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annotate contrib/hgclient.py @ 28355:897a4bbd578b

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hgclient: use absolute_import and print_function
author Pulkit Goyal <7895pulkit@gmail.com>
date Sun, 06 Mar 2016 03:15:45 +0530
parents 24c5fd2894f8
children 3f45488d70df
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1 # A minimal client for Mercurial's command server
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2
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3 from __future__ import absolute_import, print_function
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4 import cStringIO
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5 import os
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6 import signal
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7 import socket
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8 import struct
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9 import subprocess
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10 import sys
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11 import time
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12
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13 def connectpipe(path=None):
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14 cmdline = ['hg', 'serve', '--cmdserver', 'pipe']
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15 if path:
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16 cmdline += ['-R', path]
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17
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18 server = subprocess.Popen(cmdline, stdin=subprocess.PIPE,
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19 stdout=subprocess.PIPE)
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20
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21 return server
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22
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23 class unixconnection(object):
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24 def __init__(self, sockpath):
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25 self.sock = sock = socket.socket(socket.AF_UNIX)
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26 sock.connect(sockpath)
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27 self.stdin = sock.makefile('wb')
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28 self.stdout = sock.makefile('rb')
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29
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30 def wait(self):
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31 self.stdin.close()
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32 self.stdout.close()
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33 self.sock.close()
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34
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35 class unixserver(object):
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36 def __init__(self, sockpath, logpath=None, repopath=None):
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37 self.sockpath = sockpath
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38 cmdline = ['hg', 'serve', '--cmdserver', 'unix', '-a', sockpath]
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39 if repopath:
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40 cmdline += ['-R', repopath]
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41 if logpath:
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42 stdout = open(logpath, 'a')
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43 stderr = subprocess.STDOUT
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44 else:
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45 stdout = stderr = None
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46 self.server = subprocess.Popen(cmdline, stdout=stdout, stderr=stderr)
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47 # wait for listen()
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48 while self.server.poll() is None:
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49 if os.path.exists(sockpath):
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50 break
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51 time.sleep(0.1)
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52
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53 def connect(self):
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54 return unixconnection(self.sockpath)
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55
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56 def shutdown(self):
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57 os.kill(self.server.pid, signal.SIGTERM)
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58 self.server.wait()
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59
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60 def writeblock(server, data):
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61 server.stdin.write(struct.pack('>I', len(data)))
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62 server.stdin.write(data)
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63 server.stdin.flush()
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64
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65 def readchannel(server):
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66 data = server.stdout.read(5)
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67 if not data:
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68 raise EOFError
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69 channel, length = struct.unpack('>cI', data)
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70 if channel in 'IL':
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71 return channel, length
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72 else:
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73 return channel, server.stdout.read(length)
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74
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75 def sep(text):
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76 return text.replace('\\', '/')
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77
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78 def runcommand(server, args, output=sys.stdout, error=sys.stderr, input=None,
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79 outfilter=lambda x: x):
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80 print('*** runcommand', ' '.join(args))
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81 sys.stdout.flush()
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82 server.stdin.write('runcommand\n')
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83 writeblock(server, '\0'.join(args))
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84
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85 if not input:
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86 input = cStringIO.StringIO()
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87
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88 while True:
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89 ch, data = readchannel(server)
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90 if ch == 'o':
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91 output.write(outfilter(data))
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92 output.flush()
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93 elif ch == 'e':
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94 error.write(data)
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95 error.flush()
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96 elif ch == 'I':
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97 writeblock(server, input.read(data))
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98 elif ch == 'L':
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99 writeblock(server, input.readline(data))
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100 elif ch == 'r':
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101 ret, = struct.unpack('>i', data)
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102 if ret != 0:
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103 print(' [%d]' % ret)
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104 return ret
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105 else:
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106 print("unexpected channel %c: %r" % (ch, data))
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107 if ch.isupper():
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108 return
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109
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110 def check(func, connect=connectpipe):
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111 sys.stdout.flush()
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112 server = connect()
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113 try:
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114 return func(server)
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115 finally:
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116 server.stdin.close()
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117 server.wait()