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annotate tests/testlib/sigpipe-remote.py @ 47636:b2ed9480b34a

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sigpipe-remote: check for python version earlier in the script The should abort early, using the wrong python is a pretty bad sign. Differential Revision: https://phab.mercurial-scm.org/D11078
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Sun, 11 Jul 2021 15:40:06 +0200
parents 27ff81547d35
children d0c0d7b98014
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python3
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2 from __future__ import print_function
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3
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4 import io
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5 import os
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6 import subprocess
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7 import sys
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8 import time
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9
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10 # we cannot use mercurial.testing as long as python2 is not dropped as the test
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11 # will only install the mercurial module for python2 in python2 run
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12 if sys.version_info[0] < 3:
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13 print('SIGPIPE-HELPER: script should run with Python 3', file=sys.stderr)
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14 sys.exit(255)
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16 if isinstance(sys.stdout.buffer, io.BufferedWriter):
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17 print('SIGPIPE-HELPER: script need unbuffered output', file=sys.stderr)
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18 sys.exit(255)
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20 DEBUG_FILE = os.environ.get('SIGPIPE_REMOTE_DEBUG_FILE')
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21 if DEBUG_FILE is None:
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22 debug_stream = sys.stderr.buffer
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23 else:
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24 debug_stream = open(DEBUG_FILE, 'bw', buffering=0)
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25
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26 SYNCFILE1 = os.environ.get('SYNCFILE1')
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27 SYNCFILE2 = os.environ.get('SYNCFILE2')
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28 if SYNCFILE1 is None:
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29 print('SIGPIPE-HELPER: missing variable $SYNCFILE1', file=sys.stderr)
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30 sys.exit(255)
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31 if SYNCFILE2 is None:
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32 print('SIGPIPE-HELPER: missing variable $SYNCFILE2', file=sys.stderr)
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33 sys.exit(255)
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34
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36 def _timeout_factor():
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37 """return the current modification to timeout"""
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38 default = int(os.environ.get('HGTEST_TIMEOUT_DEFAULT', 360))
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39 current = int(os.environ.get('HGTEST_TIMEOUT', default))
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40 if current == 0:
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41 return 1
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42 return current / float(default)
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45 def wait_file(path, timeout=10):
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46 timeout *= _timeout_factor()
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47 start = time.time()
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48 while not os.path.exists(path):
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49 if (time.time() - start) > timeout:
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50 raise RuntimeError(b"timed out waiting for file: %s" % path)
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51 time.sleep(0.01)
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53
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54 def write_file(path, content=b''):
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55 with open(path, 'wb') as f:
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56 f.write(content)
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57
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59 # end of mercurial.testing content
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60
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62 def sysbytes(s):
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63 return s.encode('utf-8')
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64
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65
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66 def sysstr(s):
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67 return s.decode('latin-1')
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68
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70 debug_stream.write(b'SIGPIPE-HELPER: Starting\n')
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71
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72 TESTLIB_DIR = os.path.dirname(sys.argv[0])
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73 WAIT_SCRIPT = os.path.join(TESTLIB_DIR, 'wait-on-file')
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74
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75 hooks_cmd = '%s 10 %s %s'
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76 hooks_cmd %= (
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77 WAIT_SCRIPT,
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78 SYNCFILE2,
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79 SYNCFILE1,
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80 )
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81
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82 try:
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83 cmd = ['hg']
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84 cmd += sys.argv[1:]
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85 sub = subprocess.Popen(
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86 cmd,
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87 bufsize=0,
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88 close_fds=True,
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89 stdin=sys.stdin,
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90 stdout=subprocess.PIPE,
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91 stderr=subprocess.PIPE,
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92 )
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94 basedir = os.path.dirname(sys.argv[0])
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95 worker = os.path.join(basedir, 'sigpipe-worker.py')
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97 cmd = [sys.executable, worker]
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99 stdout_worker = subprocess.Popen(
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100 cmd,
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101 bufsize=0,
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102 close_fds=True,
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103 stdin=sub.stdout,
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104 stdout=sys.stdout,
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105 stderr=sys.stderr,
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106 )
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108 stderr_worker = subprocess.Popen(
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109 cmd,
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110 bufsize=0,
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111 close_fds=True,
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112 stdin=sub.stderr,
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113 stdout=sys.stderr,
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114 stderr=sys.stderr,
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115 )
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116 debug_stream.write(b'SIGPIPE-HELPER: Redirection in place\n')
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117 os.close(sub.stdout.fileno())
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118 os.close(sub.stderr.fileno())
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119 debug_stream.write(b'SIGPIPE-HELPER: pipes closed in main\n')
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120
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121 try:
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122 wait_file(sysbytes(SYNCFILE1))
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123 except RuntimeError as exc:
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124 msg = sysbytes(str(exc))
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125 debug_stream.write(b'SIGPIPE-HELPER: wait failed: %s\n' % msg)
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126 else:
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127 debug_stream.write(b'SIGPIPE-HELPER: SYNCFILE1 detected\n')
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128 stdout_worker.kill()
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129 stderr_worker.kill()
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130 stdout_worker.wait(10)
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131 stderr_worker.wait(10)
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132 debug_stream.write(b'SIGPIPE-HELPER: worker killed\n')
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133
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134 debug_stream.write(b'SIGPIPE-HELPER: creating SYNCFILE2\n')
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135 write_file(sysbytes(SYNCFILE2))
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136 finally:
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137 debug_stream.write(b'SIGPIPE-HELPER: Shutting down\n')
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138 if not sys.stdin.closed:
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139 sys.stdin.close()
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140 try:
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141 sub.wait(timeout=30)
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142 except subprocess.TimeoutExpired:
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143 msg = b'SIGPIPE-HELPER: Server process failed to terminate\n'
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144 debug_stream.write(msg)
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145 sub.kill()
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146 sub.wait()
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147 msg = b'SIGPIPE-HELPER: Server process killed\n'
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148 else:
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149 msg = b'SIGPIPE-HELPER: Server process terminated with status %d\n'
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150 msg %= sub.returncode
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151 debug_stream.write(msg)
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152 debug_stream.write(b'SIGPIPE-HELPER: Shut down\n')