emacs: Add shell completions for "guix" command.
Suggested by Ludovic Courtès <ludo@gnu.org>. * emacs/guix-pcomplete.el: New file. * emacs.am (ELFILES): Add it. * doc/emacs.texi (Emacs Completions): New node.
This commit is contained in:
Alex Kost
parent
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3 changed files with 425 additions and 0 deletions
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@ -19,6 +19,7 @@ guix package}). Specifically, ``guix.el'' makes it easy to:
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* Usage: Emacs Usage. Using the interface.
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* Usage: Emacs Usage. Using the interface.
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* Configuration: Emacs Configuration. Configuring the interface.
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* Configuration: Emacs Configuration. Configuring the interface.
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* Prettify Mode: Emacs Prettify. Abbreviating @file{/gnu/store/@dots{}} file names.
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* Prettify Mode: Emacs Prettify. Abbreviating @file{/gnu/store/@dots{}} file names.
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* Completions: Emacs Completions. Completing @command{guix} shell command.
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@end menu
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@end menu
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@node Emacs Initial Setup
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@node Emacs Initial Setup
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@ -489,3 +490,34 @@ mode hooks (@pxref{Hooks,,, emacs, The GNU Emacs Manual}), for example:
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(add-hook 'shell-mode-hook 'guix-prettify-mode)
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(add-hook 'shell-mode-hook 'guix-prettify-mode)
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(add-hook 'dired-mode-hook 'guix-prettify-mode)
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(add-hook 'dired-mode-hook 'guix-prettify-mode)
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@end example
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@end example
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@node Emacs Completions
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@subsection Shell Completions
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Another feature that becomes available after configuring Emacs interface
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(@pxref{Emacs Initial Setup}) is completing of @command{guix}
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subcommands, options, packages and other things in @code{shell}
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(@pxref{Interactive Shell,,, emacs, The GNU Emacs Manual}) and
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@code{eshell} (@pxref{Top,,, eshell, Eshell: The Emacs Shell}).
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It works the same way as other completions do. Just press @key{TAB}
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when your intuition tells you.
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And here are some examples, where pressing @key{TAB} may complete
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something:
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@itemize @w{}
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@item @code{guix pa}@key{TAB}
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@item @code{guix package -}@key{TAB}
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@item @code{guix package --}@key{TAB}
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@item @code{guix package -i gei}@key{TAB}
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@item @code{guix build -L/tm}@key{TAB}
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@item @code{guix build --sy}@key{TAB}
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@item @code{guix build --system=i}@key{TAB}
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@item @code{guix system rec}@key{TAB}
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@item @code{guix lint --checkers=sy}@key{TAB}
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@item @code{guix lint --checkers=synopsis,des}@key{TAB}
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@end itemize
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1
emacs.am
1
emacs.am
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@ -26,6 +26,7 @@ ELFILES = \
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emacs/guix-info.el \
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emacs/guix-info.el \
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emacs/guix-list.el \
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emacs/guix-list.el \
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emacs/guix-messages.el \
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emacs/guix-messages.el \
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emacs/guix-pcomplete.el \
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emacs/guix-prettify.el \
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emacs/guix-prettify.el \
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emacs/guix-utils.el \
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emacs/guix-utils.el \
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emacs/guix.el
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emacs/guix.el
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392
emacs/guix-pcomplete.el
Normal file
392
emacs/guix-pcomplete.el
Normal file
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@ -0,0 +1,392 @@
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;;; guix-pcomplete.el --- Functions for completing guix commands -*- lexical-binding: t -*-
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;; Copyright © 2015 Alex Kost <alezost@gmail.com>
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;; This file is part of GNU Guix.
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;; GNU Guix 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 Guix 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 this program. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This file provides completions for "guix" command that may be used in
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;; `shell', `eshell' and wherever `pcomplete' works.
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;;; Code:
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(require 'pcomplete)
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(require 'pcmpl-unix)
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(require 'cl-lib)
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(require 'guix-utils)
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;;; Regexps for parsing various "guix ..." outputs
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(defvar guix-pcomplete-parse-package-regexp
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(rx bol (group (one-or-more (not blank))))
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"Regexp used to find names of the packages.")
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(defvar guix-pcomplete-parse-command-regexp
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(rx bol " "
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(group wordchar (one-or-more (or wordchar "-"))))
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"Regexp used to find guix commands.
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'Command' means any option not prefixed with '-'. For example,
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guix subcommand, system action, importer, etc.")
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(defvar guix-pcomplete-parse-long-option-regexp
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(rx (or " " ", ")
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(group "--" (one-or-more (or wordchar "-"))
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(zero-or-one "=")))
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"Regexp used to find long options.")
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(defvar guix-pcomplete-parse-short-option-regexp
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(rx bol (one-or-more blank)
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"-" (group (not (any "- "))))
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"Regexp used to find short options.")
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(defvar guix-pcomplete-parse-linter-regexp
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(rx bol "- " (group (one-or-more (or wordchar "-"))))
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"Regexp used to find 'lint' checkers.")
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(defvar guix-pcomplete-parse-regexp-group 1
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"Parenthesized expression of regexps used to find commands and
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options.")
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;;; Non-receivable completions
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(defvar guix-pcomplete-systems
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'("x86_64-linux" "i686-linux" "armhf-linux" "mips64el-linux")
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"List of supported systems.")
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(defvar guix-pcomplete-hash-formats
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'("nix-base32" "base32" "base16" "hex" "hexadecimal")
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"List of supported hash formats.")
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(defvar guix-pcomplete-refresh-subsets
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'("core" "non-core")
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"List of supported 'refresh' subsets.")
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(defvar guix-pcomplete-key-policies
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'("interactive" "always" "never")
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"List of supported key download policies.")
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;;; Interacting with guix
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(defcustom guix-pcomplete-guix-program (executable-find "guix")
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"Name of the 'guix' program.
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It is used to find guix commands, options, packages, etc."
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:type 'file
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:group 'pcomplete
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:group 'guix)
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(defun guix-pcomplete-run-guix (&rest args)
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"Run `guix-pcomplete-guix-program' with ARGS.
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Insert the output to the current buffer."
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(apply #'call-process
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guix-pcomplete-guix-program nil t nil args))
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(defun guix-pcomplete-run-guix-and-search (regexp &optional group
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&rest args)
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"Run `guix-pcomplete-guix-program' with ARGS and search for matches.
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Return a list of strings matching REGEXP.
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GROUP specifies a parenthesized expression used in REGEXP."
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(with-temp-buffer
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(apply #'guix-pcomplete-run-guix args)
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(goto-char (point-min))
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(let (result)
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(while (re-search-forward regexp nil t)
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(push (match-string-no-properties group) result))
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(nreverse result))))
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(defmacro guix-pcomplete-define-options-finder (name docstring regexp
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&optional filter)
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"Define function NAME to receive guix options and commands.
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The defined function takes an optional COMMAND argument. This
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function will run 'guix COMMAND --help' (or 'guix --help' if
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COMMAND is nil) using `guix-pcomplete-run-guix-and-search' and
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return its result.
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If FILTER is specified, it should be a function. The result is
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passed to this FILTER as argument and the result value of this
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function call is returned."
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(declare (doc-string 2) (indent 1))
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`(guix-memoized-defun ,name (&optional command)
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,docstring
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(let* ((args '("--help"))
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(args (if command (cons command args) args))
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(res (apply #'guix-pcomplete-run-guix-and-search
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,regexp guix-pcomplete-parse-regexp-group args)))
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,(if filter
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`(funcall ,filter res)
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'res))))
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(guix-pcomplete-define-options-finder guix-pcomplete-commands
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"If COMMAND is nil, return a list of available guix commands.
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If COMMAND is non-nil (it should be a string), return available
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subcommands, actions, etc. for this guix COMMAND."
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guix-pcomplete-parse-command-regexp)
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(guix-pcomplete-define-options-finder guix-pcomplete-long-options
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"Return a list of available long options for guix COMMAND."
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guix-pcomplete-parse-long-option-regexp)
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(guix-pcomplete-define-options-finder guix-pcomplete-short-options
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"Return a string with available short options for guix COMMAND."
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guix-pcomplete-parse-short-option-regexp
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(lambda (list)
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(mapconcat #'identity list "")))
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(guix-memoized-defun guix-pcomplete-all-packages ()
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"Return a list of all available Guix packages."
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(guix-pcomplete-run-guix-and-search
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guix-pcomplete-parse-package-regexp
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guix-pcomplete-parse-regexp-group
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"package" "--list-available"))
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(guix-memoized-defun guix-pcomplete-installed-packages (&optional profile)
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"Return a list of Guix packages installed in PROFILE."
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(let* ((args (and profile
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(list (concat "--profile=" profile))))
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(args (append '("package" "--list-installed") args)))
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(apply #'guix-pcomplete-run-guix-and-search
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guix-pcomplete-parse-package-regexp
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guix-pcomplete-parse-regexp-group
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args)))
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(guix-memoized-defun guix-pcomplete-lint-checkers ()
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"Return a list of all available lint checkers."
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(guix-pcomplete-run-guix-and-search
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guix-pcomplete-parse-linter-regexp
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guix-pcomplete-parse-regexp-group
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"lint" "--list-checkers"))
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;;; Completing
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(defvar guix-pcomplete-option-regexp (rx string-start "-")
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"Regexp to match an option.")
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(defvar guix-pcomplete-long-option-regexp (rx string-start "--")
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"Regexp to match a long option.")
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(defvar guix-pcomplete-long-option-with-arg-regexp
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(rx string-start
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(group "--" (one-or-more any)) "="
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(group (zero-or-more any)))
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"Regexp to match a long option with its argument.
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The first parenthesized group defines the option and the second
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group - the argument.")
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(defvar guix-pcomplete-short-option-with-arg-regexp
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(rx string-start
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(group "-" (not (any "-")))
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(group (zero-or-more any)))
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"Regexp to match a short option with its argument.
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The first parenthesized group defines the option and the second
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group - the argument.")
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(defun guix-pcomplete-match-option ()
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"Return non-nil, if the current argument is an option."
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(pcomplete-match guix-pcomplete-option-regexp 0))
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(defun guix-pcomplete-match-long-option ()
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"Return non-nil, if the current argument is a long option."
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(pcomplete-match guix-pcomplete-long-option-regexp 0))
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(defun guix-pcomplete-match-long-option-with-arg ()
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"Return non-nil, if the current argument is a long option with value."
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(pcomplete-match guix-pcomplete-long-option-with-arg-regexp 0))
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(defun guix-pcomplete-match-short-option-with-arg ()
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"Return non-nil, if the current argument is a short option with value."
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(pcomplete-match guix-pcomplete-short-option-with-arg-regexp 0))
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(defun guix-pcomplete-long-option-arg (option args)
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"Return a long OPTION's argument from a list of arguments ARGS."
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(let* ((re (concat "\\`" option "=\\(.*\\)"))
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(args (cl-member-if (lambda (arg)
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(string-match re arg))
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args))
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(cur (car args)))
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(when cur
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(match-string-no-properties 1 cur))))
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(defun guix-pcomplete-short-option-arg (option args)
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"Return a short OPTION's argument from a list of arguments ARGS."
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(let* ((re (concat "\\`" option "\\(.*\\)"))
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(args (cl-member-if (lambda (arg)
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(string-match re arg))
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args))
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(cur (car args)))
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(when cur
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(let ((arg (match-string-no-properties 1 cur)))
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(if (string= "" arg)
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(cadr args) ; take the next arg
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arg)))))
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(defun guix-pcomplete-complete-comma-args (entries)
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"Complete comma separated arguments using ENTRIES."
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(let ((index pcomplete-index))
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(while (= index pcomplete-index)
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(let* ((args (if (or (guix-pcomplete-match-long-option-with-arg)
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(guix-pcomplete-match-short-option-with-arg))
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(pcomplete-match-string 2 0)
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(pcomplete-arg 0)))
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(input (if (string-match ".*,\\(.*\\)" args)
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(match-string-no-properties 1 args)
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args)))
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(pcomplete-here* entries input)))))
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(defun guix-pcomplete-complete-command-arg (command)
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"Complete argument for guix COMMAND."
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(cond
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((member command
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'("archive" "build" "environment" "lint" "refresh"))
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(while t
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(pcomplete-here (guix-pcomplete-all-packages))))
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(t (pcomplete-here* (pcomplete-entries)))))
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(defun guix-pcomplete-complete-option-arg (command option &optional input)
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"Complete argument for COMMAND's OPTION.
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INPUT is the current partially completed string."
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(cl-flet ((option? (short long)
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(or (string= option short)
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(string= option long)))
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(command? (&rest commands)
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(member command commands))
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(complete (entries)
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(pcomplete-here entries input nil t))
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(complete* (entries)
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(pcomplete-here* entries input t)))
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(cond
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((option? "-L" "--load-path")
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(complete* (pcomplete-dirs)))
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((string= "--key-download" option)
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(complete* guix-pcomplete-key-policies))
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((command? "package")
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(cond
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;; For '--install[=]' and '--remove[=]', try to complete a package
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;; name (INPUT) after the "=" sign, and then the rest packages
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;; separated with spaces.
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((option? "-i" "--install")
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(complete (guix-pcomplete-all-packages))
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(while (not (guix-pcomplete-match-option))
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(pcomplete-here (guix-pcomplete-all-packages))))
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((option? "-r" "--remove")
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(let* ((profile (or (guix-pcomplete-short-option-arg
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"-p" pcomplete-args)
|
||||||
|
(guix-pcomplete-long-option-arg
|
||||||
|
"--profile" pcomplete-args)))
|
||||||
|
(profile (and profile (expand-file-name profile))))
|
||||||
|
(complete (guix-pcomplete-installed-packages profile))
|
||||||
|
(while (not (guix-pcomplete-match-option))
|
||||||
|
(pcomplete-here (guix-pcomplete-installed-packages profile)))))
|
||||||
|
((string= "--show" option)
|
||||||
|
(complete (guix-pcomplete-all-packages)))
|
||||||
|
((option? "-p" "--profile")
|
||||||
|
(complete* (pcomplete-dirs)))
|
||||||
|
((option? "-m" "--manifest")
|
||||||
|
(complete* (pcomplete-entries)))))
|
||||||
|
|
||||||
|
((and (command? "archive" "build")
|
||||||
|
(option? "-s" "--system"))
|
||||||
|
(complete* guix-pcomplete-systems))
|
||||||
|
|
||||||
|
((and (command? "build")
|
||||||
|
(option? "-r" "--root"))
|
||||||
|
(complete* (pcomplete-entries)))
|
||||||
|
|
||||||
|
((and (command? "environment")
|
||||||
|
(option? "-l" "--load"))
|
||||||
|
(complete* (pcomplete-entries)))
|
||||||
|
|
||||||
|
((and (command? "hash" "download")
|
||||||
|
(option? "-f" "--format"))
|
||||||
|
(complete* guix-pcomplete-hash-formats))
|
||||||
|
|
||||||
|
((and (command? "lint")
|
||||||
|
(option? "-c" "--checkers"))
|
||||||
|
(guix-pcomplete-complete-comma-args
|
||||||
|
(guix-pcomplete-lint-checkers)))
|
||||||
|
|
||||||
|
((and (command? "publish")
|
||||||
|
(option? "-u" "--user"))
|
||||||
|
(complete* (pcmpl-unix-user-names)))
|
||||||
|
|
||||||
|
((and (command? "refresh")
|
||||||
|
(option? "-s" "--select"))
|
||||||
|
(complete* guix-pcomplete-refresh-subsets)))))
|
||||||
|
|
||||||
|
(defun guix-pcomplete-complete-options (command)
|
||||||
|
"Complete options (with their arguments) for guix COMMAND."
|
||||||
|
(while (guix-pcomplete-match-option)
|
||||||
|
(let ((index pcomplete-index))
|
||||||
|
(if (guix-pcomplete-match-long-option)
|
||||||
|
|
||||||
|
;; Long options.
|
||||||
|
(if (guix-pcomplete-match-long-option-with-arg)
|
||||||
|
(let ((option (pcomplete-match-string 1 0))
|
||||||
|
(arg (pcomplete-match-string 2 0)))
|
||||||
|
(guix-pcomplete-complete-option-arg
|
||||||
|
command option arg))
|
||||||
|
|
||||||
|
(pcomplete-here* (guix-pcomplete-long-options command))
|
||||||
|
;; We support '--opt arg' style (along with '--opt=arg'),
|
||||||
|
;; because 'guix package --install/--remove' may be used this
|
||||||
|
;; way. So try to complete an argument after the option has
|
||||||
|
;; been completed.
|
||||||
|
(unless (guix-pcomplete-match-option)
|
||||||
|
(guix-pcomplete-complete-option-arg
|
||||||
|
command (pcomplete-arg 0 -1))))
|
||||||
|
|
||||||
|
;; Short options.
|
||||||
|
(let ((arg (pcomplete-arg 0)))
|
||||||
|
(if (> (length arg) 2)
|
||||||
|
;; Support specifying an argument after a short option without
|
||||||
|
;; spaces (for example, '-L/tmp/foo').
|
||||||
|
(guix-pcomplete-complete-option-arg
|
||||||
|
command
|
||||||
|
(substring-no-properties arg 0 2)
|
||||||
|
(substring-no-properties arg 2))
|
||||||
|
(pcomplete-opt (guix-pcomplete-short-options command))
|
||||||
|
(guix-pcomplete-complete-option-arg
|
||||||
|
command (pcomplete-arg 0 -1)))))
|
||||||
|
|
||||||
|
;; If there were no completions, move to the next argument and get
|
||||||
|
;; out if the last argument is achieved.
|
||||||
|
(when (= index pcomplete-index)
|
||||||
|
(if (= pcomplete-index pcomplete-last)
|
||||||
|
(throw 'pcompleted nil)
|
||||||
|
(pcomplete-next-arg))))))
|
||||||
|
|
||||||
|
;;;###autoload
|
||||||
|
(defun pcomplete/guix ()
|
||||||
|
"Completion for `guix'."
|
||||||
|
(let ((commands (guix-pcomplete-commands)))
|
||||||
|
(pcomplete-here* (cons "--help" commands))
|
||||||
|
(let ((command (pcomplete-arg 'first 1)))
|
||||||
|
(when (member command commands)
|
||||||
|
(guix-pcomplete-complete-options command)
|
||||||
|
(let ((subcommands (guix-pcomplete-commands command)))
|
||||||
|
(when subcommands
|
||||||
|
(pcomplete-here* subcommands)))
|
||||||
|
(guix-pcomplete-complete-options command)
|
||||||
|
(guix-pcomplete-complete-command-arg command)))))
|
||||||
|
|
||||||
|
(provide 'guix-pcomplete)
|
||||||
|
|
||||||
|
;;; guix-pcomplete.el ends here
|
||||||
Reference in a new issue