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.

2 files changed, 142 insertions, 1 deletions

diff --git a/tests/pack.scm b/tests/pack.scm
index a02924b7d20..734ae1c69b6 100644
--- a/tests/pack.scm
+++ b/tests/pack.scm
@@ -1,7 +1,7 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2017, 2018, 2019, 2020, 2021 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2018 Ricardo Wurmus <rekado@elephly.net>
-;;; Copyright © 2021 Maxim Cournoyer <maxim.cournoyer@gmail.com>
+;;; Copyright © 2021, 2023 Maxim Cournoyer <maxim.cournoyer@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -28,13 +28,16 @@
   #:use-module (guix tests)
   #:use-module (guix gexp)
   #:use-module (guix modules)
+  #:use-module (guix utils)
   #:use-module (gnu packages)
   #:use-module ((gnu packages base) #:select (glibc-utf8-locales))
   #:use-module (gnu packages bootstrap)
+  #:use-module ((gnu packages package-management) #:select (rpm))
   #:use-module ((gnu packages compression) #:select (squashfs-tools))
   #:use-module ((gnu packages debian) #:select (dpkg))
   #:use-module ((gnu packages guile) #:select (guile-sqlite3))
   #:use-module ((gnu packages gnupg) #:select (guile-gcrypt))
+  #:use-module ((gnu packages linux) #:select (fakeroot))
   #:use-module (srfi srfi-64))
 
 (define %store
@@ -59,6 +62,17 @@
 
 (define %ar-bootstrap %bootstrap-binutils)
 
+;;; This is a variant of the RPM package configured so that its database can
+;;; be created on a writable location readily available inside the build
+;;; container ("/tmp").
+(define rpm-for-tests
+  (package
+    (inherit rpm)
+    (arguments (substitute-keyword-arguments (package-arguments rpm)
+                 ((#:configure-flags flags '())
+                  #~(cons "--localstatedir=/tmp"
+                          (delete "--localstatedir=/var" #$flags)))))))
+
 
 (test-begin "pack")
 
@@ -356,6 +370,47 @@
                   (assert (file-exists? "triggers"))
 
                   (mkdir #$output))))))
+      (built-derivations (list check))))
+
+  (unless store (test-skip 1))
+  (test-assertm "rpm archive can be installed/uninstalled" store
+    (mlet* %store-monad
+        ((guile   (set-guile-for-build (default-guile)))
+         (profile (profile-derivation (packages->manifest
+                                       (list %bootstrap-guile))
+                                      #:hooks '()
+                                      #:locales? #f))
+         (rpm-pack (rpm-archive "rpm-pack" profile
+                                #:compressor %gzip-compressor
+                                #:symlinks '(("/bin/guile" -> "bin/guile"))
+                                #:extra-options '(#:relocatable? #t)))
+         (check
+          (gexp->derivation "check-rpm-pack"
+            (with-imported-modules (source-module-closure
+                                    '((guix build utils)))
+              #~(begin
+                  (use-modules (guix build utils))
+
+                  (define fakeroot #+(file-append fakeroot "/bin/fakeroot"))
+                  (define rpm #+(file-append rpm-for-tests "/bin/rpm"))
+                  (mkdir-p "/tmp/lib/rpm")
+
+                  ;; Install the RPM package.  This causes RPM to validate the
+                  ;; signatures, header as well as the file digests, which
+                  ;; makes it a rather thorough test.
+                  (mkdir "test-prefix")
+                  (invoke fakeroot rpm "--install"
+                          (string-append "--prefix=" (getcwd) "/test-prefix")
+                          #$rpm-pack)
+
+                  ;; Invoke the installed Guile command.
+                  (invoke "./test-prefix/bin/guile" "--version")
+
+                  ;; Uninstall the RPM package.
+                  (invoke fakeroot rpm "--erase" "guile-bootstrap")
+
+                  ;; Required so the above is run.
+                  (mkdir #$output))))))
       (built-derivations (list check)))))
 
 (test-end)
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)