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#!/usr/bin/env python3
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#
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# Copyright 2014 Olivia Mackall <olivia@selenic.com>
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#
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# A tool/hook to run basic sanity checks on commits/patches for
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# submission to Mercurial. Install by adding the following to your
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# .hg/hgrc:
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#
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# [hooks]
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# pretxncommit = contrib/check-commit
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#
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# The hook can be temporarily bypassed with:
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#
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# $ BYPASS= hg commit
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#
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# See also: https://mercurial-scm.org/wiki/ContributingChanges
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import os
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import re
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import sys
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commitheader = r"^(?:# [^\n]*\n)*"
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afterheader = commitheader + r"(?!#)"
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beforepatch = afterheader + r"(?!\n(?!@@))"
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errors = [
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(beforepatch + r".*[(]bc[)]", "(BC) needs to be uppercase"),
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(
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beforepatch + r".*[(]issue \d\d\d",
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"no space allowed between issue and number",
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),
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(beforepatch + r".*[(]bug(\d|\s)", "use (issueDDDD) instead of bug"),
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(commitheader + r"# User [^@\n]+\n", "username is not an email address"),
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(
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commitheader + r"(?!merge with )[^#]\S+[^:] ",
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"summary line doesn't start with 'topic: '",
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),
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(afterheader + r"[A-Z][a-z]\S+", "don't capitalize summary lines"),
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(afterheader + r"^\S+: *[A-Z][a-z]\S+", "don't capitalize summary lines"),
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(
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afterheader + r"\S*[^A-Za-z0-9-_]\S*: ",
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"summary keyword should be most user-relevant one-word command or topic",
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),
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(afterheader + r".*\.\s*\n", "don't add trailing period on summary line"),
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(afterheader + r".{79,}", "summary line too long (limit is 78)"),
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]
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word = re.compile(r'\S')
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def nonempty(first, second):
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if word.search(first):
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return first
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return second
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def checkcommit(commit, node=None):
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exitcode = 0
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printed = node is None
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hits = []
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signtag = (
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afterheader + r'Added (tag [^ ]+|signature) for changeset [a-f0-9]{12}'
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)
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if re.search(signtag, commit):
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return 0
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for exp, msg in errors:
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for m in re.finditer(exp, commit):
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end = m.end()
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trailing = re.search(r'(\\n)+$', exp)
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if trailing:
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end -= len(trailing.group()) / 2
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hits.append((end, exp, msg))
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if hits:
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hits.sort()
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pos = 0
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last = ''
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for n, l in enumerate(commit.splitlines(True)):
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pos += len(l)
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while len(hits):
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end, exp, msg = hits[0]
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if pos < end:
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break
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if not printed:
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printed = True
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print("node: %s" % node)
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print("%d: %s" % (n, msg))
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print(" %s" % nonempty(l, last)[:-1])
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if "BYPASS" not in os.environ:
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exitcode = 1
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del hits[0]
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last = nonempty(l, last)
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return exitcode
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def readcommit(node):
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return os.popen("hg export %s" % node).read()
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if __name__ == "__main__":
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exitcode = 0
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node = os.environ.get("HG_NODE")
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if node:
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commit = readcommit(node)
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exitcode = checkcommit(commit)
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elif sys.argv[1:]:
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for node in sys.argv[1:]:
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exitcode |= checkcommit(readcommit(node), node)
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else:
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commit = sys.stdin.read()
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exitcode = checkcommit(commit)
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sys.exit(exitcode)
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