/
version.go
68 lines (58 loc) · 1.96 KB
/
version.go
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package cobrautil
import (
"fmt"
"runtime"
"runtime/debug"
"strings"
"github.com/jzelinskie/stringz"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
)
func vcsRevision(bi *debug.BuildInfo) string {
for _, setting := range bi.Settings {
if setting.Key == "vcs.revision" {
return setting.Value
}
}
return ""
}
// Version is variable that holds program's version string.
// This should be set with the follow flags to the `go build` command:
// -ldflags '-X github.com/jzelinskie/cobrautil.Version=$YOUR_VERSION_HERE'
var Version string
// UsageVersion introspects the process debug data for Go modules to return a
// version string.
func UsageVersion(programName string, includeDeps bool) string {
bi, ok := debug.ReadBuildInfo()
if !ok {
panic("failed to read BuildInfo because the program was compiled with Go " + runtime.Version())
}
// The version wasn't set by ldflags, so fallback to the VCS revision, and
// finally Go module version.
Version = stringz.DefaultEmpty(stringz.DefaultEmpty(Version, vcsRevision(bi)), bi.Main.Version)
if !includeDeps {
if Version == "(devel)" {
return fmt.Sprintf("%s development build (unknown exact version)", programName)
}
return fmt.Sprintf("%s %s", programName, Version)
}
var b strings.Builder
fmt.Fprintf(&b, "%s %s", bi.Path, Version)
for _, dep := range bi.Deps {
fmt.Fprintf(&b, "\n\t%s %s", dep.Path, dep.Version)
}
return b.String()
}
// RegisterVersionFlags registers the flags used for the VersionRunFunc.
func RegisterVersionFlags(flags *pflag.FlagSet) {
flags.Bool("include-deps", false, "include dependencies' versions")
}
// VersionRunFunc provides a generic implementation of a version command that
// reads its values from ldflags and the internal Go module data stored in a
// binary.
func VersionRunFunc(programName string) CobraRunFunc {
return func(cmd *cobra.Command, args []string) error {
_, err := fmt.Println(UsageVersion(programName, MustGetBool(cmd, "include-deps")))
return err
}
}