Function chmod

src/commoncode/fileutils.py:489–517

Update permissions for `location` with with `flags`. `flags` is one of R, RW, RX or RWX with the same semantics as in the chmod command. Update is done recursively if `recurse`.

(location, flags, recurse=False)

# FIXME: This was an expensive operation that used to recurse of the parent directory
def chmod(location, flags, recurse=False):
    """
    Update permissions for `location` with with `flags`. `flags` is one of R,
    RW, RX or RWX with the same semantics as in the chmod command. Update is
    done recursively if `recurse`.
    """
    if not location or not os.path.exists(location):
        return
    location = os.path.abspath(location)

    new_flags = flags
    if filetype.is_dir(location):
        # POSIX dirs need to be executable to be readable,
        # and to be writable so we can change perms of files inside
        new_flags = RWX

    # FIXME: do we really need to change the parent directory perms?
    # FIXME: may just check them instead?
    parent = os.path.dirname(location)
    current_stat = stat.S_IMODE(os.stat(parent).st_mode)
    if not is_rwx(parent):
        os.chmod(parent, current_stat | RWX)

    if filetype.is_regular(location):
        current_stat = stat.S_IMODE(os.stat(location).st_mode)
        os.chmod(location, current_stat | new_flags)

    if recurse:
        chmod_tree(location, flags)


def chmod_tree(location, flags):