Mercurial > hg
annotate hgext/convert/git.py @ 25748:baea47cafe75
convert: add support for specifying multiple revs
Previously convert could only take one '--rev'. This change allows the user to
specify multiple --rev entries. For instance, this could allow converting
multiple branches (but not all branches) at once from git.
In this first patch, we disable support for this for all sources. Future
patches will enable it for select sources (like git).
author | Durham Goode <durham@fb.com> |
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date | Wed, 08 Jul 2015 10:27:43 -0700 |
parents | 5c97a4ecbdd4 |
children | f2748cc43b2a |
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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, error |
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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, revs=None): |
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90 super(convert_git, self).__init__(ui, path, revs=revs) |
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91 |
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92 if revs and len(revs) > 1: |
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93 raise util.Abort(_("git source does not support specifying " |
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94 "multiple revs")) |
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95 |
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96 if os.path.isdir(path + "/.git"): |
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97 path += "/.git" |
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98 if not os.path.exists(path + "/objects"): |
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99 raise NoRepo(_("%s does not look like a Git repository") % path) |
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100 |
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101 # The default value (50) is based on the default for 'git diff'. |
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102 similarity = ui.configint('convert', 'git.similarity', default=50) |
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103 if similarity < 0 or similarity > 100: |
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104 raise util.Abort(_('similarity must be between 0 and 100')) |
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105 if similarity > 0: |
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106 self.simopt = '-C%d%%' % similarity |
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107 findcopiesharder = ui.configbool('convert', 'git.findcopiesharder', |
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108 False) |
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109 if findcopiesharder: |
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110 self.simopt += ' --find-copies-harder' |
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111 else: |
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112 self.simopt = '' |
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113 |
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114 checktool('git', 'git') |
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115 |
316 | 116 self.path = path |
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117 self.submodules = [] |
316 | 118 |
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119 self.catfilepipe = self.gitpipe('git cat-file --batch') |
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120 |
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121 def after(self): |
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122 for f in self.catfilepipe: |
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123 f.close() |
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124 |
316 | 125 def getheads(self): |
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126 if not self.revs: |
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127 heads, ret = self.gitread('git rev-parse --branches --remotes') |
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128 heads = heads.splitlines() |
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129 else: |
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130 heads, ret = self.gitread("git rev-parse --verify %s" % |
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131 self.revs[0]) |
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132 heads = [heads[:-1]] |
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133 if ret: |
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134 raise util.Abort(_('cannot retrieve git heads')) |
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135 return heads |
316 | 136 |
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137 def catfile(self, rev, type): |
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138 if rev == hex(nullid): |
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139 raise IOError |
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140 self.catfilepipe[0].write(rev+'\n') |
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141 self.catfilepipe[0].flush() |
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142 info = self.catfilepipe[1].readline().split() |
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143 if info[1] != type: |
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144 raise util.Abort(_('cannot read %r object at %s') % (type, rev)) |
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145 size = int(info[2]) |
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146 data = self.catfilepipe[1].read(size) |
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147 if len(data) < size: |
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148 raise util.Abort(_('cannot read %r object at %s: unexpected size') |
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149 % (type, rev)) |
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150 # read the trailing newline |
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151 self.catfilepipe[1].read(1) |
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152 return data |
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153 |
316 | 154 def getfile(self, name, rev): |
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155 if rev == hex(nullid): |
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156 return None, None |
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157 if name == '.hgsub': |
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158 data = '\n'.join([m.hgsub() for m in self.submoditer()]) |
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159 mode = '' |
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160 elif name == '.hgsubstate': |
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161 data = '\n'.join([m.hgsubstate() for m in self.submoditer()]) |
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162 mode = '' |
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163 else: |
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164 data = self.catfile(rev, "blob") |
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165 mode = self.modecache[(name, rev)] |
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166 return data, mode |
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167 |
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168 def submoditer(self): |
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169 null = hex(nullid) |
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170 for m in sorted(self.submodules, key=lambda p: p.path): |
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171 if m.node != null: |
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172 yield m |
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173 |
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174 def parsegitmodules(self, content): |
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175 """Parse the formatted .gitmodules file, example file format: |
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176 [submodule "sub"]\n |
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177 \tpath = sub\n |
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178 \turl = git://giturl\n |
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179 """ |
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180 self.submodules = [] |
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181 c = config.config() |
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182 # Each item in .gitmodules starts with whitespace that cant be parsed |
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183 c.parse('.gitmodules', '\n'.join(line.strip() for line in |
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184 content.split('\n'))) |
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185 for sec in c.sections(): |
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186 s = c[sec] |
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187 if 'url' in s and 'path' in s: |
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188 self.submodules.append(submodule(s['path'], '', s['url'])) |
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189 |
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190 def retrievegitmodules(self, version): |
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191 modules, ret = self.gitread("git show %s:%s" % (version, '.gitmodules')) |
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192 if ret: |
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193 # This can happen if a file is in the repo that has permissions |
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194 # 160000, but there is no .gitmodules file. |
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195 self.ui.warn(_("warning: cannot read submodules config file in " |
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196 "%s\n") % version) |
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197 return |
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198 |
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199 try: |
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200 self.parsegitmodules(modules) |
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201 except error.ParseError: |
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202 self.ui.warn(_("warning: unable to parse .gitmodules in %s\n") |
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203 % version) |
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204 return |
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205 |
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206 for m in self.submodules: |
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207 node, ret = self.gitread("git rev-parse %s:%s" % (version, m.path)) |
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208 if ret: |
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209 continue |
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210 m.node = node.strip() |
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211 |
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212 def getchanges(self, version, full): |
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213 if full: |
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214 raise util.Abort(_("convert from git do not support --full")) |
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215 self.modecache = {} |
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216 fh = self.gitopen("git diff-tree -z --root -m -r %s %s" % ( |
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217 self.simopt, version)) |
316 | 218 changes = [] |
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219 copies = {} |
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220 seen = set() |
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221 entry = None |
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222 subexists = [False] |
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223 subdeleted = [False] |
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224 difftree = fh.read().split('\x00') |
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225 lcount = len(difftree) |
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226 i = 0 |
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227 |
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228 def add(entry, f, isdest): |
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229 seen.add(f) |
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230 h = entry[3] |
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231 p = (entry[1] == "100755") |
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232 s = (entry[1] == "120000") |
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233 renamesource = (not isdest and entry[4][0] == 'R') |
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234 |
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235 if f == '.gitmodules': |
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236 subexists[0] = True |
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237 if entry[4] == 'D' or renamesource: |
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238 subdeleted[0] = True |
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239 changes.append(('.hgsub', hex(nullid))) |
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240 else: |
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241 changes.append(('.hgsub', '')) |
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242 elif entry[1] == '160000' or entry[0] == ':160000': |
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243 subexists[0] = True |
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244 else: |
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245 if renamesource: |
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246 h = hex(nullid) |
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247 self.modecache[(f, h)] = (p and "x") or (s and "l") or "" |
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248 changes.append((f, h)) |
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249 |
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250 while i < lcount: |
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251 l = difftree[i] |
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252 i += 1 |
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253 if not entry: |
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254 if not l.startswith(':'): |
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255 continue |
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256 entry = l.split() |
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257 continue |
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258 f = l |
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259 if f not in seen: |
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260 add(entry, f, False) |
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261 # A file can be copied multiple times, or modified and copied |
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262 # simultaneously. So f can be repeated even if fdest isn't. |
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263 if entry[4][0] in 'RC': |
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264 # rename or copy: next line is the destination |
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265 fdest = difftree[i] |
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266 i += 1 |
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267 if fdest not in seen: |
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268 add(entry, fdest, True) |
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269 # .gitmodules isn't imported at all, so it being copied to |
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270 # and fro doesn't really make sense |
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271 if f != '.gitmodules' and fdest != '.gitmodules': |
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272 copies[fdest] = f |
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273 entry = None |
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274 if fh.close(): |
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275 raise util.Abort(_('cannot read changes in %s') % version) |
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276 |
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277 if subexists[0]: |
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278 if subdeleted[0]: |
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279 changes.append(('.hgsubstate', hex(nullid))) |
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280 else: |
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281 self.retrievegitmodules(version) |
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282 changes.append(('.hgsubstate', '')) |
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283 return (changes, copies, set()) |
316 | 284 |
285 def getcommit(self, version): | |
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286 c = self.catfile(version, "commit") # read the commit hash |
316 | 287 end = c.find("\n\n") |
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288 message = c[end + 2:] |
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289 message = self.recode(message) |
316 | 290 l = c[:end].splitlines() |
291 parents = [] | |
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292 author = committer = None |
316 | 293 for e in l[1:]: |
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294 n, v = e.split(" ", 1) |
316 | 295 if n == "author": |
296 p = v.split() | |
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297 tm, tz = p[-2:] |
316 | 298 author = " ".join(p[:-2]) |
299 if author[0] == "<": author = author[1:-1] | |
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300 author = self.recode(author) |
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301 if n == "committer": |
431 | 302 p = v.split() |
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303 tm, tz = p[-2:] |
431 | 304 committer = " ".join(p[:-2]) |
305 if committer[0] == "<": committer = committer[1:-1] | |
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306 committer = self.recode(committer) |
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307 if n == "parent": |
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308 parents.append(v) |
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309 |
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310 if committer and committer != author: |
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311 message += "\ncommitter: %s\n" % committer |
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312 tzs, tzh, tzm = tz[-5:-4] + "1", tz[-4:-2], tz[-2:] |
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313 tz = -int(tzs) * (int(tzh) * 3600 + int(tzm)) |
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314 date = tm + " " + str(tz) |
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315 |
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316 c = commit(parents=parents, date=date, author=author, desc=message, |
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317 rev=version) |
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318 return c |
316 | 319 |
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320 def numcommits(self): |
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321 return len([None for _ in self.gitopen('git rev-list --all')]) |
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322 |
694 | 323 def gettags(self): |
324 tags = {} | |
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325 alltags = {} |
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326 fh = self.gitopen('git ls-remote --tags "%s"' % self.path, |
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327 err=subprocess.STDOUT) |
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328 prefix = 'refs/tags/' |
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329 |
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330 # Build complete list of tags, both annotated and bare ones |
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331 for line in fh: |
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332 line = line.strip() |
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333 if line.startswith("error:") or line.startswith("fatal:"): |
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334 raise util.Abort(_('cannot read tags from %s') % self.path) |
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335 node, tag = line.split(None, 1) |
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336 if not tag.startswith(prefix): |
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337 continue |
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338 alltags[tag[len(prefix):]] = node |
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339 if fh.close(): |
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340 raise util.Abort(_('cannot read tags from %s') % self.path) |
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341 |
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342 # Filter out tag objects for annotated tag refs |
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343 for tag in alltags: |
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344 if tag.endswith('^{}'): |
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345 tags[tag[:-3]] = alltags[tag] |
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346 else: |
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347 if tag + '^{}' in alltags: |
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348 continue |
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349 else: |
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350 tags[tag] = alltags[tag] |
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351 |
694 | 352 return tags |
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353 |
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354 def getchangedfiles(self, version, i): |
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355 changes = [] |
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356 if i is None: |
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357 fh = self.gitopen("git diff-tree --root -m -r %s" % version) |
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358 for l in fh: |
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359 if "\t" not in l: |
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360 continue |
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361 m, f = l[:-1].split("\t") |
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362 changes.append(f) |
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363 else: |
16683 | 364 fh = self.gitopen('git diff-tree --name-only --root -r %s ' |
365 '"%s^%s" --' % (version, version, i + 1)) | |
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366 changes = [f.rstrip('\n') for f in fh] |
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367 if fh.close(): |
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368 raise util.Abort(_('cannot read changes in %s') % version) |
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369 |
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370 return changes |
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371 |
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372 def getbookmarks(self): |
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373 bookmarks = {} |
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374 |
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375 # Interesting references in git are prefixed |
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376 prefix = 'refs/heads/' |
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377 prefixlen = len(prefix) |
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378 |
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379 # factor two commands |
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380 gitcmd = { 'remote/': 'git ls-remote --heads origin', |
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381 '': 'git show-ref'} |
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382 |
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383 # Origin heads |
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384 for reftype in gitcmd: |
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385 try: |
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386 fh = self.gitopen(gitcmd[reftype], err=subprocess.PIPE) |
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387 for line in fh: |
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388 line = line.strip() |
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389 rev, name = line.split(None, 1) |
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390 if not name.startswith(prefix): |
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391 continue |
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392 name = '%s%s' % (reftype, name[prefixlen:]) |
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393 bookmarks[name] = rev |
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394 except Exception: |
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395 pass |
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396 |
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397 return bookmarks |
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398 |
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399 def checkrevformat(self, revstr, mapname='splicemap'): |
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400 """ git revision string is a 40 byte hex """ |
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401 self.checkhexformat(revstr, mapname) |