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bundle2: fix bundle2 pulling all revs on empty pulls stable
authorDurham Goode <durham@fb.com>
Wed, 07 May 2014 17:24:19 -0700
branchstable
changeset 21584 4dca1a06e7ee
parent 21583 dc141bdb5cb0
child 21585 652e07debf10
child 21615 3cb2da25b171
bundle2: fix bundle2 pulling all revs on empty pulls When bundle2 was enabled, if hg pull had no commits to pull, it would print 'no changes found' and then download the entire repository from the server. This was caused by heads and common being set to None, which gets treated as heads=cl.heads() and common=[nullid], which means download the entire repo. Pulling bundles without a changegroup is a valid use case (like if we're just updating bookmarks), so this modifes the bundle code to allow not adding changegroups. This is backport of ab5040cd5749.
mercurial/exchange.py file | annotate | diff | comparison | revisions
tests/test-bundle2.t file | annotate | diff | comparison | revisions 
--- a/mercurial/exchange.py	Wed May 07 19:26:15 2014 -0700
+++ b/mercurial/exchange.py	Wed May 07 17:24:19 2014 -0700
@@ -573,12 +573,13 @@
     kwargs['bundlecaps'].add('bundle2=' + urllib.quote(capsblob))
     # pulling changegroup
     pullop.todosteps.remove('changegroup')
+
+    kwargs['common'] = pullop.common
+    kwargs['heads'] = pullop.heads or pullop.rheads
     if not pullop.fetch:
         pullop.repo.ui.status(_("no changes found\n"))
         pullop.cgresult = 0
     else:
-        kwargs['common'] = pullop.common
-        kwargs['heads'] = pullop.heads or pullop.rheads
         if pullop.heads is None and list(pullop.common) == [nullid]:
             pullop.repo.ui.status(_("requesting all changes\n"))
     _pullbundle2extraprepare(pullop, kwargs)
@@ -589,8 +590,10 @@
         op = bundle2.processbundle(pullop.repo, bundle, pullop.gettransaction)
     except bundle2.UnknownPartError, exc:
         raise util.Abort('missing support for %s' % exc)
-    assert len(op.records['changegroup']) == 1
-    pullop.cgresult = op.records['changegroup'][0]['return']
+
+    if pullop.fetch:
+        assert len(op.records['changegroup']) == 1
+        pullop.cgresult = op.records['changegroup'][0]['return']
 
 def _pullbundle2extraprepare(pullop, kwargs):
     """hook function so that extensions can extend the getbundle call"""
@@ -684,7 +687,7 @@
     The implementation is at a very early stage and will get massive rework
     when the API of bundle is refined.
     """
-    # build bundle here.
+    # build changegroup bundle here.
     cg = changegroup.getbundle(repo, source, heads=heads,
                                common=common, bundlecaps=bundlecaps)
     if bundlecaps is None or 'HG2X' not in bundlecaps:
@@ -697,8 +700,9 @@
             blob = urllib.unquote(bcaps[len('bundle2='):])
             b2caps.update(bundle2.decodecaps(blob))
     bundler = bundle2.bundle20(repo.ui, b2caps)
-    part = bundle2.bundlepart('b2x:changegroup', data=cg.getchunks())
-    bundler.addpart(part)
+    if cg:
+        part = bundle2.bundlepart('b2x:changegroup', data=cg.getchunks())
+        bundler.addpart(part)
     _getbundleextrapart(bundler, repo, source, heads=heads, common=common,
                         bundlecaps=bundlecaps, **kwargs)
     return util.chunkbuffer(bundler.getchunks())
--- a/tests/test-bundle2.t	Wed May 07 19:26:15 2014 -0700
+++ b/tests/test-bundle2.t	Wed May 07 17:24:19 2014 -0700
@@ -799,6 +799,12 @@
   added 1 changesets with 1 changes to 1 files (+1 heads)
   (run 'hg heads' to see heads, 'hg merge' to merge)
 
+pull empty
+
+  $ hg -R other pull -r 24b6387c8c8c
+  pulling from $TESTTMP/main (glob)
+  no changes found
+
 push
 
   $ hg -R main push other --rev eea13746799a
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