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-rw-r--r--emacs/guix-license.el44
-rw-r--r--emacs/guix-main.scm30
-rw-r--r--emacs/guix-read.el11
3 files changed, 84 insertions, 1 deletions
diff --git a/emacs/guix-license.el b/emacs/guix-license.el
new file mode 100644
index 0000000000..940f5518e2
--- /dev/null
+++ b/emacs/guix-license.el
@@ -0,0 +1,44 @@
+;;; guix-license.el --- Licenses
+
+;; Copyright © 2016 Alex Kost <alezost@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 this program. If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This file provides the code to work with licenses of Guix packages.
+
+;;; Code:
+
+(require 'guix-read)
+(require 'guix-backend)
+(require 'guix-guile)
+
+(defun guix-lookup-license-url (license)
+ "Return URL of a LICENSE."
+ (or (guix-eval-read (guix-make-guile-expression
+ 'lookup-license-uri license))
+ (error "Hm, I don't know URL of '%s' license" license)))
+
+;;;###autoload
+(defun guix-browse-license-url (license)
+ "Browse URL of a LICENSE."
+ (interactive (list (guix-read-license-name)))
+ (browse-url (guix-lookup-license-url license)))
+
+(provide 'guix-license)
+
+;;; guix-license.el ends here
diff --git a/emacs/guix-main.scm b/emacs/guix-main.scm
index 236c882e3c..0aee206a15 100644
--- a/emacs/guix-main.scm
+++ b/emacs/guix-main.scm
@@ -1042,3 +1042,33 @@ Return #t if the shell command was executed successfully."
;; See the comment to 'guix-package-names' function in "guix-popup.el".
(define (package-names-lists)
(map list (package-names)))
+
+
+;;; Licenses
+
+(define %licenses
+ (delay
+ (filter license?
+ (module-map (lambda (_ var)
+ (variable-ref var))
+ (resolve-interface '(guix licenses))))))
+
+(define (licenses)
+ (force %licenses))
+
+(define (license-names)
+ "Return a list of names of available licenses."
+ (map license-name (licenses)))
+
+(define lookup-license
+ (memoize
+ (lambda (name)
+ "Return a license by its name."
+ (find (lambda (l)
+ (string=? name (license-name l)))
+ (licenses)))))
+
+(define (lookup-license-uri name)
+ "Return a license URI by its name."
+ (and=> (lookup-license name)
+ license-uri))
diff --git a/emacs/guix-read.el b/emacs/guix-read.el
index 3bc7b16587..a1a6b86364 100644
--- a/emacs/guix-read.el
+++ b/emacs/guix-read.el
@@ -1,6 +1,6 @@
;;; guix-read.el --- Minibuffer readers
-;; Copyright © 2015 Alex Kost <alezost@gmail.com>
+;; Copyright © 2015, 2016 Alex Kost <alezost@gmail.com>
;; This file is part of GNU Guix.
@@ -58,6 +58,10 @@
'package-names-lists)))
#'string<))
+(guix-memoized-defun guix-license-names ()
+ "Return a list of names of available licenses."
+ (guix-eval-read (guix-make-guile-expression 'license-names)))
+
;;; Readers
@@ -122,6 +126,11 @@
:multiple-prompt "Package,s: "
:multiple-separator " ")
+(guix-define-readers
+ :completions-getter guix-license-names
+ :single-reader guix-read-license-name
+ :single-prompt "License: ")
+
(provide 'guix-read)
;;; guix-read.el ends here