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455 lines
16 KiB
EmacsLisp
455 lines
16 KiB
EmacsLisp
;;; em-cmpl.el --- completion using the TAB key
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;; Copyright (C) 1999, 2000, 2002, 2003, 2004,
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;; 2005, 2006 Free Software Foundation, Inc.
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;; Author: John Wiegley <johnw@gnu.org>
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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(provide 'em-cmpl)
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(eval-when-compile (require 'esh-maint))
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(require 'esh-util)
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(defgroup eshell-cmpl nil
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"This module provides a programmable completion function bound to
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the TAB key, which allows for completing command names, file names,
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variable names, arguments, etc."
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:tag "Argument completion"
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:group 'eshell-module)
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;;; Commentary:
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;; Eshell, by using the pcomplete package, provides a full
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;; programmable completion facility that is comparable to shells like
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;; tcsh or zsh.
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;;
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;; Completions are context-sensitive, which means that pressing <TAB>
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;; after the command 'rmdir' will result in a list of directories,
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;; while doing so after 'rm' will result in a list of all file
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;; entries.
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;;
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;; Many builtin completion rules are provided, for commands such as
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;; `cvs', or RedHat's `rpm' utility. Adding new completion rules is
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;; no more difficult than writing a plain Lisp functions, and they can
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;; be debugged, profiled, and compiled using exactly the same
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;; facilities (since in fact, they *are* just Lisp functions). See
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;; the definition of the function `pcomplete/make' for an example of
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;; how to write a completion function.
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;;
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;; The completion facility is very easy to use. Just press TAB. If
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;; there are a large number of possible completions, a buffer will
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;; appear showing a list of them. Completions may be selected from
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;; that buffer using the mouse. If no completion is selected, and the
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;; user starts doing something else, the display buffer will
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;; automatically disappear.
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;;
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;; If the list of possible completions is very small, Eshell will
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;; "cycle" through them, selecting a different entry each time <TAB>
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;; is pressed. <S-TAB> may be used to cycle in the opposite
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;; direction.
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;;
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;; Glob patterns can also be cycled. For example, entering 'echo
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;; x*<tab>' will cycle through all the filenames beginning with 'x'.
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;; This is done because the glob list is treated as though it were a
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;; list of possible completions. Pressing <C-c SPC> will insert all
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;; of the matching glob patterns at point.
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;;
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;; If a Lisp form is being entered, <TAB> will complete the Lisp
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;; symbol name, in exactly the same way that <M-TAB> does in Emacs
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;; Lisp mode.
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;;
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;; The list of possible completions can be viewed at any point by
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;; pressing <M-?>.
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;;
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;; Finally, context-related help can be accessed by pressing <C-c i>.
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;; This only works well if the completion function has provided Eshell
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;; with sufficient pointers to locate the relevant help text.
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;;; User Variables:
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(defcustom eshell-cmpl-load-hook '(eshell-cmpl-initialize)
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"*A list of functions to run when `eshell-cmpl' is loaded."
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:type 'hook
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:group 'eshell-cmpl)
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(defcustom eshell-show-lisp-completions nil
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"*If non-nil, include Lisp functions in the command completion list.
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If this variable is nil, Lisp completion can still be done in command
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position by using M-TAB instead of TAB."
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:type 'boolean
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:group 'eshell-cmpl)
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(defcustom eshell-show-lisp-alternatives t
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"*If non-nil, and no other completions found, show Lisp functions.
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Setting this variable means nothing if `eshell-show-lisp-completions'
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is non-nil."
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:type 'boolean
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:group 'eshell-cmpl)
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(defcustom eshell-no-completion-during-jobs t
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"*If non-nil, don't allow completion while a process is running."
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:type 'boolean
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:group 'eshell-cmpl)
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(defcustom eshell-command-completions-alist
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'(("acroread" . "\\.pdf\\'")
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("xpdf" . "\\.pdf\\'")
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("ar" . "\\.[ao]\\'")
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("gcc" . "\\.[Cc]\\([Cc]\\|[Pp][Pp]\\)?\\'")
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("g++" . "\\.[Cc]\\([Cc]\\|[Pp][Pp]\\)?\\'")
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("cc" . "\\.[Cc]\\([Cc]\\|[Pp][Pp]\\)?\\'")
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("CC" . "\\.[Cc]\\([Cc]\\|[Pp][Pp]\\)?\\'")
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("acc" . "\\.[Cc]\\([Cc]\\|[Pp][Pp]\\)?\\'")
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("bcc" . "\\.[Cc]\\([Cc]\\|[Pp][Pp]\\)?\\'")
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("readelf" . "\\(\\`[^.]*\\|\\.\\([ao]\\|so\\)\\)\\'")
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("objdump" . "\\(\\`[^.]*\\|\\.\\([ao]\\|so\\)\\)\\'")
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("nm" . "\\(\\`[^.]*\\|\\.\\([ao]\\|so\\)\\)\\'")
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("gdb" . "\\`\\([^.]*\\|a\\.out\\)\\'")
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("dbx" . "\\`\\([^.]*\\|a\\.out\\)\\'")
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("sdb" . "\\`\\([^.]*\\|a\\.out\\)\\'")
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("adb" . "\\`\\([^.]*\\|a\\.out\\)\\'"))
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"*An alist that defines simple argument type correlations.
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This is provided for common commands, as a simplistic alternative
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to writing a completion function."
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:type '(repeat (cons string regexp))
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:group 'eshell-cmpl)
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(defcustom eshell-cmpl-file-ignore "~\\'"
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(documentation-property 'pcomplete-file-ignore
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'variable-documentation)
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:type (get 'pcomplete-file-ignore 'custom-type)
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:group 'eshell-cmpl)
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(defcustom eshell-cmpl-dir-ignore "\\`\\(\\.\\.?\\|CVS\\)/\\'"
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(documentation-property 'pcomplete-dir-ignore
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'variable-documentation)
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:type (get 'pcomplete-dir-ignore 'custom-type)
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:group 'eshell-cmpl)
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(defcustom eshell-cmpl-ignore-case (eshell-under-windows-p)
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(documentation-property 'pcomplete-ignore-case
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'variable-documentation)
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:type (get 'pcomplete-ignore-case 'custom-type)
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:group 'eshell-cmpl)
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(defcustom eshell-cmpl-autolist nil
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(documentation-property 'pcomplete-autolist
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'variable-documentation)
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:type (get 'pcomplete-autolist 'custom-type)
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:group 'eshell-cmpl)
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(defcustom eshell-cmpl-suffix-list (list ?/ ?:)
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(documentation-property 'pcomplete-suffix-list
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'variable-documentation)
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:type (get 'pcomplete-suffix-list 'custom-type)
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:group 'pcomplete)
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(defcustom eshell-cmpl-recexact nil
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(documentation-property 'pcomplete-recexact
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'variable-documentation)
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:type (get 'pcomplete-recexact 'custom-type)
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:group 'eshell-cmpl)
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(defcustom eshell-cmpl-man-function 'man
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(documentation-property 'pcomplete-man-function
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'variable-documentation)
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:type (get 'pcomplete-man-function 'custom-type)
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:group 'eshell-cmpl)
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(defcustom eshell-cmpl-compare-entry-function 'file-newer-than-file-p
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(documentation-property 'pcomplete-compare-entry-function
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'variable-documentation)
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:type (get 'pcomplete-compare-entry-function 'custom-type)
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:group 'eshell-cmpl)
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(defcustom eshell-cmpl-expand-before-complete nil
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(documentation-property 'pcomplete-expand-before-complete
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'variable-documentation)
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:type (get 'pcomplete-expand-before-complete 'custom-type)
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:group 'eshell-cmpl)
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(defcustom eshell-cmpl-cycle-completions t
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(documentation-property 'pcomplete-cycle-completions
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'variable-documentation)
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:type (get 'pcomplete-cycle-completions 'custom-type)
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:group 'eshell-cmpl)
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(defcustom eshell-cmpl-cycle-cutoff-length 5
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(documentation-property 'pcomplete-cycle-cutoff-length
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'variable-documentation)
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:type (get 'pcomplete-cycle-cutoff-length 'custom-type)
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:group 'eshell-cmpl)
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(defcustom eshell-cmpl-restore-window-delay 1
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(documentation-property 'pcomplete-restore-window-delay
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'variable-documentation)
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:type (get 'pcomplete-restore-window-delay 'custom-type)
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:group 'eshell-cmpl)
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(defcustom eshell-command-completion-function
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(function
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(lambda ()
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(pcomplete-here (eshell-complete-commands-list))))
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(documentation-property 'pcomplete-command-completion-function
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'variable-documentation)
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:type (get 'pcomplete-command-completion-function 'custom-type)
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:group 'eshell-cmpl)
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(defcustom eshell-cmpl-command-name-function
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'eshell-completion-command-name
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(documentation-property 'pcomplete-command-name-function
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'variable-documentation)
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:type (get 'pcomplete-command-name-function 'custom-type)
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:group 'eshell-cmpl)
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(defcustom eshell-default-completion-function
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(function
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(lambda ()
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(while (pcomplete-here
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(pcomplete-dirs-or-entries
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(cdr (assoc (funcall eshell-cmpl-command-name-function)
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eshell-command-completions-alist)))))))
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(documentation-property 'pcomplete-default-completion-function
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'variable-documentation)
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:type (get 'pcomplete-default-completion-function 'custom-type)
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:group 'eshell-cmpl)
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(defcustom eshell-cmpl-use-paring t
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(documentation-property 'pcomplete-use-paring 'variable-documentation)
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:type (get 'pcomplete-use-paring 'custom-type)
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:group 'eshell-cmpl)
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;;; Functions:
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(defun eshell-cmpl-initialize ()
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"Initialize the completions module."
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(unless (fboundp 'pcomplete)
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(load "pcmpl-auto" t t))
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(set (make-local-variable 'pcomplete-command-completion-function)
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eshell-command-completion-function)
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(set (make-local-variable 'pcomplete-command-name-function)
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eshell-cmpl-command-name-function)
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(set (make-local-variable 'pcomplete-default-completion-function)
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eshell-default-completion-function)
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(set (make-local-variable 'pcomplete-parse-arguments-function)
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'eshell-complete-parse-arguments)
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(set (make-local-variable 'pcomplete-file-ignore)
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eshell-cmpl-file-ignore)
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(set (make-local-variable 'pcomplete-dir-ignore)
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eshell-cmpl-dir-ignore)
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(set (make-local-variable 'pcomplete-ignore-case)
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eshell-cmpl-ignore-case)
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(set (make-local-variable 'pcomplete-autolist)
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eshell-cmpl-autolist)
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(set (make-local-variable 'pcomplete-suffix-list)
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eshell-cmpl-suffix-list)
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(set (make-local-variable 'pcomplete-recexact)
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eshell-cmpl-recexact)
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(set (make-local-variable 'pcomplete-man-function)
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eshell-cmpl-man-function)
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(set (make-local-variable 'pcomplete-compare-entry-function)
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eshell-cmpl-compare-entry-function)
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(set (make-local-variable 'pcomplete-expand-before-complete)
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eshell-cmpl-expand-before-complete)
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(set (make-local-variable 'pcomplete-cycle-completions)
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eshell-cmpl-cycle-completions)
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(set (make-local-variable 'pcomplete-cycle-cutoff-length)
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eshell-cmpl-cycle-cutoff-length)
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(set (make-local-variable 'pcomplete-restore-window-delay)
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eshell-cmpl-restore-window-delay)
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(set (make-local-variable 'pcomplete-use-paring)
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eshell-cmpl-use-paring)
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;; `pcomplete-arg-quote-list' should only be set after all the
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;; load-hooks for any other extension modules have been run, which
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;; is true at the time `eshell-mode-hook' is run
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(add-hook 'eshell-mode-hook
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(function
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(lambda ()
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(set (make-local-variable 'pcomplete-arg-quote-list)
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eshell-special-chars-outside-quoting))) nil t)
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(add-hook 'pcomplete-quote-arg-hook 'eshell-quote-backslash nil t)
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(define-key eshell-mode-map [(meta tab)] 'lisp-complete-symbol)
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(define-key eshell-mode-map [(meta control ?i)] 'lisp-complete-symbol)
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(define-key eshell-command-map [(meta ?h)] 'eshell-completion-help)
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(define-key eshell-command-map [tab] 'pcomplete-expand-and-complete)
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(define-key eshell-command-map [(control ?i)]
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'pcomplete-expand-and-complete)
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(define-key eshell-command-map [space] 'pcomplete-expand)
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(define-key eshell-command-map [? ] 'pcomplete-expand)
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(define-key eshell-mode-map [tab] 'pcomplete)
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(define-key eshell-mode-map [(control ?i)] 'pcomplete)
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;; jww (1999-10-19): Will this work on anything but X?
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(if (eshell-under-xemacs-p)
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(define-key eshell-mode-map [iso-left-tab] 'pcomplete-reverse)
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(define-key eshell-mode-map [(shift iso-lefttab)] 'pcomplete-reverse)
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(define-key eshell-mode-map [(shift control ?i)] 'pcomplete-reverse))
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(define-key eshell-mode-map [(meta ??)] 'pcomplete-list))
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(defun eshell-completion-command-name ()
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"Return the command name, possibly sans globbing."
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(let ((cmd (file-name-nondirectory (pcomplete-arg 'first))))
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(setq cmd (if (and (> (length cmd) 0)
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(eq (aref cmd 0) eshell-explicit-command-char))
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(substring cmd 1)
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cmd))
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(if (eshell-under-windows-p)
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(file-name-sans-extension cmd)
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cmd)))
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(defun eshell-completion-help ()
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(interactive)
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(if (= (point) eshell-last-output-end)
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(describe-prefix-bindings)
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(call-interactively 'pcomplete-help)))
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(defun eshell-complete-parse-arguments ()
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"Parse the command line arguments for `pcomplete-argument'."
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(when (and eshell-no-completion-during-jobs
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(eshell-interactive-process))
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(insert-and-inherit "\t")
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(throw 'pcompleted t))
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(let ((end (point-marker))
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(begin (save-excursion (eshell-bol) (point)))
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(posns (list t))
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args delim)
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(when (memq this-command '(pcomplete-expand
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pcomplete-expand-and-complete))
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(run-hook-with-args 'eshell-expand-input-functions begin end)
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(if (= begin end)
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(end-of-line))
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(setq end (point-marker)))
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(if (setq delim
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(catch 'eshell-incomplete
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(ignore
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(setq args (eshell-parse-arguments begin end)))))
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(cond ((memq (car delim) '(?\{ ?\<))
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(setq begin (1+ (cadr delim))
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args (eshell-parse-arguments begin end)))
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((eq (car delim) ?\()
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(lisp-complete-symbol)
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(throw 'pcompleted t))
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(t
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(insert-and-inherit "\t")
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(throw 'pcompleted t))))
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(when (get-text-property (1- end) 'comment)
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(insert-and-inherit "\t")
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(throw 'pcompleted t))
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(let ((pos begin))
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(while (< pos end)
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(if (get-text-property pos 'arg-begin)
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(nconc posns (list pos)))
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(setq pos (1+ pos))))
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(setq posns (cdr posns))
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(assert (= (length args) (length posns)))
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(let ((a args)
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(i 0)
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l final)
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(while a
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(if (and (consp (car a))
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(eq (caar a) 'eshell-operator))
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(setq l i))
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(setq a (cdr a) i (1+ i)))
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(and l
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(setq args (nthcdr (1+ l) args)
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posns (nthcdr (1+ l) posns))))
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(assert (= (length args) (length posns)))
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(when (and args (eq (char-syntax (char-before end)) ? )
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(not (eq (char-before (1- end)) ?\\)))
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(nconc args (list ""))
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(nconc posns (list (point))))
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(cons (mapcar
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(function
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(lambda (arg)
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(let ((val
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(if (listp arg)
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(let ((result
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(eshell-do-eval
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(list 'eshell-commands arg) t)))
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(assert (eq (car result) 'quote))
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(cadr result))
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arg)))
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(if (numberp val)
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(setq val (number-to-string val)))
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(or val ""))))
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args)
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posns)))
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(defun eshell-complete-commands-list ()
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"Generate list of applicable, visible commands."
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(let ((filename (pcomplete-arg)) glob-name)
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(if (file-name-directory filename)
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(pcomplete-executables)
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(if (and (> (length filename) 0)
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(eq (aref filename 0) eshell-explicit-command-char))
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(setq filename (substring filename 1)
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pcomplete-stub filename
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glob-name t))
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(let* ((paths (split-string (getenv "PATH") path-separator))
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(cwd (file-name-as-directory
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(expand-file-name default-directory)))
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(path "") (comps-in-path ())
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(file "") (filepath "") (completions ()))
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;; Go thru each path in the search path, finding completions.
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(while paths
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(setq path (file-name-as-directory
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(expand-file-name (or (car paths) ".")))
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comps-in-path
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(and (file-accessible-directory-p path)
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(file-name-all-completions filename path)))
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;; Go thru each completion found, to see whether it should
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;; be used.
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(while comps-in-path
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(setq file (car comps-in-path)
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filepath (concat path file))
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(if (and (not (member file completions)) ;
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(or (string-equal path cwd)
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(not (file-directory-p filepath)))
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(file-executable-p filepath))
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(setq completions (cons file completions)))
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(setq comps-in-path (cdr comps-in-path)))
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(setq paths (cdr paths)))
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;; Add aliases which are currently visible, and Lisp functions.
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(pcomplete-uniqify-list
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(if glob-name
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completions
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(setq completions
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(append (and (eshell-using-module 'eshell-alias)
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(funcall (symbol-function 'eshell-alias-completions)
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filename))
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(eshell-winnow-list
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(mapcar
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(function
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(lambda (name)
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(substring name 7)))
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(all-completions (concat "eshell/" filename)
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obarray 'functionp))
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nil '(eshell-find-alias-function))
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completions))
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(append (and (or eshell-show-lisp-completions
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(and eshell-show-lisp-alternatives
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(null completions)))
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(all-completions filename obarray 'functionp))
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completions)))))))
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;;; Code:
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;;; arch-tag: 0e914699-673a-45f8-8cbf-82e1dbc571bc
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;;; em-cmpl.el ends here
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