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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014 Federico Beffa <beffa@fbengineering.ch>
;;; Copyright © 2014, 2015 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2018 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2021 Maxime Devos <maximedevos@telenet.be>
;;;
;;; 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 (guix build glib-or-gtk-build-system)
#:use-module ((guix build gnu-build-system) #:prefix gnu:)
#:use-module (guix build utils)
#:use-module (ice-9 match)
#:use-module (ice-9 regex)
#:use-module (ice-9 ftw)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:export (%standard-phases
glib-or-gtk-build))
;; Commentary:
;;
;; Builder-side code of the standard glib-or-gtk build procedure.
;;
;; Code:
(define (subdirectory-exists? parent sub-directory)
(directory-exists? (string-append parent sub-directory)))
(define (directory-included? directory directories-list)
"Is DIRECTORY included in DIRECTORIES-LIST?"
(fold (lambda (s p) (or (string-ci=? s directory) p))
#f directories-list))
;; We do not include $HOME/.guix-profile/gtk-v.0 (v=2 or 3) because we do not
;; want to mix gtk+-2 and gtk+-3 modules. See
;; https://developer.gnome.org/gtk3/stable/gtk-running.html
(define (gtk-module-directories inputs)
"Check for the existence of \"libdir/gtk-v.0\" in INPUTS. Return a list
with all found directories."
(let* ((version
(cond
((string-match "gtk-4"
(or (assoc-ref inputs "gtk")
(assoc-ref inputs "source")
""))
"4.0")
((string-match "gtk\\+-3"
(or (assoc-ref inputs "gtk+")
(assoc-ref inputs "source")
""))
"3.0")
((string-match "gtk\\+-2"
(or (assoc-ref inputs "gtk+")
(assoc-ref inputs "source")
""))
"2.0")
(else
"4.0"))) ; We default to version 4.0.
(gtk-module
(lambda (input prev)
(let* ((in (match input
((_ . dir) dir)
(_ "")))
(libdir
(string-append in "/lib/gtk-" version)))
(if (and (directory-exists? libdir)
(not (directory-included? libdir prev)))
(cons libdir prev)
prev)))))
(fold gtk-module '() inputs)))
;; See
;; http://www.freedesktop.org/wiki/DesktopThemeSpec
;; http://freedesktop.org/wiki/Specifications/sound-theme-spec
;; http://freedesktop.org/wiki/Specifications/icon-theme-spec
;;
;; Currently desktop themes are not well supported and do not honor
;; XDG_DATA_DIRS. One example is evince which only looks for desktop themes
;; in $HOME/.themes (for backward compatibility) and in XDG_DATA_HOME (which
;; defaults to $HOME/.local/share). One way to handle these applications
;; appears to be by making $HOME/.themes a symlink to
;; $HOME/.guix-profile/share/themes.
(define (data-directories inputs)
"Check for the existence of \"$datadir/glib-2.0/schemas\" or XDG themes data
in INPUTS. Return a list with all found directories."
(define (data-directory input previous)
(let* ((in (match input
((_ . dir) dir)
(_ "")))
(datadir (string-append in "/share")))
(if (and (or (subdirectory-exists? datadir "/glib-2.0/schemas")
(subdirectory-exists? datadir "/sounds")
(subdirectory-exists? datadir "/themes")
(subdirectory-exists? datadir "/cursors")
(subdirectory-exists? datadir "/wallpapers")
(subdirectory-exists? datadir "/icons")
(subdirectory-exists? datadir "/mime")) ;shared-mime-info
(not (directory-included? datadir previous)))
(cons datadir previous)
previous)))
(fold data-directory '() inputs))
;; All GIO modules are expected to be installed in GLib's $libdir/gio/modules
;; directory. That directory has to include a file called giomodule.cache
;; listing all available modules. GIO can be made aware of modules in other
;; directories with the help of the environment variable GIO_EXTRA_MODULES.
;; The official GIO documentation states that this environment variable should
;; only be used for testing and not in a production environment. However, it
;; appears that there is no other way of specifying multiple modules
;; directories (NIXOS also does use this variable). See
;; https://developer.gnome.org/gio/stable/running-gio-apps.html
(define (gio-module-directories inputs)
"Check for the existence of \"$libdir/gio/modules\" in the INPUTS and
returns a list with all found directories."
(define (gio-module-directory input previous)
(let* ((in (match input
((_ . dir) dir)
(_ "")))
(gio-mod-dir (string-append in "/lib/gio/modules")))
(if (and (directory-exists? gio-mod-dir)
(not (directory-included? gio-mod-dir previous)))
(cons gio-mod-dir previous)
previous)))
(fold gio-module-directory '() inputs))
(define* (wrap-all-programs #:key inputs outputs
(glib-or-gtk-wrap-excluded-outputs '())
#:allow-other-keys)
"Implement phase \"glib-or-gtk-wrap\": look for GSettings schemas and
gtk+-v.0 libraries and create wrappers with suitably set environment variables
if found.
Wrapping is not applied to outputs whose name is listed in
GLIB-OR-GTK-WRAP-EXCLUDED-OUTPUTS. This is useful when an output is known not
to contain any GLib or GTK+ binaries, and where wrapping would gratuitously
add a dependency of that output on GLib and GTK+."
;; Do not require bash to be present in the package inputs
;; even when there is nothing to wrap.
;; Also, calculate (sh) only once to prevent some I/O.
(define %sh (delay (search-input-file inputs "bin/bash")))
(define (sh) (force %sh))
(define handle-output
(match-lambda
((output . directory)
(unless (member output glib-or-gtk-wrap-excluded-outputs)
(let* ((bindir (string-append directory "/bin"))
(libexecdir (string-append directory "/libexec"))
(bin-list (filter (negate wrapped-program?)
(append (find-files bindir ".*")
(find-files libexecdir ".*"))))
(datadirs (data-directories
(alist-cons output directory inputs)))
(gtk-mod-dirs (gtk-module-directories
(alist-cons output directory inputs)))
(gio-mod-dirs (gio-module-directories
(alist-cons output directory inputs)))
(data-env-var
(if (not (null? datadirs))
`("XDG_DATA_DIRS" ":" prefix ,datadirs)
#f))
(gtk-mod-env-var
(if (not (null? gtk-mod-dirs))
`("GTK_PATH" ":" prefix ,gtk-mod-dirs)
#f))
(gio-mod-env-var
(if (not (null? gio-mod-dirs))
`("GIO_EXTRA_MODULES" ":" prefix ,gio-mod-dirs)
#f)))
(cond
((and data-env-var gtk-mod-env-var gio-mod-env-var)
(for-each (cut wrap-program <> #:sh (sh)
data-env-var
gtk-mod-env-var
gio-mod-env-var)
bin-list))
((and data-env-var gtk-mod-env-var (not gio-mod-env-var))
(for-each (cut wrap-program <> #:sh (sh)
data-env-var
gtk-mod-env-var)
bin-list))
((and data-env-var (not gtk-mod-env-var) gio-mod-env-var)
(for-each (cut wrap-program <> #:sh (sh)
data-env-var
gio-mod-env-var)
bin-list))
((and (not data-env-var) gtk-mod-env-var gio-mod-env-var)
(for-each (cut wrap-program <> #:sh (sh)
gio-mod-env-var
gtk-mod-env-var)
bin-list))
((and data-env-var (not gtk-mod-env-var) (not gio-mod-env-var))
(for-each (cut wrap-program <> #:sh (sh)
data-env-var)
bin-list))
((and (not data-env-var) gtk-mod-env-var (not gio-mod-env-var))
(for-each (cut wrap-program <> #:sh (sh)
gtk-mod-env-var)
bin-list))
((and (not data-env-var) (not gtk-mod-env-var) gio-mod-env-var)
(for-each (cut wrap-program <> #:sh (sh)
gio-mod-env-var)
bin-list))))))))
(for-each handle-output outputs)
#t)
(define* (compile-glib-schemas #:key outputs #:allow-other-keys)
"Implement phase \"glib-or-gtk-compile-schemas\": compile \"glib\" schemas
if needed."
(for-each (match-lambda
((output . directory)
(let ((schemasdir (string-append directory
"/share/glib-2.0/schemas")))
(when (and (directory-exists? schemasdir)
(not (file-exists?
(string-append schemasdir "/gschemas.compiled"))))
(invoke "glib-compile-schemas" schemasdir)))))
outputs)
#t)
(define %standard-phases
(modify-phases gnu:%standard-phases
(add-after 'install 'glib-or-gtk-compile-schemas compile-glib-schemas)
(add-after 'install 'glib-or-gtk-wrap wrap-all-programs)))
(define* (glib-or-gtk-build #:key inputs (phases %standard-phases)
#:allow-other-keys #:rest args)
"Build the given package, applying all of PHASES in order."
(apply gnu:gnu-build #:inputs inputs #:phases phases args))
;;; glib-or-gtk-build-system.scm ends here
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