diff options
| -rw-r--r-- | buildstream/utils.py | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/buildstream/utils.py b/buildstream/utils.py index 2fe9ab7dc..4da29c259 100644 --- a/buildstream/utils.py +++ b/buildstream/utils.py @@ -1259,3 +1259,34 @@ def _message_digest(message_buffer): digest.hash = sha.hexdigest() digest.size_bytes = len(message_buffer) return digest + + +# _search_upward_for_files() +# +# Searches upwards (from directory, then directory's parent directory...) +# for any of the files listed in `filenames`. +# +# If multiple filenames are specified, and present in the same directory, +# the first filename in the list will be returned. +# +# Args: +# directory (str): The directory to begin searching for files from +# filenames (list of str): The names of files to search for +# +# Returns: +# (str): The directory a file was found in, or None +# (str): The name of the first file that was found in that directory, or None +# +def _search_upward_for_files(directory, filenames): + directory = os.path.abspath(directory) + while True: + for filename in filenames: + file_path = os.path.join(directory, filename) + if os.path.isfile(file_path): + return directory, filename + + parent_dir = os.path.dirname(directory) + if directory == parent_dir: + # i.e. we've reached the root of the filesystem + return None, None + directory = parent_dir |