Ejemplo n.º 1
0
func traverseExtractTree(repo git.Repo, root *git.Tree, dir string) error {
	if _, err := os.Stat(dir); os.IsNotExist(err) {
		os.MkdirAll(dir, 0777)
	}

	for _, item := range root.Items {
		switch item.Mode & git.TREE_MODE_DIR {
		case 0:
			// this is a blob, extract it
			// open local file first
			path := filepath.Join(dir, item.Name)
			file, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE, 0666)
			if err != nil {
				return err
			}

			defer file.Close()

			// open blob
			_, obj, err := repo.OpenObject(item.Hash)
			if err != nil {
				return err
			}
			defer obj.Close()

			_, err = io.Copy(file, obj)
			if err != nil {
				return err
			}

		case git.TREE_MODE_DIR:
			// this is a tree, do a recursive extraction
			new_dir := filepath.Join(dir, item.Name)

			// load tree object
			_, obj, err := repo.OpenObject(item.Hash)
			if err != nil {
				return err
			}

			new_root, err := git.ReadTree(obj)
			if err != nil {
				return err
			}

			obj.Close()
			err = traverseExtractTree(repo, new_root, new_dir)
			if err != nil {
				return err
			}
		}
	}
	return nil
}
Ejemplo n.º 2
0
func ExtractTree(repo git.Repo, branch, build_dir string) error {
	// resolve branch
	hash, err := repo.ReadRef(branch)
	if err != nil {
		return err
	}

	if _, err := os.Stat(build_dir); os.IsNotExist(err) {
		os.MkdirAll(build_dir, 0777)
	}

	// read commit object and extract tree id from it
	_, obj, err := repo.OpenObject(hash)
	if err != nil {
		return err
	}

	defer obj.Close()

	commit, err := git.ReadCommit(obj)
	if err != nil {
		return err
	}

	treeId := commit.TreeId

	// read root tree object
	_, treeObj, err := repo.OpenObject(treeId)
	if err != nil {
		return err
	}

	defer treeObj.Close()

	root, err := git.ReadTree(treeObj)
	if err != nil {
		return err
	}

	// traverse tree from root and extract content into given directory

	err = traverseExtractTree(repo, root, build_dir)
	if err != nil {
		return err
	}

	return nil
}