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bos@67
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1 #!/usr/bin/env python
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bos@4
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2 #
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bos@4
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3 # This program takes something that resembles a shell script and runs
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4 # it, spitting input (commands from the script) and output into text
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5 # files, for use in examples.
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bos@3
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6
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bos@3
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7 import cStringIO
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bos@73
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8 import errno
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bos@78
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9 import getopt
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bos@3
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10 import os
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11 import pty
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12 import re
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bos@79
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13 import select
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14 import shutil
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bos@6
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15 import signal
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bos@36
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16 import stat
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17 import sys
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18 import tempfile
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19 import time
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20
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21 tex_subs = {
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22 '\\': '\\textbackslash{}',
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23 '{': '\\{',
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bos@77
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24 '}': '\\}',
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25 }
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bos@77
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26
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bos@77
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27 def gensubs(s):
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28 start = 0
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bos@77
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29 for i, c in enumerate(s):
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30 sub = tex_subs.get(c)
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31 if sub:
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32 yield s[start:i]
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33 start = i + 1
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34 yield sub
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bos@77
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35 yield s[start:]
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36
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bos@4
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37 def tex_escape(s):
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bos@77
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38 return ''.join(gensubs(s))
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39
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40 def maybe_unlink(name):
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41 try:
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42 os.unlink(name)
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bos@137
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43 return True
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bos@137
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44 except OSError, err:
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45 if err.errno != errno.ENOENT:
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46 raise
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bos@137
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47 return False
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bos@137
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48
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bos@3
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49 class example:
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bos@70
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50 shell = '/usr/bin/env bash'
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bos@103
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51 ps1 = '__run_example_ps1__ '
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52 ps2 = '__run_example_ps2__ '
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53 pi_re = re.compile(r'#\$\s*(name|ignore):\s*(.*)$')
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54
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55 timeout = 5
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bos@79
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56
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bos@78
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57 def __init__(self, name, verbose):
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bos@3
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58 self.name = name
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59 self.verbose = verbose
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60 self.poll = select.poll()
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bos@3
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61
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bos@3
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62 def parse(self):
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bos@4
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63 '''yield each hunk of input from the file.'''
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bos@3
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64 fp = open(self.name)
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bos@3
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65 cfp = cStringIO.StringIO()
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bos@3
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66 for line in fp:
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67 cfp.write(line)
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68 if not line.rstrip().endswith('\\'):
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69 yield cfp.getvalue()
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70 cfp.seek(0)
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bos@3
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71 cfp.truncate()
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bos@3
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72
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bos@3
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73 def status(self, s):
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bos@3
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74 sys.stdout.write(s)
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75 if not s.endswith('\n'):
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76 sys.stdout.flush()
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bos@3
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77
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bos@6
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78 def send(self, s):
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bos@78
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79 if self.verbose:
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bos@78
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80 print >> sys.stderr, '>', self.debugrepr(s)
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bos@73
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81 while s:
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82 count = os.write(self.cfd, s)
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83 s = s[count:]
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bos@6
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84
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bos@78
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85 def debugrepr(self, s):
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86 rs = repr(s)
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bos@78
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87 limit = 60
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bos@78
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88 if len(rs) > limit:
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bos@78
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89 return ('%s%s ... [%d bytes]' % (rs[:limit], rs[0], len(s)))
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90 else:
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91 return rs
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92
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bos@79
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93 timeout = 5
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bos@79
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94
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bos@79
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95 def read(self):
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bos@79
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96 events = self.poll.poll(self.timeout * 1000)
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bos@79
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97 if not events:
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bos@79
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98 print >> sys.stderr, '[timed out after %d seconds]' % self.timeout
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bos@79
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99 os.kill(self.pid, signal.SIGHUP)
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bos@79
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100 return ''
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bos@79
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101 return os.read(self.cfd, 1024)
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102
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bos@6
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103 def receive(self):
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104 out = cStringIO.StringIO()
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bos@4
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105 while True:
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bos@73
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106 try:
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bos@78
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107 if self.verbose:
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108 sys.stderr.write('< ')
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bos@79
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109 s = self.read()
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bos@73
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110 except OSError, err:
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111 if err.errno == errno.EIO:
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112 return '', ''
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113 raise
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bos@78
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114 if self.verbose:
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115 print >> sys.stderr, self.debugrepr(s)
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116 out.write(s)
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117 s = out.getvalue()
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bos@103
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118 if s.endswith(self.ps1):
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119 return self.ps1, s.replace('\r\n', '\n')[:-len(self.ps1)]
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120 if s.endswith(self.ps2):
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121 return self.ps2, s.replace('\r\n', '\n')[:-len(self.ps2)]
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122
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bos@6
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123 def sendreceive(self, s):
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bos@6
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124 self.send(s)
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bos@103
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125 ps, r = self.receive()
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bos@6
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126 if r.startswith(s):
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127 r = r[len(s):]
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128 return ps, r
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129
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bos@3
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130 def run(self):
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131 ofp = None
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132 basename = os.path.basename(self.name)
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133 self.status('running %s ' % basename)
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134 tmpdir = tempfile.mkdtemp(prefix=basename)
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bos@78
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135
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bos@136
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136 # remove the marker file that we tell make to use to see if
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137 # this run succeeded
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bos@137
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138 maybe_unlink(self.name + '.run')
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bos@136
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139
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bos@78
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140 rcfile = os.path.join(tmpdir, '.hgrc')
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bos@78
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141 rcfp = open(rcfile, 'w')
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bos@78
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142 print >> rcfp, '[ui]'
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bos@78
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143 print >> rcfp, "username = Bryan O'Sullivan <bos@serpentine.com>"
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144
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bos@6
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145 rcfile = os.path.join(tmpdir, '.bashrc')
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146 rcfp = open(rcfile, 'w')
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bos@103
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147 print >> rcfp, 'PS1="%s"' % self.ps1
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148 print >> rcfp, 'PS2="%s"' % self.ps2
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bos@6
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149 print >> rcfp, 'unset HISTFILE'
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bos@19
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150 print >> rcfp, 'export EXAMPLE_DIR="%s"' % os.getcwd()
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bos@124
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151 print >> rcfp, 'export HGMERGE=merge'
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bos@6
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152 print >> rcfp, 'export LANG=C'
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bos@6
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153 print >> rcfp, 'export LC_ALL=C'
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bos@6
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154 print >> rcfp, 'export TZ=GMT'
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bos@6
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155 print >> rcfp, 'export HGRC="%s/.hgrc"' % tmpdir
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bos@6
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156 print >> rcfp, 'export HGRCPATH=$HGRC'
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bos@6
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157 print >> rcfp, 'cd %s' % tmpdir
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bos@6
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158 rcfp.close()
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bos@68
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159 sys.stdout.flush()
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160 sys.stderr.flush()
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bos@79
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161 self.pid, self.cfd = pty.fork()
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bos@79
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162 if self.pid == 0:
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bos@70
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163 cmdline = ['/usr/bin/env', 'bash', '--noediting', '--noprofile',
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bos@70
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164 '--norc']
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bos@68
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165 try:
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bos@68
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166 os.execv(cmdline[0], cmdline)
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167 except OSError, err:
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168 print >> sys.stderr, '%s: %s' % (cmdline[0], err.strerror)
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bos@68
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169 sys.stderr.flush()
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170 os._exit(0)
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bos@79
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171 self.poll.register(self.cfd, select.POLLIN | select.POLLERR |
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bos@79
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172 select.POLLHUP)
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bos@103
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173
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bos@103
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174 prompts = {
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175 '': '',
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bos@103
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176 self.ps1: '$',
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177 self.ps2: '>',
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178 }
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bos@103
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179
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bos@137
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180 ignore = [
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bos@137
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181 r'\d+:[0-9a-f]{12}', # changeset number:hash
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bos@137
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182 r'^(?:---|\+\+\+) .*', # diff header with dates
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183 r'^date:.*', # date
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184 r'^diff -r.*', # "diff -r" is followed by hash
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185 ]
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bos@137
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186
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187 try:
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bos@71
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188 try:
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bos@73
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189 # eat first prompt string from shell
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190 self.read()
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bos@71
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191 # setup env and prompt
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192 ps, output = self.sendreceive('source %s\n' % rcfile)
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bos@71
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193 for hunk in self.parse():
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194 # is this line a processing instruction?
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195 m = self.pi_re.match(hunk)
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196 if m:
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197 pi, rest = m.groups()
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bos@71
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198 if pi == 'name':
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199 self.status('.')
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200 out = rest
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bos@71
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201 assert os.sep not in out
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bos@137
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202 if ofp is not None:
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bos@137
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203 ofp.close()
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bos@137
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204 self.rename_output(ofp_basename, ignore)
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bos@71
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205 if out:
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bos@137
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206 ofp_basename = '%s.%s' % (self.name, out)
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207 ofp = open(ofp_basename + '.tmp', 'w')
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bos@71
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208 else:
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bos@71
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209 ofp = None
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bos@137
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210 elif pi == 'ignore':
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211 ignore.append(rest)
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bos@71
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212 elif hunk.strip():
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bos@71
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213 # it's something we should execute
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bos@103
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214 newps, output = self.sendreceive(hunk)
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bos@71
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215 if not ofp:
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216 continue
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bos@71
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217 # first, print the command we ran
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bos@71
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218 if not hunk.startswith('#'):
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219 nl = hunk.endswith('\n')
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bos@103
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220 hunk = ('%s \\textbf{%s}' %
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221 (prompts[ps],
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222 tex_escape(hunk.rstrip('\n'))))
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223 if nl: hunk += '\n'
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224 ofp.write(hunk)
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bos@71
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225 # then its output
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bos@71
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226 ofp.write(tex_escape(output))
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bos@103
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227 ps = newps
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bos@71
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228 self.status('\n')
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bos@71
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229 except:
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bos@72
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230 print >> sys.stderr, '(killed)'
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bos@79
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231 os.kill(self.pid, signal.SIGKILL)
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bos@72
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232 pid, rc = os.wait()
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bos@71
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233 raise
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bos@72
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234 else:
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bos@71
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235 try:
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bos@103
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236 ps, output = self.sendreceive('exit\n')
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bos@71
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237 if ofp:
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bos@71
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238 ofp.write(output)
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bos@73
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239 os.close(self.cfd)
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bos@71
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240 except IOError:
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bos@71
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241 pass
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bos@79
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242 os.kill(self.pid, signal.SIGTERM)
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bos@72
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243 pid, rc = os.wait()
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bos@72
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244 if rc:
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bos@72
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245 if os.WIFEXITED(rc):
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bos@72
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246 print >> sys.stderr, '(exit %s)' % os.WEXITSTATUS(rc)
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bos@72
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247 elif os.WIFSIGNALED(rc):
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bos@72
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248 print >> sys.stderr, '(signal %s)' % os.WTERMSIG(rc)
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bos@136
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249 else:
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bos@136
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250 open(self.name + '.run', 'w')
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bos@72
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251 return rc
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bos@72
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252 finally:
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bos@4
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253 shutil.rmtree(tmpdir)
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bos@3
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254
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bos@137
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255 def rename_output(self, base, ignore):
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bos@137
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256 mangle_re = re.compile('(?:' + '|'.join(ignore) + ')')
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bos@137
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257 def mangle(s):
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bos@137
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258 return mangle_re.sub('', s)
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bos@137
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259 def matchfp(fp1, fp2):
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bos@137
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260 while True:
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bos@137
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261 s1 = mangle(fp1.readline())
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bos@137
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262 s2 = mangle(fp2.readline())
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bos@137
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263 if cmp(s1, s2):
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bos@137
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264 break
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bos@137
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265 if not s1:
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bos@137
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266 return True
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bos@137
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267 return False
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bos@137
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268
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bos@137
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269 oldname = base + '.out'
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bos@137
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270 tmpname = base + '.tmp'
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bos@137
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271 errname = base + '.err'
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bos@137
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272 errfp = open(errname, 'w+')
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bos@137
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273 for line in open(tmpname):
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bos@137
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274 errfp.write(mangle_re.sub('', line))
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bos@137
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275 os.unlink(tmpname)
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bos@137
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276 errfp.seek(0)
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bos@137
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277 try:
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bos@137
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278 oldfp = open(oldname)
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bos@137
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279 except IOError, err:
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bos@137
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280 if err.errno != errno.ENOENT:
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bos@137
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281 raise
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bos@137
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282 os.rename(errname, oldname)
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bos@137
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283 return
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bos@137
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284 if matchfp(oldfp, errfp):
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bos@137
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285 os.unlink(errname)
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bos@137
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286 else:
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bos@137
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287 print >> sys.stderr, '\nOutput of %s has changed!' % base
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bos@137
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288 os.system('diff -u %s %s 1>&2' % (oldname, errname))
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bos@137
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289
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bos@3
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290 def main(path='.'):
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bos@78
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291 opts, args = getopt.getopt(sys.argv[1:], 'v', ['verbose'])
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bos@78
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292 verbose = False
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bos@78
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293 for o, a in opts:
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bos@78
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294 if o in ('-v', '--verbose'):
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bos@78
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295 verbose = True
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bos@71
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296 errs = 0
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bos@3
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297 if args:
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bos@3
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298 for a in args:
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bos@75
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299 try:
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bos@75
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300 st = os.lstat(a)
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bos@75
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301 except OSError, err:
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bos@75
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302 print >> sys.stderr, '%s: %s' % (a, err.strerror)
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bos@75
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303 errs += 1
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bos@75
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304 continue
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bos@75
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305 if stat.S_ISREG(st.st_mode) and st.st_mode & 0111:
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bos@78
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306 if example(a, verbose).run():
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bos@75
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307 errs += 1
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bos@75
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308 else:
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bos@75
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309 print >> sys.stderr, '%s: not a file, or not executable' % a
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bos@71
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310 errs += 1
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bos@71
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311 return errs
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bos@3
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312 for name in os.listdir(path):
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bos@3
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313 if name == 'run-example' or name.startswith('.'): continue
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bos@3
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314 if name.endswith('.out') or name.endswith('~'): continue
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bos@45
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315 if name.endswith('.run'): continue
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bos@19
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316 pathname = os.path.join(path, name)
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bos@36
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317 st = os.lstat(pathname)
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bos@36
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318 if stat.S_ISREG(st.st_mode) and st.st_mode & 0111:
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bos@78
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319 if example(pathname, verbose).run():
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bos@71
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320 errs += 1
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bos@4
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321 print >> open(os.path.join(path, '.run'), 'w'), time.asctime()
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bos@71
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322 return errs
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bos@3
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323
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bos@3
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324 if __name__ == '__main__':
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bos@71
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325 sys.exit(main())
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