Mercurial > hg
view contrib/fixpax.py @ 30619:88efb4fb1975
chgserver: truncate base address at "." for hash address
Previously, the hash address is just appending "-$HASH" to base address.
This patch makes it truncate the basename address at "." before appending
"-$HASH".
This makes it possible to spawn new servers in a racy situation and the
client could be sure the server it connects is the new server just spawned.
This is a step towards removing the lock.
One of the functionalities of the lock is to make sure the connect will
connect to a server it just created:
1. start server --address foo
2. connect to foo # wish "foo" is the server just started
With this change, the client could do:
1. start server --address foo.tmp$PID
2. connect to foo.tmp$PID # is the server just started
(note: if it is not, it does not affect correctness - linux pid
namespace is not a concern here)
3. rename foo.tmp$PID to foo
Another functionality of the lock is to avoid starting multiple servers with
a same confighash in parallel. But that also prevents starting multiple
servers with different confighashes in parallel.
author | Jun Wu <quark@fb.com> |
---|---|
date | Mon, 19 Dec 2016 22:07:41 +0000 |
parents | 00f317788d33 |
children |
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#!/usr/bin/env python # fixpax - fix ownership in bdist_mpkg output # # Copyright 2015 Matt Mackall <mpm@selenic.com> # # This software may be used and distributed according to the terms of the # MIT license (http://opensource.org/licenses/MIT) """Set file ownership to 0 in an Archive.pax.gz. Suitable for fixing files bdist_mpkg output: *.mpkg/Contents/Packages/*.pkg/Contents/Archive.pax.gz """ from __future__ import absolute_import, print_function import gzip import os import sys def fixpax(iname, oname): i = gzip.GzipFile(iname) o = gzip.GzipFile(oname, "w") while True: magic = i.read(6) dev = i.read(6) ino = i.read(6) mode = i.read(6) i.read(6) # uid i.read(6) # gid nlink = i.read(6) rdev = i.read(6) mtime = i.read(11) namesize = i.read(6) filesize = i.read(11) name = i.read(int(namesize, 8)) data = i.read(int(filesize, 8)) o.write(magic) o.write(dev) o.write(ino) o.write(mode) o.write("000000") o.write("000000") o.write(nlink) o.write(rdev) o.write(mtime) o.write(namesize) o.write(filesize) o.write(name) o.write(data) if name.startswith("TRAILER!!!"): o.write(i.read()) break o.close() i.close() if __name__ == '__main__': for iname in sys.argv[1:]: print('fixing file ownership in %s' % iname) oname = sys.argv[1] + '.tmp' fixpax(iname, oname) os.rename(oname, iname)