Simplify out the need to know the CWD.

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

diff --git a/git-migrate b/git-migrate
index f3ef98e..458d903 100755 (executable)
--- a/git-migrate
+++ b/git-migrate
@@ -24,11 +24,39 @@ def clonePackage(base, pkg):
         shutil.rmtree(pkg)
         subprocess.check_call(['git', 'config', 'core.bare', 'true'],
                               cwd='%s.git' % pkg)
+        
+    # Some of these repos have a rev where everything was deleted
+    # as a result of the move. We don't want that rev to exist.
+    p = subprocess.Popen(['git', 'ls-tree', 'HEAD'],
+                         cwd='%s.git' % pkg,
+                         stdout=subprocess.PIPE)
+    p.wait()
+    if len(p.stdout.read()) == 0:
+        subprocess.check_call(['git', 'reset', '--soft', 'HEAD^'],
+                              cwd='%s.git' % pkg)
 
 def cloneAllPackages(base):
     for pkg in open('package-list'):
         clonePackage(base, pkg.strip())
 
+def mergeHistory(old_pkg, new_pkg, n):
+    subprocess.check_call(['git', 'push',
+                           '../%s.git' % new_pkg,
+                           'master:refs/heads/%s' % old_pkg],
+                          cwd='%s.git' % old_pkg)
+
+def mergeHistories():
+    merges = []
+    for line in open('merges'):
+        line = line.strip()
+        if line == '' or line[0] == '#':
+            continue
+        
+        merges.append(line.split())
+    
+    for merge in merges:
+        mergeHistory(*merge)
+
 if __name__ == '__main__':
     try:
         base = sys.argv[1]
@@ -36,3 +64,4 @@ if __name__ == '__main__':
         base = 'svn://invirt.mit.edu/trunk'
     
     cloneAllPackages(base)
+    mergeHistories()