factor out code from git.go

pkg/commands/status.go

@@ -0,0 +1,48 @@
+package commands
+
+import (
+	"path/filepath"
+
+	gogit "github.com/go-git/go-git/v5"
+)
+
+// RebaseMode returns "" for non-rebase mode, "normal" for normal rebase
+// and "interactive" for interactive rebase
+func (c *GitCommand) RebaseMode() (string, error) {
+	exists, err := c.OSCommand.FileExists(filepath.Join(c.DotGitDir, "rebase-apply"))
+	if err != nil {
+		return "", err
+	}
+	if exists {
+		return "normal", nil
+	}
+	exists, err = c.OSCommand.FileExists(filepath.Join(c.DotGitDir, "rebase-merge"))
+	if exists {
+		return "interactive", err
+	} else {
+		return "", err
+	}
+}
+
+func (c *GitCommand) WorkingTreeState() string {
+	rebaseMode, _ := c.RebaseMode()
+	if rebaseMode != "" {
+		return "rebasing"
+	}
+	merging, _ := c.IsInMergeState()
+	if merging {
+		return "merging"
+	}
+	return "normal"
+}
+
+// IsInMergeState states whether we are still mid-merge
+func (c *GitCommand) IsInMergeState() (bool, error) {
+	return c.OSCommand.FileExists(filepath.Join(c.DotGitDir, "MERGE_HEAD"))
+}
+
+func (c *GitCommand) IsBareRepo() bool {
+	// note: could use `git rev-parse --is-bare-repository` if we wanna drop go-git
+	_, err := c.Repo.Worktree()
+	return err == gogit.ErrIsBareRepository
+}