Quash the rest of the empty revisions.

[invirt/scripts/git-migration.git] / git-migrate

diff --git a/git-migrate b/git-migrate
index f03884f..52204b2 100755 (executable)
--- a/git-migrate
+++ b/git-migrate
@@ -1,5 +1,6 @@
 #!/usr/bin/python
 
+import glob
 import os
 import sys
 import subprocess
@@ -28,18 +29,27 @@ def tagBase(pkg):
                            base],
                           cwd='%s.git' % pkg)
 
-def clonePackage(base, pkg):
+def clonePackage(base, repo_path):
+    pkg = os.path.basename(repo_path)
+    
     if not os.path.isdir('%s.git' % pkg):
         if os.path.isdir(pkg):
             shutil.rmtree(pkg)
+        
+        args = []
+        args.append('-Ttrunk/%s' % repo_path)
+        if repo_path.startswith('packages/'):
+            args.append('-tpackage_tags/%s' % pkg)
+        args.append(base)
+        args.append(pkg)
+        
         # Use --no-follow-parent because we're going to handle that with
         # grafts.
         subprocess.check_call(['git', 'svn', 'clone',
                                '--no-follow-parent',
                                '-Aauthors',
                                '-q',
-                               '--no-metadata',
-                               '%s/packages/%s' % (base, pkg)],
+                               '--no-metadata'] + args,
                               stdout=subprocess.PIPE)
         
         # Then make the repository bare, because git-svn can't do this
@@ -58,6 +68,20 @@ def clonePackage(base, pkg):
         subprocess.check_call(['git', 'reset', '--soft', 'HEAD^'],
                               cwd='%s.git' % pkg)
     
+    # Early in the project's history, there were a bunch of double
+    # directory trees - i.e. the source was actually in
+    # trunk/packages/$package/$package. Correct for that
+    cwd = os.getcwd()
+    os.environ['PACKAGE'] = pkg
+    p = subprocess.check_call(['git', 'filter-branch',
+                               '--commit-filter', '%s "$@"' % os.path.join(cwd, 'filter-subdirs'),
+                               '--tag-name-filter', 'cat',
+                               '--',
+                               '--all'],
+                              cwd='%s.git' % pkg)
+    
+    shutil.rmtree('%s.git/refs/original' % pkg, True)
+    
     tagBase(pkg)
 
 def cloneAllPackages(base):
@@ -118,6 +142,12 @@ def mergeHistory(old_pkg, new_pkg, n):
                      '--',
                      '--all'],
                     cwd='%s.git' % new_pkg)
+    
+    subprocess.call(['git', 'branch',
+                     '-D',
+                     old_pkg],
+                    cwd='%s.git' % new_pkg)
+    shutil.rmtree('%s.git/refs/original' % new_pkg, True)
 
 def mergeHistories():
     merges = []
@@ -130,12 +160,24 @@ def mergeHistories():
     
     for merge in merges:
         mergeHistory(*merge)
+    
+    for merge in merges:
+        shutil.rmtree('%s.git' % merge[0])
+
+def cleanupRepos():
+    for pkg in glob.glob('*.git'):
+        subprocess.check_call(['git', 'tag', '-d', 'base'],
+                              cwd='%s' % pkg)
+        
+        subprocess.check_call(['git', 'gc'],
+                              cwd='%s' % pkg)
 
 if __name__ == '__main__':
     try:
         base = sys.argv[1]
     except:
-        base = 'svn://invirt.mit.edu/trunk'
+        base = 'svn://invirt.mit.edu'
     
     cloneAllPackages(base)
     mergeHistories()
+    cleanupRepos()