Mercurial > hg
annotate hgext/convert/git.py @ 25997:d4e1e947444b stable
convert: fix git copy file content conversions
There was a bug in the git convert code where if you copied a file and modified
the copy source in the same commit, and if the copy dest was alphabetically
earlier than the copy source, the converted version would use the copy dest
contents for both the source and the target.
The root of the bug is that the git diff-tree output is formatted like so:
:<mode> <mode> <oldhash> <newhash> <state> <src> <dest>
:100644 100644 c1ab79a15... 3dfc779ab... C069 oldname newname
:100644 100644 c1ab79a15... 03e2188a6... M oldname
The old code would always take the 'oldname' field as the name of the file being
processed, then it would try to do an extra convert for the newname. This works
for renames because it does a delete for the oldname and a create for the
newname.
For copies though, it ends up associating the copied content (3dfc779ab above)
with the oldname. It only happened when the dest was alphabetically before
because that meant the copy got processed before the modification.
The fix is the treat copy lines as affecting only the newname, and not marking
the oldname as processed.
author | Durham Goode <durham@fb.com> |
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date | Thu, 06 Aug 2015 17:21:46 -0700 |
parents | d9133e89d39d |
children | a7527c5769bb |
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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 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.revs: |
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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 if ret: |
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126 raise util.Abort(_('cannot retrieve git heads')) |
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127 else: |
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128 heads = [] |
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129 for rev in self.revs: |
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130 rawhead, ret = self.gitread("git rev-parse --verify %s" % rev) |
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131 heads.append(rawhead[:-1]) |
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132 if ret: |
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133 raise util.Abort(_('cannot retrieve git head "%s"') % rev) |
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134 return heads |
316 | 135 |
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136 def catfile(self, rev, type): |
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137 if rev == hex(nullid): |
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138 raise IOError |
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139 self.catfilepipe[0].write(rev+'\n') |
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140 self.catfilepipe[0].flush() |
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141 info = self.catfilepipe[1].readline().split() |
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142 if info[1] != type: |
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143 raise util.Abort(_('cannot read %r object at %s') % (type, rev)) |
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144 size = int(info[2]) |
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145 data = self.catfilepipe[1].read(size) |
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146 if len(data) < size: |
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147 raise util.Abort(_('cannot read %r object at %s: unexpected size') |
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148 % (type, rev)) |
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149 # read the trailing newline |
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150 self.catfilepipe[1].read(1) |
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151 return data |
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152 |
316 | 153 def getfile(self, name, rev): |
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154 if rev == hex(nullid): |
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155 return None, None |
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156 if name == '.hgsub': |
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157 data = '\n'.join([m.hgsub() for m in self.submoditer()]) |
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158 mode = '' |
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159 elif name == '.hgsubstate': |
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160 data = '\n'.join([m.hgsubstate() for m in self.submoditer()]) |
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161 mode = '' |
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162 else: |
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163 data = self.catfile(rev, "blob") |
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164 mode = self.modecache[(name, rev)] |
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165 return data, mode |
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166 |
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167 def submoditer(self): |
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168 null = hex(nullid) |
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169 for m in sorted(self.submodules, key=lambda p: p.path): |
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170 if m.node != null: |
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171 yield m |
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172 |
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173 def parsegitmodules(self, content): |
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174 """Parse the formatted .gitmodules file, example file format: |
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175 [submodule "sub"]\n |
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176 \tpath = sub\n |
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177 \turl = git://giturl\n |
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178 """ |
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179 self.submodules = [] |
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180 c = config.config() |
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181 # Each item in .gitmodules starts with whitespace that cant be parsed |
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182 c.parse('.gitmodules', '\n'.join(line.strip() for line in |
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183 content.split('\n'))) |
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184 for sec in c.sections(): |
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185 s = c[sec] |
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186 if 'url' in s and 'path' in s: |
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187 self.submodules.append(submodule(s['path'], '', s['url'])) |
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188 |
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189 def retrievegitmodules(self, version): |
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190 modules, ret = self.gitread("git show %s:%s" % (version, '.gitmodules')) |
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191 if ret: |
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192 # This can happen if a file is in the repo that has permissions |
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193 # 160000, but there is no .gitmodules file. |
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194 self.ui.warn(_("warning: cannot read submodules config file in " |
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195 "%s\n") % version) |
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196 return |
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197 |
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198 try: |
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199 self.parsegitmodules(modules) |
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200 except error.ParseError: |
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201 self.ui.warn(_("warning: unable to parse .gitmodules in %s\n") |
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202 % version) |
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203 return |
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204 |
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205 for m in self.submodules: |
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206 node, ret = self.gitread("git rev-parse %s:%s" % (version, m.path)) |
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207 if ret: |
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208 continue |
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209 m.node = node.strip() |
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210 |
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211 def getchanges(self, version, full): |
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212 if full: |
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213 raise util.Abort(_("convert from git do not support --full")) |
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214 self.modecache = {} |
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215 fh = self.gitopen("git diff-tree -z --root -m -r %s %s" % ( |
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216 self.simopt, version)) |
316 | 217 changes = [] |
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218 copies = {} |
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219 seen = set() |
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220 entry = None |
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221 subexists = [False] |
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222 subdeleted = [False] |
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223 difftree = fh.read().split('\x00') |
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224 lcount = len(difftree) |
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225 i = 0 |
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226 |
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227 def add(entry, f, isdest): |
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228 seen.add(f) |
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229 h = entry[3] |
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230 p = (entry[1] == "100755") |
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231 s = (entry[1] == "120000") |
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232 renamesource = (not isdest and entry[4][0] == 'R') |
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233 |
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234 if f == '.gitmodules': |
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235 subexists[0] = True |
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236 if entry[4] == 'D' or renamesource: |
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237 subdeleted[0] = True |
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238 changes.append(('.hgsub', hex(nullid))) |
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239 else: |
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240 changes.append(('.hgsub', '')) |
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241 elif entry[1] == '160000' or entry[0] == ':160000': |
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242 subexists[0] = True |
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243 else: |
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244 if renamesource: |
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245 h = hex(nullid) |
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246 self.modecache[(f, h)] = (p and "x") or (s and "l") or "" |
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247 changes.append((f, h)) |
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248 |
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249 while i < lcount: |
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250 l = difftree[i] |
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251 i += 1 |
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252 if not entry: |
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253 if not l.startswith(':'): |
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254 continue |
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255 entry = l.split() |
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256 continue |
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257 f = l |
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258 if entry[4][0] == 'C': |
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259 copysrc = f |
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260 copydest = difftree[i] |
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261 i += 1 |
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262 f = copydest |
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263 copies[copydest] = copysrc |
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264 if f not in seen: |
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265 add(entry, f, False) |
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266 # A file can be copied multiple times, or modified and copied |
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267 # simultaneously. So f can be repeated even if fdest isn't. |
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268 if entry[4][0] == 'R': |
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269 # rename: next line is the destination |
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270 fdest = difftree[i] |
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271 i += 1 |
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272 if fdest not in seen: |
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273 add(entry, fdest, True) |
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274 # .gitmodules isn't imported at all, so it being copied to |
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275 # and fro doesn't really make sense |
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276 if f != '.gitmodules' and fdest != '.gitmodules': |
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277 copies[fdest] = f |
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278 entry = None |
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279 if fh.close(): |
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280 raise util.Abort(_('cannot read changes in %s') % version) |
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281 |
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282 if subexists[0]: |
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283 if subdeleted[0]: |
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284 changes.append(('.hgsubstate', hex(nullid))) |
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285 else: |
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286 self.retrievegitmodules(version) |
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287 changes.append(('.hgsubstate', '')) |
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288 return (changes, copies, set()) |
316 | 289 |
290 def getcommit(self, version): | |
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291 c = self.catfile(version, "commit") # read the commit hash |
316 | 292 end = c.find("\n\n") |
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293 message = c[end + 2:] |
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294 message = self.recode(message) |
316 | 295 l = c[:end].splitlines() |
296 parents = [] | |
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297 author = committer = None |
316 | 298 for e in l[1:]: |
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299 n, v = e.split(" ", 1) |
316 | 300 if n == "author": |
301 p = v.split() | |
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302 tm, tz = p[-2:] |
316 | 303 author = " ".join(p[:-2]) |
304 if author[0] == "<": author = author[1:-1] | |
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305 author = self.recode(author) |
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306 if n == "committer": |
431 | 307 p = v.split() |
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308 tm, tz = p[-2:] |
431 | 309 committer = " ".join(p[:-2]) |
310 if committer[0] == "<": committer = committer[1:-1] | |
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311 committer = self.recode(committer) |
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312 if n == "parent": |
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313 parents.append(v) |
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314 |
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315 if committer and committer != author: |
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316 message += "\ncommitter: %s\n" % committer |
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317 tzs, tzh, tzm = tz[-5:-4] + "1", tz[-4:-2], tz[-2:] |
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318 tz = -int(tzs) * (int(tzh) * 3600 + int(tzm)) |
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319 date = tm + " " + str(tz) |
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320 |
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321 c = commit(parents=parents, date=date, author=author, desc=message, |
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322 rev=version) |
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323 return c |
316 | 324 |
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325 def numcommits(self): |
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326 return len([None for _ in self.gitopen('git rev-list --all')]) |
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327 |
694 | 328 def gettags(self): |
329 tags = {} | |
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330 alltags = {} |
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331 fh = self.gitopen('git ls-remote --tags "%s"' % self.path, |
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332 err=subprocess.STDOUT) |
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333 prefix = 'refs/tags/' |
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334 |
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335 # Build complete list of tags, both annotated and bare ones |
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336 for line in fh: |
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337 line = line.strip() |
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338 if line.startswith("error:") or line.startswith("fatal:"): |
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339 raise util.Abort(_('cannot read tags from %s') % self.path) |
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340 node, tag = line.split(None, 1) |
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341 if not tag.startswith(prefix): |
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342 continue |
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343 alltags[tag[len(prefix):]] = node |
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344 if fh.close(): |
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345 raise util.Abort(_('cannot read tags from %s') % self.path) |
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346 |
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347 # Filter out tag objects for annotated tag refs |
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348 for tag in alltags: |
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349 if tag.endswith('^{}'): |
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350 tags[tag[:-3]] = alltags[tag] |
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351 else: |
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352 if tag + '^{}' in alltags: |
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353 continue |
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354 else: |
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355 tags[tag] = alltags[tag] |
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356 |
694 | 357 return tags |
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358 |
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359 def getchangedfiles(self, version, i): |
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360 changes = [] |
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361 if i is None: |
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362 fh = self.gitopen("git diff-tree --root -m -r %s" % version) |
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363 for l in fh: |
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364 if "\t" not in l: |
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365 continue |
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366 m, f = l[:-1].split("\t") |
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367 changes.append(f) |
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368 else: |
16683 | 369 fh = self.gitopen('git diff-tree --name-only --root -r %s ' |
370 '"%s^%s" --' % (version, version, i + 1)) | |
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371 changes = [f.rstrip('\n') for f in fh] |
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372 if fh.close(): |
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373 raise util.Abort(_('cannot read changes in %s') % version) |
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374 |
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375 return changes |
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376 |
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377 def getbookmarks(self): |
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378 bookmarks = {} |
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379 |
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380 # Interesting references in git are prefixed |
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381 prefix = 'refs/heads/' |
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382 prefixlen = len(prefix) |
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383 |
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384 # factor two commands |
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385 remoteprefix = self.ui.config('convert', 'git.remoteprefix', 'remote') |
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386 gitcmd = { remoteprefix + '/': 'git ls-remote --heads origin', |
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387 '': 'git show-ref'} |
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388 |
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389 # Origin heads |
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390 for reftype in gitcmd: |
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391 try: |
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392 fh = self.gitopen(gitcmd[reftype], err=subprocess.PIPE) |
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393 for line in fh: |
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394 line = line.strip() |
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395 rev, name = line.split(None, 1) |
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396 if not name.startswith(prefix): |
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397 continue |
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398 name = '%s%s' % (reftype, name[prefixlen:]) |
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399 bookmarks[name] = rev |
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400 except Exception: |
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401 pass |
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402 |
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403 return bookmarks |
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404 |
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405 def checkrevformat(self, revstr, mapname='splicemap'): |
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406 """ git revision string is a 40 byte hex """ |
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407 self.checkhexformat(revstr, mapname) |