From 9271f6595be6734763aaf4b7923f8f1b7a6cc559 Mon Sep 17 00:00:00 2001
From: Miek Gieben <miek@miek.nl>
Date: Wed, 6 Dec 2017 09:46:54 +0000
Subject: [PATCH] Add semver (#595)

Add a version.go that has the semver version of this libary; now at
1.0.0. Use a struct so external code can easily check the for the
version without resulting to string parsing. Add String() function if
you want to access the version string.

Use simple Makefile.release to kick off a new release:

% edit version.go
% make -f Makefile.release

will tag and push according to version, if version is 1.0.0 the tag
in git will be v1.0.0
---
 Makefile.release | 51 ++++++++++++++++++++++++++++++++++++++++++++++++
 version.go       | 15 ++++++++++++++
 version_test.go  | 10 ++++++++++
 3 files changed, 76 insertions(+)
 create mode 100644 Makefile.release
 create mode 100644 version.go
 create mode 100644 version_test.go

diff --git a/Makefile.release b/Makefile.release
new file mode 100644
index 00000000..4069eb08
--- /dev/null
+++ b/Makefile.release
@@ -0,0 +1,51 @@
+# Makefile for releasing.
+#
+# The release is controlled from version.go. The version found there is
+# used to tag the git repo, we're not building any artifects so there is nothing
+# to upload to github.
+#
+# * Up the version in version.go
+# * Run: make -f Makefile.release release
+#   * will *commit* your change with 'Release $VERSION'
+#   * push to github
+#
+
+define GO
+//+build ignore
+
+package main
+
+import (
+	"fmt"
+
+	"github.com/miekg/dns"
+)
+
+func main() {
+	fmt.Println(dns.Version.String())
+}
+endef
+
+$(file > version_release.go,$(GO))
+VERSION:=$(shell go run version_release.go)
+TAG="v$(VERSION)"
+
+all:
+	@echo Use the \'release\' target to start a release $(VERSION)
+	rm -f version_release.go
+
+.PHONY: release
+release: commit push
+	@echo Released $(VERSION)
+	rm -f version_release.go
+
+.PHONY: commit
+commit:
+	@echo Committing release $(VERSION)
+	git commit -am"Release $(VERSION)"
+	git tag $(TAG)
+
+.PHONY: push
+push:
+	@echo Pushing release $(VERSION) to master
+	git push --tags
diff --git a/version.go b/version.go
new file mode 100644
index 00000000..4e60c7fd
--- /dev/null
+++ b/version.go
@@ -0,0 +1,15 @@
+package dns
+
+import "fmt"
+
+// Version is current version of this library.
+var Version = V{1, 0, 0}
+
+// V holds the version of this library.
+type V struct {
+	Major, Minor, Patch int
+}
+
+func (v V) String() string {
+	return fmt.Sprintf("%d.%d.%d", v.Major, v.Minor, v.Patch)
+}
diff --git a/version_test.go b/version_test.go
new file mode 100644
index 00000000..61c40484
--- /dev/null
+++ b/version_test.go
@@ -0,0 +1,10 @@
+package dns
+
+import "testing"
+
+func TestVersion(t *testing.T) {
+	v := V{1, 0, 0}
+	if x := v.String(); x != "1.0.0" {
+		t.Fatalf("Failed to convert version %v, got: %s", v, x)
+	}
+}