bookmarks: teach the -r option to use revsets

mercurial/commands.py

@@ -833,7 +833,7 b' def bookmark(ui, repo, mark=None, rev=No'
             raise util.Abort(
                 _("a bookmark cannot have the name of an existing branch"))
         if rev:
-            marks[mark] = repo.lookup(rev)
+            marks[mark] = scmutil.revsingle(repo, rev).node()
         else:
             marks[mark] = cur
         if not inactive and cur == marks[mark]:

tests/test-bookmarks.t

@@ -154,6 +154,19 b' list bookmarks'
    * Y                         2:db815d6d32e6
      Z                         0:f7b1eb17ad24
 
+bookmarks from a revset
+  $ hg bookmark -r '.^1' REVSET
+  $ hg bookmark -r ':tip' TIP
+  $ hg bookmarks
+     REVSET                    0:f7b1eb17ad24
+   * TIP                       2:db815d6d32e6
+     X2                        1:925d80f479bb
+     Y                         2:db815d6d32e6
+     Z                         0:f7b1eb17ad24
+
+  $ hg bookmark -d REVSET
+  $ hg bookmark -d TIP
+
 rename without new name
 
   $ hg bookmark -m Y