| 1 | #!/usr/bin/python |
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| 2 | |
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| 3 | import os |
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| 4 | import sys |
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| 5 | import subprocess |
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| 6 | import shutil |
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| 7 | |
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| 8 | def clonePackage(base, pkg): |
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| 9 | if not os.path.isdir('%s.git' % pkg): |
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| 10 | if os.path.isdir(pkg): |
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| 11 | shutil.rmtree(pkg) |
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| 12 | # Use --no-follow-parent because we're going to handle that with |
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| 13 | # grafts. |
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| 14 | subprocess.check_call(['git', 'svn', 'clone', |
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| 15 | '--no-follow-parent', |
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| 16 | '-Aauthors', |
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| 17 | '-q', |
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| 18 | '--no-metadata', |
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| 19 | '%s/packages/%s' % (base, pkg)], |
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| 20 | stdout=subprocess.PIPE) |
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| 21 | |
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| 22 | # Then make the repository bare, because git-svn can't do this |
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| 23 | shutil.move('%s/.git' % pkg, '%s.git' % pkg) |
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| 24 | shutil.rmtree(pkg) |
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| 25 | subprocess.check_call(['git', 'config', 'core.bare', 'true'], |
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| 26 | cwd='%s.git' % pkg) |
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| 27 | |
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| 28 | # Some of these repos have a rev where everything was deleted |
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| 29 | # as a result of the move. We don't want that rev to exist. |
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| 30 | p = subprocess.Popen(['git', 'ls-files'], |
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| 31 | cwd='%s.git' % pkg, |
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| 32 | stdout=subprocess.PIPE) |
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| 33 | p.wait() |
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| 34 | if len(p.stdout.read()) == 0: |
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| 35 | subprocess.check_call(['git', 'reset', '--soft', 'HEAD^'], |
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| 36 | cwd='%s.git' % pkg) |
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| 37 | |
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| 38 | def cloneAllPackages(base): |
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| 39 | for pkg in open('package-list'): |
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| 40 | clonePackage(base, pkg.strip()) |
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| 41 | |
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| 42 | def mergeHistory(old_pkg, new_pkg, n): |
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| 43 | cwd = os.getcwd() |
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| 44 | subprocess.check_call(['git', 'push', |
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| 45 | 'file:///%s/%s.git' % (cwd, new_pkg), |
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| 46 | 'master:refs/heads/%s' % old_pkg], |
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| 47 | cwd='%s.git' % new_pkg) |
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| 48 | |
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| 49 | graft = [] |
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| 50 | p = subprocess.Popen(['git', 'rev-list', |
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| 51 | '--reverse', |
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| 52 | '--skip=%s' % n, |
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| 53 | 'master'], |
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| 54 | cwd='%s.git' % new_pkg, |
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| 55 | stdout=subprocess.PIPE) |
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| 56 | p.wait() |
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| 57 | new_rev = p.stdout.read().split()[0] |
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| 58 | graft.append(new_rev) |
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| 59 | |
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| 60 | # If n isn't 0, then n has a parent commit already that we |
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| 61 | # shouldn't forget about. |
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| 62 | if n != 0: |
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| 63 | p = subprocess.Popen(['git', 'rev-parse', |
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| 64 | '%s^' % new_rev], |
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| 65 | cwd='%s.git' % new_pkg, |
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| 66 | stdout=subprocess.PIPE) |
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| 67 | p.wait() |
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| 68 | graft.append(p.stdout.read().strip()) |
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| 69 | |
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| 70 | # And regardless, the HEAD of old_pkg should be a parent of |
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| 71 | # new_pkg |
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| 72 | p = subprocess.Popen(['git', 'rev-parse', |
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| 73 | 'master'], |
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| 74 | cwd='%s.git' % old_pkg, |
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| 75 | stdout=subprocess.PIPE) |
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| 76 | p.wait() |
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| 77 | graft.append(p.stdout.read().strip()) |
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| 78 | |
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| 79 | f = open('%s.git/info/grafts' % new_pkg, 'a') |
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| 80 | |
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| 81 | print >>f, ' '.join(graft) |
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| 82 | |
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| 83 | def mergeHistories(): |
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| 84 | merges = [] |
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| 85 | for line in open('merges'): |
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| 86 | line = line.strip() |
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| 87 | if line == '' or line[0] == '#': |
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| 88 | continue |
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| 89 | |
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| 90 | merges.append(line.split()) |
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| 91 | |
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| 92 | for merge in merges: |
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| 93 | mergeHistory(*merge) |
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| 94 | |
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| 95 | for line in open('package-list'): |
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| 96 | line = line.strip() |
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| 97 | subprocess.check_call(['git', 'filter-branch', |
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| 98 | '--', |
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| 99 | '--all'], |
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| 100 | cwd='%s.git' % line) |
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| 101 | |
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| 102 | for merge in merges: |
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| 103 | shutil.rmtree('%s.git' % merge[0]) |
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| 104 | |
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| 105 | if __name__ == '__main__': |
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| 106 | try: |
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| 107 | base = sys.argv[1] |
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| 108 | except: |
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| 109 | base = 'svn://invirt.mit.edu/trunk' |
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| 110 | |
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| 111 | cloneAllPackages(base) |
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| 112 | mergeHistories() |
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