guix-devel/emacs/guix-info.el

605 lines
22 KiB
EmacsLisp
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

;;; guix-info.el --- Info buffers for displaying entries
;; Copyright © 2014 Alex Kost <alezost@gmail.com>
;; This file is part of GNU Guix.
;; GNU Guix is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Guix is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; This file provides a help-like buffer for displaying information
;; about Guix packages and generations.
;;; Code:
(require 'guix-history)
(require 'guix-base)
(require 'guix-utils)
(defgroup guix-info nil
"General settings for info buffers."
:prefix "guix-info-"
:group 'guix)
(defface guix-info-param-title
'((t :inherit font-lock-type-face))
"Face used for titles of parameters."
:group 'guix-info)
(defface guix-info-file-path
'((t :inherit link))
"Face used for file paths."
:group 'guix-info)
(defface guix-info-url
'((t :inherit link))
"Face used for URLs."
:group 'guix-info)
(defface guix-info-time
'((t :inherit font-lock-constant-face))
"Face used for timestamps."
:group 'guix-info)
(defface guix-info-action-button
'((((type x w32 ns) (class color))
:box (:line-width 2 :style released-button)
:background "lightgrey" :foreground "black")
(t :inherit button))
"Face used for action buttons."
:group 'guix-info)
(defface guix-info-action-button-mouse
'((((type x w32 ns) (class color))
:box (:line-width 2 :style released-button)
:background "grey90" :foreground "black")
(t :inherit highlight))
"Mouse face used for action buttons."
:group 'guix-info)
(defcustom guix-info-ignore-empty-vals nil
"If non-nil, do not display parameters with nil values."
:type 'boolean
:group 'guix-info)
(defvar guix-info-param-title-format "%-18s: "
"String used to format a title of a parameter.
It should be a '%s'-sequence. After inserting a title formatted
with this string, a value of the parameter is inserted.
This string is used by `guix-info-insert-title-default'.")
(defvar guix-info-multiline-prefix (make-string 20 ?\s)
"String used to format multi-line parameter values.
If a value occupies more than one line, this string is inserted
in the beginning of each line after the first one.
This string is used by `guix-info-insert-val-default'.")
(defvar guix-info-indent 2
"Number of spaces used to indent various parts of inserted text.")
(defvar guix-info-fill-column 60
"Column used for filling (word wrapping) parameters with long lines.
If a value is not multi-line and it occupies more than this
number of characters, it will be split into several lines.")
(defvar guix-info-delimiter "\n\f\n"
"String used to separate entries.")
(defvar guix-info-insert-methods
'((package
(name guix-package-info-name)
(version guix-package-info-version)
(license guix-package-info-license)
(synopsis guix-package-info-synopsis)
(description guix-package-info-insert-description
guix-info-insert-title-simple)
(outputs guix-package-info-insert-outputs
guix-info-insert-title-simple)
(home-url guix-info-insert-url)
(inputs guix-package-info-insert-inputs)
(native-inputs guix-package-info-insert-native-inputs)
(propagated-inputs guix-package-info-insert-propagated-inputs)
(location guix-package-info-insert-location))
(installed
(path guix-package-info-insert-output-path
guix-info-insert-title-simple)
(dependencies guix-package-info-insert-output-dependencies
guix-info-insert-title-simple))
(output
(name guix-package-info-name)
(version guix-output-info-insert-version)
(output guix-output-info-insert-output)
(path guix-package-info-insert-output-path
guix-info-insert-title-simple)
(dependencies guix-package-info-insert-output-dependencies
guix-info-insert-title-simple)
(license guix-package-info-license)
(synopsis guix-package-info-synopsis)
(description guix-package-info-insert-description
guix-info-insert-title-simple)
(home-url guix-info-insert-url)
(inputs guix-package-info-insert-inputs)
(native-inputs guix-package-info-insert-native-inputs)
(propagated-inputs guix-package-info-insert-propagated-inputs)
(location guix-package-info-insert-location))
(generation
(number guix-generation-info-insert-number)
(path guix-info-insert-file-path)
(time guix-info-insert-time)))
"Methods for inserting parameter values.
Each element of the list should have a form:
(ENTRY-TYPE . ((PARAM INSERT-VALUE [INSERT-TITLE]) ...))
INSERT-VALUE may be either nil, a face name or a function. If it
is nil or a face, `guix-info-insert-val-default' function is
called with parameter value and INSERT-VALUE as arguments. If it
is a function, this function is called with parameter value and
entry info (alist of parameters and their values) as arguments.
INSERT-TITLE may be either nil, a face name or a function. If it
is nil or a face, `guix-info-insert-title-default' function is
called with parameter title and INSERT-TITLE as arguments. If it
is a function, this function is called with parameter title as
argument.")
(defvar guix-info-displayed-params
'((package name version synopsis outputs location home-url
license inputs native-inputs propagated-inputs description)
(output name version output synopsis path dependencies location home-url
license inputs native-inputs propagated-inputs description)
(installed path dependencies)
(generation number prev-number time path))
"List of displayed entry parameters.
Each element of the list should have a form:
(ENTRY-TYPE . (PARAM ...))
The order of displayed parameters is the same as in this list.")
(defun guix-info-get-insert-methods (entry-type param)
"Return list of insert methods for parameter PARAM of ENTRY-TYPE.
See `guix-info-insert-methods' for details."
(guix-get-key-val guix-info-insert-methods
entry-type param))
(defun guix-info-get-displayed-params (entry-type)
"Return parameters of ENTRY-TYPE that should be displayed."
(guix-get-key-val guix-info-displayed-params
entry-type))
(defun guix-info-get-indent (&optional level)
"Return `guix-info-indent' \"multiplied\" by LEVEL spaces.
LEVEL is 1 by default."
(make-string (* guix-info-indent (or level 1)) ?\s))
(defun guix-info-insert-indent (&optional level)
"Insert `guix-info-indent' spaces LEVEL times (1 by default)."
(insert (guix-info-get-indent level)))
(defun guix-info-insert-entries (entries entry-type)
"Display ENTRIES of ENTRY-TYPE in the current info buffer.
ENTRIES should have a form of `guix-entries'."
(guix-mapinsert (lambda (entry)
(guix-info-insert-entry entry entry-type))
entries
guix-info-delimiter))
(defun guix-info-insert-entry (entry entry-type &optional indent-level)
"Insert ENTRY of ENTRY-TYPE into the current info buffer.
If INDENT-LEVEL is non-nil, indent displayed information by this
number of `guix-info-indent' spaces."
(let ((region-beg (point)))
(mapc (lambda (param)
(guix-info-insert-param param entry entry-type))
(guix-info-get-displayed-params entry-type))
(when indent-level
(indent-rigidly region-beg (point)
(* indent-level guix-info-indent)))))
(defun guix-info-insert-param (param entry entry-type)
"Insert title and value of a PARAM at point.
ENTRY is alist with parameters and their values.
ENTRY-TYPE is a type of ENTRY."
(let ((val (guix-get-key-val entry param)))
(unless (and guix-info-ignore-empty-vals (null val))
(let* ((title (guix-get-param-title entry-type param))
(insert-methods (guix-info-get-insert-methods entry-type param))
(val-method (car insert-methods))
(title-method (cadr insert-methods)))
(guix-info-method-funcall title title-method
#'guix-info-insert-title-default)
(guix-info-method-funcall val val-method
#'guix-info-insert-val-default
entry)
(insert "\n")))))
(defun guix-info-method-funcall (val method default-fun &rest args)
"Call METHOD or DEFAULT-FUN.
If METHOD is a function and VAL is non-nil, call this
function by applying it to VAL and ARGS.
If METHOD is a face, propertize inserted VAL with this face."
(cond ((or (null method)
(facep method))
(funcall default-fun val method))
((functionp method)
(apply method val args))
(t (error "Unknown method '%S'" method))))
(defun guix-info-insert-title-default (title &optional face format)
"Insert TITLE formatted with `guix-info-param-title-format' at point."
(guix-format-insert title
(or face 'guix-info-param-title)
(or format guix-info-param-title-format)))
(defun guix-info-insert-title-simple (title &optional face)
"Insert TITLE at point."
(guix-info-insert-title-default title face "%s:"))
(defun guix-info-insert-val-default (val &optional face)
"Format and insert parameter value VAL at point.
This function is intended to be called after
`guix-info-insert-title-default'.
If VAL is a one-line string longer than `guix-info-fill-column',
split it into several short lines. See also
`guix-info-multiline-prefix'.
If FACE is non-nil, propertize inserted line(s) with this FACE."
(guix-split-insert val face
guix-info-fill-column
(concat "\n" guix-info-multiline-prefix)))
(defun guix-info-insert-val-simple (val &optional face-or-fun)
"Format and insert parameter value VAL at point.
This function is intended to be called after
`guix-info-insert-title-simple'.
If VAL is a one-line string longer than `guix-info-fill-column',
split it into several short lines and indent each line with
`guix-info-indent' spaces.
If FACE-OR-FUN is a face, propertize inserted line(s) with this FACE.
If FACE-OR-FUN is a function, call it with VAL as argument. If
VAL is a list, call the function on each element of this list."
(if (null val)
(progn (guix-info-insert-indent)
(guix-format-insert nil))
(let ((prefix (concat "\n" (guix-info-get-indent))))
(insert prefix)
(if (functionp face-or-fun)
(guix-mapinsert face-or-fun
(if (listp val) val (list val))
prefix)
(guix-split-insert val face-or-fun
guix-info-fill-column prefix)))))
(defun guix-info-insert-action-button (label action &optional message
&rest properties)
"Make action button with LABEL and insert it at point.
For the meaning of ACTION, MESSAGE and PROPERTIES, see
`guix-insert-button'."
(apply #'guix-insert-button
label 'guix-info-action-button action message
'mouse-face 'guix-info-action-button-mouse
properties))
(defun guix-info-insert-file-path (path &optional _)
"Make button from file PATH and insert it at point."
(guix-insert-button
path 'guix-info-file-path
(lambda (btn) (find-file (button-label btn)))
"Find file"))
(defun guix-info-insert-url (url &optional _)
"Make button from URL and insert it at point."
(guix-insert-button
url 'guix-info-url
(lambda (btn) (browse-url (button-label btn)))
"Browse URL"))
(defun guix-info-insert-time (seconds &optional _)
"Insert formatted time string using SECONDS at point."
(guix-info-insert-val-default (guix-get-time-string seconds)
'guix-info-time))
(defvar guix-info-mode-map
(let ((map (make-sparse-keymap)))
(set-keymap-parent
map (make-composed-keymap button-buffer-map
special-mode-map))
map)
"Parent keymap for info buffers.")
(define-derived-mode guix-info-mode special-mode "Guix-Info"
"Parent mode for displaying information in info buffers.")
;;; Displaying packages
(guix-define-buffer-type info package
:required (id installed non-unique))
(defface guix-package-info-name
'((t :inherit font-lock-keyword-face))
"Face used for a name of a package."
:group 'guix-package-info)
(defface guix-package-info-version
'((t :inherit font-lock-builtin-face))
"Face used for a version of a package."
:group 'guix-package-info)
(defface guix-package-info-synopsis
'((t :inherit font-lock-doc-face))
"Face used for a synopsis of a package."
:group 'guix-package-info)
(defface guix-package-info-description
'((t))
"Face used for a description of a package."
:group 'guix-package-info)
(defface guix-package-info-license
'((t :inherit font-lock-string-face))
"Face used for a license of a package."
:group 'guix-package-info)
(defface guix-package-info-location
'((t :inherit link))
"Face used for a location of a package."
:group 'guix-package-info)
(defface guix-package-info-installed-outputs
'((default :weight bold)
(((class color) (min-colors 88) (background light))
:foreground "ForestGreen")
(((class color) (min-colors 88) (background dark))
:foreground "PaleGreen")
(((class color) (min-colors 8))
:foreground "green")
(t :underline t))
"Face used for installed outputs of a package."
:group 'guix-package-info)
(defface guix-package-info-uninstalled-outputs
'((t :weight bold))
"Face used for uninstalled outputs of a package."
:group 'guix-package-info)
(defface guix-package-info-obsolete
'((t :inherit error))
"Face used if a package is obsolete."
:group 'guix-package-info)
(defun guix-package-info-insert-description (desc &optional _)
"Insert description DESC at point."
(guix-info-insert-val-simple desc 'guix-package-info-description))
(defun guix-package-info-insert-location (location &optional _)
"Make button from file LOCATION and insert it at point."
(guix-insert-button
location 'guix-package-info-location
(lambda (btn) (guix-find-location (button-label btn)))
"Find location of this package"))
(defmacro guix-package-info-define-insert-inputs (&optional type)
"Define a face and a function for inserting package inputs.
TYPE is a type of inputs.
Function name is `guix-package-info-insert-TYPE-inputs'.
Face name is `guix-package-info-TYPE-inputs'."
(let* ((type-str (symbol-name type))
(type-name (and type (concat type-str "-")))
(type-desc (and type (concat type-str " ")))
(face (intern (concat "guix-package-info-" type-name "inputs")))
(fun (intern (concat "guix-package-info-insert-" type-name "inputs"))))
`(progn
(defface ,face
'((t :inherit button))
,(concat "Face used for " type-desc "inputs of a package.")
:group 'guix-package-info)
(defun ,fun (inputs &optional _)
,(concat "Make buttons from " type-desc "INPUTS and insert them at point.")
(guix-package-info-insert-full-names inputs ',face)))))
(guix-package-info-define-insert-inputs)
(guix-package-info-define-insert-inputs native)
(guix-package-info-define-insert-inputs propagated)
(defun guix-package-info-insert-full-names (names face)
"Make buttons from package NAMES and insert them at point.
NAMES is a list of strings.
Propertize buttons with FACE."
(if names
(guix-info-insert-val-default
(with-temp-buffer
(guix-mapinsert (lambda (name)
(guix-package-info-insert-full-name
name face))
names
guix-list-separator)
(buffer-substring (point-min) (point-max))))
(guix-format-insert nil)))
(defun guix-package-info-insert-full-name (name face)
"Make button and insert package NAME at point.
Propertize package button with FACE."
(guix-insert-button
name face
(lambda (btn)
(guix-get-show-entries 'info 'package 'name
(button-label btn)))
"Describe this package"))
;;; Inserting outputs and installed parameters
(defvar guix-package-info-output-format "%-10s"
"String used to format output names of the packages.
It should be a '%s'-sequence. After inserting an output name
formatted with this string, an action button is inserted.")
(defvar guix-package-info-obsolete-string "(This package is obsolete)"
"String used if a package is obsolete.")
(defun guix-package-info-insert-outputs (outputs entry)
"Insert OUTPUTS from package ENTRY at point."
(and (guix-get-key-val entry 'obsolete)
(guix-package-info-insert-obsolete-text))
(and (guix-get-key-val entry 'non-unique)
(guix-get-key-val entry 'installed)
(guix-package-info-insert-non-unique-text
(guix-get-full-name entry)))
(insert "\n")
(mapc (lambda (output)
(guix-package-info-insert-output output entry))
outputs))
(defun guix-package-info-insert-obsolete-text ()
"Insert a message about obsolete package at point."
(guix-info-insert-indent)
(guix-format-insert guix-package-info-obsolete-string
'guix-package-info-obsolete))
(defun guix-package-info-insert-non-unique-text (full-name)
"Insert a message about non-unique package with FULL-NAME at point."
(insert "\n")
(guix-info-insert-indent)
(insert "Installed outputs are displayed for a non-unique ")
(guix-package-info-insert-full-name full-name
'guix-package-info-inputs)
(insert " package."))
(defun guix-package-info-insert-output (output entry)
"Insert OUTPUT at point.
Make some fancy text with buttons and additional stuff if the
current OUTPUT is installed (if there is such output in
`installed' parameter of a package ENTRY)."
(let* ((installed (guix-get-key-val entry 'installed))
(obsolete (guix-get-key-val entry 'obsolete))
(installed-entry (cl-find-if
(lambda (entry)
(string= (guix-get-key-val entry 'output)
output))
installed))
(action-type (if installed-entry 'delete 'install)))
(guix-info-insert-indent)
(guix-format-insert output
(if installed-entry
'guix-package-info-installed-outputs
'guix-package-info-uninstalled-outputs)
guix-package-info-output-format)
(guix-package-info-insert-action-button action-type entry output)
(when obsolete
(guix-info-insert-indent)
(guix-package-info-insert-action-button 'upgrade entry output))
(insert "\n")
(when installed-entry
(guix-info-insert-entry installed-entry 'installed 2))))
(defun guix-package-info-insert-action-button (type entry output)
"Insert button to process an action on a package OUTPUT at point.
TYPE is one of the following symbols: `install', `delete', `upgrade'.
ENTRY is an alist with package info."
(let ((type-str (capitalize (symbol-name type)))
(full-name (guix-get-full-name entry output)))
(guix-info-insert-action-button
type-str
(lambda (btn)
(guix-process-package-actions
(list (button-get btn 'action-type)
(list (button-get btn 'id)
(button-get btn 'output)))))
(concat type-str " '" full-name "'")
'action-type type
'id (or (guix-get-key-val entry 'package-id)
(guix-get-key-val entry 'id))
'output output)))
(defun guix-package-info-insert-output-path (path &optional _)
"Insert PATH of the installed output."
(guix-info-insert-val-simple path #'guix-info-insert-file-path))
(defalias 'guix-package-info-insert-output-dependencies
'guix-package-info-insert-output-path)
;;; Displaying outputs
(guix-define-buffer-type info output
:buffer-name "*Guix Package Info*"
:required (id package-id installed non-unique))
(defun guix-output-info-insert-version (version entry)
"Insert output VERSION and obsolete text if needed at point."
(guix-info-insert-val-default version
'guix-package-info-version)
(and (guix-get-key-val entry 'obsolete)
(guix-package-info-insert-obsolete-text)))
(defun guix-output-info-insert-output (output entry)
"Insert OUTPUT and action buttons at point."
(let* ((installed (guix-get-key-val entry 'installed))
(obsolete (guix-get-key-val entry 'obsolete))
(action-type (if installed 'delete 'install)))
(guix-info-insert-val-default
output
(if installed
'guix-package-info-installed-outputs
'guix-package-info-uninstalled-outputs))
(guix-info-insert-indent)
(guix-package-info-insert-action-button action-type entry output)
(when obsolete
(guix-info-insert-indent)
(guix-package-info-insert-action-button 'upgrade entry output))))
;;; Displaying generations
(guix-define-buffer-type info generation)
(defface guix-generation-info-number
'((t :inherit font-lock-keyword-face))
"Face used for a number of a generation."
:group 'guix-generation-info)
(defun guix-generation-info-insert-number (number &optional _)
"Insert generation NUMBER and action buttons."
(guix-info-insert-val-default number 'guix-generation-info-number)
(guix-info-insert-indent)
(guix-info-insert-action-button
"Packages"
(lambda (btn)
(guix-get-show-entries 'list 'package 'generation
(button-get btn 'number)))
"Show installed packages for this generation"
'number number)
(guix-info-insert-indent)
(guix-info-insert-action-button
"Delete"
(lambda (btn) (error "Sorry, not implemented yet"))
"Delete this generation"))
(provide 'guix-info)
;;; guix-info.el ends here