Capturing changes to pre-commit and testing commit hook correction. Related to #3297. Commit ready to merge.
- Legacy-Id: 19056
This commit is contained in:
Robert Sparks
parent
ffd82f1ce8
commit
14df71e4e7
217
hooks/pre-commit
217
hooks/pre-commit
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@ -1,162 +1,69 @@
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#!/usr/bin/env python
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#!/bin/bash
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#
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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#
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#
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# $Id$
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#
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# Prevents some SHA-1 collisions to be commited
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# Test fo the 320 byte prefix found on https://shattered.io/
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# If the files are committed in the same transaction, svnlook
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# will error out itself due to the apparent corruption in the
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# candidate revision
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"""
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An SVN pre-commit hook which requires that commits either are marked as
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whitespace cleanup commits, and contain no non-whitespace changes, or
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leave whitespace alone on lines without code changes.
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"""
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REPOS="$1"
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TXN="$2"
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SVNLOOK=/usr/bin/svnlook
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YEAR=$(date +%Y)
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import os
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import sys
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import difflib
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#import debug
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from pysvn import Client, Transaction
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$SVNLOOK changed -t "$TXN" "$REPOS"
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if [ $? -ne 0 ]; then
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echo "svnlook failed, possible SHA-1 collision" >&2
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exit 2
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fi
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prog = os.path.basename(sys.argv[0])
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FILES=$($SVNLOOK changed -t "$TXN" "$REPOS" | grep -Ev '^D ' | /usr/bin/awk '{print $2}')
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for FILE in $FILES; do
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if [ -f $FILE ]; then
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# Check against known sha-1 collision attack. Someone committing 2 different files with this
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# known hash collision could otherwise break the repository.
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PREFIX=$($SVNLOOK cat -t "$TXN" "$REPOS" "$FILE" | head -c320 | /usr/bin/sha1sum | cut -c-40)
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if [ "$PREFIX" = 'f92d74e3874587aaf443d1db961d4e26dde13e9c' ]; then
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echo "known SHA-1 collision rejected" >&2
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exit 3
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fi
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def die(msg):
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sys.stderr.write("\n%s: Error: %s\n" % (prog, msg))
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sys.exit(1)
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# Verify copyright year
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if [[ $FILE == */ietf/*.py || -s $FILE ]]; then
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$SVNLOOK cat -t "$TXN" "$REPOS" "$FILE" | head -n 3 | grep -q "Copyright .*IETF Trust .*$YEAR.*" || {
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echo "
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Bad or missing copyright note in $FILE.
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Expected 'Copyright The IETF Trust ... $YEAR, All Rights Reserved',
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(or similar) at the start of the file.
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if len(sys.argv) <= 1:
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die("Expected arguments: REPOSITORY TRANSACTION, found none")
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For bulk correction of copyright statements, try bin/check-copyright with
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patching:
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if len(sys.argv) <= 2:
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die( "Expected arguments: REPOSITORY TRANSACTION, found only '%s'" % sys.argv[1])
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\$ bin/check-copyright -p \$(svn st | cut -c 9- | grep '\.py\$' ) | patch -p0
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repo = sys.argv[1]
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txname = sys.argv[2]
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tx = Transaction(repo, txname)
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client = Client()
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is_whitespace_cleanup = "whitespace cleanup" in tx.revpropget("svn:log").lower()
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def normalize(s):
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return s.rstrip().expandtabs()
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def normalize_sequence(seq):
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o = []
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for l in seq:
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o.append(normalize(l))
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return o
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def normalize_file_end(seq):
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while True and seq:
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if seq[-1].strip() == "":
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del seq[-1]
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else:
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break
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return seq
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def count(gen):
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return sum(1 for _ in gen)
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# Function with side effects. Acts on global varaibles
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def inc_ab(flag):
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global a, b
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if flag == ' ':
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a += 1; b += 1
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elif flag == '-':
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a += 1
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elif flag == '+':
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b += 1
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elif flag == '?':
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pass
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else:
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raise ValueError("Unexpected ndiff mark: '%s' in: %s" % (flag, plain_diff[i]))
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def get_chunks(unidiff):
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if not unidiff:
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return [], []
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chunks = []
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chunk = []
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intro = unidiff[0:2]
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for line in unidiff[2:]:
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if line.startswith("@@"):
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if chunk:
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chunks.append(chunk)
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chunk = [line]
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else:
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chunk.append(line)
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chunks.append(chunk)
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return intro, chunks
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changes = tx.changed()
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issues = {}
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context = 3
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for path in changes:
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action, kind, mod, propmod = changes[path]
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# Don't try to diff added or deleted files, on ly changed text files
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if not (mod and action == "R"):
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continue
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# Don't try do diff binary files
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mimetype = tx.propget("svn:mime-type", path)
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if mimetype and not mimetype.startswith("text/"):
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continue
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new = tx.cat(path).splitlines()
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old = client.cat("file://"+os.path.join(repo,path)).splitlines()
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# Added trailing space can mess up the comparison -- eliminate it
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new = normalize_file_end(new)
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old = normalize_file_end(old)
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plain_diff = list(difflib.unified_diff(old, new, "%s (repository)"%path, "%s (commit)"%path, lineterm="" ))
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old = normalize_sequence(old)
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new = normalize_sequence(new)
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white_diff = list(difflib.unified_diff(old, new, "%s (repository)"%path, "%s (commit)"%path, lineterm=""))
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plain_count = len(plain_diff)
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white_count = len(white_diff)
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# for i in range(len(white_diff)):
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# sys.stderr.write("%-80s | %-80s\n" % (normalize(plain_diff[i][:80]), normalize(white_diff[i][:80])))
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if white_count != plain_count and not is_whitespace_cleanup:
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intro, plain_chunks = get_chunks(plain_diff)
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intro, white_chunks = get_chunks(white_diff)
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deletes = []
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for chunk in white_chunks:
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for i in range(len(plain_chunks)):
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if chunk == plain_chunks[i]:
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deletes += [i]
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deletes.reverse()
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for i in deletes:
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del plain_chunks[i]
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issue = intro
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for chunk in plain_chunks:
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issue += chunk
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if len(plain_chunks) > 1:
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are = "are"; s = "s"; an = ""
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else:
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are = "is"; s = ""; an = "an "
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issues[path] = issue
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if white_count != 0 and is_whitespace_cleanup:
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intro, white_chunks = get_chunks(white_diff)
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if len(white_chunks) > 1:
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are = "are"; s = "s"; an = ""
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else:
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are = "is"; s = ""; an = "an "
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issues[path] = white_diff
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if issues:
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if is_whitespace_cleanup:
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die("It looks as if there are non-whitespace changes in\n"
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"this commit, but it was marked as a whitespace cleanup commit.\n\n"
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"Here %s the diff chunk%s with unexpected change%s:\n\n%s\n\n"
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"Declining the commit due to a mix of code and spaces-only changes. Please\n"
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"avoid mixing whitespace-only changes with code changes. See details above." %
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(are, s, s, '\n\n'.join([ '\n'.join(issues[path]) for path in issues ]))
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)
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else:
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die("It looks as if there are spaces-only changes in this\n"
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"commit, but it was not marked as a whitespace cleanup commit.\n\n"
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"Here %s the diff chunk%s with unexpected change%s:\n\n%s\n\n"
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"Declining the commit due to a mix of code and spaces-only changes. Please\n"
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"avoid mixing whitespace-only changes with code changes. See details above." %
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(are, s, s, '\n\n'.join([ '\n'.join(issues[path]) for path in issues ]))
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)
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sys.exit(0)
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" >&2
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exit 3
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}
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fi
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fi
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done
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