Mercurial > hg
view contrib/undumprevlog @ 47349:7138c863d0a1
dirstate-v2: Skip readdir in status based on directory mtime
When calling `read_dir` during `status` and the directory is found to be
eligible for caching (see code comments), write the directory’s mtime to the
dirstate. The presence of a directory mtime in the dirstate is meaningful
and indicates eligibility.
When an eligible directory mtime is found in the dirstate and `stat()` shows
that the mtime has not changed, `status` can skip calling `read_dir` again
and instead rely on the names of child nodes in the dirstate tree.
The `tempfile` crate is used to create a temporary file in order to use its
modification time as "current time" with the same truncation as other files
and directories would have in their own modification time.
Differential Revision: https://phab.mercurial-scm.org/D10826
author | Simon Sapin <simon.sapin@octobus.net> |
---|---|
date | Fri, 28 May 2021 11:48:59 +0200 |
parents | 8d3c2f9d4af7 |
children | 6000f5b25c9b |
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#!/usr/bin/env python3 # Undump a dump from dumprevlog # $ hg init # $ undumprevlog < repo.dump from __future__ import absolute_import, print_function import sys from mercurial.node import bin from mercurial import ( encoding, revlog, transaction, vfs as vfsmod, ) from mercurial.utils import procutil from mercurial.revlogutils import ( constants as revlog_constants, ) for fp in (sys.stdin, sys.stdout, sys.stderr): procutil.setbinary(fp) opener = vfsmod.vfs(b'.', False) tr = transaction.transaction( sys.stderr.write, opener, {b'store': opener}, b"undump.journal" ) while True: l = sys.stdin.readline() if not l: break if l.startswith("file:"): f = encoding.strtolocal(l[6:-1]) assert f.endswith(b'.i') r = revlog.revlog( opener, target=(revlog_constants.KIND_OTHER, b'undump-revlog'), radix=f[:-2], ) procutil.stdout.write(b'%s\n' % f) elif l.startswith("node:"): n = bin(l[6:-1]) elif l.startswith("linkrev:"): lr = int(l[9:-1]) elif l.startswith("parents:"): p = l[9:-1].split() p1 = bin(p[0]) p2 = bin(p[1]) elif l.startswith("length:"): length = int(l[8:-1]) sys.stdin.readline() # start marker d = encoding.strtolocal(sys.stdin.read(length)) sys.stdin.readline() # end marker r.addrevision(d, tr, lr, p1, p2) tr.close()