Grep related fixes.

* etc/grep.txt: Add `eval' to the Local Variables section that
emulates `grep-filter'.

* lisp/progmodes/grep.el (grep-filter): Avoid incomplete processing by
keeping point where processing of grep matches begins, and
continue to delete remaining escape sequences from the same point.
(grep-filter): Make leading zero optional in "0?1;31m" because
git-grep emits "\033[1;31m" escape sequences unlike expected
"\033[01;31m" as GNU Grep does.
(grep-process-setup): Replace obsolete "ml=" with newer "sl=".

Fixes: debbugs:9408

4 files changed, 21 insertions, 4 deletions

diff --git a/etc/ChangeLog b/etc/ChangeLog
index 24c0fd54422..0749862f676 100644
--- a/etc/ChangeLog
+++ b/etc/ChangeLog
@@ -1,3 +1,8 @@
+2011-09-05  Juri Linkov  <juri@jurta.org>
+
+        * grep.txt: Add `eval' to the Local Variables section that
+        emulates `grep-filter'.
+
 2011-08-30  Paul Eggert  <eggert@cs.ucla.edu>
 
         * MACHINES: Remove obsolete info and update a bit (Bug#9404).
diff --git a/etc/grep.txt b/etc/grep.txt
index 9a3159f6b08..01ffa9f3ef8 100644
--- a/etc/grep.txt
+++ b/etc/grep.txt
@@ -103,5 +103,6 @@ COPYING PERMISSIONS:
 
 
 ;;; Local Variables:
+;;; eval: (let ((inhibit-read-only t) (compilation-filter-start (point-min))) (save-excursion (goto-char (point-max)) (grep-filter) (set-buffer-modified-p nil)))
 ;;; buffer-read-only: t
 ;;; End:
diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 59ecd1a3c12..d30010d6016 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,5 +1,15 @@
 2011-09-05  Juri Linkov  <juri@jurta.org>
 
+        * progmodes/grep.el (grep-filter): Avoid incomplete processing by
+        keeping point where processing of grep matches begins, and
+        continue to delete remaining escape sequences from the same point.
+        (grep-filter): Make leading zero optional in "0?1;31m" because
+        git-grep emits "\033[1;31m" escape sequences unlike expected
+        "\033[01;31m" as GNU Grep does (bug#9408).
+        (grep-process-setup): Replace obsolete "ml=" with newer "sl=".
+
+2011-09-05  Juri Linkov  <juri@jurta.org>
+
         * subr.el (y-or-n-p): Capitalize "yes".
 
 2011-09-04  Michael Albinus  <michael.albinus@gmx.de>
diff --git a/lisp/progmodes/grep.el b/lisp/progmodes/grep.el
index 709f01444bf..eeebcc6648f 100644
--- a/lisp/progmodes/grep.el
+++ b/lisp/progmodes/grep.el
@@ -459,7 +459,7 @@ Set up `compilation-exit-message-function' and run `grep-setup-hook'."
     ;; GREP_COLOR is used in GNU grep 2.5.1, but deprecated in later versions
     (setenv "GREP_COLOR" "01;31")
     ;; GREP_COLORS is used in GNU grep 2.5.2 and later versions
-    (setenv "GREP_COLORS" "mt=01;31:fn=:ln=:bn=:se=:ml=:cx=:ne"))
+    (setenv "GREP_COLORS" "mt=01;31:fn=:ln=:bn=:se=:sl=:cx=:ne"))
   (set (make-local-variable 'compilation-exit-message-function)
        (lambda (status code msg)
          (if (eq status 'exit)
@@ -480,20 +480,21 @@ Set up `compilation-exit-message-function' and run `grep-setup-hook'."
 This function is called from `compilation-filter-hook'."
   (save-excursion
     (forward-line 0)
-    (let ((end (point)))
+    (let ((end (point)) beg)
       (goto-char compilation-filter-start)
       (forward-line 0)
+      (setq beg (point))
       ;; Only operate on whole lines so we don't get caught with part of an
       ;; escape sequence in one chunk and the rest in another.
       (when (< (point) end)
         (setq end (copy-marker end))
         ;; Highlight grep matches and delete marking sequences.
-        (while (re-search-forward "\033\\[01;31m\\(.*?\\)\033\\[[0-9]*m" end 1)
+        (while (re-search-forward "\033\\[0?1;31m\\(.*?\\)\033\\[[0-9]*m" end 1)
           (replace-match (propertize (match-string 1)
                                      'face nil 'font-lock-face grep-match-face)
                          t t))
         ;; Delete all remaining escape sequences
-        (goto-char compilation-filter-start)
+        (goto-char beg)
         (while (re-search-forward "\033\\[[0-9;]*[mK]" end 1)
           (replace-match "" t t))))))