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Fall back to Go module build info when version isn't set via ldflags #443

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Fall back to Go module build info when version isn't set via ldflags #443

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31 changes: 30 additions & 1 deletion easyjson/main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@ import (
"fmt"
"os"
"path/filepath"
"runtime/debug"
"strings"

"github.com/mailru/easyjson/bootstrap"
Expand Down Expand Up @@ -107,7 +108,8 @@ func main() {
files := flag.Args()

if *showVersion {
fmt.Printf("easyjson generator\nversion: %s\ncommit: %s\n", Version, Commit)
version, commit := versionInfo()
fmt.Printf("easyjson generator\nversion: %s\ncommit: %s\n", version, commit)
os.Exit(0)
}

Expand All @@ -130,3 +132,30 @@ func main() {
}
}
}

func versionInfo() (version, commit string) {
version, commit = Version, Commit

info, ok := debug.ReadBuildInfo()
if !ok {
return version, commit
}

if version == "dev" && info.Main.Version != "" && info.Main.Version != "(devel)" {
version = info.Main.Version
}

if commit == "none" {
for _, s := range info.Settings {
if s.Key == "vcs.revision" {
commit = s.Value
if len(commit) > 7 {
commit = commit[:7]
}
break
}
}
}

return version, commit
}
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