guix build: Transformations operate on single objects.

* guix/scripts/build.scm (transform-package-source): Return a procedure
that expects a single object rather than a list of packages.
(options->transformation): Rewrite to precompute the list of applicable
transformations and to return a procedure that expects a single object
rather than a list of objects.
(options->derivations): Adjust accordingly.
* tests/scripts-build.scm: New file.
* Makefile.am (SCM_TESTS): Add it.

1 files changed, 65 insertions, 0 deletions

diff --git a/tests/scripts-build.scm b/tests/scripts-build.scm
new file mode 100644
index 0000000000..75dc119e88
--- /dev/null
+++ b/tests/scripts-build.scm
@@ -0,0 +1,65 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2016 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-build)
+  #:use-module (guix tests)
+  #:use-module (guix store)
+  #:use-module (guix packages)
+  #:use-module (guix scripts build)
+  #:use-module (guix ui)
+  #:use-module (srfi srfi-64))
+
+
+(test-begin "scripts-build")
+
+(test-assert "options->transformation, no transformations"
+  (let ((p (dummy-package "foo"))
+        (t (options->transformation '())))
+    (with-store store
+      (eq? (t store p) p))))
+
+(test-assert "options->transformation, with-source"
+  ;; Our pseudo-package is called 'guix.scm' so the 'guix.scm' source should
+  ;; be applicable.
+  (let* ((p (dummy-package "guix.scm"))
+         (s (search-path %load-path "guix.scm"))
+         (t (options->transformation `((with-source . ,s)))))
+    (with-store store
+      (let ((new (t store p)))
+        (and (not (eq? new p))
+             (string=? (package-source new)
+                       (add-to-store store "guix.scm" #t
+                                     "sha256" s)))))))
+
+(test-assert "options->transformation, with-source, no matches"
+  ;; When a transformation in not applicable, a warning must be raised.
+  (let* ((p (dummy-package "foobar"))
+         (s (search-path %load-path "guix.scm"))
+         (t (options->transformation `((with-source . ,s)))))
+    (with-store store
+      (let* ((port (open-output-string))
+             (new  (parameterize ((guix-warning-port port))
+                     (t store p))))
+        (and (eq? new p)
+             (string-contains (get-output-string port)
+                              "had no effect"))))))
+
+(test-end)
+
+
+(exit (= (test-runner-fail-count (test-runner-current)) 0))