1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
;;; semantic/symref/grep.el --- Symref implementation using find/grep
;; Copyright (C) 2008-2016 Free Software Foundation, Inc.
;; Author: Eric M. Ludlam <eric@siege-engine.com>
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;; Implement the symref tool API using the external tools find/grep.
;;
;; The symref GREP tool uses grep in a project to find symbol references.
;; This is a lowest-common-denominator tool with sucky performance that
;; can be used in small projects to find symbol references.
(require 'semantic/symref)
(require 'grep)
;;; Code:
;;; GREP
;;;###autoload
(defclass semantic-symref-tool-grep (semantic-symref-tool-baseclass)
(
)
"A symref tool implementation using grep.
This tool uses EDE to find he root of the project, then executes
find-grep in the project. The output is parsed for hits
and those hits returned.")
(defvar semantic-symref-filepattern-alist
'((c-mode "*.[ch]")
(c++-mode "*.[chCH]" "*.[ch]pp" "*.cc" "*.hh")
(html-mode "*.s?html" "*.php")
(ruby-mode "*.r[bu]" "*.rake" "*.gemspec" "*.erb" "*.haml"
"Rakefile" "Thorfile" "Capfile" "Guardfile" "Vagrantfile")
)
"List of major modes and file extension pattern.
See find -name man page for format.")
(defun semantic-symref-derive-find-filepatterns (&optional mode)
;; FIXME: This should be moved to grep.el, where it could be used
;; for "C-u M-x grep" as well.
"Derive a list of file patterns for the current buffer.
Looks first in `semantic-symref-filepattern-alist'. If it is not
there, it then looks in `auto-mode-alist', and attempts to derive something
from that.
Optional argument MODE specifies the `major-mode' to test."
;; First, try the filepattern alist.
(let* ((mode (or mode major-mode))
(pat (cdr (assoc mode semantic-symref-filepattern-alist))))
(when (not pat)
;; No hit, try auto-mode-alist.
(dolist (X auto-mode-alist)
(when (and (eq (cdr X) mode)
;; Only take in simple patterns, so try to convert this one.
(string-match "\\\\\\.\\([^\\'>]+\\)\\\\'" (car X)))
(push (concat "*." (match-string 1 (car X))) pat))))
;; Convert the list into some find-flags.
(if (null pat)
(error "Customize `semantic-symref-filepattern-alist' for %S"
major-mode)
(let ((args `("-name" ,(car pat))))
(if (null (cdr args))
args
`("(" ,@args
,@(apply #'nconc (mapcar (lambda (s) `("-o" "-name" ,s)) pat))
")"))))))
(defvar grepflags)
(defvar greppattern)
(defvar semantic-symref-grep-expand-keywords
(condition-case nil
(let* ((kw (copy-alist grep-expand-keywords))
(C (assoc "<C>" kw))
(R (assoc "<R>" kw)))
(setcdr C 'grepflags)
(setcdr R 'greppattern)
kw)
(error nil))
"Grep expand keywords used when expanding templates for symref.")
(defun semantic-symref-grep-use-template (rootdir filepattern flags pattern)
"Use the grep template expand feature to create a grep command.
ROOTDIR is the root location to run the `find' from.
FILEPATTERN is a string representing find flags for searching file patterns.
GREPFLAGS are flags passed to grep, such as -n or -l.
GREPPATTERN is the pattern used by grep."
;; We have grep-compute-defaults. Let's use it.
(grep-compute-defaults)
(let* ((grepflags flags)
(greppattern pattern)
(grep-expand-keywords semantic-symref-grep-expand-keywords)
(cmd (grep-expand-template
(if (memq system-type '(windows-nt ms-dos))
;; grep-find uses '--color=always' on MS-Windows
;; because it wants the colorized output, to show
;; it to the user. By contrast, here we don't show
;; the output, and the SGR escapes get in the way
;; of parsing the output.
(replace-regexp-in-string "--color=always" ""
grep-find-template t t)
grep-find-template)
greppattern
filepattern
rootdir)))
;; http://debbugs.gnu.org/20719
(when (string-match "find \\(\\.\\)" cmd)
(setq cmd (replace-match rootdir t t cmd 1)))
;;(message "New command: %s" cmd)
cmd))
(defcustom semantic-symref-grep-shell shell-file-name
"The shell command to use for executing find/grep.
This shell should support pipe redirect syntax."
:group 'semantic
:type 'string)
(cl-defmethod semantic-symref-perform-search ((tool semantic-symref-tool-grep))
"Perform a search with Grep."
;; Grep doesn't support some types of searches.
(let ((st (oref tool :searchtype)))
(when (not (memq st '(symbol regexp)))
(error "Symref impl GREP does not support searchtype of %s" st))
)
;; Find the root of the project, and do a find-grep...
(let* (;; Find the file patterns to use.
(rootdir (semantic-symref-calculate-rootdir))
(filepatterns (semantic-symref-derive-find-filepatterns))
(filepattern (mapconcat #'shell-quote-argument filepatterns " "))
;; Grep based flags.
(grepflags (cond ((eq (oref tool :resulttype) 'file)
"-l ")
((eq (oref tool :searchtype) 'regexp)
"-nE ")
(t "-n ")))
(greppat (shell-quote-argument
(cond ((eq (oref tool :searchtype) 'regexp)
(oref tool searchfor))
(t
;; Can't use the word boundaries: Grep
;; doesn't always agrees with the language
;; syntax on those.
(format "\\(^\\|\\W\\)%s\\(\\W\\|$\\)"
(oref tool searchfor))))))
;; Misc
(b (get-buffer-create "*Semantic SymRef*"))
(ans nil)
)
(with-current-buffer b
(erase-buffer)
(setq default-directory rootdir)
(if (not (fboundp 'grep-compute-defaults))
;; find . -type f -print0 | xargs -0 -e grep -nH -e
;; Note : I removed -e as it is not posix, nor necessary it seems.
(let ((cmd (concat "find " default-directory " -type f " filepattern " -print0 "
"| xargs -0 grep -H " grepflags "-e " greppat)))
;;(message "Old command: %s" cmd)
(call-process semantic-symref-grep-shell nil b nil
shell-command-switch cmd)
)
(let ((cmd (semantic-symref-grep-use-template rootdir filepattern grepflags greppat)))
(call-process semantic-symref-grep-shell nil b nil
shell-command-switch cmd))
))
(setq ans (semantic-symref-parse-tool-output tool b))
;; Return the answer
ans))
(cl-defmethod semantic-symref-parse-tool-output-one-line ((tool semantic-symref-tool-grep))
"Parse one line of grep output, and return it as a match list.
Moves cursor to end of the match."
(cond ((eq (oref tool :resulttype) 'file)
;; Search for files
(when (re-search-forward "^\\([^\n]+\\)$" nil t)
(match-string 1)))
(t
(when (re-search-forward "^\\(\\(?:[a-zA-Z]:\\)?[^:\n]+\\):\\([0-9]+\\):" nil t)
(cons (string-to-number (match-string 2))
(match-string 1))
))))
(provide 'semantic/symref/grep)
;; Local variables:
;; generated-autoload-file: "../loaddefs.el"
;; generated-autoload-load-name: "semantic/symref/grep"
;; End:
;;; semantic/symref/grep.el ends here
|
