[PATCH 3 of 3 RESEND] revset: make keyword() function accept multiple arguments

[Alexander Plavin]

# HG changeset patch
# User Alexander Plavin <alexander at plav.in>
# Date 1377196207 -14400
#      Thu Aug 22 22:30:07 2013 +0400
# Node ID a213c1004a004877761ad6dd967722cfb1dac7d1
# Parent  52606445710a602c9ea290835f98eb436e78cccd
revset: make keyword() function accept multiple arguments

This provides a more convenient way to express a conjunction of
multiple keyword() calls with single argument.

diff -r 52606445710a -r a213c1004a00 mercurial/revset.py
--- a/mercurial/revset.py	Thu Aug 22 22:29:53 2013 +0400
+++ b/mercurial/revset.py	Thu Aug 22 22:30:07 2013 +0400
@@ -906,17 +906,22 @@
     return [r for r in subset if r in hiddenrevs]
 
 def keyword(repo, subset, x):
-    """``keyword(string)``
-    Search commit message, user name, and names of changed files for
-    string. The match is case-insensitive.
+    """``keyword(*string)``
+    Search commit message, user name, and names of changed files for one or multiple strings.
+    The match is case-insensitive.
     """
     # i18n: "keyword" is a keyword
-    kw = encoding.lower(getstring(x, _("keyword requires a string")))
+    kws = getargs(x, 1, -1, _("keyword requires at least one argument"))
+    # i18n: "keyword" is a keyword
+    kws = [encoding.lower(getstring(kw, _("keyword requires string arguments")))
+            for kw in kws]
     l = []
     for r in subset:
         c = repo[r]
-        if util.any(kw in encoding.lower(t)
-                    for t in c.files() + [c.user(), c.description()]):
+        if util.all(
+                (util.any(kw in encoding.lower(t)
+                          for t in c.files() + [c.user(), c.description()]))
+                for kw in kws):
             l.append(r)
     return l
 
diff -r 52606445710a -r a213c1004a00 tests/test-revset.t
--- a/tests/test-revset.t	Thu Aug 22 22:29:53 2013 +0400
+++ b/tests/test-revset.t	Thu Aug 22 22:30:07 2013 +0400
@@ -331,6 +331,10 @@
   $ log 'keyword("test a")'
   $ log 'desc(0, 1)'
   9
+  $ log 'keyword(test, a)'
+  0
+  6
+  9
   $ log 'limit(head(), 1)'
   0
   $ log 'matching(6)'