You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
251 lines
11 KiB
251 lines
11 KiB
#!/usr/bin/env python3 |
|
# Copyright (c) 2016 Bitcoin Core Developers |
|
# Distributed under the MIT software license, see the accompanying |
|
# file COPYING or http://www.opensource.org/licenses/mit-license.php. |
|
|
|
# This script will locally construct a merge commit for a pull request on a |
|
# github repository, inspect it, sign it and optionally push it. |
|
|
|
# The following temporary branches are created/overwritten and deleted: |
|
# * pull/$PULL/base (the current master we're merging onto) |
|
# * pull/$PULL/head (the current state of the remote pull request) |
|
# * pull/$PULL/merge (github's merge) |
|
# * pull/$PULL/local-merge (our merge) |
|
|
|
# In case of a clean merge that is accepted by the user, the local branch with |
|
# name $BRANCH is overwritten with the merged result, and optionally pushed. |
|
from __future__ import division,print_function,unicode_literals |
|
import os,sys |
|
from sys import stdin,stdout,stderr |
|
import argparse |
|
import subprocess |
|
import json,codecs |
|
try: |
|
from urllib.request import Request,urlopen |
|
except: |
|
from urllib2 import Request,urlopen |
|
|
|
# External tools (can be overridden using environment) |
|
GIT = os.getenv('GIT','git') |
|
BASH = os.getenv('BASH','bash') |
|
|
|
# OS specific configuration for terminal attributes |
|
ATTR_RESET = '' |
|
ATTR_PR = '' |
|
COMMIT_FORMAT = '%h %s (%an)%d' |
|
if os.name == 'posix': # if posix, assume we can use basic terminal escapes |
|
ATTR_RESET = '\033[0m' |
|
ATTR_PR = '\033[1;36m' |
|
COMMIT_FORMAT = '%C(bold blue)%h%Creset %s %C(cyan)(%an)%Creset%C(green)%d%Creset' |
|
|
|
def git_config_get(option, default=None): |
|
''' |
|
Get named configuration option from git repository. |
|
''' |
|
try: |
|
return subprocess.check_output([GIT,'config','--get',option]).rstrip().decode('utf-8') |
|
except subprocess.CalledProcessError as e: |
|
return default |
|
|
|
def retrieve_pr_info(repo,pull): |
|
''' |
|
Retrieve pull request information from github. |
|
Return None if no title can be found, or an error happens. |
|
''' |
|
try: |
|
req = Request("https://api.github.com/repos/"+repo+"/pulls/"+pull) |
|
result = urlopen(req) |
|
reader = codecs.getreader('utf-8') |
|
obj = json.load(reader(result)) |
|
return obj |
|
except Exception as e: |
|
print('Warning: unable to retrieve pull information from github: %s' % e) |
|
return None |
|
|
|
def ask_prompt(text): |
|
print(text,end=" ",file=stderr) |
|
stderr.flush() |
|
reply = stdin.readline().rstrip() |
|
print("",file=stderr) |
|
return reply |
|
|
|
def parse_arguments(): |
|
epilog = ''' |
|
In addition, you can set the following git configuration variables: |
|
githubmerge.repository (mandatory), |
|
user.signingkey (mandatory), |
|
githubmerge.host (default: git@github.com), |
|
githubmerge.branch (no default), |
|
githubmerge.testcmd (default: none). |
|
''' |
|
parser = argparse.ArgumentParser(description='Utility to merge, sign and push github pull requests', |
|
epilog=epilog) |
|
parser.add_argument('pull', metavar='PULL', type=int, nargs=1, |
|
help='Pull request ID to merge') |
|
parser.add_argument('branch', metavar='BRANCH', type=str, nargs='?', |
|
default=None, help='Branch to merge against (default: githubmerge.branch setting, or base branch for pull, or \'master\')') |
|
return parser.parse_args() |
|
|
|
def main(): |
|
# Extract settings from git repo |
|
repo = git_config_get('githubmerge.repository') |
|
host = git_config_get('githubmerge.host','git@github.com') |
|
opt_branch = git_config_get('githubmerge.branch',None) |
|
testcmd = git_config_get('githubmerge.testcmd') |
|
signingkey = git_config_get('user.signingkey') |
|
if repo is None: |
|
print("ERROR: No repository configured. Use this command to set:", file=stderr) |
|
print("git config githubmerge.repository <owner>/<repo>", file=stderr) |
|
exit(1) |
|
if signingkey is None: |
|
print("ERROR: No GPG signing key set. Set one using:",file=stderr) |
|
print("git config --global user.signingkey <key>",file=stderr) |
|
exit(1) |
|
|
|
host_repo = host+":"+repo # shortcut for push/pull target |
|
|
|
# Extract settings from command line |
|
args = parse_arguments() |
|
pull = str(args.pull[0]) |
|
|
|
# Receive pull information from github |
|
info = retrieve_pr_info(repo,pull) |
|
if info is None: |
|
exit(1) |
|
title = info['title'] |
|
# precedence order for destination branch argument: |
|
# - command line argument |
|
# - githubmerge.branch setting |
|
# - base branch for pull (as retrieved from github) |
|
# - 'master' |
|
branch = args.branch or opt_branch or info['base']['ref'] or 'master' |
|
|
|
# Initialize source branches |
|
head_branch = 'pull/'+pull+'/head' |
|
base_branch = 'pull/'+pull+'/base' |
|
merge_branch = 'pull/'+pull+'/merge' |
|
local_merge_branch = 'pull/'+pull+'/local-merge' |
|
|
|
devnull = open(os.devnull,'w') |
|
try: |
|
subprocess.check_call([GIT,'checkout','-q',branch]) |
|
except subprocess.CalledProcessError as e: |
|
print("ERROR: Cannot check out branch %s." % (branch), file=stderr) |
|
exit(3) |
|
try: |
|
subprocess.check_call([GIT,'fetch','-q',host_repo,'+refs/pull/'+pull+'/*:refs/heads/pull/'+pull+'/*']) |
|
except subprocess.CalledProcessError as e: |
|
print("ERROR: Cannot find pull request #%s on %s." % (pull,host_repo), file=stderr) |
|
exit(3) |
|
try: |
|
subprocess.check_call([GIT,'log','-q','-1','refs/heads/'+head_branch], stdout=devnull, stderr=stdout) |
|
except subprocess.CalledProcessError as e: |
|
print("ERROR: Cannot find head of pull request #%s on %s." % (pull,host_repo), file=stderr) |
|
exit(3) |
|
try: |
|
subprocess.check_call([GIT,'log','-q','-1','refs/heads/'+merge_branch], stdout=devnull, stderr=stdout) |
|
except subprocess.CalledProcessError as e: |
|
print("ERROR: Cannot find merge of pull request #%s on %s." % (pull,host_repo), file=stderr) |
|
exit(3) |
|
try: |
|
subprocess.check_call([GIT,'fetch','-q',host_repo,'+refs/heads/'+branch+':refs/heads/'+base_branch]) |
|
except subprocess.CalledProcessError as e: |
|
print("ERROR: Cannot find branch %s on %s." % (branch,host_repo), file=stderr) |
|
exit(3) |
|
subprocess.check_call([GIT,'checkout','-q',base_branch]) |
|
subprocess.call([GIT,'branch','-q','-D',local_merge_branch], stderr=devnull) |
|
subprocess.check_call([GIT,'checkout','-q','-b',local_merge_branch]) |
|
|
|
try: |
|
# Create unsigned merge commit. |
|
if title: |
|
firstline = 'Merge #%s: %s' % (pull,title) |
|
else: |
|
firstline = 'Merge #%s' % (pull,) |
|
message = firstline + '\n\n' |
|
message += subprocess.check_output([GIT,'log','--no-merges','--topo-order','--pretty=format:%h %s (%an)',base_branch+'..'+head_branch]).decode('utf-8') |
|
try: |
|
subprocess.check_call([GIT,'merge','-q','--commit','--no-edit','--no-ff','-m',message.encode('utf-8'),head_branch]) |
|
except subprocess.CalledProcessError as e: |
|
print("ERROR: Cannot be merged cleanly.",file=stderr) |
|
subprocess.check_call([GIT,'merge','--abort']) |
|
exit(4) |
|
logmsg = subprocess.check_output([GIT,'log','--pretty=format:%s','-n','1']).decode('utf-8') |
|
if logmsg.rstrip() != firstline.rstrip(): |
|
print("ERROR: Creating merge failed (already merged?).",file=stderr) |
|
exit(4) |
|
|
|
print('%s#%s%s %s %sinto %s%s' % (ATTR_RESET+ATTR_PR,pull,ATTR_RESET,title,ATTR_RESET+ATTR_PR,branch,ATTR_RESET)) |
|
subprocess.check_call([GIT,'log','--graph','--topo-order','--pretty=format:'+COMMIT_FORMAT,base_branch+'..'+head_branch]) |
|
print() |
|
# Run test command if configured. |
|
if testcmd: |
|
# Go up to the repository's root. |
|
toplevel = subprocess.check_output([GIT,'rev-parse','--show-toplevel']).strip() |
|
os.chdir(toplevel) |
|
if subprocess.call(testcmd,shell=True): |
|
print("ERROR: Running %s failed." % testcmd,file=stderr) |
|
exit(5) |
|
|
|
# Show the created merge. |
|
diff = subprocess.check_output([GIT,'diff',merge_branch+'..'+local_merge_branch]) |
|
subprocess.check_call([GIT,'diff',base_branch+'..'+local_merge_branch]) |
|
if diff: |
|
print("WARNING: merge differs from github!",file=stderr) |
|
reply = ask_prompt("Type 'ignore' to continue.") |
|
if reply.lower() == 'ignore': |
|
print("Difference with github ignored.",file=stderr) |
|
else: |
|
exit(6) |
|
reply = ask_prompt("Press 'd' to accept the diff.") |
|
if reply.lower() == 'd': |
|
print("Diff accepted.",file=stderr) |
|
else: |
|
print("ERROR: Diff rejected.",file=stderr) |
|
exit(6) |
|
else: |
|
# Verify the result manually. |
|
print("Dropping you on a shell so you can try building/testing the merged source.",file=stderr) |
|
print("Run 'git diff HEAD~' to show the changes being merged.",file=stderr) |
|
print("Type 'exit' when done.",file=stderr) |
|
if os.path.isfile('/etc/debian_version'): # Show pull number on Debian default prompt |
|
os.putenv('debian_chroot',pull) |
|
subprocess.call([BASH,'-i']) |
|
reply = ask_prompt("Type 'm' to accept the merge.") |
|
if reply.lower() == 'm': |
|
print("Merge accepted.",file=stderr) |
|
else: |
|
print("ERROR: Merge rejected.",file=stderr) |
|
exit(7) |
|
|
|
# Sign the merge commit. |
|
reply = ask_prompt("Type 's' to sign off on the merge.") |
|
if reply == 's': |
|
try: |
|
subprocess.check_call([GIT,'commit','-q','--gpg-sign','--amend','--no-edit']) |
|
except subprocess.CalledProcessError as e: |
|
print("Error signing, exiting.",file=stderr) |
|
exit(1) |
|
else: |
|
print("Not signing off on merge, exiting.",file=stderr) |
|
exit(1) |
|
|
|
# Put the result in branch. |
|
subprocess.check_call([GIT,'checkout','-q',branch]) |
|
subprocess.check_call([GIT,'reset','-q','--hard',local_merge_branch]) |
|
finally: |
|
# Clean up temporary branches. |
|
subprocess.call([GIT,'checkout','-q',branch]) |
|
subprocess.call([GIT,'branch','-q','-D',head_branch],stderr=devnull) |
|
subprocess.call([GIT,'branch','-q','-D',base_branch],stderr=devnull) |
|
subprocess.call([GIT,'branch','-q','-D',merge_branch],stderr=devnull) |
|
subprocess.call([GIT,'branch','-q','-D',local_merge_branch],stderr=devnull) |
|
|
|
# Push the result. |
|
reply = ask_prompt("Type 'push' to push the result to %s, branch %s." % (host_repo,branch)) |
|
if reply.lower() == 'push': |
|
subprocess.check_call([GIT,'push',host_repo,'refs/heads/'+branch]) |
|
|
|
if __name__ == '__main__': |
|
main() |
|
|
|
|