Mercurial > hg
annotate hgext/convert/git.py @ 21868:3420346174b1 stable
convert: detect removal of ".gitmodules" at git source revisions correctly
Before this patch, all operations applied on ".gitmodules" at git
source revisions are treated as modification, even if they are
actually removal of it.
If removal of ".gitmodules" is treated as modification unexpectedly,
"hg convert" is aborted by the exception raised in
"retrievegitmodules()" for ".gitmodules" at the git source revision
removing it, because that revision doesn't have any information of
".gitmodules".
This patch detects removal of ".gitmodules" at git source revisions
correctly.
If ".gitmodules" is removed at the git source revision, this patch
records "hex(nullid)" as the contents hash value for ".hgsub" and
".hgsubstate" at the destination revision.
This patch makes "getfile()" raise IOError also for ".hgstatus" and
".hgsubstate" if the contents hash value is "hex(nullid)", and this
tells removal of ".hgstatus" and ".hgsubstate" at the destination
revision to "localrepository.commitctx()" correctly.
For files other than ".hgstatus" and ".hgsubstate", checking the
contents hash value in "getfile()" may be redundant, because
"catfile()" for them also does so.
But this patch chooses writing it only once at the beginning of
"getfile()", to avoid writing same code twice both for ".hgsub" and
".hgsubstate" separately.
author | FUJIWARA Katsunori <foozy@lares.dti.ne.jp> |
---|---|
date | Mon, 14 Jul 2014 23:33:59 +0900 |
parents | e8203629371b |
children | cf599f8a2da8 |
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 else: |
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50 def gitopen(self, s, err=None): |
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51 if err == subprocess.PIPE: |
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52 (sin, so, se) = util.popen3('GIT_DIR=%s %s' % (self.path, s)) |
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53 return so |
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54 elif err == subprocess.STDOUT: |
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55 return self.popen_with_stderr(s) |
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56 else: |
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57 return util.popen('GIT_DIR=%s %s' % (self.path, s), 'rb') |
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58 |
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59 def popen_with_stderr(self, s): |
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60 p = subprocess.Popen(s, shell=True, bufsize=-1, |
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61 close_fds=util.closefds, |
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62 stdin=subprocess.PIPE, |
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63 stdout=subprocess.PIPE, |
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64 stderr=subprocess.STDOUT, |
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65 universal_newlines=False, |
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66 env=None) |
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67 return p.stdout |
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68 |
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69 def gitread(self, s): |
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70 fh = self.gitopen(s) |
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71 data = fh.read() |
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72 return data, fh.close() |
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73 |
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74 def __init__(self, ui, path, rev=None): |
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75 super(convert_git, self).__init__(ui, path, rev=rev) |
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76 |
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77 if os.path.isdir(path + "/.git"): |
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78 path += "/.git" |
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79 if not os.path.exists(path + "/objects"): |
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80 raise NoRepo(_("%s does not look like a Git repository") % path) |
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81 |
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82 checktool('git', 'git') |
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83 |
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85 self.submodules = [] |
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87 def getheads(self): | |
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88 if not self.rev: |
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89 heads, ret = self.gitread('git rev-parse --branches --remotes') |
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90 heads = heads.splitlines() |
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91 else: |
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92 heads, ret = self.gitread("git rev-parse --verify %s" % self.rev) |
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93 heads = [heads[:-1]] |
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94 if ret: |
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95 raise util.Abort(_('cannot retrieve git heads')) |
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96 return heads |
316 | 97 |
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98 def catfile(self, rev, type): |
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99 if rev == hex(nullid): |
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100 raise IOError |
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101 data, ret = self.gitread("git cat-file %s %s" % (type, rev)) |
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102 if ret: |
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103 raise util.Abort(_('cannot read %r object at %s') % (type, rev)) |
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104 return data |
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105 |
316 | 106 def getfile(self, name, rev): |
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107 if rev == hex(nullid): |
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108 raise IOError |
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109 if name == '.hgsub': |
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110 data = '\n'.join([m.hgsub() for m in self.submoditer()]) |
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111 mode = '' |
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112 elif name == '.hgsubstate': |
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113 data = '\n'.join([m.hgsubstate() for m in self.submoditer()]) |
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114 mode = '' |
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115 else: |
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116 data = self.catfile(rev, "blob") |
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117 mode = self.modecache[(name, rev)] |
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118 return data, mode |
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119 |
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120 def submoditer(self): |
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121 null = hex(nullid) |
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122 for m in sorted(self.submodules, key=lambda p: p.path): |
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123 if m.node != null: |
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124 yield m |
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125 |
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126 def parsegitmodules(self, content): |
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127 """Parse the formatted .gitmodules file, example file format: |
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128 [submodule "sub"]\n |
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129 \tpath = sub\n |
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130 \turl = git://giturl\n |
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131 """ |
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132 self.submodules = [] |
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133 c = config.config() |
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134 # Each item in .gitmodules starts with \t that cant be parsed |
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135 c.parse('.gitmodules', content.replace('\t','')) |
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136 for sec in c.sections(): |
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137 s = c[sec] |
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138 if 'url' in s and 'path' in s: |
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139 self.submodules.append(submodule(s['path'], '', s['url'])) |
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140 |
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141 def retrievegitmodules(self, version): |
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142 modules, ret = self.gitread("git show %s:%s" % (version, '.gitmodules')) |
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143 if ret: |
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144 raise util.Abort(_('cannot read submodules config file in %s') % |
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145 version) |
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146 self.parsegitmodules(modules) |
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147 for m in self.submodules: |
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148 node, ret = self.gitread("git rev-parse %s:%s" % (version, m.path)) |
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149 if ret: |
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150 continue |
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151 m.node = node.strip() |
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152 |
316 | 153 def getchanges(self, version): |
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154 self.modecache = {} |
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155 fh = self.gitopen("git diff-tree -z --root -m -r %s" % version) |
316 | 156 changes = [] |
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157 seen = set() |
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158 entry = None |
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159 subexists = False |
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160 subdeleted = False |
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161 for l in fh.read().split('\x00'): |
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162 if not entry: |
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163 if not l.startswith(':'): |
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164 continue |
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165 entry = l |
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166 continue |
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167 f = l |
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168 if f not in seen: |
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169 seen.add(f) |
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170 entry = entry.split() |
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171 h = entry[3] |
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172 p = (entry[1] == "100755") |
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173 s = (entry[1] == "120000") |
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174 |
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175 if f == '.gitmodules': |
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176 subexists = True |
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177 if entry[4] == 'D': |
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178 subdeleted = True |
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179 changes.append(('.hgsub', hex(nullid))) |
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180 else: |
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181 changes.append(('.hgsub', '')) |
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182 elif entry[1] == '160000' or entry[0] == ':160000': |
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183 subexists = True |
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184 else: |
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185 self.modecache[(f, h)] = (p and "x") or (s and "l") or "" |
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186 changes.append((f, h)) |
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187 entry = None |
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188 if fh.close(): |
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189 raise util.Abort(_('cannot read changes in %s') % version) |
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190 |
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191 if subexists: |
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192 if subdeleted: |
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193 changes.append(('.hgsubstate', hex(nullid))) |
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194 else: |
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195 self.retrievegitmodules(version) |
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196 changes.append(('.hgsubstate', '')) |
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197 return (changes, {}) |
316 | 198 |
199 def getcommit(self, version): | |
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200 c = self.catfile(version, "commit") # read the commit hash |
316 | 201 end = c.find("\n\n") |
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202 message = c[end + 2:] |
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203 message = self.recode(message) |
316 | 204 l = c[:end].splitlines() |
205 parents = [] | |
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206 author = committer = None |
316 | 207 for e in l[1:]: |
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208 n, v = e.split(" ", 1) |
316 | 209 if n == "author": |
210 p = v.split() | |
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211 tm, tz = p[-2:] |
316 | 212 author = " ".join(p[:-2]) |
213 if author[0] == "<": author = author[1:-1] | |
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214 author = self.recode(author) |
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215 if n == "committer": |
431 | 216 p = v.split() |
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217 tm, tz = p[-2:] |
431 | 218 committer = " ".join(p[:-2]) |
219 if committer[0] == "<": committer = committer[1:-1] | |
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220 committer = self.recode(committer) |
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221 if n == "parent": |
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222 parents.append(v) |
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223 |
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224 if committer and committer != author: |
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225 message += "\ncommitter: %s\n" % committer |
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226 tzs, tzh, tzm = tz[-5:-4] + "1", tz[-4:-2], tz[-2:] |
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227 tz = -int(tzs) * (int(tzh) * 3600 + int(tzm)) |
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228 date = tm + " " + str(tz) |
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229 |
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230 c = commit(parents=parents, date=date, author=author, desc=message, |
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231 rev=version) |
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232 return c |
316 | 233 |
694 | 234 def gettags(self): |
235 tags = {} | |
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236 alltags = {} |
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237 fh = self.gitopen('git ls-remote --tags "%s"' % self.path, |
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238 err=subprocess.STDOUT) |
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239 prefix = 'refs/tags/' |
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240 |
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241 # Build complete list of tags, both annotated and bare ones |
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242 for line in fh: |
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243 line = line.strip() |
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244 if line.startswith("error:") or line.startswith("fatal:"): |
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245 raise util.Abort(_('cannot read tags from %s') % self.path) |
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246 node, tag = line.split(None, 1) |
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247 if not tag.startswith(prefix): |
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248 continue |
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249 alltags[tag[len(prefix):]] = node |
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250 if fh.close(): |
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251 raise util.Abort(_('cannot read tags from %s') % self.path) |
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252 |
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253 # Filter out tag objects for annotated tag refs |
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254 for tag in alltags: |
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255 if tag.endswith('^{}'): |
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256 tags[tag[:-3]] = alltags[tag] |
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257 else: |
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258 if tag + '^{}' in alltags: |
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259 continue |
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260 else: |
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261 tags[tag] = alltags[tag] |
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262 |
694 | 263 return tags |
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264 |
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265 def getchangedfiles(self, version, i): |
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266 changes = [] |
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267 if i is None: |
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268 fh = self.gitopen("git diff-tree --root -m -r %s" % version) |
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269 for l in fh: |
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270 if "\t" not in l: |
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271 continue |
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272 m, f = l[:-1].split("\t") |
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273 changes.append(f) |
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274 else: |
16683 | 275 fh = self.gitopen('git diff-tree --name-only --root -r %s ' |
276 '"%s^%s" --' % (version, version, i + 1)) | |
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277 changes = [f.rstrip('\n') for f in fh] |
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278 if fh.close(): |
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279 raise util.Abort(_('cannot read changes in %s') % version) |
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280 |
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281 return changes |
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282 |
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283 def getbookmarks(self): |
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284 bookmarks = {} |
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285 |
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286 # Interesting references in git are prefixed |
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287 prefix = 'refs/heads/' |
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288 prefixlen = len(prefix) |
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289 |
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290 # factor two commands |
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291 gitcmd = { 'remote/': 'git ls-remote --heads origin', |
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292 '': 'git show-ref'} |
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293 |
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294 # Origin heads |
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295 for reftype in gitcmd: |
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296 try: |
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297 fh = self.gitopen(gitcmd[reftype], err=subprocess.PIPE) |
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298 for line in fh: |
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299 line = line.strip() |
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300 rev, name = line.split(None, 1) |
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301 if not name.startswith(prefix): |
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302 continue |
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303 name = '%s%s' % (reftype, name[prefixlen:]) |
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304 bookmarks[name] = rev |
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305 except Exception: |
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306 pass |
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307 |
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308 return bookmarks |
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309 |
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310 def checkrevformat(self, revstr, mapname='splicemap'): |
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311 """ git revision string is a 40 byte hex """ |
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312 self.checkhexformat(revstr, mapname) |
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313 |