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1 | ;;; finder.el --- topic & keyword-based code finder |
2 | ||
3 | ;; Copyright (C) 1992 Free Software Foundation, Inc. | |
4 | ||
5 | ;; Author: Eric S. Raymond <esr@snark.thyrsus.com> | |
6 | ;; Created: 16 Jun 1992 | |
7 | ;; Version: 1.0 | |
8 | ;; Keywords: help | |
9 | ||
10 | ;; This file is part of GNU Emacs. | |
11 | ||
12 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
13 | ;; it under the terms of the GNU General Public License as published by | |
14 | ;; the Free Software Foundation; either version 1, or (at your option) | |
15 | ;; any later version. | |
16 | ||
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
23 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
24 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | ||
26 | ;; Commentary: | |
27 | ||
28 | ;; This mode uses the Keywords library header to provide code-finding | |
29 | ;; services by keyword. | |
30 | ;; | |
31 | ;; Things to do: | |
32 | ;; 1. Support multiple keywords per search. This could be extremely hairy; | |
33 | ;; there doesn't seem to be any way to get completing-read to exit on | |
34 | ;; an EOL with no substring pending, which is what we'd want to end the loop. | |
35 | ;; 2. Search by string in synopsis line? | |
36 | ;; 3. Function to check finder-package-info for unknown keywords. | |
37 | ||
38 | ;;; Code: | |
39 | ||
40 | (require 'lisp-mnt) | |
41 | (require 'finder-inf) | |
42 | (require 'picture) | |
43 | ||
44 | (defvar finder-known-keywords | |
45 | '( | |
46 | (bib . "code related to the bib(1) bibliography processor") | |
47 | (c . "C and C++ language support") | |
48 | (calendar . "calendar and time management support") | |
49 | (docs . "support for Emacs documentation") | |
50 | (emulations . "emulations of other editors") | |
51 | (extensions . "Emacs Lisp language extensions") | |
52 | (games . "games, jokes and amusements") | |
53 | (hardware . "support for interfacing with exotic hardware") | |
54 | (help . "support for on-line help systems") | |
55 | (i14n . "internationalization and alternate character-set support") | |
56 | (internal . "code for Emacs internals, build process, defaults") | |
57 | (languages . "specialized modes for editing programming languages") | |
58 | (lisp . "Lisp support, including Emacs Lisp") | |
59 | (local . "code local to your site") | |
60 | (maint . "maintenance aids for the Emacs development group") | |
61 | (mail . "modes for electronic-mail handling") | |
62 | (news . "support for netnews reading and posting") | |
63 | (processes . "process, subshell, compilation, and job control support") | |
64 | (terminals . "support for terminal types") | |
65 | (tex . "code related to the TeX formatter") | |
66 | (tools . "programming tools") | |
67 | (unix . "front-ends/assistants for, or emulators of, UNIX features") | |
68 | (vms . "support code for vms") | |
69 | (wp . "word processing") | |
70 | )) | |
71 | ||
72 | ;;; Code for regenerating the keyword list. | |
73 | ||
74 | (defvar finder-package-info nil | |
75 | "Assoc list mapping file names to description & keyword lists.") | |
76 | ||
77 | (defun finder-compile-keywords (&rest dirs) | |
78 | "Regenerate the keywords association list into the file finder-inf.el. | |
79 | Optional arguments are a list of Emacs Lisp directories to compile from; no | |
80 | arguments compiles from load-path." | |
81 | (save-excursion | |
82 | (find-file "finder-inf.el") | |
83 | (erase-buffer) | |
84 | (insert ";;; Don't edit this file. It's generated by finder.el\n\n") | |
85 | (insert "\n(setq finder-package-info '(\n") | |
86 | (mapcar | |
87 | (function (lambda (d) | |
88 | (mapcar | |
89 | (function (lambda (f) | |
90 | (if (string-match "\\.el$" f) | |
91 | (let (summary keystart) | |
92 | (save-excursion | |
93 | (set-buffer (get-buffer-create "*finder-scratch*")) | |
94 | (erase-buffer) | |
95 | (insert-file-contents | |
96 | (concat (file-name-as-directory d) f)) | |
97 | (setq summary (lm-synopsis)) | |
98 | (setq keywords (lm-keywords))) | |
99 | (insert | |
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100 | (format " (\"%s\"\n " f)) |
101 | (prin1 summary (current-buffer)) | |
102 | (insert | |
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103 | "\n ") |
104 | (setq keystart (point)) | |
105 | (insert | |
106 | (if keywords (format "(%s)" keywords) "nil") | |
107 | ")\n") | |
108 | (subst-char-in-region keystart (point) ?, ? ) | |
109 | ) | |
110 | ))) | |
111 | (directory-files (or d "."))) | |
112 | )) | |
113 | (or dirs load-path)) | |
114 | (insert "))\n\n(provide 'finder-inf)\n") | |
115 | (kill-buffer "*finder-scratch*") | |
116 | (basic-save-buffer) | |
117 | )) | |
118 | ||
119 | ;;; Now the retrieval code | |
120 | ||
121 | (defun finder-by-keyword () | |
122 | "Find packages matching a given keyword." | |
123 | (interactive) | |
124 | (pop-to-buffer "*Help*") | |
125 | (erase-buffer) | |
126 | (mapcar | |
127 | (function (lambda (x) | |
128 | (insert (symbol-name (car x))) | |
129 | (insert-at-column 14 (cdr x) "\n") | |
130 | )) | |
131 | finder-known-keywords) | |
132 | (goto-char (point-min)) | |
133 | (let (key | |
134 | (known (mapcar (function (lambda (x) (car x))) finder-known-keywords))) | |
135 | (let ((key (intern (completing-read | |
136 | "Package keyword: " | |
137 | (vconcat known) | |
138 | (function (lambda (arg) (memq arg known))) | |
139 | t)))) | |
140 | (erase-buffer) | |
141 | (insert | |
142 | "The following packages match the keyword `" (symbol-name key) "':\n\n") | |
143 | (mapcar | |
144 | (function (lambda (x) | |
145 | (if (memq key (car (cdr (cdr x)))) | |
146 | (progn | |
147 | (insert (car x)) | |
148 | (insert-at-column 16 (car (cdr x)) "\n") | |
149 | )) | |
150 | )) | |
151 | finder-package-info) | |
152 | (goto-char (point-min)) | |
153 | ))) | |
154 | ||
155 | (provide 'finder) | |
156 | ||
157 | ;;; finder.el ends here |