s

gitcmd/repo.go

@@ -0,0 +1,70 @@
+package gitcmd
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+type Repository struct {
+	Path string
+	ctx  context.Context
+}
+
+func OpenRepository(ctx context.Context, repoPath string) (*Repository, error) {
+	abs, err := filepath.Abs(repoPath)
+	if err != nil {
+		return nil, err
+	}
+	if _, err := os.Stat(abs); err != nil {
+		return nil, err
+	}
+
+	if _, err := os.Stat(filepath.Join(abs, "objects")); os.IsNotExist(err) {
+		return nil, os.ErrNotExist
+	}
+	if _, err := os.Stat(filepath.Join(abs, "refs")); os.IsNotExist(err) {
+		return nil, os.ErrNotExist
+	}
+	return &Repository{Path: abs, ctx: ctx}, nil
+}
+
+func (r *Repository) Context() context.Context {
+	return r.ctx
+}
+
+func (r *Repository) WithContext(ctx context.Context) *Repository {
+	return &Repository{Path: r.Path, ctx: ctx}
+}
+
+func (r *Repository) Command(args ...string) *Command {
+	return NewCommand(args...).WithDir(r.Path)
+}
+
+func (r *Repository) IsEmpty() (bool, error) {
+	stdout, _, err := NewCommand("rev-list", "-n", "1", "--all").
+		WithDir(r.Path).
+		RunStdString(r.ctx)
+	if err != nil {
+
+		if strings.Contains(err.Error(), "exit status 1") || strings.Contains(err.Error(), "exit status 129") {
+			return true, nil
+		}
+		return false, err
+	}
+	return strings.TrimSpace(stdout) == "", nil
+}
+
+func (r *Repository) DefaultBranch() (string, error) {
+	data, err := os.ReadFile(filepath.Join(r.Path, "HEAD"))
+	if err != nil {
+		return "", err
+	}
+	const prefix = "ref: refs/heads/"
+	line := strings.TrimSpace(string(data))
+	if after, ok := strings.CutPrefix(line, prefix); ok {
+		return after, nil
+	}
+	return "", nil
+}