issue 622: pull/unbundle -u updates to default branch if repo was empty

mercurial/commands.py

@@ -2025,11 +2025,13 b' def paths(ui, repo, search=None):'
         for name, path in ui.configitems("paths"):
             ui.write("%s = %s\n" % (name, path))
 
-def postincoming(ui, repo, modheads, optupdate):
+def postincoming(ui, repo, modheads, optupdate, wasempty):
     if modheads == 0:
         return
     if optupdate:
-        if modheads == 1:
+        if wasempty:
+            return hg.update(repo, repo.lookup('default'))
+        elif modheads == 1:
             return hg.update(repo, repo.changelog.tip()) # update
         else:
             ui.status(_("not updating, since new heads added\n"))
@@ -2091,8 +2093,9 b' def pull(ui, repo, source="default", **o'
             error = _("Other repository doesn't support revision lookup, so a rev cannot be specified.")
             raise util.Abort(error)
 
+    wasempty = repo.changelog.count() == 0
     modheads = repo.pull(other, heads=revs, force=opts['force'])
-    return postincoming(ui, repo, modheads, opts['update'])
+    return postincoming(ui, repo, modheads, opts['update'], wasempty)
 
 def push(ui, repo, dest=None, **opts):
     """push changes to the specified destination
@@ -2656,6 +2659,7 b' def unbundle(ui, repo, fname1, *fnames, '
     """
     fnames = (fname1,) + fnames
     result = None
+    wasempty = repo.changelog.count() == 0
     for fname in fnames:
         if os.path.exists(fname):
             f = open(fname, "rb")
@@ -2664,7 +2668,7 b' def unbundle(ui, repo, fname1, *fnames, '
         gen = changegroup.readbundle(f, fname)
         modheads = repo.addchangegroup(gen, 'unbundle', 'bundle:' + fname)
 
-    return postincoming(ui, repo, modheads, opts['update'])
+    return postincoming(ui, repo, modheads, opts['update'], wasempty)
 
 def update(ui, repo, node=None, rev=None, clean=False, date=None):
     """update working directory

tests/test-pull

@@ -18,3 +18,9 b' hg co'
 cat foo
 hg manifest --debug
 hg pull
+
+echo % issue 622
+cd ..
+hg init empty
+cd empty
+hg pull -u ../test

tests/test-pull.out

@@ -21,3 +21,11 b' 2ed2a3912a0b24502043eae84ee4b279c18b90dd'
 pulling from http://localhost:20059/
 searching for changes
 no changes found
+% issue 622
+pulling from ../test
+requesting all changes
+adding changesets
+adding manifests
+adding file changes
+added 1 changesets with 1 changes to 1 files
+1 files updated, 0 files merged, 0 files removed, 0 files unresolved