7d99dee286
Fixes a bug in github merge when it runs the tests where the toplevel directory has an extra '\n' appended to the path string. Now it doesn't.
236 lines
10 KiB
Python
Executable File
236 lines
10 KiB
Python
Executable File
#!/usr/bin/env python2
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# Copyright (c) 2016 Bitcoin Core Developers
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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# This script will locally construct a merge commit for a pull request on a
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# github repository, inspect it, sign it and optionally push it.
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# The following temporary branches are created/overwritten and deleted:
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# * pull/$PULL/base (the current master we're merging onto)
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# * pull/$PULL/head (the current state of the remote pull request)
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# * pull/$PULL/merge (github's merge)
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# * pull/$PULL/local-merge (our merge)
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# In case of a clean merge that is accepted by the user, the local branch with
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# name $BRANCH is overwritten with the merged result, and optionally pushed.
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from __future__ import division,print_function,unicode_literals
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import os,sys
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from sys import stdin,stdout,stderr
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import argparse
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import subprocess
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# External tools (can be overridden using environment)
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GIT = os.getenv('GIT','git')
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BASH = os.getenv('BASH','bash')
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# OS specific configuration for terminal attributes
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ATTR_RESET = ''
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ATTR_PR = ''
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COMMIT_FORMAT = '%h %s (%an)%d'
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if os.name == 'posix': # if posix, assume we can use basic terminal escapes
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ATTR_RESET = '\033[0m'
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ATTR_PR = '\033[1;36m'
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COMMIT_FORMAT = '%C(bold blue)%h%Creset %s %C(cyan)(%an)%Creset%C(green)%d%Creset'
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def git_config_get(option, default=None):
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'''
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Get named configuration option from git repository.
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'''
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try:
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return subprocess.check_output([GIT,'config','--get',option]).rstrip()
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except subprocess.CalledProcessError as e:
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return default
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def retrieve_pr_title(repo,pull):
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'''
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Retrieve pull request title from github.
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Return None if no title can be found, or an error happens.
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'''
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import urllib2,json
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try:
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req = urllib2.Request("https://api.github.com/repos/"+repo+"/pulls/"+pull)
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result = urllib2.urlopen(req)
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result = json.load(result)
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return result['title']
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except Exception as e:
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print('Warning: unable to retrieve pull title from github: %s' % e)
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return None
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def ask_prompt(text):
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print(text,end=" ",file=stderr)
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reply = stdin.readline().rstrip()
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print("",file=stderr)
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return reply
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def parse_arguments(branch):
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epilog = '''
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In addition, you can set the following git configuration variables:
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githubmerge.repository (mandatory),
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user.signingkey (mandatory),
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githubmerge.host (default: git@github.com),
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githubmerge.branch (default: master),
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githubmerge.testcmd (default: none).
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'''
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parser = argparse.ArgumentParser(description='Utility to merge, sign and push github pull requests',
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epilog=epilog)
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parser.add_argument('pull', metavar='PULL', type=int, nargs=1,
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help='Pull request ID to merge')
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parser.add_argument('branch', metavar='BRANCH', type=str, nargs='?',
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default=branch, help='Branch to merge against (default: '+branch+')')
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return parser.parse_args()
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def main():
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# Extract settings from git repo
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repo = git_config_get('githubmerge.repository')
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host = git_config_get('githubmerge.host','git@github.com')
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branch = git_config_get('githubmerge.branch','master')
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testcmd = git_config_get('githubmerge.testcmd')
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signingkey = git_config_get('user.signingkey')
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if repo is None:
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print("ERROR: No repository configured. Use this command to set:", file=stderr)
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print("git config githubmerge.repository <owner>/<repo>", file=stderr)
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exit(1)
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if signingkey is None:
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print("ERROR: No GPG signing key set. Set one using:",file=stderr)
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print("git config --global user.signingkey <key>",file=stderr)
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exit(1)
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host_repo = host+":"+repo # shortcut for push/pull target
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# Extract settings from command line
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args = parse_arguments(branch)
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pull = str(args.pull[0])
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branch = args.branch
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# Initialize source branches
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head_branch = 'pull/'+pull+'/head'
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base_branch = 'pull/'+pull+'/base'
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merge_branch = 'pull/'+pull+'/merge'
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local_merge_branch = 'pull/'+pull+'/local-merge'
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devnull = open(os.devnull,'w')
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try:
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subprocess.check_call([GIT,'checkout','-q',branch])
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except subprocess.CalledProcessError as e:
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print("ERROR: Cannot check out branch %s." % (branch), file=stderr)
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exit(3)
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try:
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subprocess.check_call([GIT,'fetch','-q',host_repo,'+refs/pull/'+pull+'/*:refs/heads/pull/'+pull+'/*'])
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except subprocess.CalledProcessError as e:
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print("ERROR: Cannot find pull request #%s on %s." % (pull,host_repo), file=stderr)
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exit(3)
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try:
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subprocess.check_call([GIT,'log','-q','-1','refs/heads/'+head_branch], stdout=devnull, stderr=stdout)
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except subprocess.CalledProcessError as e:
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print("ERROR: Cannot find head of pull request #%s on %s." % (pull,host_repo), file=stderr)
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exit(3)
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try:
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subprocess.check_call([GIT,'log','-q','-1','refs/heads/'+merge_branch], stdout=devnull, stderr=stdout)
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except subprocess.CalledProcessError as e:
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print("ERROR: Cannot find merge of pull request #%s on %s." % (pull,host_repo), file=stderr)
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exit(3)
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try:
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subprocess.check_call([GIT,'fetch','-q',host_repo,'+refs/heads/'+branch+':refs/heads/'+base_branch])
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except subprocess.CalledProcessError as e:
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print("ERROR: Cannot find branch %s on %s." % (branch,host_repo), file=stderr)
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exit(3)
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subprocess.check_call([GIT,'checkout','-q',base_branch])
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subprocess.call([GIT,'branch','-q','-D',local_merge_branch], stderr=devnull)
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subprocess.check_call([GIT,'checkout','-q','-b',local_merge_branch])
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try:
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# Create unsigned merge commit.
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title = retrieve_pr_title(repo,pull)
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if title:
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firstline = 'Merge #%s: %s' % (pull,title)
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else:
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firstline = 'Merge #%s' % (pull,)
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message = firstline + '\n\n'
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message += subprocess.check_output([GIT,'log','--no-merges','--topo-order','--pretty=format:%h %s (%an)',base_branch+'..'+head_branch])
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try:
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subprocess.check_call([GIT,'merge','-q','--commit','--no-edit','--no-ff','-m',message,head_branch])
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except subprocess.CalledProcessError as e:
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print("ERROR: Cannot be merged cleanly.",file=stderr)
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subprocess.check_call([GIT,'merge','--abort'])
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exit(4)
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logmsg = subprocess.check_output([GIT,'log','--pretty=format:%s','-n','1'])
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if logmsg.rstrip() != firstline.rstrip():
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print("ERROR: Creating merge failed (already merged?).",file=stderr)
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exit(4)
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print('%s#%s%s %s' % (ATTR_RESET+ATTR_PR,pull,ATTR_RESET,title))
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subprocess.check_call([GIT,'log','--graph','--topo-order','--pretty=format:'+COMMIT_FORMAT,base_branch+'..'+head_branch])
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print()
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# Run test command if configured.
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if testcmd:
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# Go up to the repository's root.
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toplevel = subprocess.check_output([GIT,'rev-parse','--show-toplevel']).strip()
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os.chdir(toplevel)
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if subprocess.call(testcmd,shell=True):
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print("ERROR: Running %s failed." % testcmd,file=stderr)
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exit(5)
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# Show the created merge.
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diff = subprocess.check_output([GIT,'diff',merge_branch+'..'+local_merge_branch])
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subprocess.check_call([GIT,'diff',base_branch+'..'+local_merge_branch])
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if diff:
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print("WARNING: merge differs from github!",file=stderr)
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reply = ask_prompt("Type 'ignore' to continue.")
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if reply.lower() == 'ignore':
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print("Difference with github ignored.",file=stderr)
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else:
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exit(6)
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reply = ask_prompt("Press 'd' to accept the diff.")
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if reply.lower() == 'd':
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print("Diff accepted.",file=stderr)
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else:
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print("ERROR: Diff rejected.",file=stderr)
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exit(6)
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else:
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# Verify the result manually.
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print("Dropping you on a shell so you can try building/testing the merged source.",file=stderr)
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print("Run 'git diff HEAD~' to show the changes being merged.",file=stderr)
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print("Type 'exit' when done.",file=stderr)
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if os.path.isfile('/etc/debian_version'): # Show pull number on Debian default prompt
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os.putenv('debian_chroot',pull)
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subprocess.call([BASH,'-i'])
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reply = ask_prompt("Type 'm' to accept the merge.")
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if reply.lower() == 'm':
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print("Merge accepted.",file=stderr)
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else:
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print("ERROR: Merge rejected.",file=stderr)
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exit(7)
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# Sign the merge commit.
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reply = ask_prompt("Type 's' to sign off on the merge.")
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if reply == 's':
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try:
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subprocess.check_call([GIT,'commit','-q','--gpg-sign','--amend','--no-edit'])
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except subprocess.CalledProcessError as e:
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print("Error signing, exiting.",file=stderr)
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exit(1)
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else:
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print("Not signing off on merge, exiting.",file=stderr)
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exit(1)
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# Put the result in branch.
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subprocess.check_call([GIT,'checkout','-q',branch])
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subprocess.check_call([GIT,'reset','-q','--hard',local_merge_branch])
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finally:
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# Clean up temporary branches.
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subprocess.call([GIT,'checkout','-q',branch])
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subprocess.call([GIT,'branch','-q','-D',head_branch],stderr=devnull)
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subprocess.call([GIT,'branch','-q','-D',base_branch],stderr=devnull)
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subprocess.call([GIT,'branch','-q','-D',merge_branch],stderr=devnull)
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subprocess.call([GIT,'branch','-q','-D',local_merge_branch],stderr=devnull)
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# Push the result.
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reply = ask_prompt("Type 'push' to push the result to %s, branch %s." % (host_repo,branch))
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if reply.lower() == 'push':
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subprocess.check_call([GIT,'push',host_repo,'refs/heads/'+branch])
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if __name__ == '__main__':
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main()
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