pack: Add RPM format.

* guix/rpm.scm: New file.
* guix/scripts/pack.scm (rpm-archive): New procedure.
(%formats): Register it.
(show-formats): Add it.
(guix-pack): Register supported extra-options for the rpm format.
* tests/pack.scm (rpm-for-tests): New variable.
("rpm archive can be installed/uninstalled"): New test.
* tests/rpm.scm: New test.
* doc/guix.texi (Invoking guix pack): Document it.

1 files changed, 86 insertions, 0 deletions

diff --git a/tests/rpm.scm b/tests/rpm.scm
new file mode 100644
index 00000000000..f40b36fe603
--- /dev/null
+++ b/tests/rpm.scm
@@ -0,0 +1,86 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2023 Maxim Cournoyer <maxim.cournoyer@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 GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (test-rpm)
+  #:use-module (guix rpm)
+  #:use-module (rnrs bytevectors)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-26)
+  #:use-module (srfi srfi-64)
+  #:use-module (srfi srfi-71))
+
+;; For white-box testing.
+(define-syntax-rule (expose-internal name)
+  (define name (@@ (guix rpm) name)))
+
+(expose-internal RPMTAG_ARCH)
+(expose-internal RPMTAG_LICENSE)
+(expose-internal RPMTAG_NAME)
+(expose-internal RPMTAG_OS)
+(expose-internal RPMTAG_RELEASE)
+(expose-internal RPMTAG_SUMMARY)
+(expose-internal RPMTAG_VERSION)
+(expose-internal header-entry-count)
+(expose-internal header-entry-tag)
+(expose-internal header-entry-value)
+(expose-internal header-entry?)
+(expose-internal make-header)
+(expose-internal make-header-entry)
+(expose-internal make-header-index+data)
+
+(test-begin "rpm")
+
+(test-equal "lead must be 96 bytes long"
+  96
+  (length (generate-lead "hello-2.12.1")))
+
+(define header-entries
+  (list (make-header-entry RPMTAG_NAME 1 "hello")
+        (make-header-entry RPMTAG_VERSION 1 "2.12.1")
+        (make-header-entry RPMTAG_RELEASE 1 "0")
+        (make-header-entry RPMTAG_SUMMARY 1
+                           "Hello, GNU world: An example GNU package")
+        (make-header-entry RPMTAG_LICENSE 1 "GPL 3 or later")
+        (make-header-entry RPMTAG_OS 1 "Linux")
+        (make-header-entry RPMTAG_ARCH 1 "x86_64")))
+
+(define expected-header-index-length
+  (* 16 (length header-entries)))       ;16 bytes per index entry
+
+(define expected-header-data-length
+  (+ (length header-entries)            ;to account for null bytes
+     (fold + 0 (map (compose string-length (cut header-entry-value <>))
+                    header-entries))))
+
+(let ((index data (make-header-index+data header-entries)))
+  (test-equal "header index"
+    expected-header-index-length
+    (length index))
+
+  ;; This test depends on the fact that only STRING entries are used, and that
+  ;; they are composed of single byte characters and the delimiting null byte.
+  (test-equal "header data"
+    expected-header-data-length
+    (length data)))
+
+(test-equal "complete header section"
+  (+ 16                                 ;leading magic + count bytes
+     expected-header-index-length expected-header-data-length)
+  (length (make-header header-entries)))
+
+(test-end)