scripts: Add --list-systems and --list-targets options.

Also factorize the --system and --target build options. Check that the passed
system and target arguments are known platforms.

* doc/guix.texi (Additional Build Options): Document the new --list-systems
and --list-targets options.
* guix/scripts/build.scm (show-cross-build-options-help,
show-emulated-build-options-help, list-systems, list-targets): New procedures.
(%standard-cross-build-options, %standard-emulated-build-options): New
variables.
(show-help): Remove --system and --target entries and use
show-cross-build-options-help and show-emulated-build-options-help procedures instead.
(%options): Remove --system and --target entries and use
%standard-cross-build-options and %standard-emulated-build-options variables instead.
* guix/scripts/archive.scm (show-help, %options): Adapt them.
* guix/scripts/environment.scm: Ditto.
* guix/scripts/graph.scm: Ditto.
* guix/scripts/pack.scm: Ditto.
* guix/scripts/pull.scm: Ditto.
* guix/scripts/size.scm: Ditto.
* guix/scripts/weather.scm: Ditto.

Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>

1 files changed, 7 insertions, 13 deletions

diff --git a/guix/scripts/pack.scm b/guix/scripts/pack.scm
index 32f0d3abb1..d3ee69840c 100644
--- a/guix/scripts/pack.scm
+++ b/guix/scripts/pack.scm
@@ -1244,17 +1244,9 @@ last resort for relocation."
          (option '(#\m "manifest") #t #f
                  (lambda (opt name arg result)
                    (alist-cons 'manifest arg result)))
-         (option '(#\s "system") #t #f
-                 (lambda (opt name arg result)
-                   (alist-cons 'system arg
-                               (alist-delete 'system result eq?))))
          (option '("entry-point") #t #f
                  (lambda (opt name arg result)
                    (alist-cons 'entry-point arg result)))
-         (option '("target") #t #f
-                 (lambda (opt name arg result)
-                   (alist-cons 'target arg
-                               (alist-delete 'target result eq?))))
          (option '(#\C "compression") #t #f
                  (lambda (opt name arg result)
                    (alist-cons 'compressor (lookup-compressor arg)
@@ -1305,13 +1297,19 @@ last resort for relocation."
 
          (append %deb-format-options
                  %transformation-options
-                 %standard-build-options)))
+                 %standard-build-options
+                 %standard-cross-build-options
+                 %standard-native-build-options)))
 
 (define (show-help)
   (display (G_ "Usage: guix pack [OPTION]... PACKAGE...
 Create a bundle of PACKAGE.\n"))
   (show-build-options-help)
   (newline)
+  (show-cross-build-options-help)
+  (newline)
+  (show-native-build-options-help)
+  (newline)
   (show-transformation-options-help)
   (newline)
   (show-deb-format-options)
@@ -1325,10 +1323,6 @@ Create a bundle of PACKAGE.\n"))
   (display (G_ "
   -e, --expression=EXPR  consider the package EXPR evaluates to"))
   (display (G_ "
-  -s, --system=SYSTEM    attempt to build for SYSTEM--e.g., \"i686-linux\""))
-  (display (G_ "
-      --target=TRIPLET   cross-build for TRIPLET--e.g., \"armel-linux-gnu\""))
-  (display (G_ "
   -C, --compression=TOOL compress using TOOL--e.g., \"lzip\""))
   (display (G_ "
   -S, --symlink=SPEC     create symlinks to the profile according to SPEC"))