[bug#48702] [PATCH v4 1/3] licenses: Add Expat No Attribution license.

[Kyle Meyer <kyle@kyleam.com>]

* guix/licenses.scm (expat-0): New variable.
* guix/import/utils.scm (spdx-string->license): Add MIT-0.
---
 guix/import/utils.scm |  2 ++
 guix/licenses.scm     | 10 +++++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/guix/import/utils.scm b/guix/import/utils.scm
index a180742ca3..02ddb6783e 100644
--- a/guix/import/utils.scm
+++ b/guix/import/utils.scm
@@ -9,6 +9,7 @@
 ;;; Copyright © 2020 Martin Becze <mjbecze@riseup.net>
 ;;; Copyright © 2021 Maxim Cournoyer <maxim.cournoyer@gmail.com>
 ;;; Copyright © 2021 Sarah Morgensen <iskarian@mgsn.dev>
+;;; Copyright © 2021 Kyle Meyer <kyle@kyleam.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -162,6 +163,7 @@ (define (spdx-string->license str)
     ("CPL-1.0"                     'license:cpl1.0)
     ("EPL-1.0"                     'license:epl1.0)
     ("MIT"                         'license:expat)
+    ("MIT-0"                       'license:expat-0)
     ("FTL"                         'license:freetype)
     ("GFDL-1.1"                    'license:fdl1.1+)
     ("GFDL-1.2"                    'license:fdl1.2+)
diff --git a/guix/licenses.scm b/guix/licenses.scm
index c071aae4a9..fc4077fc85 100644
--- a/guix/licenses.scm
+++ b/guix/licenses.scm
@@ -19,6 +19,7 @@
 ;;; Copyright © 2021 Felix Gruber <felgru@posteo.net>
 ;;; Copyright © 2021 Xinglu Chen <public@yoctocell.xyz>
 ;;; Copyright © 2021 Noisytoot <noisytoot@disroot.org>
+;;; Copyright © 2021 Kyle Meyer <kyle@kyleam.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -57,7 +58,7 @@ (define-module (guix licenses)
             epl1.0
             epl2.0
             eupl1.2
-            expat
+            expat expat-0
             freetype
             freebsd-doc
             giftware
@@ -313,6 +314,13 @@ (define expat
            "http://directory.fsf.org/wiki/License:Expat"
            "https://www.gnu.org/licenses/license-list.html#Expat"))
 
+(define expat-0
+  (license "Expat No Attribution"
+           ;; Note: There is a later formulation of the same license at
+           ;; <https://github.com/aws/mit-0>.
+           "https://romanrm.net/mit-zero"
+           "Expat license with the attribution paragraph removed."))
+
 (define freetype
   (license "Freetype"
            "http://directory.fsf.org/wiki/License:Freetype"
-- 
2.33.0