Mercurial > hg
annotate hgext/convert/git.py @ 24760:410f3856196f
tags: change format of tags cache files
.hgtags fnodes are now written to a shared cache file. They don't need
to exist in the per-filter tags cache files. Stop writing them.
The format of the tags cache file has changed in a backwards
incompatible way. This should be acceptable, as we just established
per-filter tags cache files and no client should have per-filter tags
cache files that will need to be read. So no backwards compatbility
concern is present.
The new format has a single header line followed by resolved tags
entries.
The header line is similar to the old first line with a major
difference: we now compute and store a hash of the filtered revisions.
Before, if the set of filtered revs changed, we may return incorrect
results. We now detect that.
A test for verifying filtered rev change is handled properly has been
added.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Thu, 16 Apr 2015 12:01:00 -0400 |
parents | 216fa1ba9993 |
children | 307370c2dda2 |
rev | line source |
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1 # git.py - git support for the convert extension |
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2 # |
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3 # Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 import os |
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9 import subprocess |
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10 from mercurial import util, config |
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11 from mercurial.node import hex, nullid |
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12 from mercurial.i18n import _ |
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13 |
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14 from common import NoRepo, commit, converter_source, checktool |
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15 |
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16 class submodule(object): |
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17 def __init__(self, path, node, url): |
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18 self.path = path |
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19 self.node = node |
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20 self.url = url |
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21 |
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22 def hgsub(self): |
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23 return "%s = [git]%s" % (self.path, self.url) |
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24 |
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25 def hgsubstate(self): |
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26 return "%s %s" % (self.node, self.path) |
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27 |
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28 class convert_git(converter_source): |
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29 # Windows does not support GIT_DIR= construct while other systems |
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30 # cannot remove environment variable. Just assume none have |
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31 # both issues. |
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32 if util.safehasattr(os, 'unsetenv'): |
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33 def gitopen(self, s, err=None): |
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34 prevgitdir = os.environ.get('GIT_DIR') |
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35 os.environ['GIT_DIR'] = self.path |
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36 try: |
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37 if err == subprocess.PIPE: |
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38 (stdin, stdout, stderr) = util.popen3(s) |
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39 return stdout |
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40 elif err == subprocess.STDOUT: |
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41 return self.popen_with_stderr(s) |
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42 else: |
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43 return util.popen(s, 'rb') |
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44 finally: |
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45 if prevgitdir is None: |
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46 del os.environ['GIT_DIR'] |
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47 else: |
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48 os.environ['GIT_DIR'] = prevgitdir |
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49 |
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50 def gitpipe(self, s): |
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51 prevgitdir = os.environ.get('GIT_DIR') |
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52 os.environ['GIT_DIR'] = self.path |
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53 try: |
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54 return util.popen3(s) |
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55 finally: |
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56 if prevgitdir is None: |
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57 del os.environ['GIT_DIR'] |
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58 else: |
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59 os.environ['GIT_DIR'] = prevgitdir |
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60 |
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61 else: |
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62 def gitopen(self, s, err=None): |
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63 if err == subprocess.PIPE: |
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64 (sin, so, se) = util.popen3('GIT_DIR=%s %s' % (self.path, s)) |
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65 return so |
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66 elif err == subprocess.STDOUT: |
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67 return self.popen_with_stderr(s) |
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68 else: |
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69 return util.popen('GIT_DIR=%s %s' % (self.path, s), 'rb') |
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70 |
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71 def gitpipe(self, s): |
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72 return util.popen3('GIT_DIR=%s %s' % (self.path, s)) |
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73 |
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74 def popen_with_stderr(self, s): |
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75 p = subprocess.Popen(s, shell=True, bufsize=-1, |
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76 close_fds=util.closefds, |
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77 stdin=subprocess.PIPE, |
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78 stdout=subprocess.PIPE, |
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79 stderr=subprocess.STDOUT, |
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80 universal_newlines=False, |
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81 env=None) |
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82 return p.stdout |
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83 |
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84 def gitread(self, s): |
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85 fh = self.gitopen(s) |
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86 data = fh.read() |
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87 return data, fh.close() |
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88 |
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89 def __init__(self, ui, path, rev=None): |
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90 super(convert_git, self).__init__(ui, path, rev=rev) |
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91 |
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92 if os.path.isdir(path + "/.git"): |
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93 path += "/.git" |
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94 if not os.path.exists(path + "/objects"): |
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95 raise NoRepo(_("%s does not look like a Git repository") % path) |
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96 |
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97 # The default value (50) is based on the default for 'git diff'. |
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98 similarity = ui.configint('convert', 'git.similarity', default=50) |
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99 if similarity < 0 or similarity > 100: |
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100 raise util.Abort(_('similarity must be between 0 and 100')) |
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101 if similarity > 0: |
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102 self.simopt = '-C%d%%' % similarity |
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103 findcopiesharder = ui.configbool('convert', 'git.findcopiesharder', |
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104 False) |
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105 if findcopiesharder: |
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106 self.simopt += ' --find-copies-harder' |
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107 else: |
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108 self.simopt = '' |
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109 |
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110 checktool('git', 'git') |
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111 |
316 | 112 self.path = path |
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113 self.submodules = [] |
316 | 114 |
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115 self.catfilepipe = self.gitpipe('git cat-file --batch') |
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116 |
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117 def after(self): |
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118 for f in self.catfilepipe: |
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119 f.close() |
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120 |
316 | 121 def getheads(self): |
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122 if not self.rev: |
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123 heads, ret = self.gitread('git rev-parse --branches --remotes') |
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124 heads = heads.splitlines() |
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125 else: |
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126 heads, ret = self.gitread("git rev-parse --verify %s" % self.rev) |
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127 heads = [heads[:-1]] |
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128 if ret: |
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129 raise util.Abort(_('cannot retrieve git heads')) |
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130 return heads |
316 | 131 |
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132 def catfile(self, rev, type): |
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133 if rev == hex(nullid): |
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134 raise IOError |
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135 self.catfilepipe[0].write(rev+'\n') |
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136 self.catfilepipe[0].flush() |
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137 info = self.catfilepipe[1].readline().split() |
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138 if info[1] != type: |
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139 raise util.Abort(_('cannot read %r object at %s') % (type, rev)) |
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140 size = int(info[2]) |
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141 data = self.catfilepipe[1].read(size) |
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142 if len(data) < size: |
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143 raise util.Abort(_('cannot read %r object at %s: unexpected size') |
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144 % (type, rev)) |
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145 # read the trailing newline |
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146 self.catfilepipe[1].read(1) |
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147 return data |
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148 |
316 | 149 def getfile(self, name, rev): |
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150 if rev == hex(nullid): |
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151 return None, None |
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152 if name == '.hgsub': |
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153 data = '\n'.join([m.hgsub() for m in self.submoditer()]) |
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154 mode = '' |
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155 elif name == '.hgsubstate': |
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156 data = '\n'.join([m.hgsubstate() for m in self.submoditer()]) |
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157 mode = '' |
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158 else: |
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159 data = self.catfile(rev, "blob") |
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160 mode = self.modecache[(name, rev)] |
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161 return data, mode |
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162 |
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163 def submoditer(self): |
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164 null = hex(nullid) |
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165 for m in sorted(self.submodules, key=lambda p: p.path): |
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166 if m.node != null: |
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167 yield m |
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168 |
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169 def parsegitmodules(self, content): |
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170 """Parse the formatted .gitmodules file, example file format: |
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171 [submodule "sub"]\n |
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172 \tpath = sub\n |
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173 \turl = git://giturl\n |
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174 """ |
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175 self.submodules = [] |
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176 c = config.config() |
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177 # Each item in .gitmodules starts with \t that cant be parsed |
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178 c.parse('.gitmodules', content.replace('\t','')) |
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179 for sec in c.sections(): |
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180 s = c[sec] |
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181 if 'url' in s and 'path' in s: |
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182 self.submodules.append(submodule(s['path'], '', s['url'])) |
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183 |
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184 def retrievegitmodules(self, version): |
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185 modules, ret = self.gitread("git show %s:%s" % (version, '.gitmodules')) |
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186 if ret: |
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187 raise util.Abort(_('cannot read submodules config file in %s') % |
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188 version) |
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189 self.parsegitmodules(modules) |
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190 for m in self.submodules: |
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191 node, ret = self.gitread("git rev-parse %s:%s" % (version, m.path)) |
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192 if ret: |
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193 continue |
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194 m.node = node.strip() |
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195 |
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196 def getchanges(self, version, full): |
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197 if full: |
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198 raise util.Abort(_("convert from git do not support --full")) |
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199 self.modecache = {} |
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200 fh = self.gitopen("git diff-tree -z --root -m -r %s %s" % ( |
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201 self.simopt, version)) |
316 | 202 changes = [] |
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203 copies = {} |
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204 seen = set() |
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205 entry = None |
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206 subexists = [False] |
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207 subdeleted = [False] |
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208 difftree = fh.read().split('\x00') |
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209 lcount = len(difftree) |
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210 i = 0 |
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211 |
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212 def add(entry, f, isdest): |
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213 seen.add(f) |
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214 h = entry[3] |
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215 p = (entry[1] == "100755") |
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216 s = (entry[1] == "120000") |
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217 renamesource = (not isdest and entry[4][0] == 'R') |
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218 |
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219 if f == '.gitmodules': |
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220 subexists[0] = True |
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221 if entry[4] == 'D' or renamesource: |
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222 subdeleted[0] = True |
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223 changes.append(('.hgsub', hex(nullid))) |
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224 else: |
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225 changes.append(('.hgsub', '')) |
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226 elif entry[1] == '160000' or entry[0] == ':160000': |
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227 subexists[0] = True |
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228 else: |
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229 if renamesource: |
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230 h = hex(nullid) |
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231 self.modecache[(f, h)] = (p and "x") or (s and "l") or "" |
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232 changes.append((f, h)) |
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233 |
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234 while i < lcount: |
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235 l = difftree[i] |
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236 i += 1 |
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237 if not entry: |
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238 if not l.startswith(':'): |
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239 continue |
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240 entry = l.split() |
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241 continue |
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242 f = l |
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243 if f not in seen: |
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244 add(entry, f, False) |
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245 # A file can be copied multiple times, or modified and copied |
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246 # simultaneously. So f can be repeated even if fdest isn't. |
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247 if entry[4][0] in 'RC': |
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248 # rename or copy: next line is the destination |
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249 fdest = difftree[i] |
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250 i += 1 |
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251 if fdest not in seen: |
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252 add(entry, fdest, True) |
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253 # .gitmodules isn't imported at all, so it being copied to |
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254 # and fro doesn't really make sense |
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255 if f != '.gitmodules' and fdest != '.gitmodules': |
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256 copies[fdest] = f |
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257 entry = None |
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258 if fh.close(): |
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259 raise util.Abort(_('cannot read changes in %s') % version) |
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260 |
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261 if subexists[0]: |
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262 if subdeleted[0]: |
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263 changes.append(('.hgsubstate', hex(nullid))) |
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264 else: |
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265 self.retrievegitmodules(version) |
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266 changes.append(('.hgsubstate', '')) |
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267 return (changes, copies, set()) |
316 | 268 |
269 def getcommit(self, version): | |
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270 c = self.catfile(version, "commit") # read the commit hash |
316 | 271 end = c.find("\n\n") |
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272 message = c[end + 2:] |
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273 message = self.recode(message) |
316 | 274 l = c[:end].splitlines() |
275 parents = [] | |
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276 author = committer = None |
316 | 277 for e in l[1:]: |
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278 n, v = e.split(" ", 1) |
316 | 279 if n == "author": |
280 p = v.split() | |
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281 tm, tz = p[-2:] |
316 | 282 author = " ".join(p[:-2]) |
283 if author[0] == "<": author = author[1:-1] | |
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284 author = self.recode(author) |
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285 if n == "committer": |
431 | 286 p = v.split() |
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287 tm, tz = p[-2:] |
431 | 288 committer = " ".join(p[:-2]) |
289 if committer[0] == "<": committer = committer[1:-1] | |
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290 committer = self.recode(committer) |
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291 if n == "parent": |
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292 parents.append(v) |
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293 |
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294 if committer and committer != author: |
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295 message += "\ncommitter: %s\n" % committer |
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296 tzs, tzh, tzm = tz[-5:-4] + "1", tz[-4:-2], tz[-2:] |
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297 tz = -int(tzs) * (int(tzh) * 3600 + int(tzm)) |
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298 date = tm + " " + str(tz) |
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299 |
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300 c = commit(parents=parents, date=date, author=author, desc=message, |
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301 rev=version) |
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302 return c |
316 | 303 |
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304 def numcommits(self): |
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305 return len([None for _ in self.gitopen('git rev-list --all')]) |
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306 |
694 | 307 def gettags(self): |
308 tags = {} | |
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309 alltags = {} |
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310 fh = self.gitopen('git ls-remote --tags "%s"' % self.path, |
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311 err=subprocess.STDOUT) |
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312 prefix = 'refs/tags/' |
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313 |
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314 # Build complete list of tags, both annotated and bare ones |
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315 for line in fh: |
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316 line = line.strip() |
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317 if line.startswith("error:") or line.startswith("fatal:"): |
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318 raise util.Abort(_('cannot read tags from %s') % self.path) |
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319 node, tag = line.split(None, 1) |
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320 if not tag.startswith(prefix): |
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321 continue |
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322 alltags[tag[len(prefix):]] = node |
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323 if fh.close(): |
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324 raise util.Abort(_('cannot read tags from %s') % self.path) |
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325 |
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326 # Filter out tag objects for annotated tag refs |
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327 for tag in alltags: |
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328 if tag.endswith('^{}'): |
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329 tags[tag[:-3]] = alltags[tag] |
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330 else: |
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331 if tag + '^{}' in alltags: |
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332 continue |
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333 else: |
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334 tags[tag] = alltags[tag] |
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335 |
694 | 336 return tags |
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337 |
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338 def getchangedfiles(self, version, i): |
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339 changes = [] |
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340 if i is None: |
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341 fh = self.gitopen("git diff-tree --root -m -r %s" % version) |
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342 for l in fh: |
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343 if "\t" not in l: |
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344 continue |
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345 m, f = l[:-1].split("\t") |
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346 changes.append(f) |
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347 else: |
16683 | 348 fh = self.gitopen('git diff-tree --name-only --root -r %s ' |
349 '"%s^%s" --' % (version, version, i + 1)) | |
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350 changes = [f.rstrip('\n') for f in fh] |
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351 if fh.close(): |
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352 raise util.Abort(_('cannot read changes in %s') % version) |
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353 |
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354 return changes |
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355 |
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356 def getbookmarks(self): |
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357 bookmarks = {} |
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358 |
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359 # Interesting references in git are prefixed |
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360 prefix = 'refs/heads/' |
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361 prefixlen = len(prefix) |
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362 |
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363 # factor two commands |
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364 gitcmd = { 'remote/': 'git ls-remote --heads origin', |
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365 '': 'git show-ref'} |
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366 |
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367 # Origin heads |
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368 for reftype in gitcmd: |
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369 try: |
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370 fh = self.gitopen(gitcmd[reftype], err=subprocess.PIPE) |
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371 for line in fh: |
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372 line = line.strip() |
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373 rev, name = line.split(None, 1) |
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374 if not name.startswith(prefix): |
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375 continue |
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376 name = '%s%s' % (reftype, name[prefixlen:]) |
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377 bookmarks[name] = rev |
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378 except Exception: |
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379 pass |
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380 |
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381 return bookmarks |
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382 |
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383 def checkrevformat(self, revstr, mapname='splicemap'): |
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384 """ git revision string is a 40 byte hex """ |
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385 self.checkhexformat(revstr, mapname) |