-;;; grep.el --- run `grep' and display the results
+;;; grep.el --- run `grep' and display the results -*- lexical-binding:t -*-
-;; Copyright (C) 1985-1987, 1993-1999, 2001-2014 Free Software
+;; Copyright (C) 1985-1987, 1993-1999, 2001-2015 Free Software
;; Foundation, Inc.
;; Author: Roland McGrath <roland@gnu.org>
you will not get highlighting.
This option sets the environment variable GREP_COLORS to specify
-markers for highlighting and GREP_OPTIONS to add the --color
-option in front of any explicit grep options before starting
-the grep.
+markers for highlighting and adds the --color option in front of
+any explicit grep options before starting the grep.
-When this option is `auto', grep uses `--color=auto' to highlight
+When this option is `auto', grep uses `--color' to highlight
matches only when it outputs to a terminal (when `grep' is the last
command in the pipe), thus avoiding the use of any potentially-harmful
escape sequences when standard output goes to a file or pipe.
:type '(choice (const :tag "Do not highlight matches with grep markers" nil)
(const :tag "Highlight matches with grep markers" t)
(const :tag "Use --color=always" always)
- (const :tag "Use --color=auto" auto)
+ (const :tag "Use --color" auto)
(other :tag "Not Set" auto-detect))
:set 'grep-apply-setting
:version "22.1"
;;;###autoload
(defconst grep-regexp-alist
'(
- ;; Rule to match column numbers is commented out since no known grep
- ;; produces them
- ;; ("^\\(.+?\\)\\(:[ \t]*\\)\\([1-9][0-9]*\\)\\2\\(?:\\([1-9][0-9]*\\)\\(?:-\\([1-9][0-9]*\\)\\)?\\2\\)?"
- ;; 1 3 (4 . 5))
- ;; Note that we want to use as tight a regexp as we can to try and
- ;; handle weird file names (with colons in them) as well as possible.
- ;; E.g. we use [1-9][0-9]* rather than [0-9]+ so as to accept ":034:"
- ;; in file names.
- ("^\\(.+?\\)\\(:[ \t]*\\)\\([1-9][0-9]*\\)\\2"
- 1 3
+ ;; Use a tight regexp to handle weird file names (with colons
+ ;; in them) as well as possible. E.g., use [1-9][0-9]* rather
+ ;; than [0-9]+ so as to accept ":034:" in file names.
+ ("^\\(.*?[^/\n]\\):[ \t]*\\([1-9][0-9]*\\)[ \t]*:"
+ 1 2
;; Calculate column positions (col . end-col) of first grep match on a line
((lambda ()
(when grep-highlight-matches
;;;###autoload
(defvar find-program (purecopy "find")
- "The default find program for `grep-find-command'.
-This variable's value takes effect when `grep-compute-defaults' is called.")
+ "The default find program.
+This is used by commands like `grep-find-command', `find-dired'
+and others.")
;;;###autoload
(defvar xargs-program (purecopy "xargs")
;; `setenv' modifies `process-environment' let-bound in `compilation-start'
;; Any TERM except "dumb" allows GNU grep to use `--color=auto'
(setenv "TERM" "emacs-grep")
- (setenv "GREP_OPTIONS"
- (concat (getenv "GREP_OPTIONS")
- " --color=" (if (eq grep-highlight-matches 'always)
- "always" "auto")))
;; 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
(looking-at
(concat (regexp-quote hello-file)
":[0-9]+:English")))))))))
+
+ (when (eq grep-highlight-matches 'auto-detect)
+ (setq grep-highlight-matches
+ (with-temp-buffer
+ (and (grep-probe grep-program '(nil t nil "--help"))
+ (progn
+ (goto-char (point-min))
+ (search-forward "--color" nil t))
+ ;; Windows and DOS pipes fail `isatty' detection in Grep.
+ (if (memq system-type '(windows-nt ms-dos))
+ 'always 'auto)))))
+
(unless (and grep-command grep-find-command
grep-template grep-find-template)
(let ((grep-options
- (concat (if grep-use-null-device "-n" "-nH")
+ (concat (and grep-highlight-matches
+ (grep-probe grep-program
+ `(nil nil nil "--color" "x" ,null-device)
+ nil 1)
+ (if (eq grep-highlight-matches 'always)
+ "--color=always " "--color "))
+ (if grep-use-null-device "-n" "-nH")
(if (grep-probe grep-program
`(nil nil nil "-e" "foo" ,null-device)
nil 1)
(t
(format "%s . <X> -type f <F> -print | \"%s\" %s"
find-program xargs-program gcmd))))))))
- (when (eq grep-highlight-matches 'auto-detect)
- (setq grep-highlight-matches
- (with-temp-buffer
- (and (grep-probe grep-program '(nil t nil "--help"))
- (progn
- (goto-char (point-min))
- (search-forward "--color" nil t))
- ;; Windows and DOS pipes fail `isatty' detection in Grep.
- (if (memq system-type '(windows-nt ms-dos))
- 'always 'auto)))))
;; Save defaults for this host.
(setq grep-host-defaults-alist
(defun grep-expand-template (template &optional regexp files dir excl)
"Patch grep COMMAND string replacing <C>, <D>, <F>, <R>, and <X>."
- (let ((command template)
- (cf case-fold-search)
- (case-fold-search nil))
+ (let* ((command template)
+ (env `((cf . ,case-fold-search)
+ (excl . ,excl)
+ (dir . ,dir)
+ (files . ,files)
+ (regexp . ,regexp)))
+ (case-fold-search nil))
(dolist (kw grep-expand-keywords command)
(if (string-match (car kw) command)
(setq command
(replace-match
(or (if (symbolp (cdr kw))
- (symbol-value (cdr kw))
- (save-match-data (eval (cdr kw))))
+ (eval (cdr kw) env)
+ (save-match-data (eval (cdr kw) env)))
"")
t t command))))))
(defun grep-read-regexp ()
- "Read regexp arg for interactive grep."
+ "Read regexp arg for interactive grep using `read-regexp'."
(read-regexp "Search for" 'grep-tag-default 'grep-regexp-history))
(defun grep-read-files (regexp)
(confirm (equal current-prefix-arg '(4))))
(list regexp files dir confirm))))))
(when (and (stringp regexp) (> (length regexp) 0))
- (unless (and dir (file-directory-p dir) (file-readable-p dir))
+ (unless (and dir (file-accessible-directory-p dir))
(setq dir default-directory))
(let ((command regexp))
(if (null files)
(confirm (equal current-prefix-arg '(4))))
(list regexp files dir confirm))))))
(when (and (stringp regexp) (> (length regexp) 0))
- (unless (and dir (file-directory-p dir) (file-readable-p dir))
+ (unless (and dir (file-accessible-directory-p dir))
(setq dir default-directory))
(if (null files)
(if (not (string= regexp (if (consp grep-find-command)
(setq default-directory dir)))))))
;;;###autoload
-(defun zrgrep (regexp &optional files dir confirm grep-find-template)
+(defun zrgrep (regexp &optional files dir confirm template)
"Recursively grep for REGEXP in gzipped FILES in tree rooted at DIR.
Like `rgrep' but uses `zgrep' for `grep-program', sets the default
file name to `*.gz', and sets `grep-highlight-matches' to `always'."
(list regexp files dir confirm grep-find-template)))))))
;; Set `grep-highlight-matches' to `always'
;; since `zgrep' puts filters in the grep output.
- (let ((grep-highlight-matches 'always))
- ;; `rgrep' uses the dynamically bound value `grep-find-template'
- ;; from the argument `grep-find-template' whose value is computed
- ;; in the `interactive' spec.
+ (let ((grep-find-template template)
+ (grep-highlight-matches 'always))
(rgrep regexp files dir confirm)))
;;;###autoload