view tests/testlib/check-compat-strings.py @ 5601:3946ee4ee3ae

topic: add a `exp….topic.linear-merge` option to allow some oedipus

If this option is set to `from-branch`, a user can call `hg merge some-topic`
from a bare branch even if `some-topic` is a direct descendant of the current
working copy parents. This was previously denied if the changesets was on the
same branch, since the result would be an "oedipus merge".

Some user have been requesting this, and this type of merge is one of Gitlab
standard way of merging a "Merge Request". That new option will unlock issue
`heptapod#200` and make this mode available for those who wants it.

#!/usr/bin/env python
"""
This script finds compatibility-related comments with a node hash specified
in all files in a given directory (. by default) and looks up the hash in a
repo (~/hg by default) to determine if each of the comments is correct and,
if not, it suggests the correct release. This can prevent accidentally
removing a piece of code that was misattributed to a different (earlier)
release of core hg.

Usage: $0 WDIR HGREPO where WDIR is usually evolve/hgext3rd/ and HGREPO is
the place with core Mercurial repo (not just checkout). Said repo has to be
sufficiently up-to-date, otherwise this script may not work correctly.
"""

from __future__ import print_function

import argparse
import os
import re
from subprocess import check_output

def grepall(workdir, linere):
    for root, dirs, files in os.walk(workdir):
        for fname in files:
            if not fname.endswith('.py'):
                continue
            path = os.path.join(root, fname)
            with open(path, 'r') as src:
                for lineno, line in enumerate(src, 1):
                    for groups in linere.findall(line):
                        yield path, lineno, line, groups

def main():
    ap = argparse.ArgumentParser()
    ap.add_argument('workdir', nargs='?', default='.')
    ap.add_argument('hgdir', nargs='?', default=os.path.expanduser('~/hg'))

    opts = ap.parse_args()

    linere = re.compile(r'hg <= ([0-9.]+) \(([0-9a-f+]+)\)')
    basecmd = ['hg', '--cwd', opts.hgdir, 'log', '-T', '{tags}']
    hgenv = {'HGPLAIN': '1', 'HGENCODING': 'UTF-8'}
    relcache = {}

    for path, lineno, line, match in grepall(opts.workdir, linere):
        expected, revset = match

        if revset not in relcache:
            tagrevset = 'max(tag("re:^[0-9]\\.[0-9]$") - (%s)::)' % revset
            cmd = basecmd + ['-r', tagrevset]
            relcache[revset] = check_output(cmd, env=hgenv).decode('UTF-8')

        lastrel = relcache[revset]

        if lastrel != expected:
            print('%s:%d:%s' % (path, lineno, line.rstrip('\r\n')))
            print('\\ actual last major release without %s is %s'
                  % (revset, lastrel))
            print()

if __name__ == '__main__':
    main()