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a994126968
* lisp/pcomplete.el (pcomplete-from-help): New function (and hash table) to get pcomplete candidates from help messages. (pcomplete-here-using-help): Helper function to define pcomplete for simple commands (pcomplete-completions-at-point): Provide annotation-function and company-docsig properties. * lisp/pcmpl-git.el: New file, provides pcomplete for Git. * lisp/pcmpl-gnu.el: Add pcomplete for awk, gpg and gdb, emacs and emacsclient. * lisp/pcmpl-linux.el: Add pcomplete for systemctl and journalctl. * lisp/pcmpl-rpm.el: Add pcomplete for dnf. * lisp/pcmpl-unix.el: Add pcomplete for sudo and most commands found in GNU Coreutils. * lisp/pcmpl-x.el: Add pcomplete for tex, pdftex, latex, pdflatex, rigrep and rclone. * test/lisp/pcomplete-tests.el (pcomplete-test-parse-gpg-help, pcomplete-test-parse-git-help): Tests for the new functions.
183 lines
6.7 KiB
EmacsLisp
183 lines
6.7 KiB
EmacsLisp
;;; pcmpl-linux.el --- functions for dealing with GNU/Linux completions -*- lexical-binding: t -*-
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;; Copyright (C) 1999-2022 Free Software Foundation, Inc.
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;; Package: pcomplete
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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 3 of the License, or
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;; (at your option) 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. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; These functions are for use with GNU/Linux. Since they depend on a
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;; certain knowledge of the layout of such systems, they probably
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;; won't work very well on other operating systems.
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;;; Code:
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(provide 'pcmpl-linux)
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(require 'pcomplete)
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(eval-when-compile (require 'rx))
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;; Functions:
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;;;###autoload
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(defun pcomplete/kill ()
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"Completion for GNU/Linux `kill', using /proc filesystem."
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(if (pcomplete-match "^-\\(.*\\)" 0)
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(pcomplete-here
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(pcomplete-uniquify-list
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(split-string
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(pcomplete-process-result "kill" "-l")))
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(pcomplete-match-string 1 0)))
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(while (pcomplete-here
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(if (file-directory-p "/proc")
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(directory-files "/proc" nil "\\`[0-9]+\\'"))
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nil #'identity)))
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;;;###autoload
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(defun pcomplete/umount ()
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"Completion for GNU/Linux `umount'."
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(pcomplete-opt "hVafrnvt(pcmpl-linux-fs-types)")
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(while (pcomplete-here (pcmpl-linux-mounted-directories)
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nil #'identity)))
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;;;###autoload
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(defun pcomplete/mount ()
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"Completion for GNU/Linux `mount'."
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(pcomplete-opt "hVanfFrsvwt(pcmpl-linux-fs-types)o?L?U?")
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(while (pcomplete-here (pcomplete-entries) nil #'identity)))
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(defconst pcmpl-linux-fs-modules-path-format "/lib/modules/%s/kernel/fs/")
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(defun pcmpl-linux-fs-types ()
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"Return a list of available fs modules on GNU/Linux systems."
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(let ((kernel-ver (pcomplete-process-result "uname" "-r")))
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(directory-files
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(format pcmpl-linux-fs-modules-path-format kernel-ver))))
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(defconst pcmpl-linux-mtab-file "/etc/mtab")
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(defun pcmpl-linux-mounted-directories ()
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"Return a list of mounted directory names."
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(let (points)
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(when (file-readable-p pcmpl-linux-mtab-file)
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(with-temp-buffer
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(insert-file-contents-literally pcmpl-linux-mtab-file)
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(while (not (eobp))
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(let* ((line (buffer-substring (point) (line-end-position)))
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(args (split-string line " ")))
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(setq points (cons (nth 1 args) points)))
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(forward-line)))
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(pcomplete-uniquify-list points))))
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(defun pcomplete-pare-list (l r)
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"Destructively remove from list L all elements matching any in list R.
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Test is done using `equal'."
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(while (and l (and r (member (car l) r)))
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(setq l (cdr l)))
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(let ((m l))
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(while m
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(while (and (cdr m)
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(and r (member (cadr m) r)))
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(setcdr m (cddr m)))
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(setq m (cdr m))))
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l)
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(defun pcmpl-linux-mountable-directories ()
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"Return a list of mountable directory names."
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(let (points)
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(when (file-readable-p "/etc/fstab")
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(with-temp-buffer
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(insert-file-contents-literally "/etc/fstab")
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(while (not (eobp))
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(let* ((line (buffer-substring (point) (line-end-position)))
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(args (split-string line "\\s-+")))
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(setq points (cons (nth 1 args) points)))
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(forward-line)))
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(pcomplete-pare-list
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(pcomplete-uniquify-list points)
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(cons "swap" (pcmpl-linux-mounted-directories))))))
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;;; systemd
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(defun pcmpl-linux--systemd-units (&rest args)
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"Run `systemd list-units ARGS' and return the output as a list."
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(with-temp-buffer
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(apply #'call-process
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"systemctl" nil '(t nil) nil
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"list-units" "--full" "--legend=no" "--plain" args)
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(goto-char (point-min))
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(let (result)
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(while (re-search-forward (rx bol (group (+ (not space)))
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(+ space) (+ (not space))
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(+ space) (group (+ (not space)))
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(+ space) (+ (not space))
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(+ space) (group (* nonl)))
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nil t)
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(push (match-string 1) result)
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(put-text-property 0 1 'pcomplete-annotation
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(concat " " (match-string 2))
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(car result))
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(put-text-property 0 1 'pcomplete-description
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(match-string 3)
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(car result)))
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(nreverse result))))
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;;;###autoload
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(defun pcomplete/systemctl ()
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"Completion for the `systemctl' command."
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(let ((subcmds (pcomplete-from-help
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"systemctl --help"
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:margin (rx bol " " (group) alpha)
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:argument (rx (+ (any alpha ?-)))
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:metavar (rx (group (+ " " (>= 2 (any upper "[]|."))))))))
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(while (not (member (pcomplete-arg 1) subcmds))
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(if (string-prefix-p "-" (pcomplete-arg 0))
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(pcomplete-here (pcomplete-from-help "systemctl --help"
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:metavar "[^ ]+"
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:separator " \\(\\)-"))
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(pcomplete-here subcmds)))
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(let ((subcmd (pcomplete-arg 1))
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(context (if (member "--user" pcomplete-args) "--user" "--system")))
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(while (pcase subcmd
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((guard (string-prefix-p "-" (pcomplete-arg 0)))
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(pcomplete-here
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(pcomplete-from-help "systemctl --help")))
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;; TODO: suggest only relevant units to each subcommand
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("start"
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(pcomplete-here
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(pcmpl-linux--systemd-units context "--state" "inactive,failed")))
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((or "restart" "stop")
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(pcomplete-here
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(pcmpl-linux--systemd-units context "--state" "active")))
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(_ (pcomplete-here
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(completion-table-in-turn
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(pcmpl-linux--systemd-units context "--all")
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(pcomplete-entries)))))))))
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;;;###autoload
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(defun pcomplete/journalctl ()
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"Completion for the `journalctl' command."
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(while (if (string-prefix-p "-" (pcomplete-arg 0))
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(pcomplete-here (pcomplete-from-help "journalctl --help"
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:metavar "[^ ]+"
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:separator " \\(\\)-"))
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(pcomplete-here (mapcar (lambda (s) (concat s "="))
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(process-lines "journalctl" "--fields"))))))
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;;; pcmpl-linux.el ends here
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