Auto-commit of generated files.
[emacs.git] / lisp / find-cmd.el
bloba41a32762dcef61d58980e14913a1961e7712f66
1 ;;; find-cmd.el --- Build a valid find(1) command with sexps
3 ;; Copyright (C) 2008-2013 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 (defconst find-constituents
43 '((and . find-and)
44 (not . find-not)
45 (or . find-or)
47 (a . find-and)
48 (n . find-not)
49 (o . find-or)
51 (prune . find-prune)
53 ;; switches
54 (L . (0))
55 (P . (0))
56 (H . (0))
58 ;; generic tests
59 (amin . (1))
60 (anewer . (1))
61 (atime . (1))
62 (cmin . (1))
63 (cnewer . (1))
64 (ctime . (1))
65 (empty . (0))
66 (executable . (0))
67 (false . (0))
68 (fstype . (1))
69 (gid . (1))
70 (group . (1))
71 (ilname . (1))
72 (iname . (1))
73 (inum . (1))
74 (ipath . (1))
75 (iregex . (1))
76 (iwholename . (1))
77 (links . (1))
78 (lname . (1))
79 (mmin . (1))
80 (mtime . (1))
81 (name . (1))
82 (newer . (1))
83 (nogroup . (0))
84 (nouser . (0))
85 (path . (1))
86 (perm . (0))
87 (readable . (0))
88 (regex . (1))
89 (samefile . (1))
90 (size . (1))
91 (true . (0))
92 (type . (1))
93 (uid . (1))
94 (used . (1))
95 (user . (1))
96 (wholename . (1))
97 (writable . (0))
98 (xtype . (nil))
100 ;; normal options (always true)
101 (daystart . (0))
102 (depth . (0))
103 (maxdepth . (1))
104 (mindepth . (1))
105 (mount . (0))
106 (noleaf . (0))
107 (ignore_readdir_race . (0))
108 (noignore_readdir_race . (0))
109 (regextype . (1))
110 (xdev . (0))
112 ;; actions
113 (delete . (0))
114 (print0 . (0))
115 (printf . (1))
116 (fprintf . (2))
117 (print . (0))
118 (fprint0 . (1))
119 (fprint . (1))
120 (ls . (0))
121 (fls . (1))
122 (prune . (0))
123 (quit . (0))
125 ;; these need to be terminated with a ;
126 (exec . (1 find-command t))
127 (ok . (1 find-command t))
128 (execdir . (1 find-command t))
129 (okdir . (1 find-command t)))
130 "Holds details of each of the find options.
131 The car of each alist is the name. The cdr is minimum args, the
132 function used to join many occurrences of the argument together,
133 and whether or not to leave quotes off the string (non-nil means
134 the string will be quoted).")
136 ;;;###autoload
137 (defun find-cmd (&rest subfinds)
138 "Initiate the building of a find command.
139 For example:
141 \(find-cmd '\(prune \(name \".svn\" \".git\" \".CVS\"\)\)
142 '\(and \(or \(name \"*.pl\" \"*.pm\" \"*.t\"\)
143 \(mtime \"+1\"\)\)
144 \(fstype \"nfs\" \"ufs\"\)\)\)\)
146 `default-directory' is used as the initial search path. The
147 result is a string that should be ready for the command line."
148 (concat
149 "find " (shell-quote-argument (expand-file-name default-directory)) " "
150 (cond
151 ((cdr subfinds)
152 (mapconcat 'find-to-string subfinds ""))
154 (find-to-string (car subfinds))))))
156 (defun find-and (form)
157 "And FORMs together, so:
158 \(and \(mtime \"+1\"\) \(name \"something\"\)\)
159 will produce:
160 find . \\\( -mtime '+1' -and -name 'something' \\\)"
161 (if (< (length form) 2)
162 (find-to-string (car form))
163 (concat "\\( "
164 (mapconcat 'find-to-string form "-and ")
165 "\\) ")))
167 (defun find-or (form)
168 "Or FORMs together, so:
169 \(or \(mtime \"+1\"\) \(name \"something\"\)\)
170 will produce:
171 find . \\\( -mtime '+1' -or -name 'something' \\\)"
172 (if (< (length form) 2)
173 (find-to-string (car form))
174 (concat "\\( "
175 (mapconcat 'find-to-string form "-or ")
176 "\\) ")))
178 (defun find-not (form)
179 "Or FORMs together and prefix with a -not, so:
180 \(not \(mtime \"+1\"\) \(name \"something\"\)\)
181 will produce:
182 -not \\\( -mtime '+1' -or -name 'something' \\\)
183 If you wanted the FORMs -and(ed) together instead then this would
184 suffice:
185 \(not \(and \(mtime \"+1\"\) \(name \"something\"\)\)\)"
186 (concat "-not " (find-or (mapcar 'find-to-string form))))
188 (defun find-prune (form)
189 "-or together FORMs postfix '-prune' and then -or that with a
190 -true, so:
191 \(prune \(name \".svn\" \".git\"\)\) \(name \"*.pm\"\)
192 will produce (unwrapped):
193 \\\( \\\( \\\( -name '.svn' -or -name '.git' \\\) /
194 -prune -or -true \\\) -and -name '*.pm' \\\)"
195 (find-or
196 (list
197 (concat (find-or (mapcar 'find-to-string form)) (find-generic "prune"))
198 (find-generic "true"))))
200 (defun find-generic (option &optional oper argcount args dont-quote)
201 "Allow an arbitrary string to be used as a form.
202 OPTION is the name of the form, OPER is the function used to either
203 OR or AND multiple results together. ARGCOUNT is the minimum of
204 args that OPTION can receive and ARGS are the arguments for OPTION.
205 If DONT-QUOTE is non-nil, arguments are quoted for passing them to
206 the shell."
207 (when (and (numberp argcount) (< (length args) argcount))
208 (error "'%s' needs at least %d arguments" option argcount))
209 (let ((oper (or oper 'find-or)))
210 (if (and args (length args))
211 (funcall oper (mapcar (lambda (x)
212 (concat "-" option
213 (if dont-quote
214 (concat " " x " ")
215 (concat " "
216 (shell-quote-argument x)
217 " "))))
218 args))
219 (concat "-" option " "))))
221 (defun find-command (form)
222 "For each item in FORM add a terminating semi-colon and turn
223 them into valid switches. The result is -and(ed) together."
224 (find-and (mapcar (lambda (x)
225 (concat (find-to-string x) "\\; "))
226 form)))
228 (defun find-to-string (form)
229 "Parse FORM to produce a set of valid find arguments."
230 (cond
231 ((stringp form)
232 form)
233 ((consp form)
234 (let ((option (cdr (assoc (car form) find-constituents))))
235 (cond
236 ((and (symbolp option) (fboundp option))
237 (funcall option (cdr form)))
238 ((consp option)
239 (let ((option (symbol-name (car form)))
240 (argcnt (car option))
241 (oper (cadr option))
242 (dont-quote (car (cddr option))))
243 (find-to-string
244 (find-generic option oper argcnt (cdr form) dont-quote))))
246 (error "Sorry I don't know how to handle '%s'" (car form))))))))
248 (provide 'find-cmd)
250 ;;; find-cmd.el ends here