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#! /usr/bin/env python3
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
assert __name__ != "__main__"
"""
Any time we vendor[1] from an external git repo, we want to keep a record of the csets
we're pulling from.
This script leaves a record of the merge-base reference tip and cherry-picks that we pull
into Gecko. (such as gfx/angle/cherry_picks.txt)
"""
from pathlib import *
import subprocess
import sys
# --
def print_now(*args):
print(*args)
sys.stdout.flush()
def run_checked(*args, **kwargs):
print(" ", args)
sys.stdout.flush()
return subprocess.run(args, check=True, **kwargs)
# --
def record_cherry_picks(dir_in_gecko, merge_base_origin):
# merge_base_origin is not always 'origin'!
base_merge_base_from = Path(dir_in_gecko, "MERGE_BASE").read_text().split("\n")[0]
merge_base_from = merge_base_origin + "/" + base_merge_base_from
assert "/" in merge_base_from, "Please specify a reference tip from a remote."
log_path = Path(dir_in_gecko, "cherry_picks.txt")
print_now("Logging cherry picks to {}.".format(log_path))
merge_base = (
run_checked(
"git", "merge-base", "HEAD", merge_base_from, stdout=subprocess.PIPE
)
.stdout.decode()
.strip()
)
merge_base_readable = (
run_checked(
"git",
"show",
"-s",
"--format=commit %H %cd",
merge_base,
stdout=subprocess.PIPE,
)
.stdout.decode()
.strip()
)
mb_info = run_checked(
"git",
"log",
"--format=medium",
"--no-decorate",
"--no-abbrev-commit",
"{}~1..{}".format(merge_base, merge_base),
stdout=subprocess.PIPE,
).stdout
cherries = run_checked(
"git",
"log",
"--format=medium",
"--no-decorate",
"--no-abbrev-commit",
merge_base + "..",
stdout=subprocess.PIPE,
).stdout
with open(log_path, "wb") as f:
f.write(cherries)
f.write(b"\nAbove: cherries picked")
f.write(b"\n" + (b"=" * 80))
f.write(b"\nBelow: merge base from: " + merge_base_from.encode())
f.write(b"\n\n")
f.write(mb_info)
# The below supports only a single commit-alert task. If/when we add another task, this
# will need to be improved.
print_now("Updating moz.yaml")
moz_yaml_file = Path(dir_in_gecko, "moz.yaml")
with open(moz_yaml_file, "r") as f:
moz_yaml_contents = f.readlines()
with open(moz_yaml_file, "wb") as f:
for line in moz_yaml_contents:
def prefix():
return line[0 : line.index(": ") + 2].encode()
if "branch: " in line:
f.write(prefix() + base_merge_base_from.encode() + b"\n")
elif "release: " in line:
f.write(prefix() + merge_base_readable.encode() + b"\n")
elif "revision: " in line:
f.write(prefix() + merge_base.encode() + b"\n")
else:
f.write(line.encode())