From b143ec8edacbdc2afb9e0c8fb4e8940b861be01a Mon Sep 17 00:00:00 2001
From: Noé Lopez <noelopez@free.fr>
Date: Thu, 7 Nov 2024 17:50:03 +0100
Subject: gnu: appimage: New packages for the appimage runtime.
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* gnu/packages/appimage.scm
(gnu packages appimage): New module.
(appimage-type2-runtime): New variable.
* gnu/packages/file-systems.scm (squashfuse-for-appimage):
New variable.
* gnu/packages/linux.scm (fuse-for-appimage): New variable.

Change-Id: I857a8eb5399a6a493e52db70b6c8cf0c71360930
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
---
 gnu/packages/appimage.scm | 97 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 gnu/packages/appimage.scm

(limited to 'gnu/packages/appimage.scm')

diff --git a/gnu/packages/appimage.scm b/gnu/packages/appimage.scm
new file mode 100644
index 0000000000..1d0caada46
--- /dev/null
+++ b/gnu/packages/appimage.scm
@@ -0,0 +1,97 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2024 Noé Lopez <noelopez@free.fr>
+;;;
+;;; 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 packages appimage)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (gnu packages base)
+  #:use-module (gnu packages compression)
+  #:use-module (gnu packages file-systems)
+  #:use-module (gnu packages linux)
+  #:use-module (gnu packages)
+  #:use-module (guix build-system gnu)
+  #:use-module (guix gexp)
+  #:use-module (guix git-download)
+  #:use-module (guix packages)
+  #:use-module (guix utils))
+
+(define-public appimage-type2-runtime
+  (let ((revision "0")
+        ;; No releases, just the latest commit.
+        (commit "47b665594856b4e8928f8932adcf6d13061d8c30"))
+    (package
+      (name "appimage-type2-runtime")
+      (version (git-version "continuous" revision commit))
+      (source
+       (origin
+         (method git-fetch)
+         (uri (git-reference
+               (url "https://github.com/AppImage/type2-runtime")
+               (commit commit)))
+         (file-name (git-file-name name version))
+         (sha256
+          (base32 "0954crhlbapxis96g1s0vfpf78ybr64zvjalak387ksxj560g44x"))))
+      (arguments
+       (list
+        #:make-flags
+        #~(list "-Csrc/runtime" "runtime-fuse3"
+                (string-append
+                 "CFLAGS=" "-I" #$(this-package-input "fuse") "/include/fuse/"
+                 " -DGIT_COMMIT='\"" "guix-" #$version "\"'"
+                 " -D_FILE_OFFSET_BITS=64"
+                 " -static"))
+        #:modules
+        `((guix build gnu-build-system)
+          (guix build utils)
+          (ice-9 binary-ports))
+        #:phases #~(modify-phases %standard-phases
+                     (delete 'configure)
+                     (delete 'check)    ; No tests.
+                     (replace 'install
+                       (lambda _
+                         (install-file "src/runtime/runtime-fuse3"
+                                       (string-append #$output "/bin"))))
+                     ;; Must be after all elf reliant phases.  Used to identify the
+                     ;; executable as an AppImage as per the specification.
+                     (add-after 'make-dynamic-linker-cache 'set-magic-bytes
+                       (lambda _
+                         (let ((port (open (string-append #$output
+                                            "/bin/runtime-fuse3")
+                                           (logior O_WRONLY))))
+                           (seek port 8 SEEK_SET)
+                           (put-bytevector port #vu8(#x41 #x49 #x02))
+                           (close-port port)))))
+        #:disallowed-references (list squashfuse-for-appimage
+                                      fuse-for-appimage
+                                      (gexp-input zstd "static")
+                                      (gexp-input zlib "static"))))
+      ;; Only needed at build time.
+      (inputs (list squashfuse-for-appimage
+                    fuse-for-appimage
+                    `(,zstd "static")
+                    `(,zlib "static")))
+      (build-system gnu-build-system)
+      (home-page "https://github.com/AppImage/type2-runtime")
+      (synopsis "Runtime for executing AppImages")
+      (description "The runtime is the executable part of every AppImage.  It mounts
+the payload via @acronym{FUSE} and executes the entrypoint, allowing users to run
+applications in a portable manner without the need for installation.  This runtime
+ensures that the AppImage can access its bundled libraries and resources seamlessly,
+providing a consistent environment across different Linux distributions.  In the
+absence of @acronym{FUSE}, the AppImage can still be started using the
+@option{--appimage-extract-and-run} flag.")
+      (license license:expat))))
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