#!/usr/bin/env python3
#
# check-patch.py: run checkpatch.pl across all commits in a branch
#
# Copyright (C) 2020 Red Hat, Inc.
#
# SPDX-License-Identifier: GPL-2.0-or-later

import os
import os.path
import sys
import subprocess

namespace = "linux-bsp"
if len(sys.argv) >= 2:
    namespace = sys.argv[1]

cwd = os.getcwd()
reponame = os.path.basename(cwd)
if len(sys.argv) >= 3:
    reponame = sys.argv[2]

repourl = "https://gitlab.int.toradex.com/rd/%s/%s.git" % (namespace, reponame)
masterbranch = "toradex_5.4-2.3.x-imx"
check_patch_branch = "check-patch-%d" % os.getpid()
rc = 0

# GitLab CI environment does not give us any direct info about the
# base for the user's branch. We thus need to figure out a common
# ancestor between the user's branch and current git master.
subprocess.check_call(["git", "remote", "add", check_patch_branch, repourl])
try:
    subprocess.check_call(["git", "fetch", check_patch_branch, masterbranch],
                          stdout=subprocess.DEVNULL,
                          stderr=subprocess.DEVNULL)

    ancestor = subprocess.check_output(["git", "merge-base",
                                        check_patch_branch + "/" + masterbranch, "HEAD"],
                                        universal_newlines=True)

    ancestor = ancestor.strip()

    errors = False

    print("\nChecking all commits since %s...\n" % ancestor)

    ret = subprocess.run(["scripts/checkpatch.pl", "-g", ancestor + "..."])

    if ret.returncode != 0:
        print(ret)
        print("    ❌ FAIL one or more commits failed scripts/checkpatch.pl")
        rc = 1
finally:
    subprocess.check_call(["git", "remote", "rm", check_patch_branch])

sys.exit(rc)