Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/patch.py @ 2865:71e78f2ca5ae

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merge git patch code.
author Vadim Gelfer <vadim.gelfer@gmail.com>
date Sat, 12 Aug 2006 12:47:18 -0700
parents f3c68e0ca37d
children 2893e51407a4
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2861
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1 # patch.py - patch file parsing routines
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2 #
2865
71e78f2ca5ae merge git patch code.
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3 # Copyright 2006 Brendan Cully <brendan@kublai.com>
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4 #
2861
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5 # This software may be used and distributed according to the terms
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6 # of the GNU General Public License, incorporated herein by reference.
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7
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8 from demandload import demandload
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9 demandload(globals(), "util")
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10 demandload(globals(), "os re shutil tempfile")
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11
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12 def readgitpatch(patchname):
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13 """extract git-style metadata about patches from <patchname>"""
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14 class gitpatch:
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15 "op is one of ADD, DELETE, RENAME, MODIFY or COPY"
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16 def __init__(self, path):
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17 self.path = path
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18 self.oldpath = None
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19 self.mode = None
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20 self.op = 'MODIFY'
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21 self.copymod = False
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22 self.lineno = 0
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23
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24 # Filter patch for git information
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25 gitre = re.compile('diff --git a/(.*) b/(.*)')
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26 pf = file(patchname)
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27 gp = None
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28 gitpatches = []
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29 # Can have a git patch with only metadata, causing patch to complain
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30 dopatch = False
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31
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32 lineno = 0
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33 for line in pf:
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34 lineno += 1
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35 if line.startswith('diff --git'):
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36 m = gitre.match(line)
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37 if m:
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38 if gp:
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39 gitpatches.append(gp)
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40 src, dst = m.group(1,2)
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41 gp = gitpatch(dst)
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42 gp.lineno = lineno
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43 elif gp:
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44 if line.startswith('--- '):
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45 if gp.op in ('COPY', 'RENAME'):
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46 gp.copymod = True
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47 dopatch = 'filter'
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48 gitpatches.append(gp)
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49 gp = None
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50 if not dopatch:
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51 dopatch = True
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52 continue
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53 if line.startswith('rename from '):
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54 gp.op = 'RENAME'
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55 gp.oldpath = line[12:].rstrip()
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56 elif line.startswith('rename to '):
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57 gp.path = line[10:].rstrip()
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58 elif line.startswith('copy from '):
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59 gp.op = 'COPY'
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60 gp.oldpath = line[10:].rstrip()
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61 elif line.startswith('copy to '):
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62 gp.path = line[8:].rstrip()
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63 elif line.startswith('deleted file'):
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64 gp.op = 'DELETE'
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65 elif line.startswith('new file mode '):
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66 gp.op = 'ADD'
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67 gp.mode = int(line.rstrip()[-3:], 8)
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68 elif line.startswith('new mode '):
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69 gp.mode = int(line.rstrip()[-3:], 8)
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70 if gp:
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71 gitpatches.append(gp)
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72
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73 if not gitpatches:
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74 dopatch = True
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75
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76 return (dopatch, gitpatches)
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77
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78 def dogitpatch(patchname, gitpatches):
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79 """Preprocess git patch so that vanilla patch can handle it"""
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80 pf = file(patchname)
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81 pfline = 1
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82
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83 fd, patchname = tempfile.mkstemp(prefix='hg-patch-')
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84 tmpfp = os.fdopen(fd, 'w')
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85
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86 try:
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87 for i in range(len(gitpatches)):
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88 p = gitpatches[i]
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89 if not p.copymod:
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90 continue
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91
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92 if os.path.exists(p.path):
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93 raise util.Abort(_("cannot create %s: destination already exists") %
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94 p.path)
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95
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96 (src, dst) = [os.path.join(os.getcwd(), n)
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97 for n in (p.oldpath, p.path)]
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98
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99 targetdir = os.path.dirname(dst)
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100 if not os.path.isdir(targetdir):
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101 os.makedirs(targetdir)
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102 try:
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103 shutil.copyfile(src, dst)
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104 shutil.copymode(src, dst)
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105 except shutil.Error, inst:
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106 raise util.Abort(str(inst))
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107
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108 # rewrite patch hunk
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109 while pfline < p.lineno:
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110 tmpfp.write(pf.readline())
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111 pfline += 1
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112 tmpfp.write('diff --git a/%s b/%s\n' % (p.path, p.path))
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113 line = pf.readline()
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114 pfline += 1
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115 while not line.startswith('--- a/'):
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116 tmpfp.write(line)
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117 line = pf.readline()
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118 pfline += 1
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119 tmpfp.write('--- a/%s\n' % p.path)
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120
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121 line = pf.readline()
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122 while line:
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123 tmpfp.write(line)
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124 line = pf.readline()
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125 except:
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126 tmpfp.close()
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127 os.unlink(patchname)
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128 raise
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129
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130 tmpfp.close()
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131 return patchname
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132
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133 def patch(strip, patchname, ui, cwd=None):
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134 """apply the patch <patchname> to the working directory.
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135 a list of patched files is returned"""
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136
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137 (dopatch, gitpatches) = readgitpatch(patchname)
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138
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139 files = {}
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140 if dopatch:
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141 if dopatch == 'filter':
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142 patchname = dogitpatch(patchname, gitpatches)
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143 patcher = util.find_in_path('gpatch', os.environ.get('PATH', ''), 'patch')
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144 args = []
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145 if cwd:
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146 args.append('-d %s' % util.shellquote(cwd))
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147 fp = os.popen('%s %s -p%d < %s' % (patcher, ' '.join(args), strip,
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148 util.shellquote(patchname)))
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149
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150 if dopatch == 'filter':
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151 False and os.unlink(patchname)
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152
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153 for line in fp:
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154 line = line.rstrip()
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155 ui.status("%s\n" % line)
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156 if line.startswith('patching file '):
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157 pf = util.parse_patch_output(line)
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158 files.setdefault(pf, (None, None))
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159 code = fp.close()
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160 if code:
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161 raise util.Abort(_("patch command failed: %s") % explain_exit(code)[0])
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162
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163 for gp in gitpatches:
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164 files[gp.path] = (gp.op, gp)
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165
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166 return files