Add (guix scripts).

* guix/ui.scm: Add missing copyright lines.
  (args-fold*, environment-build-options, %default-argument-handler,
  parse-command-line): Move to ...
* guix/scripts.scm: ...here.  New file.
* guix/scripts/archive.scm: Use it.
* guix/scripts/build.scm: Likewise.
* guix/scripts/download.scm: Likewise.
* guix/scripts/edit.scm: Likewise.
* guix/scripts/environment.scm: Likewise.
* guix/scripts/gc.scm: Likewise.
* guix/scripts/graph.scm: Likewise.
* guix/scripts/hash.scm: Likewise.
* guix/scripts/import/cpan.scm: Likewise.
* guix/scripts/import/cran.scm: Likewise.
* guix/scripts/import/elpa.scm: Likewise.
* guix/scripts/import/gem.scm: Likewise.
* guix/scripts/import/gnu.scm: Likewise.
* guix/scripts/import/hackage.scm: Likewise.
* guix/scripts/import/nix.scm: Likewise.
* guix/scripts/import/pypi.scm: Likewise.
* guix/scripts/lint.scm: Likewise.
* guix/scripts/package.scm: Likewise.
* guix/scripts/publish.scm: Likewise.
* guix/scripts/pull.scm: Likewise.
* guix/scripts/refresh.scm: Likewise.
* guix/scripts/size.scm: Likewise.
* guix/scripts/system.scm: Likewise.
* tests/ui.scm (with-environment-variable, "parse-command-line",
  "parse-command-line and --no options"): Move to ...
* tests/scripts.scm: ...here.  New file.
* Makefile.am (MODULES): Add guix/scripts.scm.
  (SCM_TESTS): Add tests/scripts.scm.
* po/guix/POTFILES.in: Add guix/scripts.scm.

Makefile.am

@@ -102,6 +102,7 @@ MODULES =					\
   guix/import/cran.scm				\
   guix/import/hackage.scm			\
   guix/import/elpa.scm   			\
+  guix/scripts.scm				\
   guix/scripts/download.scm			\
   guix/scripts/build.scm			\
   guix/scripts/archive.scm			\
@@ -214,6 +215,7 @@ SCM_TESTS =					\
   tests/gremlin.scm				\
   tests/lint.scm				\
   tests/publish.scm				\
+  tests/scripts.scm				\
   tests/size.scm				\
   tests/graph.scm				\
   tests/file-systems.scm			\

guix/scripts.scm

@@ -0,0 +1,81 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2014 Deck Pickard <deck.r.pickard@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 (guix scripts)
+  #:use-module (guix utils)
+  #:use-module (guix ui)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-37)
+  #:use-module (ice-9 match)
+  #:export (args-fold*
+            parse-command-line))
+
+;;; Commentary:
+;;;
+;;; General code for Guix scripts.
+;;;
+;;; Code:
+
+(define (args-fold* options unrecognized-option-proc operand-proc . seeds)
+  "A wrapper on top of `args-fold' that does proper user-facing error
+reporting."
+  (catch 'misc-error
+    (lambda ()
+      (apply args-fold options unrecognized-option-proc
+             operand-proc seeds))
+    (lambda (key proc msg args . rest)
+      ;; XXX: MSG is not i18n'd.
+      (leave (_ "invalid argument: ~a~%")
+             (apply format #f msg args)))))
+
+(define (environment-build-options)
+  "Return additional build options passed as environment variables."
+  (arguments-from-environment-variable "GUIX_BUILD_OPTIONS"))
+
+(define %default-argument-handler
+  ;; The default handler for non-option command-line arguments.
+  (lambda (arg result)
+    (alist-cons 'argument arg result)))
+
+(define* (parse-command-line args options seeds
+                             #:key
+                             (argument-handler %default-argument-handler))
+  "Parse the command-line arguments ARGS as well as arguments passed via the
+'GUIX_BUILD_OPTIONS' environment variable according to OPTIONS (a list of
+SRFI-37 options) and return the result, seeded by SEEDS.
+Command-line options take precedence those passed via 'GUIX_BUILD_OPTIONS'.
+
+ARGUMENT-HANDLER is called for non-option arguments, like the 'operand-proc'
+parameter of 'args-fold'."
+  (define (parse-options-from args seeds)
+    ;; Actual parsing takes place here.
+    (apply args-fold* args options
+           (lambda (opt name arg . rest)
+             (leave (_ "~A: unrecognized option~%") name))
+           argument-handler
+           seeds))
+
+  (call-with-values
+      (lambda ()
+        (parse-options-from (environment-build-options) seeds))
+    (lambda seeds
+      ;; ARGS take precedence over what the environment variable specifies.
+      (parse-options-from args seeds))))
+
+;;; scripts.scm ends here

guix/scripts/archive.scm

@@ -27,6 +27,7 @@ (define-module (guix scripts archive)
   #:use-module (guix ui)
   #:use-module (guix pki)
   #:use-module (guix pk-crypto)
+  #:use-module (guix scripts)
   #:use-module (guix scripts build)
   #:use-module (gnu packages)
   #:use-module (ice-9 match)

guix/scripts/build.scm

@@ -19,6 +19,7 @@
 
 (define-module (guix scripts build)
   #:use-module (guix ui)
+  #:use-module (guix scripts)
   #:use-module (guix store)
   #:use-module (guix derivations)
   #:use-module (guix packages)

guix/scripts/download.scm

@@ -18,6 +18,7 @@
 
 (define-module (guix scripts download)
   #:use-module (guix ui)
+  #:use-module (guix scripts)
   #:use-module (guix store)
   #:use-module (guix hash)
   #:use-module (guix utils)

guix/scripts/edit.scm

@@ -18,6 +18,7 @@
 
 (define-module (guix scripts edit)
   #:use-module (guix ui)
+  #:use-module (guix scripts)
   #:use-module (guix utils)
   #:use-module (guix packages)
   #:use-module (gnu packages)

guix/scripts/environment.scm

@@ -27,6 +27,7 @@ (define-module (guix scripts environment)
   #:use-module (guix utils)
   #:use-module (guix monads)
   #:use-module ((guix gexp) #:select (lower-inputs))
+  #:use-module (guix scripts)
   #:use-module (guix scripts build)
   #:use-module (gnu packages)
   #:use-module (ice-9 format)

guix/scripts/gc.scm

@@ -18,6 +18,7 @@
 
 (define-module (guix scripts gc)
   #:use-module (guix ui)
+  #:use-module (guix scripts)
   #:use-module (guix store)
   #:use-module (ice-9 match)
   #:use-module (ice-9 regex)

guix/scripts/graph.scm

@@ -18,6 +18,7 @@
 
 (define-module (guix scripts graph)
   #:use-module (guix ui)
+  #:use-module (guix scripts)
   #:use-module (guix utils)
   #:use-module (guix packages)
   #:use-module (guix monads)

guix/scripts/hash.scm

@@ -22,6 +22,7 @@ (define-module (guix scripts hash)
   #:use-module (guix hash)
   #:use-module (guix serialization)
   #:use-module (guix ui)
+  #:use-module (guix scripts)
   #:use-module (guix utils)
   #:use-module (rnrs io ports)
   #:use-module (rnrs files)

guix/scripts/import/cpan.scm

@@ -19,6 +19,7 @@
 (define-module (guix scripts import cpan)
   #:use-module (guix ui)
   #:use-module (guix utils)
+  #:use-module (guix scripts)
   #:use-module (guix import cpan)
   #:use-module (guix scripts import)
   #:use-module (srfi srfi-1)

guix/scripts/import/cran.scm

@@ -20,6 +20,7 @@
 (define-module (guix scripts import cran)
   #:use-module (guix ui)
   #:use-module (guix utils)
+  #:use-module (guix scripts)
   #:use-module (guix import cran)
   #:use-module (guix scripts import)
   #:use-module (srfi srfi-1)

guix/scripts/import/elpa.scm

@@ -19,6 +19,7 @@
 (define-module (guix scripts import elpa)
   #:use-module (guix ui)
   #:use-module (guix utils)
+  #:use-module (guix scripts)
   #:use-module (guix import elpa)
   #:use-module (guix scripts import)
   #:use-module (srfi srfi-1)

guix/scripts/import/gem.scm

@@ -19,6 +19,7 @@
 (define-module (guix scripts import gem)
   #:use-module (guix ui)
   #:use-module (guix utils)
+  #:use-module (guix scripts)
   #:use-module (guix import gem)
   #:use-module (guix scripts import)
   #:use-module (srfi srfi-1)

guix/scripts/import/gnu.scm

@@ -19,6 +19,7 @@
 (define-module (guix scripts import gnu)
   #:use-module (guix ui)
   #:use-module (guix utils)
+  #:use-module (guix scripts)
   #:use-module (guix import gnu)
   #:use-module (guix scripts import)
   #:use-module (srfi srfi-1)

guix/scripts/import/hackage.scm

@@ -19,6 +19,7 @@
 (define-module (guix scripts import hackage)
   #:use-module (guix ui)
   #:use-module (guix utils)
+  #:use-module (guix scripts)
   #:use-module (guix import hackage)
   #:use-module (guix scripts import)
   #:use-module (srfi srfi-1)

guix/scripts/import/nix.scm

@@ -20,6 +20,7 @@
 (define-module (guix scripts import nix)
   #:use-module (guix ui)
   #:use-module (guix utils)
+  #:use-module (guix scripts)
   #:use-module (guix import snix)
   #:use-module (guix scripts import)
   #:use-module (srfi srfi-1)

guix/scripts/import/pypi.scm

@@ -19,6 +19,7 @@
 (define-module (guix scripts import pypi)
   #:use-module (guix ui)
   #:use-module (guix utils)
+  #:use-module (guix scripts)
   #:use-module (guix import pypi)
   #:use-module (guix scripts import)
   #:use-module (srfi srfi-1)

guix/scripts/lint.scm

@@ -29,6 +29,7 @@ (define-module (guix scripts lint)
   #:use-module (guix records)
   #:use-module (guix ui)
   #:use-module (guix utils)
+  #:use-module (guix scripts)
   #:use-module (guix gnu-maintenance)
   #:use-module (guix monads)
   #:use-module (gnu packages)

guix/scripts/package.scm

@@ -29,6 +29,7 @@ (define-module (guix scripts package)
   #:use-module (guix monads)
   #:use-module (guix utils)
   #:use-module (guix config)
+  #:use-module (guix scripts)
   #:use-module (guix scripts build)
   #:use-module ((guix build utils)
                 #:select (directory-exists? mkdir-p search-path-as-list))

guix/scripts/publish.scm

@@ -45,6 +45,7 @@ (define-module (guix scripts publish)
   #:use-module (guix store)
   #:use-module (guix serialization)
   #:use-module (guix ui)
+  #:use-module (guix scripts)
   #:export (guix-publish))
 
 (define (show-help)

guix/scripts/pull.scm

@@ -18,6 +18,7 @@
 
 (define-module (guix scripts pull)
   #:use-module (guix ui)
+  #:use-module (guix scripts)
   #:use-module (guix store)
   #:use-module (guix config)
   #:use-module (guix packages)

guix/scripts/refresh.scm

@@ -21,6 +21,7 @@
 (define-module (guix scripts refresh)
   #:use-module (guix ui)
   #:use-module (guix hash)
+  #:use-module (guix scripts)
   #:use-module (guix store)
   #:use-module (guix utils)
   #:use-module (guix packages)

guix/scripts/size.scm

@@ -18,6 +18,7 @@
 
 (define-module (guix scripts size)
   #:use-module (guix ui)
+  #:use-module (guix scripts)
   #:use-module (guix store)
   #:use-module (guix monads)
   #:use-module (guix utils)

guix/scripts/system.scm

@@ -26,6 +26,7 @@ (define-module (guix scripts system)
   #:use-module (guix utils)
   #:use-module (guix monads)
   #:use-module (guix profiles)
+  #:use-module (guix scripts)
   #:use-module (guix scripts build)
   #:use-module (guix build utils)
   #:use-module (gnu build install)

guix/ui.scm

@@ -2,9 +2,11 @@
 ;;; Copyright © 2012, 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2013 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2013 Nikita Karetnikov <nikita@karetnikov.org>
+;;; Copyright © 2014 Cyril Roelandt <tipecaml@gmail.com>
+;;; Copyright © 2014 Cyrill Schenkel <cyrill.schenkel@gmail.com>
 ;;; Copyright © 2014, 2015 Alex Kost <alezost@gmail.com>
+;;; Copyright © 2015 David Thompson <davet@gnu.org>
 ;;; Copyright © 2015 Mathieu Lirzin <mthl@openmailbox.org>
-;;; Copyright © 2014 Deck Pickard <deck.r.pickard@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -39,7 +41,6 @@ (define-module (guix ui)
   #:use-module (srfi srfi-31)
   #:use-module (srfi srfi-34)
   #:use-module (srfi srfi-35)
-  #:use-module (srfi srfi-37)
   #:autoload   (ice-9 ftw)  (scandir)
   #:use-module (ice-9 match)
   #:use-module (ice-9 format)
@@ -79,8 +80,6 @@ (define-module (guix ui)
             package-specification->name+version+output
             string->generations
             string->duration
-            args-fold*
-            parse-command-line
             run-guix-command
             run-guix
             program-name
@@ -959,52 +958,6 @@ (define* (package-specification->name+version+output spec
 ;;; Command-line option processing.
 ;;;
 
-(define (args-fold* options unrecognized-option-proc operand-proc . seeds)
-  "A wrapper on top of `args-fold' that does proper user-facing error
-reporting."
-  (catch 'misc-error
-    (lambda ()
-      (apply args-fold options unrecognized-option-proc
-             operand-proc seeds))
-    (lambda (key proc msg args . rest)
-      ;; XXX: MSG is not i18n'd.
-      (leave (_ "invalid argument: ~a~%")
-             (apply format #f msg args)))))
-
-(define (environment-build-options)
-  "Return additional build options passed as environment variables."
-  (arguments-from-environment-variable "GUIX_BUILD_OPTIONS"))
-
-(define %default-argument-handler
-  ;; The default handler for non-option command-line arguments.
-  (lambda (arg result)
-    (alist-cons 'argument arg result)))
-
-(define* (parse-command-line args options seeds
-                             #:key
-                             (argument-handler %default-argument-handler))
-  "Parse the command-line arguments ARGS as well as arguments passed via the
-'GUIX_BUILD_OPTIONS' environment variable according to OPTIONS (a list of
-SRFI-37 options) and return the result, seeded by SEEDS.
-Command-line options take precedence those passed via 'GUIX_BUILD_OPTIONS'.
-
-ARGUMENT-HANDLER is called for non-option arguments, like the 'operand-proc'
-parameter of 'args-fold'."
-  (define (parse-options-from args seeds)
-    ;; Actual parsing takes place here.
-    (apply args-fold* args options
-           (lambda (opt name arg . rest)
-             (leave (_ "~A: unrecognized option~%") name))
-           argument-handler
-           seeds))
-
-  (call-with-values
-      (lambda ()
-        (parse-options-from (environment-build-options) seeds))
-    (lambda seeds
-      ;; ARGS take precedence over what the environment variable specifies.
-      (parse-options-from args seeds))))
-
 (define (show-guix-usage)
   (format (current-error-port)
           (_ "Try `guix --help' for more information.~%"))

po/guix/POTFILES.in

@@ -4,6 +4,7 @@ gnu/packages.scm
 gnu/system.scm
 gnu/services/dmd.scm
 gnu/system/shadow.scm
+guix/scripts.scm
 guix/scripts/build.scm
 guix/scripts/download.scm
 guix/scripts/package.scm

tests/scripts.scm

@@ -0,0 +1,72 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015 Ludovic Courtès <ludo@gnu.org>
+;;;
+;;; 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-scripts)
+  #:use-module (guix scripts)
+  #:use-module ((guix scripts build)
+                #:select (%standard-build-options))
+  #:use-module (srfi srfi-64))
+
+;; Test the (guix scripts) module.
+
+(define-syntax-rule (with-environment-variable variable value body ...)
+  "Run BODY with VARIABLE set to VALUE."
+  (let ((orig (getenv variable)))
+    (dynamic-wind
+      (lambda ()
+        (setenv variable value))
+      (lambda ()
+        body ...)
+      (lambda ()
+        (if orig
+            (setenv variable orig)
+            (unsetenv variable))))))
+
+
+(test-begin "scripts")
+
+(test-equal "parse-command-line"
+  '((argument . "bar") (argument . "foo")
+    (cores . 10)                                  ;takes precedence
+    (substitutes? . #f) (keep-failed? . #t)
+    (max-jobs . 77) (cores . 42))
+
+  (with-environment-variable "GUIX_BUILD_OPTIONS" "-c 42 -M 77"
+    (parse-command-line '("--keep-failed" "--no-substitutes"
+                          "--cores=10" "foo" "bar")
+                        %standard-build-options
+                        (list '()))))
+
+(test-equal "parse-command-line and --no options"
+  '((argument . "foo")
+    (substitutes? . #f))                          ;takes precedence
+
+  (with-environment-variable "GUIX_BUILD_OPTIONS" "--no-substitutes"
+    (parse-command-line '("foo")
+                        %standard-build-options
+                        (list '((substitutes? . #t))))))
+
+(test-end "scripts")
+
+
+(exit (= (test-runner-fail-count (test-runner-current)) 0))
+
+;;; Local Variables:
+;;; eval: (put 'with-environment-variable 'scheme-indent-function 2)
+;;; End:

tests/ui.scm

@@ -22,8 +22,6 @@ (define-module (test-ui)
   #:use-module (guix profiles)
   #:use-module (guix store)
   #:use-module (guix derivations)
-  #:use-module ((guix scripts build)
-                #:select (%standard-build-options))
   #:use-module (srfi srfi-1)
   #:use-module (srfi srfi-11)
   #:use-module (srfi srfi-19)
@@ -54,43 +52,9 @@ (define guile-2.0.9
     (item "/gnu/store/...")
     (output "out")))
 
-(define-syntax-rule (with-environment-variable variable value body ...)
-  "Run BODY with VARIABLE set to VALUE."
-  (let ((orig (getenv variable)))
-    (dynamic-wind
-      (lambda ()
-        (setenv variable value))
-      (lambda ()
-        body ...)
-      (lambda ()
-        (if orig
-            (setenv variable orig)
-            (unsetenv variable))))))
-
 
 (test-begin "ui")
 
-(test-equal "parse-command-line"
-  '((argument . "bar") (argument . "foo")
-    (cores . 10)                                  ;takes precedence
-    (substitutes? . #f) (keep-failed? . #t)
-    (max-jobs . 77) (cores . 42))
-
-  (with-environment-variable "GUIX_BUILD_OPTIONS" "-c 42 -M 77"
-    (parse-command-line '("--keep-failed" "--no-substitutes"
-                          "--cores=10" "foo" "bar")
-                        %standard-build-options
-                        (list '()))))
-
-(test-equal "parse-command-line and --no options"
-  '((argument . "foo")
-    (substitutes? . #f))                          ;takes precedence
-
-  (with-environment-variable "GUIX_BUILD_OPTIONS" "--no-substitutes"
-    (parse-command-line '("foo")
-                        %standard-build-options
-                        (list '((substitutes? . #t))))))
-
 (test-assert "fill-paragraph"
   (every (lambda (column)
            (every (lambda (width)
@@ -282,7 +246,3 @@ (define-syntax-rule (with-environment-variable variable value body ...)
 
 
 (exit (= (test-runner-fail-count (test-runner-current)) 0))
-
-;;; Local Variables:
-;;; eval: (put 'with-environment-variable 'scheme-indent-function 2)
-;;; End: