Function _find_exe_version

Tools/c-analyzer/distutils/cygwinccompiler.py:253–272

Find the version of an executable by running `cmd` in the shell. If the command is not found, or the output does not match `RE_VERSION`, returns None.

(cmd)

RE_VERSION = re.compile(br'(\d+\.\d+(\.\d+)*)')

def _find_exe_version(cmd):
    """Find the version of an executable by running `cmd` in the shell.

    If the command is not found, or the output does not match
    `RE_VERSION`, returns None.
    """
    executable = cmd.split()[0]
    if find_executable(executable) is None:
        return None
    out = Popen(cmd, shell=True, stdout=PIPE).stdout
    try:
        out_string = out.read()
    finally:
        out.close()
    result = RE_VERSION.search(out_string)
    if result is None:
        return None
    # LooseVersion works with strings
    # so we need to decode our bytes
    return LooseVersion(result.group(1).decode())

def get_versions():
    """ Try to find out the versions of gcc, ld and dllwrap.