WIP: feat: cancel git clone ops gracefully

See #528

pkg/git/clone.go

@@ -28,17 +28,17 @@ func gitCloneIgnoreErr(err error) bool {
 // Clone runs a git clone which accounts for different default branches.
 func Clone(dir, url string) error {
 	ctx := context.Background()
-	ctx, cancel := context.WithCancel(ctx)
+	ctx, cancelCtx := context.WithCancel(ctx)
+
+	sigIntCh := make(chan os.Signal, 1)
+	signal.Notify(sigIntCh, os.Interrupt)
+	defer func() {
+		signal.Stop(sigIntCh)
+		cancelCtx()
+	}()
 
 	errCh := make(chan error)
 
-	c := make(chan os.Signal, 1)
-	signal.Notify(c, os.Interrupt)
-	defer func() {
-		signal.Stop(c)
-		cancel()
-	}()
-
 	go func() {
 		if _, err := os.Stat(dir); os.IsNotExist(err) {
 			log.Debugf("git clone: %s", url)
@@ -88,8 +88,8 @@ func Clone(dir, url string) error {
 	}()
 
 	select {
-	case <-c:
-		cancel()
+	case <-sigIntCh:
+		cancelCtx()
 		fmt.Println() // NOTE(d1): newline after ^C
 		if err := os.RemoveAll(dir); err != nil {
 			return fmt.Errorf("unable to clean up git clone of %s: %s", dir, err)