rebase: restore mq guards after rebasing (issue2107)

Guards on rebased mq patches were lost.
This patch restores them after the qimporting step.

hgext/rebase.py

@@ -354,6 +354,8 def updatemq(repo, state, skipped, **opt
     'Update rebased mq patches - finalize and then import them'
     mqrebase = {}
     mq = repo.mq
+    original_series = mq.full_series[:]
+
     for p in mq.applied:
         rev = repo[p.node].rev()
         if rev in state:
@@ -371,6 +373,15 def updatemq(repo, state, skipped, **opt
                 repo.ui.debug('import mq patch %d (%s)\n' % (state[rev], name))
                 mq.qimport(repo, (), patchname=name, git=isgit,
                                 rev=[str(state[rev])])
+
+        # Restore missing guards
+        for s in original_series:
+            pname = mq.guard_re.split(s, 1)[0]
+            if pname in mq.full_series:
+                repo.ui.debug('restoring guard for patch %s' % (pname))
+                mq.full_series.remove(pname)
+                mq.full_series.append(s)
+                mq.series_dirty = True
         mq.save_dirty()
 
 def storestatus(repo, originalwd, target, state, collapse, keep, keepbranches,

tests/test-rebase-mq.t

@@ -235,3 +235,73 Rebase the applied mq patches:
   -mq1
   +mq2
 
+
+Rebase with guards
+
+  $ hg init foo
+  $ cd foo
+  $ echo a > a
+  $ hg ci -Am a
+  adding a
+
+Create mq repo with guarded patches foo and bar:
+
+  $ hg qinit
+  $ hg qnew foo
+  $ hg qguard foo +baz
+  $ echo foo > foo
+  $ hg qref
+  $ hg qpop
+  popping foo
+  patch queue now empty
+
+  $ hg qnew bar
+  $ hg qguard bar +baz
+  $ echo bar > bar
+  $ hg qref
+
+  $ hg qguard -l
+  bar: +baz
+  foo: +baz
+
+  $ hg tglog
+  @  1:* '[mq]: bar' tags: bar qbase qtip tip (glob)
+  |
+  o  0:* 'a' tags: qparent (glob)
+  
+Create new head to rebase bar onto:
+
+  $ hg up -C 0
+  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ echo b > b
+  $ hg add b
+  $ hg ci -m b
+  created new head
+  $ hg up -C 1
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ echo a >> a
+  $ hg qref
+
+  $ hg tglog
+  @  2:* '[mq]: bar' tags: bar qbase qtip tip (glob)
+  |
+  | o  1:* 'b' tags: (glob)
+  |/
+  o  0:* 'a' tags: qparent (glob)
+  
+
+Rebase bar:
+
+  $ hg -q rebase -d 1
+
+  $ hg qguard -l
+  foo: +baz
+  bar: +baz
+
+  $ hg tglog
+  @  2:* '[mq]: bar' tags: bar qbase qtip tip (glob)
+  |
+  o  1:* 'b' tags: qparent (glob)
+  |
+  o  0:* 'a' tags: (glob)
+