47 lines
1.1 KiB
Go
47 lines
1.1 KiB
Go
// Package env contains functions for dealing with environment variables
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package env
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import (
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"os"
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"os/user"
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homedir "github.com/mitchellh/go-homedir"
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)
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// ShellExpandHelp describes what ShellExpand does for inclusion into help
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const ShellExpandHelp = "\n\nLeading `~` will be expanded in the file name as will environment variables such as `${RCLONE_CONFIG_DIR}`."
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// ShellExpand replaces a leading "~" with the home directory" and
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// expands all environment variables afterwards.
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func ShellExpand(s string) string {
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if s != "" {
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if s[0] == '~' {
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newS, err := homedir.Expand(s)
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if err == nil {
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s = newS
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}
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}
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s = os.ExpandEnv(s)
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}
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return s
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}
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// CurrentUser finds the current user name or "" if not found
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func CurrentUser() (userName string) {
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userName = os.Getenv("USER")
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// If we are making docs just use $USER
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if userName == "$USER" {
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return userName
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}
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// Try reading using the OS
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usr, err := user.Current()
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if err == nil {
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return usr.Username
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}
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// Fall back to reading $USER then $LOGNAME
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if userName != "" {
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return userName
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}
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return os.Getenv("LOGNAME")
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}
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