# HG changeset patch
# User FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
# Date 1392461654 -32400
# Node ID fe849868fc5a6978fc69192f5e8c6fb35ff355eb
# Parent  191a0ae3776784473fba0a54070742eb8a5fdd9e
grep: exit loop immediately, if matching is found in the file for "hg grep -l"

Before this patch, internal function "display()" of "hg grep" is not
efficient for "-l"/"--files-with-matches", because loop is continued,
even after the first matching is found in the specified file.

This patch exits loop immediately, if matching is found for
"--files-with-matches".

In this case, "before is None" is equal to "opts.get('files_with_matches')".

diff -r 191a0ae37767 -r fe849868fc5a mercurial/commands.py
--- a/mercurial/commands.py	Sat Feb 15 19:54:05 2014 +0900
+++ b/mercurial/commands.py	Sat Feb 15 19:54:14 2014 +0900
@@ -3364,10 +3364,7 @@
                 cols.append((ui.shortuser(ctx.user()), 'grep.user'))
             if opts.get('date'):
                 cols.append((datefunc(ctx.date()), 'grep.date'))
-            if opts.get('files_with_matches'):
-                if found:
-                    continue
-            else:
+            if not opts.get('files_with_matches'):
                 before = l.line[:l.colstart]
                 match = l.line[l.colstart:l.colend]
                 after = l.line[l.colend:]
@@ -3385,6 +3382,8 @@
                     ui.write(after)
             ui.write(eol)
             found = True
+            if before is None:
+                break
         return found
 
     skip = {}