utils: Use '@' for separating package names and version numbers.

This provides the ability to use numbers in package names.

Fixes <http://bugs.gnu.org/19219>.

* guix/utils.scm (package-name->name+version): New procedure.
* gnu/packages.scm (%find-package): Add a FALLBACK? keyword argument.
Use the previous method when no package is found.
(specification->package+output, specification->package): Adapt
documentation to new syntax.
* doc/guix.texi (Invoking guix package, Invoking guix import): Likewise.
* guix/ui.scm (package-specification->name+version+output): Likewise.
* guix/scripts/import/hackage.scm (show-help): Likewise.
* tests/guix-build.sh: Adapt to new syntax.
* tests/guix-lint.sh: Likewise.
* tests/guix-package.sh: Likewise.
* tests/ui.scm ("package-specification->name+version+output"): Likewise.
* tests/utils.scm ("package-name->name+version"): Likewise.
* NEWS: Mention new syntax.

5 files changed, 11 insertions, 10 deletions

diff --git a/tests/guix-build.sh b/tests/guix-build.sh
index 778911b2f8..5821e509af 100644
--- a/tests/guix-build.sh
+++ b/tests/guix-build.sh
@@ -161,8 +161,8 @@ then false; else true; fi
 
 # Parsing package names and versions.
 guix build -n time		# PASS
-guix build -n time-1.7		# PASS, version found
-if guix build -n time-3.2;	# FAIL, version not found
+guix build -n time@1.7		# PASS, version found
+if guix build -n time@3.2;	# FAIL, version not found
 then false; else true; fi
 if guix build -n something-that-will-never-exist; # FAIL
 then false; else true; fi
diff --git a/tests/guix-lint.sh b/tests/guix-lint.sh
index 5015b5cfb5..c105521ec7 100644
--- a/tests/guix-lint.sh
+++ b/tests/guix-lint.sh
@@ -75,4 +75,4 @@ if guix lint -c synopsis,invalid-checker dummy 2>&1 | \
 then true; else false; fi
 
 # Make sure specifying multiple packages works.
-guix lint -c inputs-should-be-native dummy dummy-42 dummy
+guix lint -c inputs-should-be-native dummy dummy@42 dummy
diff --git a/tests/guix-package.sh b/tests/guix-package.sh
index d75008448b..28c34dbc6a 100644
--- a/tests/guix-package.sh
+++ b/tests/guix-package.sh
@@ -207,13 +207,13 @@ cat > "$module_dir/foo.scm"<<EOF
 EOF
 
 guix package -A emacs-foo-bar -L "$module_dir" | grep 42
-guix package -i emacs-foo-bar-42 -n -L "$module_dir"
+guix package -i emacs-foo-bar@42 -n -L "$module_dir"
 
 # Same thing using the 'GUIX_PACKAGE_PATH' environment variable.
 GUIX_PACKAGE_PATH="$module_dir"
 export GUIX_PACKAGE_PATH
 guix package -A emacs-foo-bar | grep 42
-guix package -i emacs-foo-bar-42 -n
+guix package -i emacs-foo-bar@42 -n
 
 # Make sure patches that live under $GUIX_PACKAGE_PATH are found.
 cat > "$module_dir/emacs.patch"<<EOF
diff --git a/tests/ui.scm b/tests/ui.scm
index bd4c907525..f28e623ccf 100644
--- a/tests/ui.scm
+++ b/tests/ui.scm
@@ -108,10 +108,10 @@ Second line" 24))
                (package-specification->name+version+output spec))
            list))
        '("guile"
-         "guile-2.0.9"
+         "guile@2.0.9"
          "guile:debug"
-         "guile-2.0.9:debug"
-         "guile-cairo-1.4.1")))
+         "guile@2.0.9:debug"
+         "guile-cairo@1.4.1")))
 
 (test-equal "integer"
   '(1)
diff --git a/tests/utils.scm b/tests/utils.scm
index a05faabc15..67b3724451 100644
--- a/tests/utils.scm
+++ b/tests/utils.scm
@@ -1,6 +1,7 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2012, 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2014 Eric Bavier <bavier@member.fsf.org>
+;;; Copyright © 2016 Mathieu Lirzin <mthl@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -59,14 +60,14 @@
           ((name version)
            (let*-values (((full-name)
                           (if version
-                              (string-append name "-" version)
+                              (string-append name "@" version)
                               name))
                          ((name* version*)
                           (package-name->name+version full-name)))
              (and (equal? name* name)
                   (equal? version* version)))))
          '(("foo" "0.9.1b")
-           ("foo-bar" "1.0")
+           ("foo-14-bar" "320")
            ("foo-bar2" #f)
            ("guile" "2.0.6.65-134c9") ; as produced by `git-version-gen'
            ("nixpkgs" "1.0pre22125_a28fe19")