contrib/fuzz/dirstate_corpus.py

test-grep: add tests for --follow with/without --diff and/or paths

This tests the behavior of cmdutil.walkchangerevs().

I'm going to rewrite cmdutil.walkchangerevs() to leverage the "log -f"
logic, but the code coverage looked quite small. And the history traversal
of "grep -f" goes wrong in various ways.

from __future__ import absolute_import, print_function

import argparse
import os
import zipfile

ap = argparse.ArgumentParser()
ap.add_argument("out", metavar="some.zip", type=str, nargs=1)
args = ap.parse_args()

reporoot = os.path.normpath(os.path.join(os.path.dirname(__file__), '..', '..'))
dirstate = os.path.join(reporoot, '.hg', 'dirstate')

with zipfile.ZipFile(args.out[0], "w", zipfile.ZIP_STORED) as zf:
    if os.path.exists(dirstate):
        with open(dirstate, 'rb') as f:
            zf.writestr("dirstate", f.read())