recover ci.go xgo command

build/ci.go

@@ -24,7 +24,7 @@ Usage: go run build/ci.go <command> <command flags/arguments>
 
 Available commands are:
 
-	install    [ -arch architecture ] [ -cc compiler ] [ packages... ]                          -- builds packages and executables
+	install    [ -arch architecture ] [-static] [ -cc compiler ] [ packages... ]                -- builds packages and executables
 	test       [ -coverage ] [ packages... ]                                                    -- runs the tests
 	lint                                                                                        -- runs certain pre-selected linters
 	archive    [ -arch architecture ] [ -type zip|tar ] [ -signer key-envvar ] [ -signify key-envvar ] [ -upload dest ] -- archives build artifacts
@@ -33,6 +33,7 @@ Available commands are:
 	nsis                                                                                        -- creates a Windows NSIS installer
 	aar        [ -local ] [ -sign key-id ] [-deploy repo] [ -upload dest ]                      -- creates an Android archive
 	xcode      [ -local ] [ -sign key-id ] [-deploy repo] [ -upload dest ]                      -- creates an iOS XCode framework
+	xgo        [ -alltools ] [-static] [ options ]                                              -- cross builds according to options
 	purge      [ -store blobstore ] [ -days threshold ]                                         -- purges old archives from the blobstore
 
 For all commands, -n prevents execution of external programs (dry run mode).
@@ -186,6 +187,8 @@ func main() {
 		doAndroidArchive(os.Args[2:])
 	case "xcode":
 		doXCodeFramework(os.Args[2:])
+	case "xgo":
+		doXgo(os.Args[2:])
 	case "purge":
 		doPurge(os.Args[2:])
 	default:
@@ -1232,6 +1235,52 @@ func newPodMetadata(env build.Environment, archive string) podMetadata {
 	}
 }
 
+// Cross compilation
+
+func doXgo(cmdline []string) {
+	var (
+		alltools   = flag.Bool("alltools", false, `Flag whether we're building all known tools, or only on in particular`)
+		staticlink = flag.Bool("static", false, "Static link build with")
+	)
+	flag.CommandLine.Parse(cmdline)
+	env := build.Env()
+	var tc build.GoToolchain
+
+	// Make sure xgo is available for cross compilation
+	build.MustRun(tc.Install(GOBIN, "github.com/karalabe/xgo@latest"))
+
+	// Disable CLI markdown doc generation in release builds.
+	buildTags := []string{"urfave_cli_no_docs"}
+
+	// If all tools building is requested, build everything the builder wants
+	args := append(buildFlags(env, *staticlink, buildTags), flag.Args()...)
+
+	if *alltools {
+		args = append(args, []string{"--dest", GOBIN}...)
+		for _, res := range allToolsArchiveFiles {
+			if strings.HasPrefix(res, GOBIN) {
+				// Binary tool found, cross build it explicitly
+				args = append(args, "./"+filepath.Join("cmd", filepath.Base(res)))
+				build.MustRun(xgoTool(args))
+				args = args[:len(args)-1]
+			}
+		}
+		return
+	}
+
+	// Otherwise execute the explicit cross compilation
+	path := args[len(args)-1]
+	args = append(args[:len(args)-1], []string{"--dest", GOBIN, path}...)
+	build.MustRun(xgoTool(args))
+}
+
+func xgoTool(args []string) *exec.Cmd {
+	cmd := exec.Command(filepath.Join(GOBIN, "xgo"), args...)
+	cmd.Env = os.Environ()
+	cmd.Env = append(cmd.Env, []string{"GOBIN=" + GOBIN}...)
+	return cmd
+}
+
 // Binary distribution cleanups
 
 func doPurge(cmdline []string) {