contrib: simple extension to practically convert a repo from tip delta to parentdelta

contrib: simple extension to practically convert a repo from tip delta to parentdelta

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/contrib/compress.py	Tue Aug 10 22:28:30 2010 +0530
@@ -0,0 +1,57 @@
+# Copyright 2010 Pradeepkumar Gayam <[e-mail]>
+#
+# Author(s):
+# Pradeepkumar Gayam <[e-mail]>
+#
+# This software may be used and distributed according to the terms of the
+# GNU General Public License version 2 or any later version.
+
+
+from mercurial import hg, ui, transaction, util, changegroup, localrepo, merge
+import sys, os
+
+def compress(ui, repo, dest, **opts):
+    dest = os.path.realpath(util.expandpath(dest))
+    target = localrepo.instance(ui, dest, create=1)
+    tr = transaction.transaction(sys.stderr.write,
+                                 util.opener('.', False), "compress")
+    src_cl = repo.changelog
+    tar_cl = target.changelog
+    changedfiles = set()
+    mmfs = {}
+    collect = changegroup.collector(src_cl, mmfs, changedfiles)
+    total = len(repo)
+    opener = target.sopener
+
+    for r in src_cl:
+        p = [src_cl.node(i) for i in src_cl.parentrevs(r)]
+        nd = tar_cl.addrevision(src_cl.revision(src_cl.node(r)), tr,
+                                 src_cl.linkrev(r), p[0], p[1])
+        collect(nd)
+        ui.progress(('adding changesets'), r, unit=('revisions'),
+                    total=total)
+
+    src_mnfst = repo.manifest
+    tar_mnfst = target.manifest
+    for r in src_mnfst:
+        p = [src_mnfst.node(i) for i in src_mnfst.parentrevs(r)]
+        tar_mnfst.addrevision(src_mnfst.revision(src_mnfst.node(r)), tr,
+                               src_mnfst.linkrev(r), p[0], p[1])
+        ui.progress(('adding manifest'), r, unit=('revisions'),
+                    total=total)
+
+    total = len(changedfiles)
+    for cnt, f in enumerate(changedfiles):
+        sf = repo.file(f)
+        tf = target.file(f)
+        for r in sf:
+            p = [sf.node(i) for i in sf.parentrevs(r)]
+            a = tf.addrevision(sf.revision(sf.node(r)), tr, sf.linkrev(r),
+                               p[0], p[1])
+        ui.progress(('adding files'), cnt, item=f, unit=('file'), total=total)
+
+    tr.close()
+
+cmdtable = {
+    "compress" : (compress, [], "DEST")
+    }