WIP: feat: cancel git clone ops gracefully

See #528

pkg/git/clone_test.go

@@ -0,0 +1,37 @@
+package git
+
+import (
+	"fmt"
+	"os"
+	"path"
+	"syscall"
+	"testing"
+	"time"
+
+	"coopcloud.tech/abra/pkg/config"
+)
+
+func TestCancelGitClone(t *testing.T) {
+	dir := path.Join(config.RECIPES_DIR, "gitea")
+	os.RemoveAll(dir)
+
+	go func() {
+		time.Sleep(1 * time.Second)
+
+		p, err := os.FindProcess(os.Getpid())
+		if err != nil {
+			t.Fatalf("unable to find current process: %s", err)
+		}
+
+		p.Signal(syscall.SIGINT)
+	}()
+
+	gitURL := fmt.Sprintf("%s/%s.git", config.REPOS_BASE_URL, "gitea")
+	if err := Clone(dir, gitURL); err == nil {
+		t.Fatal("cloning should have been interrupted")
+	}
+
+	if _, err := os.Stat(dir); !os.IsNotExist(err) {
+		t.Fatal("recipe directory should have been deleted")
+	}
+}