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package main
import (
"errors"
"fmt"
"runtime/debug"
"strings"
"github.com/git-bug/git-bug/commands"
"golang.org/x/mod/semver"
)
var (
version = "undefined"
)
// getVersion returns a string representing the version information defined when
// the binary was built, or a sane default indicating a local build. a string is
// always returned. an error may be returned along with the string in the event
// that we detect a local build but are unable to get build metadata.
//
// TODO: support validation of the version (that it's a real version)
// TODO: support notifying the user if their version is out of date
func getVersion() (string, error) {
var arch string
var commit string
var modified bool
var platform string
var v strings.Builder
// this supports overriding the default version if the deprecated var used
// for setting the exact version for releases is supplied. we are doing this
// in order to give downstream package maintainers a longer window to
// migrate.
//
// TODO: 0.12.0: remove support for old build tags
if version == "undefined" && commands.GitExactTag != "" {
version = commands.GitExactTag
}
// automatically add the v prefix if it's missing
if version != "undefined" && !strings.HasPrefix(version, "v") {
version = fmt.Sprintf("v%s", version)
}
// reset the version string to undefined if it is invalid
if ok := semver.IsValid(version); !ok {
version = "undefined"
}
v.WriteString(version)
info, ok := debug.ReadBuildInfo()
if !ok {
v.WriteString(fmt.Sprintf(" (no build info)\n"))
return v.String(), errors.New("unable to read build metadata")
}
for _, kv := range info.Settings {
switch kv.Key {
case "GOOS":
platform = kv.Value
case "GOARCH":
arch = kv.Value
case "vcs.modified":
if kv.Value == "true" {
modified = true
}
case "vcs.revision":
commit = kv.Value
}
}
if commit != "" {
v.WriteString(fmt.Sprintf(" %.12s", commit))
}
if modified {
v.WriteString("/dirty")
}
v.WriteString(fmt.Sprintf(" %s", info.GoVersion))
if platform != "" {
v.WriteString(fmt.Sprintf(" %s", platform))
}
if arch != "" {
v.WriteString(fmt.Sprintf(" %s", arch))
}
return fmt.Sprint(v.String(), "\n"), nil
}
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