# HG changeset patch
# User Pulkit Goyal <7895pulkit@gmail.com>
# Date 1495481899 -19800
# Node ID 018f638ad88ebe4b87733ebaff82489caa9bc951
# Parent  c8fb2a82b5f9841b16e065fa3a71f0654a791823
revset: add support for using ~ operator on wdir() predicate

We catch the WdirUnsupported exception and handles the wdir() case here.

diff -r c8fb2a82b5f9 -r 018f638ad88e mercurial/revset.py
--- a/mercurial/revset.py	Mon May 22 02:14:22 2017 +0530
+++ b/mercurial/revset.py	Tue May 23 01:08:19 2017 +0530
@@ -383,7 +383,10 @@
     cl = repo.changelog
     for r in getset(repo, fullreposet(repo), x):
         for i in range(n):
-            r = cl.parentrevs(r)[0]
+            try:
+                r = cl.parentrevs(r)[0]
+            except error.WdirUnsupported:
+                r = repo[r].parents()[0].rev()
         ps.add(r)
     return subset & ps
 
diff -r c8fb2a82b5f9 -r 018f638ad88e tests/test-revset.t
--- a/tests/test-revset.t	Mon May 22 02:14:22 2017 +0530
+++ b/tests/test-revset.t	Tue May 23 01:08:19 2017 +0530
@@ -1229,6 +1229,8 @@
   7
   $ hg debugrevspec 'wdir()^0'
   2147483647
+  $ hg debugrevspec 'wdir()~3'
+  5
   $ hg debugrevspec 'wdir()~0'
   2147483647
   $ hg debugrevspec 'p1(wdir())'