Mercurial > hg > config

annotate python/hg-merge.py @ 207:7bad4b7281f2

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add a file to merge hg repositories
author Jeff Hammel <jhammel@mozilla.com>
date Mon, 13 Feb 2012 16:22:59 -0800
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1 #!/usr/bin/env python
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2
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3 """
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4 merge mercurial repositories
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5
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6 Example:
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7 hg-merge.py --master http://hg.mozilla.org/build/talos http://hg.mozilla.org/build/pageloader#talos/pageloader
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8 """
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9
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10 import optparse
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11 import os
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12 import shutil
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13 import subprocess
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14 import sys
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15 import tempfile
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16 import urlparse
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17 try:
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18 from subprocess import check_call as call
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19 except:
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20 from subprocess import call
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21
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22 def url2filename(url):
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23 """gets a filename from a url"""
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24 scheme, netloc, path, query, fragment = urlparse.urlsplit(url)
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25 path = path.rstrip('/')
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26 assert path and '/' in path
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27 return path.split('/')[-1]
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28
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29 def manifest(hgrepo):
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30 """manifest of a local hg repository"""
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31 process = subprocess.Popen(['hg', 'manifest'], cwd=hgrepo, stdout=subprocess.PIPE)
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32 stdout, stderr = process.communicate()
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33 assert not process.returncode
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34 manifest = stdout.strip().splitlines()
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35 return set(manifest)
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36
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37 def merge(hgroot, repo, subpath=None):
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38 """merge repo to hgroot at subpath (None for repository root)"""
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39
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40 # get a manifest of the current repository
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41 root_manifest = manifest(hgroot)
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42 toplevel_contents = os.listdir(hgroot)
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43
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44 # staging area
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45 tempdir = tempfile.mkdtemp()
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46 fd, tmpfile = tempfile.mkstemp()
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47 os.close(fd)
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48
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49 exception = None
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50 try:
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51
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52 # clone the repository to be merged in
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53 call(['hg', 'clone', repo, tempdir])
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54
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55 # check manifest for conflicts
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56 repo_manifest = manifest(tempdir)
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57 assert repo_manifest, "Empty repository: %s" % repo
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58 intersection = root_manifest.intersection(repo_manifest)
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59 assert not intersection, "Overlap between %s and %s: %s" % (hgroot, repo, intersection)
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60
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61 # create a bundle
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62 call(['hg', 'bundle', tmpfile, '--all'], cwd=tempdir)
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63
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64 # apply the bundle
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65 call(['hg', 'unbundle', tmpfile], cwd=hgroot)
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66 call(['hg', 'merge'], cwd=hgroot)
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67
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68 if subpath:
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69 # move the new files to their new locations
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70 for item in repo_manifest:
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71 path = os.path.join(subpath, item)
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72 fullpath = os.path.join(hgroot, path)
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73 assert not os.path.exists(fullpath), "%s already exists" % fullpath
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74 subdirectory = os.path.dirname(fullpath)
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75 if not os.path.exists(subdirectory):
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76 os.makedirs(subdirectory)
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77 call(['hg', 'mv', item, path], cwd=hgroot)
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78 call(['hg', 'commit', '-m', 'merge %s to %s' % (repo, subpath)], cwd=hgroot)
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79 else:
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80 call(['hg', 'commit', '-m', 'merge in %s' % repo], cwd=hgroot)
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81
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82 except Exception, exception:
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83 pass # reraise on cleanup
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84
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85 # cleanup
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86 shutil.rmtree(tempdir)
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87 os.remove(tmpfile)
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88 if exception is not None:
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89 raise exception
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90
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91 def main(args=sys.argv[1:]):
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92
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93 # parse command line options
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94 usage = "%prog [options] http://hg.example.com/repository/path#destination/path [...]"
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95 parser = optparse.OptionParser(usage=usage, description=__doc__)
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96 parser.add_option('-m', '--master', dest='master',
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97 help="use this as the master repository (new clone, otherwise use CWD)")
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98 options, args = parser.parse_args(args)
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99 if not args:
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100 parser.print_help()
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101 parser.exit()
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102
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103 if options.master:
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104 # clone the new repository
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105 directory = url2filename(options.master)
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106 if os.path.exists(directory):
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107 shutil.rmtree(directory)
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108 call(['hg', 'clone', options.master])
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109 hgroot = os.path.join(os.getcwd(), directory)
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110 else:
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111 # get the root of the repository
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112 process = subprocess.Popen(['hg', 'root'], stdout=subprocess.PIPE)
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113 hgroot, stderr = process.communicate()
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114 hgroot = hgroot.strip()
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115 if process.returncode:
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116 sys.exit(1)
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117 assert os.path.exists(hgroot) and os.path.isdir(hgroot), "%s not found" % hgroot
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118
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119 # get the other repos to add
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120 for repo in args:
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121 subpath = None
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122 if '#' in repo:
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123 repo, subpath = repo.rsplit('#', 1)
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124 merge(hgroot, repo, subpath)
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125
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126 if __name__ == '__main__':
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127 main()