Backport sha-in-user-agent from git-lfs#536 to release-0.5

Author: technoweenie

git-lfs.go

@@ -7,6 +7,5 @@ import (
 
 func main() {
 	commands.Run()
-
 	lfs.LogHttpStats()
 }

lfs/lfs.go

@@ -11,12 +11,8 @@ import (
 	"github.com/github/git-lfs/vendor/_nuts/github.com/rubyist/tracerx"
 )
 
-const Version = "0.5.3"
-
-//
-// Setup permissions for the given directories used here.
-//
 const (
+	Version            = "0.5.3"
 	tempDirPerms       = 0755
 	localMediaDirPerms = 0755
 	localLogDirPerms   = 0755
@@ -25,6 +21,7 @@ const (
 var (
 	LargeSizeThreshold = 5 * 1024 * 1024
 	TempDir            = filepath.Join(os.TempDir(), "git-lfs")
+	GitCommit          string
 	UserAgent          string
 	LocalWorkingDir    string
 	LocalGitDir        string
@@ -108,10 +105,17 @@ func init() {
 
 	}
 
-	UserAgent = fmt.Sprintf("git-lfs/%s (GitHub; %s %s; go %s)", Version,
+	gitCommit := ""
+	if len(GitCommit) > 0 {
+		gitCommit = "; git " + GitCommit
+	}
+	UserAgent = fmt.Sprintf("git-lfs/%s (GitHub; %s %s; go %s%s)",
+		Version,
 		runtime.GOOS,
 		runtime.GOARCH,
-		strings.Replace(runtime.Version(), "go", "", 1))
+		strings.Replace(runtime.Version(), "go", "", 1),
+		gitCommit,
+	)
 }
 
 func resolveGitDir() (string, string, error) {

script/build.go

@@ -25,26 +25,26 @@ var (
 		"windows": "Windows",
 		"amd64":   "AMD64",
 	}
+	LdFlag string
 )
 
 func mainBuild() {
-	cmd, err := exec.Command("script/fmt").Output()
+	if *ShowHelp {
+		fmt.Println("usage: script/bootstrap [-os] [-arch] [-all]")
+		flag.PrintDefaults()
+		return
+	}
+
+	cmd, err := exec.Command("git", "rev-parse", "--short", "HEAD").Output()
 	if err != nil {
 		panic(err)
 	}
 
 	if len(cmd) > 0 {
-		fmt.Println(string(cmd))
-	}
-
-	if *ShowHelp {
-		fmt.Println("usage: script/bootstrap [-os] [-arch] [-all]")
-		flag.PrintDefaults()
-		return
+		LdFlag = strings.TrimSpace("-X github.com/github/git-lfs/lfs.GitCommit " + string(cmd))
 	}
 
 	buildMatrix := make(map[string]Release)
-
 	errored := false
 
 	if *BuildAll {
@@ -128,7 +128,14 @@ func buildCommand(dir, buildos, buildarch string) error {
 		bin = bin + ".exe"
 	}
 
-	cmd := exec.Command("go", "build", "-o", bin, ".")
+	args := make([]string, 1, 6)
+	args[0] = "build"
+	if len(LdFlag) > 0 {
+		args = append(args, "-ldflags", LdFlag)
+	}
+	args = append(args, "-o", bin, ".")
+
+	cmd := exec.Command("go", args...)
 	if addenv {
 		cmd.Env = []string{
 			"GOOS=" + buildos,

script/run

@@ -1,3 +1,4 @@
 #!/bin/sh
 script/fmt
-go run ./git-lfs.go "$@"
+commit=`git rev-parse --short HEAD`
+go run -ldflags="-X github.com/github/git-lfs/lfs.GitCommit $commit" ./git-lfs.go "$@"