annotate contrib/convert-repo @ 1335:bea6356b8bca

git -> hg conversion script contrib/convert-repo changes: - do not print verbose output so that error messages are seen more easily - Output the date as integer and not as floating point number. - Do not require a ".git" subdirectory to work on, but use the GIT_DIR environment var to specify the git repository. Change is otherwise compatible to the current version and I have tested it by converting the kernel and several git respositories from kernel.org. (Btw, the udev test dir contains a /sys dir with entries which should not be normal dirs and not be normal files. ;-) Thanks again for mercurial, Florian La Roche --- a/contrib/convert-repo +++ b/contrib/convert-repo @@ -28,26 +28,18 @@ self.path = path def getheads(self): - h = file(self.path + "/.git/HEAD").read()[:-1] - return [h] + return [file(self.path + "/HEAD").read()[:-1]] def catfile(self, rev, type): if rev == "0" * 40: raise IOError() - path = os.getcwd() - os.chdir(self.path) - fh = os.popen("git-cat-file %s %s 2>/dev/null" % (type, rev)) - os.chdir(path) + fh = os.popen("GIT_DIR=%s git-cat-file %s %s 2>/dev/null" % (self.path, type, rev)) return fh.read() def getfile(self, name, rev): return self.catfile(rev, "blob") def getchanges(self, version): - path = os.getcwd() - os.chdir(self.path) - fh = os.popen("git-diff-tree --root -m -r %s" % (version)) - os.chdir(path) - + fh = os.popen("GIT_DIR=%s git-diff-tree --root -m -r %s" % (self.path, version)) changes = [] for l in fh: if "\t" not in l: continue @@ -83,9 +75,9 @@ def gettags(self): tags = {} - for f in os.listdir(self.path + "/.git/refs/tags"): + for f in os.listdir(self.path + "/refs/tags"): try: - h = file(self.path + "/.git/refs/tags/" + f).read().strip() + h = file(self.path + "/refs/tags/" + f).read().strip() tags[f] = h except: pass @@ -99,8 +91,7 @@ def getheads(self): h = self.repo.changelog.heads() - h = [ hg.hex(x) for x in h ] - return h + return [ hg.hex(x) for x in h ] def putfile(self, f, e, data): self.repo.wfile(f, "w").write(data) @@ -155,12 +146,12 @@ newlines.sort() if newlines != oldlines: - print "updating tags" + #print "updating tags" f = self.repo.wfile(".hgtags", "w") f.write("".join(newlines)) f.close() if not oldlines: self.repo.add([".hgtags"]) - date = "%s 0" % time.mktime(time.gmtime()) + date = "%s 0" % int(time.mktime(time.gmtime())) self.repo.rawcommit([".hgtags"], "update tags", "convert-repo", date, self.repo.changelog.tip(), hg.nullid) @@ -262,7 +253,7 @@ num -= 1 if c in self.map: continue desc = self.commitcache[c][3].splitlines()[0] - print num, desc + #print num, desc self.copy(c) tags = self.source.gettags() @@ -275,6 +266,8 @@ self.dest.puttags(ctags) gitpath, hgpath, mapfile = sys.argv[1:] +if os.path.isdir(gitpath + "/.git"): + gitpath += "/.git" c = convert(convert_git(gitpath), convert_mercurial(hgpath), mapfile) c.convert() _______________________________________________ Mercurial mailing list Mercurial@selenic.com http://selenic.com/mailman/listinfo/mercurial
author Florian La Roche <laroche@redhat.com>
date Fri, 23 Sep 2005 17:15:36 -0700
parents 227cfbe34109
children adb3de56635b
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1 #!/usr/bin/env python
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2 #
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3 # This is a generalized framework for converting between SCM
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4 # repository formats.
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5 #
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6 # In its current form, it's hardcoded to convert incrementally between
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7 # git and Mercurial.
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8 #
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9 # To use, you must first import the first git version into Mercurial,
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10 # and establish a mapping between the git commit hash and the hash in
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11 # Mercurial for that version. This mapping is kept in a simple text
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12 # file with lines like so:
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13 #
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14 # <git hash> <mercurial hash>
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15 #
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16 # To convert the rest of the repo, run:
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17 #
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18 # convert-repo <git-dir> <hg-dir> <mapfile>
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19 #
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20 # This updates the mapfile on each commit copied, so it can be
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21 # interrupted and can be run repeatedly to copy new commits.
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22
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23 import sys, os, zlib, sha, time
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24 from mercurial import hg, ui, util
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25
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26 class convert_git:
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27 def __init__(self, path):
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28 self.path = path
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29
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30 def getheads(self):
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31 return [file(self.path + "/HEAD").read()[:-1]]
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32
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33 def catfile(self, rev, type):
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34 if rev == "0" * 40: raise IOError()
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35 fh = os.popen("GIT_DIR=%s git-cat-file %s %s 2>/dev/null" % (self.path, type, rev))
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36 return fh.read()
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37
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38 def getfile(self, name, rev):
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39 return self.catfile(rev, "blob")
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40
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41 def getchanges(self, version):
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42 fh = os.popen("GIT_DIR=%s git-diff-tree --root -m -r %s" % (self.path, version))
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43 changes = []
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44 for l in fh:
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45 if "\t" not in l: continue
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46 m, f = l[:-1].split("\t")
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47 m = m.split()
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48 h = m[3]
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49 p = (m[1] == "100755")
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50 changes.append((f, h, p))
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51 return changes
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52
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53 def getcommit(self, version):
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54 c = self.catfile(version, "commit") # read the commit hash
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55 end = c.find("\n\n")
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56 message = c[end+2:]
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57 l = c[:end].splitlines()
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58 manifest = l[0].split()[1]
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59 parents = []
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60 for e in l[1:]:
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61 n,v = e.split(" ", 1)
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62 if n == "author":
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63 p = v.split()
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64 date = " ".join(p[-2:])
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65 author = " ".join(p[:-2])
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66 if author[0] == "<": author = author[1:-1]
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67 if n == "committer":
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68 p = v.split()
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69 date = " ".join(p[-2:])
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70 committer = " ".join(p[:-2])
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71 if committer[0] == "<": committer = committer[1:-1]
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72 message += "\ncommitter: %s %s\n" % (committer, date)
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73 if n == "parent": parents.append(v)
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74 return (parents, author, date, message)
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75
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76 def gettags(self):
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77 tags = {}
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78 for f in os.listdir(self.path + "/refs/tags"):
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79 try:
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80 h = file(self.path + "/refs/tags/" + f).read().strip()
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81 tags[f] = h
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82 except:
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83 pass
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84 return tags
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85
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86 class convert_mercurial:
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87 def __init__(self, path):
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88 self.path = path
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89 u = ui.ui()
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90 self.repo = hg.repository(u, path)
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91
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92 def getheads(self):
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93 h = self.repo.changelog.heads()
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94 return [ hg.hex(x) for x in h ]
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95
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96 def putfile(self, f, e, data):
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97 self.repo.wfile(f, "w").write(data)
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98 if self.repo.dirstate.state(f) == '?':
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99 self.repo.dirstate.update([f], "a")
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100
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101 util.set_exec(self.repo.wjoin(f), e)
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102
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103 def delfile(self, f):
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104 try:
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105 os.unlink(self.repo.wjoin(f))
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106 #self.repo.remove([f])
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107 except:
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108 pass
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109
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110 def putcommit(self, files, parents, author, dest, text):
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111 seen = {}
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112 pl = []
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113 for p in parents:
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114 if p not in seen:
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115 pl.append(p)
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116 seen[p] = 1
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117 parents = pl
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118
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119 if len(parents) < 2: parents.append("0" * 40)
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120 if len(parents) < 2: parents.append("0" * 40)
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121 p2 = parents.pop(0)
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122
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123 while parents:
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124 p1 = p2
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125 p2 = parents.pop(0)
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126 self.repo.rawcommit(files, text, author, dest,
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127 hg.bin(p1), hg.bin(p2))
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128 text = "(octopus merge fixup)\n"
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129
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130 return hg.hex(self.repo.changelog.tip())
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131
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132 def puttags(self, tags):
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133 try:
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134 old = self.repo.wfile(".hgtags").read()
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135 oldlines = old.splitlines(1)
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136 oldlines.sort()
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137 except:
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138 oldlines = []
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139
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140 k = tags.keys()
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141 k.sort()
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142 newlines = []
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143 for tag in k:
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144 newlines.append("%s %s\n" % (tags[tag], tag))
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145
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146 newlines.sort()
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147
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148 if newlines != oldlines:
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149 #print "updating tags"
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150 f = self.repo.wfile(".hgtags", "w")
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151 f.write("".join(newlines))
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152 f.close()
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153 if not oldlines: self.repo.add([".hgtags"])
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154 date = "%s 0" % int(time.mktime(time.gmtime()))
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155 self.repo.rawcommit([".hgtags"], "update tags", "convert-repo",
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156 date, self.repo.changelog.tip(), hg.nullid)
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157
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158 class convert:
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159 def __init__(self, source, dest, mapfile):
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160 self.source = source
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161 self.dest = dest
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162 self.mapfile = mapfile
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163 self.commitcache = {}
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164
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165 self.map = {}
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166 for l in file(self.mapfile):
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167 sv, dv = l[:-1].split()
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168 self.map[sv] = dv
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169
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170 def walktree(self, heads):
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171 visit = heads
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172 known = {}
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173 parents = {}
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174 while visit:
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175 n = visit.pop(0)
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176 if n in known or n in self.map: continue
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177 known[n] = 1
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178 self.commitcache[n] = self.source.getcommit(n)
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179 cp = self.commitcache[n][0]
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180 for p in cp:
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181 parents.setdefault(n, []).append(p)
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182 visit.append(p)
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183
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184 return parents
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185
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186 def toposort(self, parents):
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187 visit = parents.keys()
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188 seen = {}
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189 children = {}
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190
316
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191 while visit:
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192 n = visit.pop(0)
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193 if n in seen: continue
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194 seen[n] = 1
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195 pc = 0
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196 if n in parents:
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197 for p in parents[n]:
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198 if p not in self.map: pc += 1
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199 visit.append(p)
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200 children.setdefault(p, []).append(n)
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201 if not pc: root = n
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202
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203 s = []
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204 removed = {}
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205 visit = children.keys()
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206 while visit:
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207 n = visit.pop(0)
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208 if n in removed: continue
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209 dep = 0
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210 if n in parents:
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211 for p in parents[n]:
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212 if p in self.map: continue
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213 if p not in removed:
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214 # we're still dependent
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215 visit.append(n)
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216 dep = 1
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217 break
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218
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219 if not dep:
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220 # all n's parents are in the list
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221 removed[n] = 1
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222 s.append(n)
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223 if n in children:
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224 for c in children[n]:
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225 visit.insert(0, c)
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226
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227 return s
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228
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229 def copy(self, rev):
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230 p, a, d, t = self.commitcache[rev]
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231 files = self.source.getchanges(rev)
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232
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233 for f,v,e in files:
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234 try:
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235 data = self.source.getfile(f, v)
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236 except IOError, inst:
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237 self.dest.delfile(f)
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238 else:
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239 self.dest.putfile(f, e, data)
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240
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241 r = [self.map[v] for v in p]
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242 f = [f for f,v,e in files]
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243 self.map[rev] = self.dest.putcommit(f, r, a, d, t)
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244 file(self.mapfile, "a").write("%s %s\n" % (rev, self.map[rev]))
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245
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246 def convert(self):
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247 heads = self.source.getheads()
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248 parents = self.walktree(heads)
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249 t = self.toposort(parents)
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250 num = len(t)
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251
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252 for c in t:
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253 num -= 1
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254 if c in self.map: continue
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255 desc = self.commitcache[c][3].splitlines()[0]
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256 #print num, desc
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257 self.copy(c)
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258
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259 tags = self.source.gettags()
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260 ctags = {}
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261 for k in tags:
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262 v = tags[k]
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263 if v in self.map:
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264 ctags[k] = self.map[v]
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265
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266 self.dest.puttags(ctags)
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267
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268 gitpath, hgpath, mapfile = sys.argv[1:]
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269 if os.path.isdir(gitpath + "/.git"):
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270 gitpath += "/.git"
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271
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272 c = convert(convert_git(gitpath), convert_mercurial(hgpath), mapfile)
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273 c.convert()