mage: cache packages with `go install` if building for runtime.GOOS

mage.go

@@ -42,10 +42,10 @@ func shouldWork(ctx context.Context, env []string, dir string, cmdName string, a
 
 func goBuild(ctx context.Context, env []string, dir string, pkgname string) {
 	shouldWork(ctx, env, dir, "go", "build", "-v", pkgBase+pkgname)
+}
 
-	// TODO: `go install` caching of built packages
-	//shouldWork(ctx, env, dir, "go", "install", pkgBase+pkgname)
-	//shouldWork(ctx, env, dir, "go", "build", "-v", pkgBase+pkgname)
+func goInstall(ctx context.Context, env []string, pkgname string) {
+	shouldWork(ctx, nil, wd, "go", "install", pkgBase+pkgname)
 }
 
 func goBuildPlugin(ctx context.Context, dir, pkgname, fname string) {
@@ -57,23 +57,45 @@ func goBuildPlugin(ctx context.Context, dir, pkgname, fname string) {
 	shouldWork(ctx, nil, dir, "go", "build", "-buildmode=plugin", "-o=fname", pkgBase+pkgname)
 }
 
-// Build builds the binaries for route and routed.
-func Build() {
+func buildBins(goos string) {
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 
 	d := filepath.Join(wd, "./bin")
 
-	for _, goos := range []string{"linux", "darwin", "windows"} {
+	os.Mkdir(filepath.Join(d, goos), 0777)
 
-		os.Mkdir(filepath.Join(d, goos), 0777)
-		for _, pkg := range []string{"route-httpagent", "route", "routed"} {
-			goBuild(ctx, []string{"GOOS=" + goos}, filepath.Join(d, goos), "cmd/"+pkg)
-			qod.Printlnf("built binary for %s for os %s", pkg, goos)
+	for _, pkg := range []string{"route-httpagent", "route", "routed"} {
+		goBuild(ctx, []string{"GOOS=" + goos}, filepath.Join(d, goos), "cmd/"+pkg)
+
+		if goos == runtime.GOOS {
+			goInstall(ctx, nil, "cmd/"+pkg)
 		}
+
+		qod.Printlnf("built binary for %s for os %s", pkg, goos)
 	}
 }
 
+// Linux builds binaries for linux
+func Linux() {
+	buildBins("linux")
+}
+
+// Windows builds binaries for windows
+func Windows() {
+	buildBins("windows")
+}
+
+// Darwin builds binaries for darwin
+func Darwin() {
+	buildBins("darwin")
+}
+
+// Build builds the binaries for route and routed.
+func Build() {
+	buildBins(runtime.GOOS)
+}
+
 // Plugin builds all of the plugins for programs wanting to augment themselves with route.
 func Plugin() {
 	ctx, cancel := context.WithCancel(context.Background())