guix/emacs/guix-base.el
Alex Kost 6c40b7b703 emacs: Generalize buffer interface.
Extract the code for defining buffer interface from "guix-base.el",
generalize it and move to "guix-buffer.el".

* emacs.am (ELFILES): Add "emacs/guix-buffer.el".
* emacs/guix-base.el (guix-profile, guix-entries, guix-buffer-type)
  (guix-entry-type, guix-search-type, guix-search-vals, guix-set-vars)
  (guix-get-symbol, guix-show-entries, guix-get-show-entries)
  (guix-set-buffer, guix-history-call, guix-make-history-item)
  (guix-get-params-for-receiving): Remove.
  (guix-switch-to-buffer): Rename to 'guix-buffer-display' and move to
  "guix-buffer.el".
  (guix-get-entries): Rename to 'guix-ui-get-entries' and move to
  "guix-ui.el".
  (guix-buffer-data, guix-buffer-value, guix-buffer-param-title)
  (guix-buffer-name, guix-buffer-history-size)
  (guix-buffer-revert-confirm?, guix-buffer-map, guix-buffer-revert)
  (guix-buffer-after-redisplay-hook, guix-buffer-redisplay)
  (guix-buffer-redisplay-goto-button): Move to...
* emacs/guix-buffer.el: ... here.  New file.
  (guix-buffer-item): New variable.
  (guix-buffer-with-item, guix-buffer-with-current-item)
  (guix-buffer-define-current-item-accessor)
  (guix-buffer-define-current-item-accessors)
  (guix-buffer-define-current-args-accessor)
  (guix-buffer-define-current-args-accessors): New macros.
  (guix-buffer-get-entries, guix-buffer-mode-enable)
  (guix-buffer-mode-initialize, guix-buffer-insert-entries)
  (guix-buffer-show-entries-default, guix-buffer-show-entries)
  (guix-buffer-message, guix-buffer-history-item, guix-buffer-set)
  (guix-buffer-display-entries-current)
  (guix-buffer-get-display-entries-current)
  (guix-buffer-display-entries, guix-buffer-get-display-entries): New
  procedures.
* emacs/guix-info.el: Adjust for the procedures renaming.
  (guix-info-define-interface): Add ':show-entries-function' keyword.
* emacs/guix-list.el: Likewise.
* emacs/guix-ui.el (guix-ui-define-interface): Generate
  'guix-ENTRY-TYPE-BUFFER-TYPE-get-entries' procedure based on
  'guix-ui-get-entries'.
* emacs/guix.el (guix-get-show-packages, guix-get-show-generations):
  Adjust for the procedures renaming.
2016-01-02 17:25:35 +03:00

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;;; guix-base.el --- Common definitions -*- lexical-binding: t -*-
;; Copyright © 2014, 2015 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 some base and common definitions for guix.el
;; package.
;;; Code:
(require 'cl-lib)
(require 'guix-profiles)
(require 'guix-backend)
(require 'guix-entry)
(require 'guix-guile)
(require 'guix-utils)
(require 'guix-ui)
;;; Parameters of the entries
(defun guix-package-name-specification (name version &optional output)
"Return Guix package specification by its NAME, VERSION and OUTPUT."
(concat name "-" version
(when output (concat ":" output))))
(defun guix-package-entry->name-specification (entry &optional output)
"Return name specification of the package ENTRY and OUTPUT."
(guix-package-name-specification
(guix-entry-value entry 'name)
(guix-entry-value entry 'version)
(or output (guix-entry-value entry 'output))))
(defun guix-package-entries->name-specifications (entries)
"Return name specifications by the package or output ENTRIES."
(cl-remove-duplicates (mapcar #'guix-package-entry->name-specification
entries)
:test #'string=))
(defun guix-package-installed-outputs (entry)
"Return list of installed outputs for the package ENTRY."
(mapcar (lambda (installed-entry)
(guix-entry-value installed-entry 'output))
(guix-entry-value entry 'installed)))
(defun guix-package-id-and-output-by-output-id (oid)
"Return list (PACKAGE-ID OUTPUT) by output id OID."
(cl-multiple-value-bind (pid-str output)
(split-string oid ":")
(let ((pid (string-to-number pid-str)))
(list (if (= 0 pid) pid-str pid)
output))))
;;; Location of the packages
(defvar guix-directory nil
"Default Guix directory.
If it is not set by a user, it is set after starting Guile REPL.
This directory is used to define location of the packages.")
(defun guix-set-directory ()
"Set `guix-directory' if needed."
(or guix-directory
(setq guix-directory
(guix-eval-read "%guix-dir"))))
(add-hook 'guix-after-start-repl-hook 'guix-set-directory)
(defun guix-find-location (location)
"Go to LOCATION of a package.
LOCATION is a string of the form:
\"PATH:LINE:COLUMN\"
If PATH is relative, it is considered to be relative to
`guix-directory'."
(cl-multiple-value-bind (path line col)
(split-string location ":")
(let ((file (expand-file-name path guix-directory))
(line (string-to-number line))
(col (string-to-number col)))
(find-file file)
(goto-char (point-min))
(forward-line (- line 1))
(move-to-column col)
(recenter 1))))
(defun guix-package-location (id-or-name)
"Return location of a package with ID-OR-NAME.
For the meaning of location, see `guix-find-location'."
(guix-eval-read (guix-make-guile-expression
'package-location-string id-or-name)))
;;; Receivable lists of packages, lint checkers, etc.
(guix-memoized-defun guix-graph-type-names ()
"Return a list of names of available graph node types."
(guix-eval-read (guix-make-guile-expression 'graph-type-names)))
(guix-memoized-defun guix-refresh-updater-names ()
"Return a list of names of available refresh updater types."
(guix-eval-read (guix-make-guile-expression 'refresh-updater-names)))
(guix-memoized-defun guix-lint-checker-names ()
"Return a list of names of available lint checkers."
(guix-eval-read (guix-make-guile-expression 'lint-checker-names)))
(guix-memoized-defun guix-package-names ()
"Return a list of names of available packages."
(sort
;; Work around <https://github.com/jaor/geiser/issues/64>:
;; list of strings is parsed much slower than list of lists,
;; so we use 'package-names-lists' instead of 'package-names'.
;; (guix-eval-read (guix-make-guile-expression 'package-names))
(mapcar #'car
(guix-eval-read (guix-make-guile-expression
'package-names-lists)))
#'string<))
;;; Getting and displaying info about packages and generations
(defcustom guix-package-list-type 'output
"Define how to display packages in a list buffer.
May be a symbol `package' or `output' (if `output', display each
output on a separate line; if `package', display each package on
a separate line)."
:type '(choice (const :tag "List of packages" package)
(const :tag "List of outputs" output))
:group 'guix)
(defcustom guix-package-info-type 'package
"Define how to display packages in an info buffer.
May be a symbol `package' or `output' (if `output', display each
output separately; if `package', display outputs inside a package
information)."
:type '(choice (const :tag "Display packages" package)
(const :tag "Display outputs" output))
:group 'guix)
;;; Generations
(defcustom guix-generation-packages-buffer-name-function
#'guix-generation-packages-buffer-name-default
"Function used to define name of a buffer with generation packages.
This function is called with 2 arguments: PROFILE (string) and
GENERATION (number)."
:type '(choice (function-item guix-generation-packages-buffer-name-default)
(function-item guix-generation-packages-buffer-name-long)
(function :tag "Other function"))
:group 'guix)
(defcustom guix-generation-packages-update-buffer t
"If non-nil, always update list of packages during comparing generations.
If nil, generation packages are received only once. So when you
compare generation 1 and generation 2, the packages for both
generations will be received. Then if you compare generation 1
and generation 3, only the packages for generation 3 will be
received. Thus if you use comparing of different generations a
lot, you may set this variable to nil to improve the
performance."
:type 'boolean
:group 'guix)
(defvar guix-output-name-width 30
"Width of an output name \"column\".
This variable is used in auxiliary buffers for comparing generations.")
(defun guix-generation-file (profile generation)
"Return the file name of a PROFILE's GENERATION."
(format "%s-%s-link" profile generation))
(defun guix-manifest-file (profile &optional generation)
"Return the file name of a PROFILE's manifest.
If GENERATION number is specified, return manifest file name for
this generation."
(expand-file-name "manifest"
(if generation
(guix-generation-file profile generation)
profile)))
(defun guix-generation-packages (profile generation)
"Return a list of sorted packages installed in PROFILE's GENERATION.
Each element of the list is a list of the package specification and its path."
(let ((names+paths (guix-eval-read
(guix-make-guile-expression
'generation-package-specifications+paths
profile generation))))
(sort names+paths
(lambda (a b)
(string< (car a) (car b))))))
(defun guix-generation-packages-buffer-name-default (profile generation)
"Return name of a buffer for displaying GENERATION's package outputs.
Use base name of PROFILE path."
(let ((profile-name (file-name-base (directory-file-name profile))))
(format "*Guix %s: generation %s*"
profile-name generation)))
(defun guix-generation-packages-buffer-name-long (profile generation)
"Return name of a buffer for displaying GENERATION's package outputs.
Use the full PROFILE path."
(format "*Guix generation %s (%s)*"
generation profile))
(defun guix-generation-packages-buffer-name (profile generation)
"Return name of a buffer for displaying GENERATION's package outputs."
(let ((fun (if (functionp guix-generation-packages-buffer-name-function)
guix-generation-packages-buffer-name-function
#'guix-generation-packages-buffer-name-default)))
(funcall fun profile generation)))
(defun guix-generation-insert-package (name path)
"Insert package output NAME and PATH at point."
(insert name)
(indent-to guix-output-name-width 2)
(insert path "\n"))
(defun guix-generation-insert-packages (buffer profile generation)
"Insert package outputs installed in PROFILE's GENERATION in BUFFER."
(with-current-buffer buffer
(setq buffer-read-only nil
indent-tabs-mode nil)
(erase-buffer)
(mapc (lambda (name+path)
(guix-generation-insert-package
(car name+path) (cadr name+path)))
(guix-generation-packages profile generation))))
(defun guix-generation-packages-buffer (profile generation)
"Return buffer with package outputs installed in PROFILE's GENERATION.
Create the buffer if needed."
(let ((buf-name (guix-generation-packages-buffer-name
profile generation)))
(or (and (null guix-generation-packages-update-buffer)
(get-buffer buf-name))
(let ((buf (get-buffer-create buf-name)))
(guix-generation-insert-packages buf profile generation)
buf))))
(defun guix-profile-generation-manifest-file (generation)
"Return the file name of a GENERATION's manifest.
GENERATION is a generation number of the current profile."
(guix-manifest-file (guix-ui-current-profile) generation))
(defun guix-profile-generation-packages-buffer (generation)
"Insert GENERATION's package outputs in a buffer and return it.
GENERATION is a generation number of the current profile."
(guix-generation-packages-buffer (guix-ui-current-profile)
generation))
;;; Actions on packages and generations
(defface guix-operation-option-key
'((t :inherit font-lock-warning-face))
"Face used for the keys of operation options."
:group 'guix-faces)
(defcustom guix-operation-confirm t
"If nil, do not prompt to confirm an operation."
:type 'boolean
:group 'guix)
(defcustom guix-use-substitutes t
"If non-nil, use substitutes for the Guix packages."
:type 'boolean
:group 'guix)
(defvar guix-dry-run nil
"If non-nil, do not perform the real actions, just simulate.")
(defvar guix-temp-buffer-name " *Guix temp*"
"Name of a buffer used for displaying info before executing operation.")
(defvar guix-operation-option-true-string "yes"
"String displayed in the mode-line when operation option is t.")
(defvar guix-operation-option-false-string "no "
"String displayed in the mode-line when operation option is nil.")
(defvar guix-operation-option-separator " | "
"String used in the mode-line to separate operation options.")
(defvar guix-operation-options
'((?s "substitutes" guix-use-substitutes)
(?d "dry-run" guix-dry-run))
"List of available operation options.
Each element of the list has a form:
(KEY NAME VARIABLE)
KEY is a character that may be pressed during confirmation to
toggle the option.
NAME is a string displayed in the mode-line.
VARIABLE is a name of an option variable.")
(defun guix-operation-option-by-key (key)
"Return operation option by KEY (character)."
(assq key guix-operation-options))
(defun guix-operation-option-key (option)
"Return key (character) of the operation OPTION."
(car option))
(defun guix-operation-option-name (option)
"Return name of the operation OPTION."
(nth 1 option))
(defun guix-operation-option-variable (option)
"Return name of the variable of the operation OPTION."
(nth 2 option))
(defun guix-operation-option-value (option)
"Return boolean value of the operation OPTION."
(symbol-value (guix-operation-option-variable option)))
(defun guix-operation-option-string-value (option)
"Convert boolean value of the operation OPTION to string and return it."
(if (guix-operation-option-value option)
guix-operation-option-true-string
guix-operation-option-false-string))
(defun guix-process-package-actions (profile actions
&optional operation-buffer)
"Process package ACTIONS on PROFILE.
Each action is a list of the form:
(ACTION-TYPE PACKAGE-SPEC ...)
ACTION-TYPE is one of the following symbols: `install',
`upgrade', `remove'/`delete'.
PACKAGE-SPEC should have the following form: (ID [OUTPUT] ...)."
(let (install upgrade remove)
(mapc (lambda (action)
(let ((action-type (car action))
(specs (cdr action)))
(cl-case action-type
(install (setq install (append install specs)))
(upgrade (setq upgrade (append upgrade specs)))
((remove delete) (setq remove (append remove specs))))))
actions)
(when (guix-continue-package-operation-p
profile
:install install :upgrade upgrade :remove remove)
(guix-eval-in-repl
(guix-make-guile-expression
'process-package-actions profile
:install install :upgrade upgrade :remove remove
:use-substitutes? (or guix-use-substitutes 'f)
:dry-run? (or guix-dry-run 'f))
(and (not guix-dry-run) operation-buffer)))))
(cl-defun guix-continue-package-operation-p (profile
&key install upgrade remove)
"Return non-nil if a package operation should be continued.
Ask a user if needed (see `guix-operation-confirm').
INSTALL, UPGRADE, REMOVE are 'package action specifications'.
See `guix-process-package-actions' for details."
(or (null guix-operation-confirm)
(let* ((entries (guix-ui-get-entries
profile 'package 'id
(append (mapcar #'car install)
(mapcar #'car upgrade)
(mapcar #'car remove))
'(id name version location)))
(install-strings (guix-get-package-strings install entries))
(upgrade-strings (guix-get-package-strings upgrade entries))
(remove-strings (guix-get-package-strings remove entries)))
(if (or install-strings upgrade-strings remove-strings)
(let ((buf (get-buffer-create guix-temp-buffer-name)))
(with-current-buffer buf
(setq-local cursor-type nil)
(setq buffer-read-only nil)
(erase-buffer)
(insert "Profile: " profile "\n\n")
(guix-insert-package-strings install-strings "install")
(guix-insert-package-strings upgrade-strings "upgrade")
(guix-insert-package-strings remove-strings "remove")
(let ((win (temp-buffer-window-show
buf
'((display-buffer-reuse-window
display-buffer-at-bottom)
(window-height . fit-window-to-buffer)))))
(prog1 (guix-operation-prompt)
(quit-window nil win)))))
(message "Nothing to be done. If the REPL was restarted, information is not up-to-date.")
nil))))
(defun guix-get-package-strings (specs entries)
"Return short package descriptions for performing package actions.
See `guix-process-package-actions' for the meaning of SPECS.
ENTRIES is a list of package entries to get info about packages."
(delq nil
(mapcar
(lambda (spec)
(let* ((id (car spec))
(outputs (cdr spec))
(entry (guix-entry-by-id id entries)))
(when entry
(let ((location (guix-entry-value entry 'location)))
(concat (guix-package-entry->name-specification entry)
(when outputs
(concat ":"
(guix-concat-strings outputs ",")))
(when location
(concat "\t(" location ")")))))))
specs)))
(defun guix-insert-package-strings (strings action)
"Insert information STRINGS at point for performing package ACTION."
(when strings
(insert "Package(s) to " (propertize action 'face 'bold) ":\n")
(mapc (lambda (str)
(insert " " str "\n"))
strings)
(insert "\n")))
(defun guix-operation-prompt (&optional prompt)
"Prompt a user for continuing the current operation.
Return non-nil, if the operation should be continued; nil otherwise.
Ask a user with PROMPT for continuing an operation."
(let* ((option-keys (mapcar #'guix-operation-option-key
guix-operation-options))
(keys (append '(?y ?n) option-keys))
(prompt (concat (propertize (or prompt "Continue operation?")
'face 'minibuffer-prompt)
" ("
(mapconcat
(lambda (key)
(propertize (string key)
'face 'guix-operation-option-key))
keys
", ")
") ")))
(let ((mode-line mode-line-format))
(prog1 (guix-operation-prompt-1 prompt keys)
(setq mode-line-format mode-line)
;; Clear the minibuffer after prompting.
(message "")))))
(defun guix-operation-prompt-1 (prompt keys)
"This function is internal for `guix-operation-prompt'."
(guix-operation-set-mode-line)
(let ((key (read-char-choice prompt (cons ?\C-g keys) t)))
(cl-case key
(?y t)
((?n ?\C-g) nil)
(t (let* ((option (guix-operation-option-by-key key))
(var (guix-operation-option-variable option)))
(set var (not (symbol-value var)))
(guix-operation-prompt-1 prompt keys))))))
(defun guix-operation-set-mode-line ()
"Display operation options in the mode-line of the current buffer."
(setq mode-line-format
(concat (propertize " Options: "
'face 'mode-line-buffer-id)
(mapconcat
(lambda (option)
(let ((key (guix-operation-option-key option))
(name (guix-operation-option-name option))
(val (guix-operation-option-string-value option)))
(concat name
" ("
(propertize (string key)
'face 'guix-operation-option-key)
"): " val)))
guix-operation-options
guix-operation-option-separator)))
(force-mode-line-update))
(defun guix-delete-generations (profile generations
&optional operation-buffer)
"Delete GENERATIONS from PROFILE.
Each element from GENERATIONS is a generation number."
(when (or (not guix-operation-confirm)
(y-or-n-p
(let ((count (length generations)))
(if (> count 1)
(format "Delete %d generations from profile '%s'? "
count profile)
(format "Delete generation %d from profile '%s'? "
(car generations) profile)))))
(guix-eval-in-repl
(guix-make-guile-expression
'delete-generations* profile generations)
operation-buffer)))
(defun guix-switch-to-generation (profile generation
&optional operation-buffer)
"Switch PROFILE to GENERATION."
(when (or (not guix-operation-confirm)
(y-or-n-p (format "Switch profile '%s' to generation %d? "
profile generation)))
(guix-eval-in-repl
(guix-make-guile-expression
'switch-to-generation* profile generation)
operation-buffer)))
(defun guix-package-source-path (package-id)
"Return a store file path to a source of a package PACKAGE-ID."
(message "Calculating the source derivation ...")
(guix-eval-read
(guix-make-guile-expression
'package-source-path package-id)))
(defvar guix-after-source-download-hook nil
"Hook run after successful performing a 'source-download' operation.")
(defun guix-package-source-build-derivation (package-id &optional prompt)
"Build source derivation of a package PACKAGE-ID.
Ask a user with PROMPT for continuing an operation."
(when (or (not guix-operation-confirm)
(guix-operation-prompt (or prompt
"Build the source derivation?")))
(guix-eval-in-repl
(guix-make-guile-expression
'package-source-build-derivation
package-id
:use-substitutes? (or guix-use-substitutes 'f)
:dry-run? (or guix-dry-run 'f))
nil 'source-download)))
;;;###autoload
(defun guix-apply-manifest (profile file &optional operation-buffer)
"Apply manifest from FILE to PROFILE.
This function has the same meaning as 'guix package --manifest' command.
See Info node `(guix) Invoking guix package' for details.
Interactively, use the current profile and prompt for manifest
FILE. With a prefix argument, also prompt for PROFILE."
(interactive
(let* ((current-profile (guix-ui-current-profile))
(profile (if current-prefix-arg
(guix-profile-prompt)
(or current-profile guix-current-profile)))
(file (read-file-name "File with manifest: "))
(buffer (and current-profile (current-buffer))))
(list profile file buffer)))
(when (or (not guix-operation-confirm)
(y-or-n-p (format "Apply manifest from '%s' to profile '%s'? "
file profile)))
(guix-eval-in-repl
(guix-make-guile-expression
'guix-command
"package"
(concat "--profile=" (expand-file-name profile))
(concat "--manifest=" (expand-file-name file)))
operation-buffer)))
;;; Executing guix commands
(defcustom guix-run-in-shell-function #'guix-run-in-shell
"Function used to run guix command.
The function is called with a single argument - a command line string."
:type '(choice (function-item guix-run-in-shell)
(function-item guix-run-in-eshell)
(function :tag "Other function"))
:group 'guix)
(defcustom guix-shell-buffer-name "*shell*"
"Default name of a shell buffer used for running guix commands."
:type 'string
:group 'guix)
(declare-function comint-send-input "comint" t)
(defun guix-run-in-shell (string)
"Run command line STRING in `guix-shell-buffer-name' buffer."
(shell guix-shell-buffer-name)
(goto-char (point-max))
(insert string)
(comint-send-input))
(declare-function eshell-send-input "esh-mode" t)
(defun guix-run-in-eshell (string)
"Run command line STRING in eshell buffer."
(eshell)
(goto-char (point-max))
(insert string)
(eshell-send-input))
(defun guix-run-command-in-shell (args)
"Execute 'guix ARGS ...' command in a shell buffer."
(funcall guix-run-in-shell-function
(guix-command-string args)))
(defun guix-run-command-in-repl (args)
"Execute 'guix ARGS ...' command in Guix REPL."
(guix-eval-in-repl
(apply #'guix-make-guile-expression
'guix-command args)))
(defun guix-command-output (args)
"Return string with 'guix ARGS ...' output."
(cl-multiple-value-bind (output error)
(guix-eval (apply #'guix-make-guile-expression
'guix-command-output args))
;; Remove trailing new space from the error string.
(message (replace-regexp-in-string "\n\\'" "" (read error)))
(read output)))
(defun guix-help-string (&optional commands)
"Return string with 'guix COMMANDS ... --help' output."
(guix-eval-read
(apply #'guix-make-guile-expression
'help-string commands)))
;;; Pull
(defcustom guix-update-after-pull t
"If non-nil, update Guix buffers after performing \\[guix-pull]."
:type 'boolean
:group 'guix)
(defvar guix-after-pull-hook
'(guix-restart-repl-after-pull guix-update-buffers-maybe-after-pull)
"Hook run after successful performing `guix-pull' operation.")
(defun guix-restart-repl-after-pull ()
"Restart Guix REPL after `guix-pull' operation."
(guix-repl-exit)
(guix-start-process-maybe
"Restarting Guix REPL after pull operation ..."))
(defun guix-update-buffers-maybe-after-pull ()
"Update buffers depending on `guix-update-after-pull'."
(when guix-update-after-pull
(mapc #'guix-ui-update-buffer
;; No need to update "generation" buffers.
(guix-ui-buffers '(guix-package-list-mode
guix-package-info-mode
guix-output-list-mode
guix-output-info-mode)))
(message "Guix buffers have been updated.")))
;;;###autoload
(defun guix-pull (&optional verbose)
"Run Guix pull operation.
If VERBOSE is non-nil (with prefix argument), produce verbose output."
(interactive "P")
(let ((args (and verbose '("--verbose"))))
(guix-eval-in-repl
(apply #'guix-make-guile-expression
'guix-command "pull" args)
nil 'pull)))
(provide 'guix-base)
;;; guix-base.el ends here