# HG changeset patch
# User Patrick Mezard <patrick@mezard.eu>
# Date 1345050124 -7200
# Node ID 5d9e2031c0b10863f999a902c81f28d2e7597fb6
# Parent  bd867a9ca51063654b6375b636d5a630b7e495a3
fileset: actually implement 'minusset'

  $ hg debugfileset 'a* - a1'

was tracing back because 'minus' symbol was not supported.

diff -r bd867a9ca510 -r 5d9e2031c0b1 mercurial/fileset.py
--- a/mercurial/fileset.py	Wed Aug 15 17:39:03 2012 +0200
+++ b/mercurial/fileset.py	Wed Aug 15 19:02:04 2012 +0200
@@ -107,6 +107,11 @@
     s = set(getset(mctx, x))
     return [r for r in mctx.subset if r not in s]
 
+def minusset(mctx, x, y):
+    xl = getset(mctx, x)
+    yl = set(getset(mctx, y))
+    return [f for f in xl if f not in yl]
+
 def listset(mctx, a, b):
     raise error.ParseError(_("can't use a list in this context"))
 
@@ -406,6 +411,7 @@
     'symbol': stringset,
     'and': andset,
     'or': orset,
+    'minus': minusset,
     'list': listset,
     'group': getset,
     'not': notset,
diff -r bd867a9ca510 -r 5d9e2031c0b1 tests/test-fileset.t
--- a/tests/test-fileset.t	Wed Aug 15 17:39:03 2012 +0200
+++ b/tests/test-fileset.t	Wed Aug 15 19:02:04 2012 +0200
@@ -36,4 +36,6 @@
   b1
   $ fileset '! ("a*")'
   b1
+  $ fileset 'a* - a1'
+  a2