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#!/usr/bin/env python3
import os, re, argparse, subprocess
from datetime import datetime
NULL_COMMIT_RE = re.compile(r'\0\0commit [a-f0-9]{40}$|\0$')
def main():
if not args.git_dir:
cmd = 'git rev-parse --show-toplevel 2>/dev/null || echo .'
top_dir = subprocess.check_output(cmd, shell=True, encoding='utf-8').strip()
args.git_dir = os.path.join(top_dir, '.git')
if not args.prefix:
os.chdir(top_dir)
git = [ 'git', '--git-dir=' + args.git_dir ]
if args.tree:
cmd = git + 'ls-tree -z -r --name-only'.split() + [ args.tree ]
else:
cmd = git + 'ls-files -z'.split()
proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, encoding='utf-8')
out = proc.communicate()[0]
ls = set(out.split('\0'))
ls.discard('')
if not args.tree:
# All modified files keep their current mtime.
proc = subprocess.Popen(git + 'status -z --no-renames'.split(), stdout=subprocess.PIPE, encoding='utf-8')
out = proc.communicate()[0]
for fn in out.split('\0'):
if fn == '' or (fn[0] != 'M' and fn[1] != 'M'):
continue
fn = fn[3:]
if args.list:
mtime = os.lstat(fn).st_mtime
print_line(fn, mtime, mtime)
ls.discard(fn)
cmd = git + 'log -r --name-only --format=%x00commit%x20%H%n%x00commit_time%x20%ct%n --no-renames -z'.split()
if args.tree:
cmd.append(args.tree)
cmd += ['--'] + args.files
proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, encoding='utf-8')
for line in proc.stdout:
line = line.strip()
m = re.match(r'^\0commit_time (\d+)$', line)
if m:
commit_time = int(m[1])
elif NULL_COMMIT_RE.search(line):
line = NULL_COMMIT_RE.sub('', line)
files = set(fn for fn in line.split('\0') if fn in ls)
if not files:
continue
for fn in files:
if args.prefix:
fn = args.prefix + fn
mtime = os.lstat(fn).st_mtime
if args.list:
print_line(fn, mtime, commit_time)
elif mtime != commit_time:
if not args.quiet:
print(f"Setting {fn}")
os.utime(fn, (commit_time, commit_time), follow_symlinks = False)
ls -= files
if not ls:
break
proc.communicate()
def print_line(fn, mtime, commit_time):
if args.list > 1:
ts = str(commit_time).rjust(10)
else:
ts = datetime.utcfromtimestamp(commit_time).strftime("%Y-%m-%d %H:%M:%S")
chg = '.' if mtime == commit_time else '*'
print(chg, ts, fn)
if __name__ == '__main__':
parser = argparse.ArgumentParser(description="Set the times of the files in the current git checkout to their last-changed time.", add_help=False)
parser.add_argument('--git-dir', metavar='GIT_DIR', help="The git dir to query (defaults to affecting the current git checkout).")
parser.add_argument('--tree', metavar='TREE-ISH', help="The tree-ish to query (defaults to the current branch).")
parser.add_argument('--prefix', metavar='PREFIX_STR', help="Prepend the PREFIX_STR to each filename we tweak (defaults to the top of current checkout).")
parser.add_argument('--quiet', '-q', action='store_true', help="Don't output the changed-file information.")
parser.add_argument('--list', '-l', action='count', help="List files & times instead of changing them. Repeat for Unix timestamp instead of human readable.")
parser.add_argument('files', metavar='FILE', nargs='*', help="Specify a subset of checked-out files to tweak.")
parser.add_argument("--help", "-h", action="help", help="Output this help message and exit.")
args = parser.parse_args()
main()
# vim: sw=4 et
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