
+			} else {
+				c.lastRun = now
+				return true
+			}
+		} else {
+			c.lastRun = now
+			c.hasRun = true
+			return true
+		}
+	}
+
+	return false
+}

task/task.go

@@ -0,0 +1,374 @@
+package task
+
+import (
+	"crypto/sha256"
+	"encoding/json"
+	"fmt"
+
+	"gitea.suyono.dev/suyono/wingmate"
+
+	wminit "gitea.suyono.dev/suyono/wingmate/init"
+)
+
+type config interface {
+	WMPidProxyPath() string
+	WMPidProxyCheckVersion() error
+	WMExecPath() string
+	WMExecCheckVersion() error
+}
+
+type Tasks struct {
+	services []wminit.ServiceTask
+	crones   []wminit.CronTask
+}
+
+func NewTasks() *Tasks {
+	return &Tasks{
+		services: make([]wminit.ServiceTask, 0),
+		crones:   make([]wminit.CronTask, 0),
+	}
+}
+
+func (ts *Tasks) AddV0Service(path string) {
+	ts.AddService(NewServiceTask(path)).SetCommand(path)
+}
+
+func (ts *Tasks) AddService(serviceTask *ServiceTask) *ServiceTask {
+	ts.services = append(ts.services, serviceTask)
+	return serviceTask
+}
+
+func (ts *Tasks) AddV0Cron(schedule CronSchedule, path string) {
+	ts.AddCron(NewCronTask(path)).SetCommand(path).SetSchedule("", schedule)
+}
+
+func (ts *Tasks) AddCron(cronTask *CronTask) *CronTask {
+	ts.crones = append(ts.crones, cronTask)
+	return cronTask
+}
+
+func (ts *Tasks) List() []wminit.Task {
+	retval := make([]wminit.Task, 0, len(ts.services)+len(ts.crones))
+	for _, s := range ts.services {
+		retval = append(retval, s.(wminit.Task))
+	}
+	for _, c := range ts.crones {
+		retval = append(retval, c.(wminit.Task))
+	}
+	return retval
+}
+
+func (ts *Tasks) Services() []wminit.ServiceTask {
+	return ts.services
+}
+
+func (ts *Tasks) Crones() []wminit.CronTask {
+	return ts.crones
+}
+
+func (ts *Tasks) Get(name string) (wminit.Task, error) {
+	//TODO: implement me!
+	panic("not implemented")
+	return nil, nil
+}
+
+type ServiceTask struct {
+	name       string
+	command    []string
+	cmdLine    []string
+	environ    []string
+	setsid     bool
+	background bool
+	workingDir string
+	startSecs  uint
+	pidFile    string
+	config     config
+	userGroup
+}
+
+func NewServiceTask(name string) *ServiceTask {
+	return &ServiceTask{
+		name: name,
+	}
+}
+
+func (t *ServiceTask) SetCommand(cmds ...string) *ServiceTask {
+	t.command = make([]string, len(cmds))
+	copy(t.command, cmds)
+	return t
+}
+
+func (t *ServiceTask) SetEnv(envs ...string) *ServiceTask {
+	t.environ = make([]string, len(envs))
+	copy(t.environ, envs)
+	return t
+}
+
+func (t *ServiceTask) SetFlagSetsid(flag bool) *ServiceTask {
+	t.setsid = flag
+	return t
+}
+
+func (t *ServiceTask) SetWorkingDir(path string) *ServiceTask {
+	t.workingDir = path
+	return t
+}
+
+func (t *ServiceTask) SetUser(user string) *ServiceTask {
+	t.user = user
+	return t
+}
+
+func (t *ServiceTask) SetGroup(group string) *ServiceTask {
+	t.group = group
+	return t
+}
+
+func (t *ServiceTask) SetStartSecs(secs uint) *ServiceTask {
+	t.startSecs = secs
+	return t
+}
+
+func (t *ServiceTask) SetPidFile(path string) *ServiceTask {
+	t.pidFile = path
+	if len(path) > 0 {
+		t.background = true
+	} else {
+		t.background = false
+	}
+	return t
+}
+
+func (t *ServiceTask) SetConfig(config config) *ServiceTask {
+	t.config = config
+	return t
+}
+
+func (t *ServiceTask) Equals(another *ServiceTask) bool {
+	if another == nil {
+		return false
+	}
+
+	type toCompare struct {
+		Name        string
+		Command     string
+		Arguments   []string
+		Environ     []string
+		Setsid      bool
+		UserGroup   string
+		WorkingDir  string
+		PidFile     string
+		StartSecs   uint
+		AutoStart   bool
+		AutoRestart bool
+	}
+
+	cmpStruct := func(p *ServiceTask) ([]byte, error) {
+		s := &toCompare{
+			Name:        p.Name(),
+			Command:     p.Command(),
+			Arguments:   p.Arguments(),
+			Environ:     p.Environ(),
+			Setsid:      p.Setsid(),
+			UserGroup:   p.UserGroup().String(),
+			WorkingDir:  p.WorkingDir(),
+			PidFile:     p.PidFile(),
+			StartSecs:   p.StartSecs(),
+			AutoStart:   p.AutoStart(),
+			AutoRestart: p.AutoRestart(),
+		}
+
+		return json.Marshal(s)
+	}
+
+	var (
+		err                error
+		ours, theirs       []byte
+		ourHash, theirHash [sha256.Size]byte
+	)
+
+	if ours, err = cmpStruct(t); err != nil {
+		wingmate.Log().Error().Msgf("task equals: %+v", err)
+		return false
+	}
+	ourHash = sha256.Sum256(ours)
+
+	if theirs, err = cmpStruct(another); err != nil {
+		wingmate.Log().Error().Msgf("task equals: %+v", err)
+		return false
+	}
+	theirHash = sha256.Sum256(theirs)
+
+	for i := 0; i < sha256.Size; i++ {
+		if ourHash[i] != theirHash[i] {
+			return false
+		}
+	}
+
+	return true
+}
+
+func (t *ServiceTask) Validate() error {
+	// call this function for validate the field
+	return validate( /* input the validators here */ )
+}
+
+func (t *ServiceTask) Name() string {
+	return t.name
+}
+
+func (t *ServiceTask) prepareCommandLine() []string {
+	if len(t.cmdLine) > 0 {
+		return t.cmdLine
+	}
+
+	t.cmdLine = make([]string, 0)
+	if t.background {
+		t.cmdLine = append(t.cmdLine, t.config.WMPidProxyPath(), "--pid-file", t.pidFile, "--")
+	}
+
+	if t.setsid || t.UserGroup().IsSet() {
+		t.cmdLine = append(t.cmdLine, t.config.WMExecPath())
+
+		if t.setsid {
+			t.cmdLine = append(t.cmdLine, "--setsid")
+		}
+
+		if t.UserGroup().IsSet() {
+			t.cmdLine = append(t.cmdLine, "--user", t.UserGroup().String())
+		}
+
+		t.cmdLine = append(t.cmdLine, "--")
+	}
+
+	t.cmdLine = append(t.cmdLine, t.command...)
+
+	return t.cmdLine
+}
+
+func (t *ServiceTask) UtilDepCheck() error {
+	t.cmdLine = make([]string, 0)
+	if t.background {
+		if err := t.config.WMPidProxyCheckVersion(); err != nil {
+			return fmt.Errorf("utility dependency check: %w", err)
+		}
+
+		t.cmdLine = append(t.cmdLine, t.config.WMPidProxyPath(), "--pid-file", t.pidFile, "--")
+	}
+
+	if t.setsid || t.UserGroup().IsSet() {
+		if err := t.config.WMExecCheckVersion(); err != nil {
+			return fmt.Errorf("utility dependency check: %w", err)
+		}
+
+		t.cmdLine = append(t.cmdLine, t.config.WMExecPath())
+
+		if t.setsid {
+			t.cmdLine = append(t.cmdLine, "--setsid")
+		}
+
+		if t.UserGroup().IsSet() {
+			t.cmdLine = append(t.cmdLine, "--user", t.UserGroup().String())
+		}
+
+		t.cmdLine = append(t.cmdLine, "--")
+	}
+
+	t.cmdLine = append(t.cmdLine, t.command...)
+
+	return nil
+}
+
+func (t *ServiceTask) Command() string {
+	return t.cmdLine[0]
+}
+
+func (t *ServiceTask) Arguments() []string {
+	if len(t.cmdLine) == 1 {
+		return nil
+	}
+
+	retval := make([]string, len(t.cmdLine)-1)
+	copy(retval, t.cmdLine[1:])
+
+	return retval
+}
+
+func (t *ServiceTask) EnvLen() int {
+	return len(t.environ)
+}
+
+func (t *ServiceTask) Environ() []string {
+	retval := make([]string, len(t.environ))
+	copy(retval, t.environ)
+	return retval
+}
+
+func (t *ServiceTask) Setsid() bool {
+	return t.setsid
+}
+
+func (t *ServiceTask) UserGroup() wminit.UserGroup {
+	return &(t.userGroup)
+}
+
+func (t *ServiceTask) Background() bool {
+	return t.background
+}
+
+func (t *ServiceTask) WorkingDir() string {
+	return t.workingDir
+}
+
+func (t *ServiceTask) Status() wminit.TaskStatus {
+	//TODO: implement me!
+	panic("not implemented")
+	return nil
+}
+
+func (t *ServiceTask) AutoStart() bool {
+	//TODO: implement me!
+	panic("not implemented")
+	return false
+}
+
+func (t *ServiceTask) AutoRestart() bool {
+	//TODO: implement me!
+	panic("not implemented")
+	return false
+}
+
+func (t *ServiceTask) StartSecs() uint {
+	return t.startSecs
+}
+
+func (t *ServiceTask) PidFile() string {
+	return t.pidFile
+}
+
+type userGroup struct {
+	user  string
+	group string
+}
+
+func (ug *userGroup) IsSet() bool {
+	return len(ug.user) > 0 || len(ug.group) > 0
+}
+
+func (ug *userGroup) String() string {
+	if len(ug.group) > 0 {
+		return fmt.Sprintf("%s:%s", ug.user, ug.group)
+	}
+
+	return ug.user
+}
+
+func validate(validators ...func() error) error {
+	var err error
+	for _, v := range validators {
+		if err = v(); err != nil {
+			return err
+		}
+	}
+	return nil
+}

task/task_test.go

@@ -0,0 +1,79 @@
+package task
+
+import (
+	wminit "gitea.suyono.dev/suyono/wingmate/init"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestServicesV0(t *testing.T) {
+	service := "/path/to/executable"
+	tasks := NewTasks()
+	tasks.AddV0Service(service)
+
+	assert.Equal(t, tasks.Services()[0].Name(), service)
+	assert.ElementsMatch(t, tasks.Services()[0].Command(), []string{service})
+}
+
+func TestCronV0(t *testing.T) {
+	cron := "/path/to/executable"
+	tasks := NewTasks()
+	tasks.AddV0Cron(CronSchedule{
+		Minute: NewCronAnySpec(),
+		Hour:   NewCronAnySpec(),
+		DoM:    NewCronAnySpec(),
+		Month:  NewCronAnySpec(),
+		DoW:    NewCronAnySpec(),
+	}, cron)
+
+	assert.Equal(t, tasks.Crones()[0].Name(), cron)
+	assert.ElementsMatch(t, tasks.Crones()[0].Command(), []string{cron})
+}
+
+func TestTasks_List(t *testing.T) {
+	tasks := NewTasks()
+	tasks.services = []wminit.ServiceTask{
+		&ServiceTask{
+			name:    "one",
+			command: []string{"/path/to/executable"},
+		},
+		&ServiceTask{
+			name:    "two",
+			command: []string{"/path/to/executable"},
+		},
+	}
+	tasks.crones = []wminit.CronTask{
+		&CronTask{
+			CronSchedule: CronSchedule{
+				Minute: NewCronAnySpec(),
+				Hour:   NewCronAnySpec(),
+				DoM:    NewCronAnySpec(),
+				Month:  NewCronAnySpec(),
+				DoW:    NewCronAnySpec(),
+			},
+			name:    "cron-one",
+			command: []string{"/path/to/executable"},
+		},
+		&CronTask{
+			CronSchedule: CronSchedule{
+				Minute: NewCronAnySpec(),
+				Hour:   NewCronAnySpec(),
+				DoM:    NewCronAnySpec(),
+				Month:  NewCronAnySpec(),
+				DoW:    NewCronAnySpec(),
+			},
+			name:    "cron-two",
+			command: []string{"/path/to/executable"},
+		},
+	}
+
+	tl := tasks.List()
+	tnames := make([]string, 0)
+	testNames := []string{"one", "two", "cron-one", "cron-two"}
+
+	for _, ti := range tl {
+		tnames = append(tnames, ti.Name())
+	}
+
+	assert.ElementsMatch(t, testNames, tnames)
+}

types.go

@@ -6,4 +6,6 @@ const (
 	Any CronTimeType = iota
 	Exact
 	MultipleOccurrence
+
+	EnvPrefix = "WINGMATE"
 )

wingmate.yaml.md

@@ -0,0 +1,183 @@
+YAML Configuration
+---
+
+Table of content
+- [Service](#service)
+  - [Command](#command)
+  - [Environ](#environ)
+  - [User and Group](#user-and-group)
+  - [Working Directory](#working-directory)
+  - [setsid](#setsid)
+  - [PID File](#pid-file)
+- [Cron](#cron)
+  - [Schedule](#schedule)
+
+Example
+```yaml
+service:
+  spawner:
+    command: [ wmspawner ]
+    user: "1200"
+    working_dir: "/var/run/test"
+
+  bgtest:
+    command:
+      - "wmstarter"
+      - "--no-wait"
+      - "--"
+      - "wmexec"
+      - "--setsid"
+      - "--"
+      - "wmbg"
+      - "--name"
+      - "test-run"
+      - "--pause"
+      - "10"
+      - "--log-path"
+      - "/var/log/wmbg.log"
+      - "--pid-file"
+      - "/var/run/wmbg.pid"
+    pidfile: "/var/run/wmbg.pid"
+
+cron:
+  cron1:
+    command: ["wmoneshot", "--", "sleep", "5"]
+    schedule: "*/5 * * * *"
+    working_dir: "/var/run/cron"
+    environ:
+      - "WINGMATE_LOG=/var/log/cron1.log"
+      - "WINGMATE_LOG_MESSAGE=cron executed in minute 5,10,15,20,25,30,35,40,45,50,55"
+  cron2:
+    command: ["wmoneshot", "--", "sleep", "5"]
+    schedule: "17,42 */2 * * *"
+    environ:
+      - "WINGMATE_LOG=/var/log/cron2.log"
+      - "WINGMATE_LOG_MESSAGE=cron scheduled using 17,42 */2 * * *"
+  cron3:
+    command:
+      - "wmoneshot"
+      - "--"
+      - "sleep"
+      - "5"
+    schedule: "7,19,23,47 22 * * *"
+    environ:
+      - "WINGMATE_LOG=/var/log/cron3.log"
+      - "WINGMATE_LOG_MESSAGE=cron scheduled using 7,19,23,47 22 * * *"
+
+```
+
+At the top-level, there are two possible entries: Service and Cron.
+
+## Service
+
+`service` is a top-level element that hosts the definition of services to be started by `wingmate`.
+
+Example
+```yaml
+service:
+  svc1:
+    command: [ some_executable ]
+    user: "1200"
+    working_dir: "/var/run/test"
+```
+
+In the example above, we declare a service called `svc1`. `wingmate` will start a process based on all
+elements defined under `svc1`. To learn more about elements for a service, read below.
+
+### Command
+
+`command` element is an array of strings consists of an executable name (optionally with path) and
+its arguments (if any). `wingmate` will start the service as its child process by executing
+the executable with its arguments.
+
+Example
+
+```yaml
+command: [ executable1, argument1, argument2 ]
+```
+
+Based on YAML standard, the above example can also be written like
+
+```yaml
+command:
+  - executable1
+  - argument1
+  - argument2
+```
+
+### Environ
+
+`environ` element is an array of strings. It is a list of environment variables `wingmate` will pass to
+the child process or service. The format of each environment variable is a pair of key and value separated
+by `=` sign. By default, the child process or service will inherit all environment variables of its parent.
+
+Example
+
+```yaml
+environ:
+  - "S3_BUCKET=YOURS3BUCKET"
+  - "SECRET_KEY=YOUR_SECRET_KEY"
+```
+
+Note: don't worry if an environment variable value has one or more `=` character(s) in it. `wingmate` will
+separate key and value using the first `=` character only.
+
+### Working Directory
+
+`working_dir` is a string contains the path where the child process will be running in. By default, the child
+process will run in the `wingmate` current directory.
+
+### User and Group
+
+Both `user` and `group` take string value. `user` and `group` refer to the operating system's user and group.
+They can be in the form of name, like username or groupname, or in the form of id, like uid or gid.
+If they are set, the child process will run as the specified user and group. By default, the child process
+will run as the same user and group as the `wingmate` process. The `user` and `group` are only effective
+when the `wingmate` running as privileged user, such as `root`. The `user` and `group` configuration depends
+on the [wmexec](README.md#wingmate-exec-binary).
+
+### setsid
+
+`setsid` takes a boolean value, `true` or `false`. This feature is operating system dependant. If set to `true`,
+the child process will run in a new session. Read `man setsid` on Linux/UNIX. The `setsid` configuration depends
+on the [wmexec](README.md#wingmate-exec-binary).
+
+### PID File
+
+This feature is designated to handle service that run in the background. This kind of service usually forks a
+new process, terminate the parent process, and continue running in the background child process. It writes its
+background process PID in a file. This file is referred as PID file. Put the path of the PID file to this
+`pidfile` element. It will help `wingmate` to restart the service if its process exited / terminated. The `pidfile`
+configuration depends on the [wmpidproxy](README.md#wingmate-pid-proxy-binary).
+
+## Cron
+
+`cron` is a top-level element that hosts the definition of crones to run by `wingmate` on the specified schedule.
+Cron shares almost all configuration elements with Service, except `schedule` and `pidfile`. For the following
+elements, please refer to the [Service](#service) section
+
+- [Command](#command)
+- [Environ](#environ)
+- [Working Directory](#working-directory)
+- [setsid](#setsid)
+- [User and Group](#user-and-group)
+
+`pidfile` is an invalid config parameter for cron because `wingmate` cannot start cron in background mode. This
+limitation is intentionally built into `wingmate` because it doesn't make any sense to run a periodic cron process
+in background.
+
+### Schedule
+
+The schedule configuration field uses a format similar to the one described in the [README.md](README.md).
+
+```shell
+ ┌───────────── minute (0–59)
+ │ ┌───────────── hour (0–23)
+ │ │ ┌───────────── day of the month (1–31)
+ │ │ │ ┌───────────── month (1–12)
+ │ │ │ │ ┌───────────── day of the week (0–6) (Sunday to Saturday)
+ │ │ │ │ │ 
+ │ │ │ │ │
+ │ │ │ │ │
+ * * * * *
+```