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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
import logging
from multiprocessing import Pool
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]+)")
RE_MACRO_END = re.compile(r"\);")
RE_DEPRECATE_MACRO = re.compile(r"\(.*?,(.*)\);", re.MULTILINE)
class HeaderFile(object):
def __init__(self, path):
self.path = path
self.blame_list = self.get_blame_list()
@classmethod
def get_api_header_files(cls, options):
files = subprocess.check_output(
['git', 'ls-tree', '--name-only', '-r', 'HEAD', options.include_dir],
encoding='UTF-8')
files = map(Path, filter(lambda l: l.endswith('.h'), files.splitlines()))
with Pool(processes=24) as pool:
return pool.map(cls, files)
def extract_version(self, 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_list(self):
logging.info(f"blame list for {self.path}")
result = subprocess.check_output(
['git', 'blame', '-t', '--line-porcelain', self.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
def filter_and_print(self, macro, options):
before = options.before
index = 0
re_macro = re.compile(macro)
deprecated = list()
while index < len(self.blame_list):
blame = self.blame_list[index]
line = blame['content']
if line.startswith("#") or line.startswith("//"):
index += 1
continue
commit_datetime = blame['datetime']
if commit_datetime >= before:
index += 1
continue
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 = self.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 - 1
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
for linenumber, commit_datetime, commit_hash, content in deprecated:
self.print_details(linenumber, commit_datetime, commit_hash, content)
def print_details(self, linenumber, commit_datetime, commit_hash, content):
commit_date = commit_datetime.date()
file_position = (f"{self.path}:{linenumber}").ljust(40)
v8_version = f"v{self.extract_version(commit_hash)}".rjust(5)
print(f"{file_position} {v8_version} {commit_date} {commit_hash[:8]}"
f" {content}")
def print_v8_version(self, options):
commit_hash, commit_datetime = subprocess.check_output(
['git', 'log', '-1', '--format=%H%n%ct', self.path],
encoding='UTF-8').splitlines()
commit_datetime = datetime.fromtimestamp(int(commit_datetime))
self.print_details(11, commit_datetime, commit_hash, content="")
def parse_options(args):
parser = argparse.ArgumentParser(
description="Collect deprecation statistics")
parser.add_argument("include_dir", nargs='?', help="Path to includes dir")
parser.add_argument("--before", help="Filter by date")
parser.add_argument("--verbose",
"-v",
help="Verbose logging",
action="store_true")
options = parser.parse_args(args)
if options.verbose:
logging.basicConfig(level=logging.DEBUG)
if options.before:
options.before = datetime.strptime(options.before, '%Y-%m-%d')
else:
options.before = datetime.now()
if options.include_dir is None:
base_path = Path(__file__).parent.parent
options.include_dir = str((base_path / 'include').relative_to(base_path))
return options
def main(args):
options = parse_options(args)
print("# CURRENT V8 VERSION:")
version = HeaderFile(Path(options.include_dir) / 'v8-version.h')
version.print_v8_version(options)
header_files = HeaderFile.get_api_header_files(options)
print("\n")
print("# V8_DEPRECATE_SOON:")
for header in header_files:
header.filter_and_print("V8_DEPRECATE_SOON", options)
print("\n")
print("# V8_DEPRECATED:")
for header in header_files:
header.filter_and_print("V8_DEPRECATED", options)
if __name__ == "__main__":
main(sys.argv[1:])
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