Prevent incorrect display when 'line-spacing' variable is set
[emacs.git] / lisp / find-cmd.el
blob7230761f6572a78b827865f43a337f942318434a
1 ;;; find-cmd.el --- Build a valid find(1) command with sexps
3 ;; Copyright (C) 2008-2015 Free Software Foundation, Inc.
5 ;; Author: Philip Jackson <phil@shellarchive.co.uk>
6 ;; Version: 0.6
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software: you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation, either version 3 of the License, or
13 ;; (at your option) any later version.
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
23 ;;; Commentary:
25 ;; With this module you can build up a (hopefully) valid find(1)
26 ;; string ready for the command line. For example:
28 ;; (find-cmd '(prune (name ".svn" ".git" ".CVS"))
29 ;; '(and (or (name "*.pl" "*.pm" "*.t")
30 ;; (mtime "+1"))
31 ;; (fstype "nfs" "ufs"))))
33 ;; will become (un-wrapped):
35 ;; "find '/home/phil/' \\( \\( -name '.svn' -or -name '.git' -or
36 ;; -name '.CVS' \\) -prune -or -true \\) \\( \\( \\( -name '*.pl'
37 ;; -or -name '*.pm' -or -name '*.t' \\) -or -mtime '+1' \\) -and \\(
38 ;; -fstype 'nfs' -or -fstype 'ufs' \\) \\)"
40 ;;; Code:
42 (require 'grep)
44 (defconst find-constituents
45 '((and . find-and)
46 (not . find-not)
47 (or . find-or)
49 (a . find-and)
50 (n . find-not)
51 (o . find-or)
53 (prune . find-prune)
55 ;; switches
56 (L . (0))
57 (P . (0))
58 (H . (0))
60 ;; generic tests
61 (amin . (1))
62 (anewer . (1))
63 (atime . (1))
64 (cmin . (1))
65 (cnewer . (1))
66 (ctime . (1))
67 (empty . (0))
68 (executable . (0))
69 (false . (0))
70 (fstype . (1))
71 (gid . (1))
72 (group . (1))
73 (ilname . (1))
74 (iname . (1))
75 (inum . (1))
76 (ipath . (1))
77 (iregex . (1))
78 (iwholename . (1))
79 (links . (1))
80 (lname . (1))
81 (mmin . (1))
82 (mtime . (1))
83 (name . (1))
84 (newer . (1))
85 (nogroup . (0))
86 (nouser . (0))
87 (path . (1))
88 (perm . (0))
89 (readable . (0))
90 (regex . (1))
91 (samefile . (1))
92 (size . (1))
93 (true . (0))
94 (type . (1))
95 (uid . (1))
96 (used . (1))
97 (user . (1))
98 (wholename . (1))
99 (writable . (0))
100 (xtype . (nil))
102 ;; normal options (always true)
103 (daystart . (0))
104 (depth . (0))
105 (maxdepth . (1))
106 (mindepth . (1))
107 (mount . (0))
108 (noleaf . (0))
109 (ignore_readdir_race . (0))
110 (noignore_readdir_race . (0))
111 (regextype . (1))
112 (xdev . (0))
114 ;; actions
115 (delete . (0))
116 (print0 . (0))
117 (printf . (1))
118 (fprintf . (2))
119 (print . (0))
120 (fprint0 . (1))
121 (fprint . (1))
122 (ls . (0))
123 (fls . (1))
124 (prune . (0))
125 (quit . (0))
127 ;; these need to be terminated with a ;
128 (exec . (1 find-command t))
129 (ok . (1 find-command t))
130 (execdir . (1 find-command t))
131 (okdir . (1 find-command t)))
132 "Holds details of each of the find options.
133 The car of each alist is the name. The cdr is minimum args, the
134 function used to join many occurrences of the argument together,
135 and whether or not to leave quotes off the string (non-nil means
136 the string will be quoted).")
138 ;;;###autoload
139 (defun find-cmd (&rest subfinds)
140 "Initiate the building of a find command.
141 For example:
143 \(find-cmd '\(prune \(name \".svn\" \".git\" \".CVS\"\)\)
144 '\(and \(or \(name \"*.pl\" \"*.pm\" \"*.t\"\)
145 \(mtime \"+1\"\)\)
146 \(fstype \"nfs\" \"ufs\"\)\)\)\)
148 `default-directory' is used as the initial search path. The
149 result is a string that should be ready for the command line."
150 ;; FIXME: Provide a version that returns a list of strings (ready to pass to
151 ;; call-process).
152 (concat find-program " "
153 (shell-quote-argument (expand-file-name default-directory)) " "
154 (cond
155 ((cdr subfinds)
156 (mapconcat #'find-to-string subfinds ""))
157 (t
158 (find-to-string (car subfinds))))))
160 (defun find-and (form)
161 "And FORMs together, so:
162 \(and \(mtime \"+1\"\) \(name \"something\"\)\)
163 will produce:
164 find . \\\( -mtime '+1' -and -name 'something' \\\)"
165 (if (< (length form) 2)
166 (find-to-string (car form))
167 (concat "\\( "
168 (mapconcat #'find-to-string form "-and ")
169 "\\) ")))
171 (defun find-or (form)
172 "Or FORMs together, so:
173 \(or \(mtime \"+1\"\) \(name \"something\"\)\)
174 will produce:
175 find . \\\( -mtime '+1' -or -name 'something' \\\)"
176 (if (< (length form) 2)
177 (find-to-string (car form))
178 (concat "\\( "
179 (mapconcat #'find-to-string form "-or ")
180 "\\) ")))
182 (defun find-not (form)
183 "Or FORMs together and prefix with a -not, so:
184 \(not \(mtime \"+1\"\) \(name \"something\"\)\)
185 will produce:
186 -not \\\( -mtime '+1' -or -name 'something' \\\)
187 If you wanted the FORMs -and(ed) together instead then this would
188 suffice:
189 \(not \(and \(mtime \"+1\"\) \(name \"something\"\)\)\)"
190 (concat "-not " (find-or (mapcar #'find-to-string form))))
192 (defun find-prune (form)
193 "-or together FORMs postfix '-prune' and then -or that with a
194 -true, so:
195 \(prune \(name \".svn\" \".git\"\)\) \(name \"*.pm\"\)
196 will produce (unwrapped):
197 \\\( \\\( \\\( -name '.svn' -or -name '.git' \\\) /
198 -prune -or -true \\\) -and -name '*.pm' \\\)"
199 (find-or
200 (list
201 (concat (find-or (mapcar #'find-to-string form)) (find-generic "prune"))
202 (find-generic "true"))))
204 (defun find-generic (option &optional oper argcount args dont-quote)
205 "Allow an arbitrary string to be used as a form.
206 OPTION is the name of the form, OPER is the function used to either
207 OR or AND multiple results together. ARGCOUNT is the minimum of
208 args that OPTION can receive and ARGS are the arguments for OPTION.
209 If DONT-QUOTE is non-nil, arguments are quoted for passing them to
210 the shell."
211 (when (and (numberp argcount) (< (length args) argcount))
212 (error "'%s' needs at least %d arguments" option argcount))
213 (let ((oper (or oper 'find-or)))
214 (if (and args (length args))
215 (funcall oper (mapcar (lambda (x)
216 (concat "-" option
217 (if dont-quote
218 (concat " " x " ")
219 (concat " "
220 (shell-quote-argument x)
221 " "))))
222 args))
223 (concat "-" option " "))))
225 (defun find-command (form)
226 "For each item in FORM add a terminating semi-colon and turn
227 them into valid switches. The result is -and(ed) together."
228 (find-and (mapcar (lambda (x)
229 (concat (find-to-string x) "\\; "))
230 form)))
232 (defun find-to-string (form)
233 "Parse FORM to produce a set of valid find arguments."
234 (cond
235 ((stringp form)
236 form)
237 ((consp form)
238 (let ((option (cdr (assoc (car form) find-constituents))))
239 (cond
240 ((and (symbolp option) (fboundp option))
241 (funcall option (cdr form)))
242 ((consp option)
243 (let ((option (symbol-name (car form)))
244 (argcnt (car option))
245 (oper (cadr option))
246 (dont-quote (car (cddr option))))
247 (find-to-string
248 (find-generic option oper argcnt (cdr form) dont-quote))))
249 (t
250 (error "Sorry I don't know how to handle '%s'" (car form))))))))
252 (provide 'find-cmd)
254 ;;; find-cmd.el ends here