feat: debug logging

Closes coop-cloud/organising#164.

pkg/git/clone.go

@@ -0,0 +1,33 @@
+package git
+
+import (
+	"os"
+
+	"github.com/go-git/go-git/v5"
+	"github.com/go-git/go-git/v5/plumbing"
+	"github.com/sirupsen/logrus"
+)
+
+// Clone runs a git clone which accounts for different default branches.
+func Clone(dir, url string) error {
+	if _, err := os.Stat(dir); os.IsNotExist(err) {
+		logrus.Debugf("'%s' does not exist, attempting to git clone from '%s'", dir, url)
+		_, err := git.PlainClone(dir, false, &git.CloneOptions{URL: url, Tags: git.AllTags})
+		if err != nil {
+			logrus.Debugf("cloning from default branch failed, attempting from main branch")
+			// try with main branch because Git is being a Git
+			_, err := git.PlainClone(dir, false, &git.CloneOptions{
+				URL:           url,
+				Tags:          git.AllTags,
+				ReferenceName: plumbing.ReferenceName("refs/heads/main"),
+			})
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	logrus.Debugf("'%s' has been git cloned successfully", dir)
+
+	return nil
+}