go-xkcdreader/cmd/version.go

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// Copyright 2022 wanderer <a_mirre at utb dot cz>
// SPDX-License-Identifier: GPL-3.0-or-later
package cmd
import (
"fmt"
"os"
"github.com/spf13/cobra"
)
// version holds app version string
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var version = "v0.0.13"
// used to determine whether to print short or long version string
var shortVersion = false
var cmdVersion = &cobra.Command{
Use: "version",
Short: "Print version information and exit",
Long: `All software has versions. This is ` + appName + `'s`,
RunE: func(cmd *cobra.Command, args []string) error {
fmt.Println(getVersion())
return nil
},
PersistentPostRun: func(cmd *cobra.Command, args []string) {
// exit with code 0 after showing the version
os.Exit(0)
},
}
// get (short if -s/--short flag is supplied) version
func getVersion() string {
if !shortVersion {
return appName + " - " + version
}
return GetShortVersion()
}
// GetShortVersion returns a bare version string
func GetShortVersion() string {
return version
}
// the init func registers the commands and flags with cobra
func init() {
cmdVersion.Flags().BoolVarP(&shortVersion, "short", "s", false, "print just the version string and nothing else")
Root.AddCommand(cmdVersion)
}