403 lines
14 KiB
EmacsLisp
403 lines
14 KiB
EmacsLisp
;;; guix-base.el --- Common definitions -*- lexical-binding: t -*-
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;; Copyright © 2014, 2015, 2016 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 some base and common definitions for guix.el
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;; package.
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;;; Code:
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(require 'cl-lib)
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(require 'guix-backend)
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(require 'guix-guile)
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(require 'guix-read)
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(require 'guix-utils)
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(require 'guix-ui)
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(defgroup guix nil
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"Settings for Guix package manager and friends."
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:prefix "guix-"
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:group 'external)
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(defgroup guix-faces nil
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"Guix faces."
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:group 'guix
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:group 'faces)
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(defun guix-package-name-specification (name version &optional output)
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"Return Guix package specification by its NAME, VERSION and OUTPUT."
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(concat name "-" version
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(when output (concat ":" output))))
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;;; Location of packages, profiles and manifests
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(defvar guix-directory nil
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"Default Guix directory.
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If it is not set by a user, it is set after starting Guile REPL.
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This directory is used to define location of the packages.")
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(defun guix-set-directory ()
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"Set `guix-directory' if needed."
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(or guix-directory
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(setq guix-directory
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(guix-eval-read "%guix-dir"))))
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(add-hook 'guix-after-start-repl-hook 'guix-set-directory)
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(defun guix-find-location (location)
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"Go to LOCATION of a package.
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LOCATION is a string of the form:
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\"PATH:LINE:COLUMN\"
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If PATH is relative, it is considered to be relative to
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`guix-directory'."
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(cl-multiple-value-bind (path line col)
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(split-string location ":")
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(let ((file (expand-file-name path guix-directory))
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(line (string-to-number line))
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(col (string-to-number col)))
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(find-file file)
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(goto-char (point-min))
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(forward-line (- line 1))
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(move-to-column col)
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(recenter 1))))
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(defun guix-package-location (id-or-name)
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"Return location of a package with ID-OR-NAME.
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For the meaning of location, see `guix-find-location'."
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(guix-eval-read (guix-make-guile-expression
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'package-location-string id-or-name)))
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(defun guix-generation-file (profile generation)
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"Return the file name of a PROFILE's GENERATION."
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(format "%s-%s-link" profile generation))
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(defun guix-packages-profile (profile &optional generation system?)
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"Return a directory where packages are installed for the
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PROFILE's GENERATION.
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If SYSTEM? is non-nil, then PROFILE is considered to be a system
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profile. Unlike usual profiles, for a system profile, packages
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are placed in 'profile' subdirectory."
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(let ((profile (if generation
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(guix-generation-file profile generation)
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profile)))
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(if system?
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(expand-file-name "profile" profile)
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profile)))
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(defun guix-manifest-file (profile &optional generation system?)
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"Return the file name of a PROFILE's manifest.
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See `guix-packages-profile'."
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(expand-file-name "manifest"
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(guix-packages-profile profile generation system?)))
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;;;###autoload
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(defun guix-edit (id-or-name)
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"Edit (go to location of) package with ID-OR-NAME."
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(interactive (list (guix-read-package-name)))
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(let ((loc (guix-package-location id-or-name)))
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(if loc
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(guix-find-location loc)
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(message "Couldn't find package location."))))
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;;; Actions on packages and generations
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(defface guix-operation-option-key
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'((t :inherit font-lock-warning-face))
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"Face used for the keys of operation options."
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:group 'guix-faces)
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(defcustom guix-operation-confirm t
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"If nil, do not prompt to confirm an operation."
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:type 'boolean
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:group 'guix)
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(defcustom guix-use-substitutes t
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"If non-nil, use substitutes for the Guix packages."
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:type 'boolean
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:group 'guix)
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(defvar guix-dry-run nil
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"If non-nil, do not perform the real actions, just simulate.")
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(defvar guix-temp-buffer-name " *Guix temp*"
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"Name of a buffer used for displaying info before executing operation.")
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(defvar guix-operation-option-true-string "yes"
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"String displayed in the mode-line when operation option is t.")
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(defvar guix-operation-option-false-string "no "
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"String displayed in the mode-line when operation option is nil.")
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(defvar guix-operation-option-separator " | "
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"String used in the mode-line to separate operation options.")
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(defvar guix-operation-options
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'((?s "substitutes" guix-use-substitutes)
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(?d "dry-run" guix-dry-run))
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"List of available operation options.
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Each element of the list has a form:
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(KEY NAME VARIABLE)
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KEY is a character that may be pressed during confirmation to
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toggle the option.
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NAME is a string displayed in the mode-line.
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VARIABLE is a name of an option variable.")
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(defun guix-operation-option-by-key (key)
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"Return operation option by KEY (character)."
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(assq key guix-operation-options))
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(defun guix-operation-option-key (option)
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"Return key (character) of the operation OPTION."
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(car option))
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(defun guix-operation-option-name (option)
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"Return name of the operation OPTION."
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(nth 1 option))
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(defun guix-operation-option-variable (option)
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"Return name of the variable of the operation OPTION."
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(nth 2 option))
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(defun guix-operation-option-value (option)
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"Return boolean value of the operation OPTION."
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(symbol-value (guix-operation-option-variable option)))
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(defun guix-operation-option-string-value (option)
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"Convert boolean value of the operation OPTION to string and return it."
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(if (guix-operation-option-value option)
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guix-operation-option-true-string
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guix-operation-option-false-string))
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(defun guix-operation-prompt (&optional prompt)
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"Prompt a user for continuing the current operation.
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Return non-nil, if the operation should be continued; nil otherwise.
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Ask a user with PROMPT for continuing an operation."
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(let* ((option-keys (mapcar #'guix-operation-option-key
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guix-operation-options))
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(keys (append '(?y ?n) option-keys))
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(prompt (concat (propertize (or prompt "Continue operation?")
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'face 'minibuffer-prompt)
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" ("
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(mapconcat
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(lambda (key)
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(propertize (string key)
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'face 'guix-operation-option-key))
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keys
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", ")
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") ")))
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(let ((mode-line mode-line-format))
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(prog1 (guix-operation-prompt-1 prompt keys)
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(setq mode-line-format mode-line)
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;; Clear the minibuffer after prompting.
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(message "")))))
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(defun guix-operation-prompt-1 (prompt keys)
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"This function is internal for `guix-operation-prompt'."
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(guix-operation-set-mode-line)
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(let ((key (read-char-choice prompt (cons ?\C-g keys) t)))
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(cl-case key
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(?y t)
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((?n ?\C-g) nil)
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(t (let* ((option (guix-operation-option-by-key key))
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(var (guix-operation-option-variable option)))
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(set var (not (symbol-value var)))
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(guix-operation-prompt-1 prompt keys))))))
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(defun guix-operation-set-mode-line ()
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"Display operation options in the mode-line of the current buffer."
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(setq mode-line-format
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(concat (propertize " Options: "
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'face 'mode-line-buffer-id)
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(mapconcat
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(lambda (option)
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(let ((key (guix-operation-option-key option))
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(name (guix-operation-option-name option))
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(val (guix-operation-option-string-value option)))
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(concat name
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" ("
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(propertize (string key)
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'face 'guix-operation-option-key)
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"): " val)))
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guix-operation-options
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guix-operation-option-separator)))
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(force-mode-line-update))
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(defun guix-package-source-path (package-id)
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"Return a store file path to a source of a package PACKAGE-ID."
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(message "Calculating the source derivation ...")
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(guix-eval-read
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(guix-make-guile-expression
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'package-source-path package-id)))
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(defvar guix-after-source-download-hook nil
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"Hook run after successful performing a 'source-download' operation.")
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(defun guix-package-source-build-derivation (package-id &optional prompt)
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"Build source derivation of a package PACKAGE-ID.
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Ask a user with PROMPT for continuing an operation."
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(when (or (not guix-operation-confirm)
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(guix-operation-prompt (or prompt
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"Build the source derivation?")))
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(guix-eval-in-repl
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(guix-make-guile-expression
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'package-source-build-derivation
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package-id
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:use-substitutes? (or guix-use-substitutes 'f)
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:dry-run? (or guix-dry-run 'f))
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nil 'source-download)))
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;;;###autoload
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(defun guix-apply-manifest (profile file &optional operation-buffer)
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"Apply manifest from FILE to PROFILE.
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This function has the same meaning as 'guix package --manifest' command.
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See Info node `(guix) Invoking guix package' for details.
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Interactively, use the current profile and prompt for manifest
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FILE. With a prefix argument, also prompt for PROFILE."
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(interactive
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(let* ((current-profile (guix-ui-current-profile))
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(profile (if current-prefix-arg
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(guix-profile-prompt)
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(or current-profile guix-current-profile)))
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(file (read-file-name "File with manifest: "))
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(buffer (and current-profile (current-buffer))))
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(list profile file buffer)))
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(when (or (not guix-operation-confirm)
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(y-or-n-p (format "Apply manifest from '%s' to profile '%s'? "
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file profile)))
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(guix-eval-in-repl
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(guix-make-guile-expression
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'guix-command
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"package"
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(concat "--profile=" (expand-file-name profile))
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(concat "--manifest=" (expand-file-name file)))
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operation-buffer)))
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;;; Executing guix commands
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(defcustom guix-run-in-shell-function #'guix-run-in-shell
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"Function used to run guix command.
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The function is called with a single argument - a command line string."
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:type '(choice (function-item guix-run-in-shell)
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(function-item guix-run-in-eshell)
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(function :tag "Other function"))
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:group 'guix)
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(defcustom guix-shell-buffer-name "*shell*"
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"Default name of a shell buffer used for running guix commands."
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:type 'string
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:group 'guix)
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(declare-function comint-send-input "comint" t)
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(defun guix-run-in-shell (string)
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"Run command line STRING in `guix-shell-buffer-name' buffer."
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(shell guix-shell-buffer-name)
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(goto-char (point-max))
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(insert string)
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(comint-send-input))
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(declare-function eshell-send-input "esh-mode" t)
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(defun guix-run-in-eshell (string)
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"Run command line STRING in eshell buffer."
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(eshell)
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(goto-char (point-max))
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(insert string)
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(eshell-send-input))
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(defun guix-run-command-in-shell (args)
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"Execute 'guix ARGS ...' command in a shell buffer."
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(funcall guix-run-in-shell-function
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(guix-command-string args)))
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(defun guix-run-command-in-repl (args)
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"Execute 'guix ARGS ...' command in Guix REPL."
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(guix-eval-in-repl
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(apply #'guix-make-guile-expression
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'guix-command args)))
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(defun guix-command-output (args)
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"Return string with 'guix ARGS ...' output."
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(cl-multiple-value-bind (output error)
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(guix-eval (apply #'guix-make-guile-expression
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'guix-command-output args))
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;; Remove trailing new space from the error string.
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(message (replace-regexp-in-string "\n\\'" "" (read error)))
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(read output)))
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(defun guix-help-string (&optional commands)
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"Return string with 'guix COMMANDS ... --help' output."
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(guix-eval-read
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(apply #'guix-make-guile-expression
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'help-string commands)))
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;;; Pull
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(defcustom guix-update-after-pull t
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"If non-nil, update Guix buffers after performing \\[guix-pull]."
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:type 'boolean
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:group 'guix)
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(defvar guix-after-pull-hook
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'(guix-restart-repl-after-pull guix-update-buffers-maybe-after-pull)
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"Hook run after successful performing `guix-pull' operation.")
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(defun guix-restart-repl-after-pull ()
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"Restart Guix REPL after `guix-pull' operation."
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(guix-repl-exit)
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(guix-start-process-maybe
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"Restarting Guix REPL after pull operation ..."))
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(defun guix-update-buffers-maybe-after-pull ()
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"Update buffers depending on `guix-update-after-pull'."
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(when guix-update-after-pull
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(mapc #'guix-ui-update-buffer
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;; No need to update "generation" buffers.
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(guix-ui-buffers '(guix-package-list-mode
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guix-package-info-mode
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guix-output-list-mode
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guix-output-info-mode)))
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(message "Guix buffers have been updated.")))
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;;;###autoload
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(defun guix-pull (&optional verbose)
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"Run Guix pull operation.
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If VERBOSE is non-nil (with prefix argument), produce verbose output."
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(interactive "P")
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(let ((args (and verbose '("--verbose"))))
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(guix-eval-in-repl
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(apply #'guix-make-guile-expression
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'guix-command "pull" args)
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nil 'pull)))
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(provide 'guix-base)
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;;; guix-base.el ends here
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