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;;; finder.el --- topic & keyword-based code finder
;; Copyright (C) 1992 Free Software Foundation, Inc.
;; Author: Eric S. Raymond <esr@snark.thyrsus.com>
;; Created: 16 Jun 1992
;; Version: 1.0
;; Keywords: help
;; 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 1, 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; see the file COPYING. If not, write to
;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
;; Commentary:
;; This mode uses the Keywords library header to provide code-finding
;; services by keyword.
;;
;; Things to do:
;; 1. Support multiple keywords per search. This could be extremely hairy;
;; there doesn't seem to be any way to get completing-read to exit on
;; an EOL with no substring pending, which is what we'd want to end the loop.
;; 2. Search by string in synopsis line?
;; 3. Function to check finder-package-info for unknown keywords.
;;; Code:
(require 'lisp-mnt)
(require 'finder-inf)
(require 'picture)
(defvar finder-known-keywords
'(
(bib . "code related to the bib(1) bibliography processor")
(c . "C and C++ language support")
(calendar . "calendar and time management support")
(docs . "support for Emacs documentation")
(emulations . "emulations of other editors")
(extensions . "Emacs Lisp language extensions")
(games . "games, jokes and amusements")
(hardware . "support for interfacing with exotic hardware")
(help . "support for on-line help systems")
(i14n . "internationalization and alternate character-set support")
(internal . "code for Emacs internals, build process, defaults")
(languages . "specialized modes for editing programming languages")
(lisp . "Lisp support, including Emacs Lisp")
(local . "code local to your site")
(maint . "maintenance aids for the Emacs development group")
(mail . "modes for electronic-mail handling")
(news . "support for netnews reading and posting")
(processes . "process, subshell, compilation, and job control support")
(terminals . "support for terminal types")
(tex . "code related to the TeX formatter")
(tools . "programming tools")
(unix . "front-ends/assistants for, or emulators of, UNIX features")
(vms . "support code for vms")
(wp . "word processing")
))
;;; Code for regenerating the keyword list.
(defvar finder-package-info nil
"Assoc list mapping file names to description & keyword lists.")
(defun finder-compile-keywords (&rest dirs)
"Regenerate the keywords association list into the file finder-inf.el.
Optional arguments are a list of Emacs Lisp directories to compile from; no
arguments compiles from load-path."
(save-excursion
(find-file "finder-inf.el")
(erase-buffer)
(insert ";;; Don't edit this file. It's generated by finder.el\n\n")
(insert "\n(setq finder-package-info '(\n")
(mapcar
(function (lambda (d)
(mapcar
(function (lambda (f)
(if (string-match "\\.el$" f)
(let (summary keystart)
(save-excursion
(set-buffer (get-buffer-create "*finder-scratch*"))
(erase-buffer)
(insert-file-contents
(concat (file-name-as-directory d) f))
(setq summary (lm-synopsis))
(setq keywords (lm-keywords)))
(insert
(format " (\"%s\"\n " f))
(prin1 summary (current-buffer))
(insert
"\n ")
(setq keystart (point))
(insert
(if keywords (format "(%s)" keywords) "nil")
")\n")
(subst-char-in-region keystart (point) ?, ? )
)
)))
(directory-files (or d ".")))
))
(or dirs load-path))
(insert "))\n\n(provide 'finder-inf)\n")
(kill-buffer "*finder-scratch*")
(basic-save-buffer)
))
;;; Now the retrieval code
(defun finder-by-keyword ()
"Find packages matching a given keyword."
(interactive)
(pop-to-buffer "*Help*")
(erase-buffer)
(mapcar
(function (lambda (x)
(insert (symbol-name (car x)))
(insert-at-column 14 (cdr x) "\n")
))
finder-known-keywords)
(goto-char (point-min))
(let (key
(known (mapcar (function (lambda (x) (car x))) finder-known-keywords)))
(let ((key (intern (completing-read
"Package keyword: "
(vconcat known)
(function (lambda (arg) (memq arg known)))
t))))
(erase-buffer)
(insert
"The following packages match the keyword `" (symbol-name key) "':\n\n")
(mapcar
(function (lambda (x)
(if (memq key (car (cdr (cdr x))))
(progn
(insert (car x))
(insert-at-column 16 (car (cdr x)) "\n")
))
))
finder-package-info)
(goto-char (point-min))
)))
(provide 'finder)
;;; finder.el ends here
|
