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Diffstat (limited to 'gnu/home/services/xdg.scm')
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diff --git a/gnu/home/services/xdg.scm b/gnu/home/services/xdg.scm new file mode 100644 index 0000000000..d230dd7665 --- /dev/null +++ b/gnu/home/services/xdg.scm @@ -0,0 +1,477 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2021 Andrew Tropin <andrew@trop.in> +;;; Copyright © 2021 Xinglu Chen <public@yoctocell.xyz> +;;; +;;; 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 GNU Guix. If not, see <http://www.gnu.org/licenses/>. + +(define-module (gnu home services xdg) + #:use-module (gnu services configuration) + #:use-module (gnu home services) + #:use-module (gnu packages freedesktop) + #:use-module (gnu home services utils) + #:use-module (guix gexp) + #:use-module (guix records) + #:use-module (guix i18n) + #:use-module (guix diagnostics) + + #:use-module (ice-9 match) + #:use-module (srfi srfi-1) + #:use-module (rnrs enums) + + #:export (home-xdg-base-directories-service-type + home-xdg-base-directories-configuration + home-xdg-base-directories-configuration? + + home-xdg-user-directories-service-type + home-xdg-user-directories-configuration + home-xdg-user-directories-configuration? + + xdg-desktop-action + xdg-desktop-entry + home-xdg-mime-applications-service-type + home-xdg-mime-applications-configuration)) + +;;; Commentary: +;; +;; This module contains services related to XDG directories and +;; applications. +;; +;; - XDG base directories +;; - XDG user directories +;; - XDG MIME applications +;; +;;; Code: + + +;;; +;;; XDG base directories. +;;; + +(define (serialize-path field-name val) "") +(define path? string?) + +(define-configuration home-xdg-base-directories-configuration + (cache-home + (path "$HOME/.cache") + "Base directory for programs to store user-specific non-essential +(cached) data. Files in this directory can be deleted anytime without +loss of important data.") + (config-home + (path "$HOME/.config") + "Base directory for programs to store configuration files. +Some programs store here log or state files, but it's not desired, +this directory should contain static configurations.") + (data-home + (path "$HOME/.local/share") + "Base directory for programs to store architecture independent +read-only shared data, analogus to @file{/usr/share}, but for user.") + (runtime-dir + (path "${XDG_RUNTIME_DIR:-/run/user/$UID}") + "Base directory for programs to store user-specific runtime files, +like sockets.") + (log-home + (path "$HOME/.local/var/log") + "Base directory for programs to store log files, analogus to +@file{/var/log}, but for user. It is not a part of XDG Base Directory +Specification, but helps to make implementation of home services more +consistent.") + (state-home + (path "$HOME/.local/var/lib") + "Base directory for programs to store state files, like databases, +analogus to @file{/var/lib}, but for user. It is not a part of XDG +Base Directory Specification, but helps to make implementation of home +services more consistent.")) + +(define (home-xdg-base-directories-environment-variables-service config) + (map + (lambda (field) + (cons (format + #f "XDG_~a" + (object->snake-case-string (configuration-field-name field) 'upper)) + ((configuration-field-getter field) config))) + home-xdg-base-directories-configuration-fields)) + +(define (ensure-xdg-base-dirs-on-activation config) + #~(map (lambda (xdg-base-dir-variable) + ((@@ (guix build utils) mkdir-p) + (getenv + xdg-base-dir-variable))) + '#$(map (lambda (field) + (format + #f "XDG_~a" + (object->snake-case-string + (configuration-field-name field) 'upper))) + home-xdg-base-directories-configuration-fields))) + +(define (last-extension-or-cfg config extensions) + "Picks configuration value from last provided extension. If there +are no extensions use configuration instead." + (or (and (not (null? extensions)) (last extensions)) config)) + +(define home-xdg-base-directories-service-type + (service-type (name 'home-xdg-base-directories) + (extensions + (list (service-extension + home-environment-variables-service-type + home-xdg-base-directories-environment-variables-service) + (service-extension + home-activation-service-type + ensure-xdg-base-dirs-on-activation))) + (default-value (home-xdg-base-directories-configuration)) + (compose identity) + (extend last-extension-or-cfg) + (description "Configure XDG base directories. This +service introduces two additional variables @env{XDG_STATE_HOME}, +@env{XDG_LOG_HOME}. They are not a part of XDG specification, at +least yet, but are convenient to have, it improves the consistency +between different home services. The services of this service-type is +instantiated by default, to provide non-default value, extend the +service-type (using @code{simple-service} for example)."))) + +(define (generate-home-xdg-base-directories-documentation) + (generate-documentation + `((home-xdg-base-directories-configuration + ,home-xdg-base-directories-configuration-fields)) + 'home-xdg-base-directories-configuration)) + + +;;; +;;; XDG user directories. +;;; + +(define (serialize-string field-name val) + ;; The path has to be quoted + (format #f "XDG_~a_DIR=\"~a\"\n" + (object->snake-case-string field-name 'upper) val)) + +(define-configuration home-xdg-user-directories-configuration + (desktop + (string "$HOME/Desktop") + "Default ``desktop'' directory, this is what you see on your +desktop when using a desktop environment, +e.g. GNOME (@pxref{XWindow,,,guix.info}).") + (documents + (string "$HOME/Documents") + "Default directory to put documents like PDFs.") + (download + (string "$HOME/Downloads") + "Default directory downloaded files, this is where your Web-broser +will put downloaded files in.") + (music + (string "$HOME/Music") + "Default directory for audio files.") + (pictures + (string "$HOME/Pictures") + "Default directory for pictures and images.") + (publicshare + (string "$HOME/Public") + "Default directory for shared files, which can be accessed by other +users on local machine or via network.") + (templates + (string "$HOME/Templates") + "Default directory for templates. They can be used by graphical +file manager or other apps for creating new files with some +pre-populated content.") + (videos + (string "$HOME/Videos") + "Default directory for videos.")) + +(define (home-xdg-user-directories-files-service config) + `(("config/user-dirs.conf" + ,(mixed-text-file + "user-dirs.conf" + "enabled=False\n")) + ("config/user-dirs.dirs" + ,(mixed-text-file + "user-dirs.dirs" + (serialize-configuration + config + home-xdg-user-directories-configuration-fields))))) + +(define (home-xdg-user-directories-activation-service config) + (let ((dirs (map (lambda (field) + ((configuration-field-getter field) config)) + home-xdg-user-directories-configuration-fields))) + #~(let ((ensure-dir + (lambda (path) + (mkdir-p + ((@@ (ice-9 string-fun) string-replace-substring) + path "$HOME" (getenv "HOME")))))) + (display "Creating XDG user directories...") + (map ensure-dir '#$dirs) + (display " done\n")))) + +(define home-xdg-user-directories-service-type + (service-type (name 'home-xdg-user-directories) + (extensions + (list (service-extension + home-files-service-type + home-xdg-user-directories-files-service) + (service-extension + home-activation-service-type + home-xdg-user-directories-activation-service))) + (default-value (home-xdg-user-directories-configuration)) + (description "Configure XDG user directories. To +disable a directory, point it to the $HOME."))) + +(define (generate-home-xdg-user-directories-documentation) + (generate-documentation + `((home-xdg-user-directories-configuration + ,home-xdg-user-directories-configuration-fields)) + 'home-xdg-user-directories-configuration)) + + +;;; +;;; XDG MIME applications. +;;; + +;; Example config +;; +;; (home-xdg-mime-applications-configuration +;; (added '((x-scheme-handler/magnet . torrent.desktop))) +;; (default '((inode/directory . file.desktop))) +;; (removed '((inode/directory . thunar.desktop))) +;; (desktop-entries +;; (list (xdg-desktop-entry +;; (file "file") +;; (name "File manager") +;; (type 'application) +;; (config +;; '((exec . "emacsclient -c -a emacs %u")))) +;; (xdg-desktop-entry +;; (file "text") +;; (name "Text editor") +;; (type 'application) +;; (config +;; '((exec . "emacsclient -c -a emacs %u"))) +;; (actions +;; (list (xdg-desktop-action +;; (action 'create) +;; (name "Create an action") +;; (config +;; '((exec . "echo hi")))))))))) + +;; See +;; <https://specifications.freedesktop.org/shared-mime-info-spec/shared-mime-info-spec-latest.html> +;; <https://specifications.freedesktop.org/mime-apps-spec/mime-apps-spec-latest.html> + +(define (serialize-alist field-name val) + (define (serialize-mimelist-entry key val) + (let ((val (cond + ((list? val) + (string-join (map maybe-object->string val) ";")) + ((or (string? val) (symbol? val)) + val) + (else (raise (formatted-message + (G_ "\ +The value of an XDG MIME entry must be a list, string or symbol, was given ~a") + val)))))) + (format #f "~a=~a\n" key val))) + + (define (merge-duplicates alist acc) + "Merge values that have the same key. + +@example +(merge-duplicates '((key1 . value1) + (key2 . value2) + (key1 . value3) + (key1 . value4)) '()) + +@result{} ((key1 . (value4 value3 value1)) (key2 . value2)) +@end example" + (cond + ((null? alist) acc) + (else (let* ((head (first alist)) + (tail (cdr alist)) + (key (first head)) + (value (cdr head)) + (duplicate? (assoc key acc)) + (ensure-list (lambda (x) + (if (list? x) x (list x))))) + (if duplicate? + ;; XXX: This will change the order of things, + ;; though, it shouldn't be a problem for XDG MIME. + (merge-duplicates + tail + (alist-cons key + (cons value (ensure-list (cdr duplicate?))) + (alist-delete key acc))) + (merge-duplicates tail (cons head acc))))))) + + (string-append (if (equal? field-name 'default) + "\n[Default Applications]\n" + (format #f "\n[~a Associations]\n" + (string-capitalize (symbol->string field-name)))) + (generic-serialize-alist string-append + serialize-mimelist-entry + (merge-duplicates val '())))) + +(define xdg-desktop-types (make-enumeration + '(application + link + directory))) + +(define (xdg-desktop-type? type) + (unless (enum-set-member? type xdg-desktop-types) + (raise (formatted-message + (G_ "XDG desktop type must be of of ~a, was given: ~a") + (list->human-readable-list (enum-set->list xdg-desktop-types)) + type)))) + +;; TODO: Add proper docs for this +;; XXX: 'define-configuration' require that fields have a default +;; value. +(define-record-type* <xdg-desktop-action> + xdg-desktop-action make-xdg-desktop-action + xdg-desktop-action? + (action xdg-desktop-action-action) ; symbol + (name xdg-desktop-action-name) ; string + (config xdg-desktop-action-config ; alist + (default '()))) + +(define-record-type* <xdg-desktop-entry> + xdg-desktop-entry make-xdg-desktop-entry + xdg-desktop-entry? + ;; ".desktop" will automatically be added + (file xdg-desktop-entry-file) ; string + (name xdg-desktop-entry-name) ; string + (type xdg-desktop-entry-type) ; xdg-desktop-type + (config xdg-desktop-entry-config ; alist + (default '())) + (actions xdg-desktop-entry-actions ; list of <xdg-desktop-action> + (default '()))) + +(define desktop-entries? (list-of xdg-desktop-entry?)) +(define (serialize-desktop-entries field-name val) "") + +(define (serialize-xdg-desktop-entry entry) + "Return a tuple of the file name for ENTRY and the serialized +configuration." + (define (format-config key val) + (let ((val (cond + ((list? val) + (string-join (map maybe-object->string val) ";")) + ((boolean? val) + (if val "true" "false")) + (else val))) + (key (string-capitalize (maybe-object->string key)))) + (list (if (string-suffix? key "?") + (string-drop-right key (- (string-length key) 1)) + key) + "=" val "\n"))) + + (define (serialize-alist config) + (generic-serialize-alist identity format-config config)) + + (define (serialize-xdg-desktop-action action) + (match action + (($ <xdg-desktop-action> action name config) + `(,(format #f "[Desktop Action ~a]\n" + (string-capitalize (maybe-object->string action))) + ,(format #f "Name=~a\n" name) + ,@(serialize-alist config))))) + + (match entry + (($ <xdg-desktop-entry> file name type config actions) + (list (if (string-suffix? file ".desktop") + file + (string-append file ".desktop")) + `("[Desktop Entry]\n" + ,(format #f "Name=~a\n" name) + ,(format #f "Type=~a\n" + (string-capitalize (symbol->string type))) + ,@(serialize-alist config) + ,@(append-map serialize-xdg-desktop-action actions)))))) + +(define-configuration home-xdg-mime-applications-configuration + (added + (alist '()) + "An association list of MIME types and desktop entries which indicate +that the application should used to open the specified MIME type. The +value has to be string, symbol, or list of strings or symbols, this +applies to the `@code{default}', and `@code{removed}' fields as well.") + (default + (alist '()) + "An association list of MIME types and desktop entries which indicate +that the application should be the default for opening the specified +MIME type.") + (removed + (alist '()) + "An association list of MIME types and desktop entries which indicate +that the application cannot open the specified MIME type.") + (desktop-entries + (desktop-entries '()) + "A list of XDG desktop entries to create. See +@code{xdg-desktop-entry}.")) + +(define (home-xdg-mime-applications-files-service config) + (define (add-xdg-desktop-entry-file entry) + (let ((file (first entry)) + (config (second entry))) + (list (format #f "local/share/applications/~a" file) + (apply mixed-text-file + (format #f "xdg-desktop-~a-entry" file) + config)))) + + (append + `(("config/mimeapps.list" + ,(mixed-text-file + "xdg-mime-appplications" + (serialize-configuration + config + home-xdg-mime-applications-configuration-fields)))) + (map (compose add-xdg-desktop-entry-file serialize-xdg-desktop-entry) + (home-xdg-mime-applications-configuration-desktop-entries config)))) + +(define (home-xdg-mime-applications-extension old-config extension-configs) + (define (extract-fields config) + ;; return '(added default removed desktop-entries) + (list (home-xdg-mime-applications-configuration-added config) + (home-xdg-mime-applications-configuration-default config) + (home-xdg-mime-applications-configuration-removed config) + (home-xdg-mime-applications-configuration-desktop-entries config))) + + (define (append-configs elem acc) + (list (append (first elem) (first acc)) + (append (second elem) (second acc)) + (append (third elem) (third acc)) + (append (fourth elem) (fourth acc)))) + + ;; TODO: Implement procedure to check for duplicates without + ;; sacrificing performance. + ;; + ;; Combine all the alists from 'added', 'default' and 'removed' + ;; into one big alist. + (let ((folded-configs (fold append-configs + (extract-fields old-config) + (map extract-fields extension-configs)))) + (home-xdg-mime-applications-configuration + (added (first folded-configs)) + (default (second folded-configs)) + (removed (third folded-configs)) + (desktop-entries (fourth folded-configs))))) + +(define home-xdg-mime-applications-service-type + (service-type (name 'home-xdg-mime-applications) + (extensions + (list (service-extension + home-files-service-type + home-xdg-mime-applications-files-service))) + (compose identity) + (extend home-xdg-mime-applications-extension) + (default-value (home-xdg-mime-applications-configuration)) + (description + "Configure XDG MIME applications, and XDG desktop entries."))) |