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#!/usr/bin/env python3
# Copyright 2018 the V8 project authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import argparse
from datetime import datetime
import re
import subprocess
import sys
from pathlib import Path
RE_GITHASH = re.compile(r"^[0-9a-f]{40}")
RE_AUTHOR_TIME = re.compile(r"^author-time (\d+)$")
RE_FILENAME = re.compile(r"^filename (.+)$")
VERSION_CACHE = dict()
RE_VERSION_MAJOR = re.compile(r".*V8_MAJOR_VERSION ([0-9]+)")
RE_VERSION_MINOR = re.compile(r".*V8_MINOR_VERSION ([0-9]+)")
def extract_version(hash):
if hash in VERSION_CACHE:
return VERSION_CACHE[hash]
if hash == '0000000000000000000000000000000000000000':
return 'HEAD'
result = subprocess.check_output(
['git', 'show', f"{hash}:include/v8-version.h"], encoding='UTF-8')
major = RE_VERSION_MAJOR.search(result).group(1)
minor = RE_VERSION_MINOR.search(result).group(1)
version = f"{major}.{minor}"
VERSION_CACHE[hash] = version
return version
def get_blame(file_path):
result = subprocess.check_output(
['git', 'blame', '-t', '--line-porcelain', file_path], encoding='UTF-8')
line_iter = iter(result.splitlines())
blame_list = list()
current_blame = None
while True:
line = next(line_iter, None)
if line is None:
break
if RE_GITHASH.match(line):
if current_blame is not None:
blame_list.append(current_blame)
hash = line.split(" ")[0]
current_blame = {
'datetime': 0,
'filename': None,
'content': None,
'hash': hash
}
continue
match = RE_AUTHOR_TIME.match(line)
if match:
current_blame['datetime'] = datetime.fromtimestamp(int(
match.groups()[0]))
continue
match = RE_FILENAME.match(line)
if match:
current_blame['filename'] = match.groups()[0]
current_blame['content'] = next(line_iter).strip()
continue
blame_list.append(current_blame)
return blame_list
RE_MACRO_END = re.compile(r"\);")
RE_DEPRECATE_MACRO = re.compile(r"\(.*?,(.*)\);", re.MULTILINE)
def filter_and_print(blame_list, macro, options):
before = options.before
index = 0
re_macro = re.compile(macro)
deprecated = list()
while index < len(blame_list):
blame = blame_list[index]
commit_datetime = blame['datetime']
if commit_datetime >= before:
index += 1
continue
line = blame['content']
commit_hash = blame['hash']
match = re_macro.search(line)
if match:
pos = match.end()
start = -1
parens = 0
while True:
if pos >= len(line):
# Extend to next line
index = index + 1
blame = blame_list[index]
line = line + blame['content']
if line[pos] == '(':
parens = parens + 1
elif line[pos] == ')':
parens = parens - 1
if parens == 0:
# Exclude closing ")
pos = pos - 2
break
elif line[pos] == '"' and start == -1:
start = pos + 1
pos = pos + 1
# Extract content and replace double quotes from merged lines
content = line[start:pos].strip().replace('""', '')
deprecated.append((index + 1, commit_datetime, commit_hash, content))
index = index + 1
print(f"# Marked as {macro}: {len(deprecated)}")
for linenumber, commit_datetime, commit_hash, content in deprecated:
commit_date = commit_datetime.date()
file_position = (
f"{options.v8_header}:{linenumber}").rjust(len(options.v8_header) + 5)
print(f" {file_position}\t{commit_date}\t{commit_hash[:8]}"
f"\t{extract_version(commit_hash)}\t{content}")
return len(deprecated)
def parse_options(args):
parser = argparse.ArgumentParser(
description="Collect deprecation statistics")
parser.add_argument("v8_header", nargs='?', help="Path to v8.h")
parser.add_argument("--before", help="Filter by date")
options = parser.parse_args(args)
if options.before:
options.before = datetime.strptime(options.before, '%Y-%m-%d')
else:
options.before = datetime.now()
if options.v8_header is None:
base_path = Path(__file__).parent.parent
options.v8_header = str(
(base_path / 'include' / 'v8.h').relative_to(base_path))
return options
def main(args):
options = parse_options(args)
blame_list = get_blame(options.v8_header)
filter_and_print(blame_list, "V8_DEPRECATE_SOON", options)
print("\n")
filter_and_print(blame_list, "V8_DEPRECATED", options)
if __name__ == "__main__":
main(sys.argv[1:])
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