pull: prevent race condition in bookmark update when using -B (issue4689)

We are already fetching remote bookmarks to honor the -B option, we
now pass that data to the pull process so it can reuse it. This
prevents a race condition between the initial looking and the actual
pulling of changesets and bookmarks. Tests are updated to handle this
fact.

mercurial/commands.py

@@ -5129,6 +5129,7 b' def pull(ui, repo, source="default", **o'
             # not ending up with the name of the bookmark because of a race
             # condition on the server. (See issue 4689 for details)
             remotebookmarks = other.listkeys('bookmarks')
+            pullopargs['remotebookmarks'] = remotebookmarks
             for b in opts['bookmark']:
                 if b not in remotebookmarks:
                     raise util.Abort(_('remote bookmark %s not found!') % b)

mercurial/exchange.py

@@ -808,7 +808,8 b' class pulloperation(object):'
     afterward.
     """
 
-    def __init__(self, repo, remote, heads=None, force=False, bookmarks=()):
+    def __init__(self, repo, remote, heads=None, force=False, bookmarks=(),
+                 remotebookmarks=None):
         # repo we pull into
         self.repo = repo
         # repo we pull from
@@ -828,7 +829,7 b' class pulloperation(object):'
         # list of missing changeset to fetch remotely
         self.fetch = None
         # remote bookmarks data
-        self.remotebookmarks = None
+        self.remotebookmarks = remotebookmarks
         # result of changegroup pulling (used as return code by pull)
         self.cgresult = None
         # list of step already done

tests/test-bookmarks-pushpull.t

@@ -308,6 +308,43 b' race conditions'
      Y                         4:b0a5eff05604
      Z                         1:0d2164f0ce0d
 
+Update a bookmark right after the initial lookup -B (issue4689)
+
+  $ echo c6 > ../pull-race/f3 # to be committed during the race
+  $ cat <<EOF > ../pull-race/.hg/hgrc
+  > [hooks]
+  > # If anything to commit, commit it right after the first key listing used
+  > # during lookup. This makes the commit appear before the actual getbundle
+  > # call.
+  > listkeys.makecommit= ((hg st | grep -q M) && (hg commit -m race; echo commited in pull-race)) || exit 0
+  > EOF
+
+(new config need server restart)
+
+  $ "$TESTDIR/killdaemons.py" $DAEMON_PIDS
+  $ hg -R ../pull-race serve -p $HGPORT -d --pid-file=../pull-race.pid -E main-error.log
+  $ cat ../pull-race.pid >> $DAEMON_PIDS
+
+  $ hg -R $TESTTMP/pull-race book
+     @                         1:0d2164f0ce0d
+     X                         1:0d2164f0ce0d
+   * Y                         5:35d1ef0a8d1b
+     Z                         1:0d2164f0ce0d
+  $ hg pull -B Y
+  pulling from http://localhost:$HGPORT/
+  searching for changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 1 changes to 1 files
+  updating bookmark Y
+  (run 'hg update' to get a working copy)
+  $ hg book
+   * @                         1:0d2164f0ce0d
+     X                         1:0d2164f0ce0d
+     Y                         5:35d1ef0a8d1b
+     Z                         1:0d2164f0ce0d
+
 (done with this section of the test)
 
   $ "$TESTDIR/killdaemons.py" $DAEMON_PIDS

tests/test-hook.t

@@ -253,7 +253,6 b' listkeys hook'
   listkeys hook: HG_NAMESPACE=bookmarks HG_VALUES={'bar': '0000000000000000000000000000000000000000', 'foo': '0000000000000000000000000000000000000000'}
   no changes found
   listkeys hook: HG_NAMESPACE=phase HG_VALUES={}
-  listkeys hook: HG_NAMESPACE=bookmarks HG_VALUES={'bar': '0000000000000000000000000000000000000000', 'foo': '0000000000000000000000000000000000000000'}
   adding remote bookmark bar
   listkeys hook: HG_NAMESPACE=phases HG_VALUES={'cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b': '1', 'publishing': 'True'}
   $ cd ../a