contrib/hgclient.py
author Pierre-Yves David <pierre-yves.david@fb.com>
Sun, 17 May 2015 17:58:39 -0700
changeset 25144 81a395447b34
parent 22993 24c5fd2894f8
child 28355 897a4bbd578b
permissions -rw-r--r--
revset: use 'next()' to detect end of iteration in 'limit' The 'next()' built-in can return a default value, allow to get rid of the confusing try/except code flow.
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# A minimal client for Mercurial's command server
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import os, sys, signal, struct, socket, subprocess, time, cStringIO
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def connectpipe(path=None):
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    cmdline = ['hg', 'serve', '--cmdserver', 'pipe']
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    if path:
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        cmdline += ['-R', path]
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    server = subprocess.Popen(cmdline, stdin=subprocess.PIPE,
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                              stdout=subprocess.PIPE)
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    return server
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class unixconnection(object):
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    def __init__(self, sockpath):
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        self.sock = sock = socket.socket(socket.AF_UNIX)
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        sock.connect(sockpath)
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        self.stdin = sock.makefile('wb')
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        self.stdout = sock.makefile('rb')
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    def wait(self):
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        self.stdin.close()
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        self.stdout.close()
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        self.sock.close()
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class unixserver(object):
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    def __init__(self, sockpath, logpath=None, repopath=None):
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        self.sockpath = sockpath
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        cmdline = ['hg', 'serve', '--cmdserver', 'unix', '-a', sockpath]
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        if repopath:
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            cmdline += ['-R', repopath]
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        if logpath:
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            stdout = open(logpath, 'a')
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            stderr = subprocess.STDOUT
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        else:
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            stdout = stderr = None
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        self.server = subprocess.Popen(cmdline, stdout=stdout, stderr=stderr)
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        # wait for listen()
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        while self.server.poll() is None:
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            if os.path.exists(sockpath):
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                break
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            time.sleep(0.1)
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    def connect(self):
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        return unixconnection(self.sockpath)
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    def shutdown(self):
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        os.kill(self.server.pid, signal.SIGTERM)
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        self.server.wait()
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def writeblock(server, data):
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    server.stdin.write(struct.pack('>I', len(data)))
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    server.stdin.write(data)
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    server.stdin.flush()
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def readchannel(server):
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    data = server.stdout.read(5)
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    if not data:
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        raise EOFError
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    channel, length = struct.unpack('>cI', data)
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    if channel in 'IL':
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        return channel, length
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    else:
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        return channel, server.stdout.read(length)
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def sep(text):
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    return text.replace('\\', '/')
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def runcommand(server, args, output=sys.stdout, error=sys.stderr, input=None,
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               outfilter=lambda x: x):
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    print '*** runcommand', ' '.join(args)
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    sys.stdout.flush()
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    server.stdin.write('runcommand\n')
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    writeblock(server, '\0'.join(args))
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    if not input:
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        input = cStringIO.StringIO()
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    while True:
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        ch, data = readchannel(server)
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        if ch == 'o':
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            output.write(outfilter(data))
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            output.flush()
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        elif ch == 'e':
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            error.write(data)
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            error.flush()
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        elif ch == 'I':
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            writeblock(server, input.read(data))
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        elif ch == 'L':
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            writeblock(server, input.readline(data))
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        elif ch == 'r':
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            ret, = struct.unpack('>i', data)
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            if ret != 0:
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                print ' [%d]' % ret
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            return ret
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        else:
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            print "unexpected channel %c: %r" % (ch, data)
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            if ch.isupper():
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                return
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def check(func, connect=connectpipe):
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    sys.stdout.flush()
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    server = connect()
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    try:
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        return func(server)
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    finally:
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        server.stdin.close()
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        server.wait()