make same-license requirement, add to all copyleft licenses

README.md

@@ -84,6 +84,7 @@ The license properties (rules) are stored as a bulleted list within the licenses
 * `disclose-source` - Source code must be made available when distributing the software.
 * `network-use-disclose` - Users who interact with the software via network are given the right to receive a copy of the corresponding source code.
 * `rename` - You must change the name of the software if you modify it.
+* `same-license` - Modifications must be released under the same license when distributing the software. In some cases a similar or related license may be used.
 
 #### Permitted
 

_data/rules.yml

@@ -14,6 +14,9 @@ required:
 - description: You must change the name of the software if you modify it.
   label: Rename
   tag: rename
+- description: Modifications must be released under the same license when distributing the software. In some cases a similar or related license may be used.
+  label: Same License
+  tag: same-license
 
 permitted:
 - description: This software and derivatives may be used for commercial purposes.

_licenses/agpl-3.0.html

@@ -18,6 +18,7 @@ required:
   - document-changes
   - disclose-source
   - network-use-disclose
+  - same-license
 
 permitted:
   - commercial-use

_licenses/epl-1.0.html

@@ -18,6 +18,7 @@ using:
 required:
   - disclose-source
   - include-copyright
+  - same-license
 
 permitted:
   - commercial-use

_licenses/eupl-1.1.html

@@ -18,6 +18,7 @@ required:
   - disclose-source
   - document-changes
   - network-use-disclose
+  - same-license
 
 permitted:
   - commercial-use
@@ -70,7 +71,7 @@ the works or software that could be created by the Licensee, based upon the
 Original Work or modifications thereof. This Licence does not define the
 extent of modification or dependence on the Original Work required in order to
 classify a work as a Derivative Work; this extent is determined by copyright
-law applicable in the country mentioned in Article 15. 
+law applicable in the country mentioned in Article 15.
 
 - The Work: the Original Work and/or its Derivative Works.
 
@@ -175,7 +176,7 @@ the terms of this Compatible Licence. For the sake of this clause,
 “Compatible Licence” refers to the licences listed in the appendix
 attached to this Licence. Should the Licensee’s obligations under the
 Compatible Licence conflict with his/her obligations under this Licence, the
-obligations of the Compatible Licence shall prevail. 
+obligations of the Compatible Licence shall prevail.
 
 Provision of Source Code:
 When distributing and/or communicating copies of the Work, the Licensee
@@ -260,7 +261,7 @@ Similarly, you irrevocably accept this Licence and
 all of its terms and conditions by exercising any rights granted to You
 by Article 2 of this Licence, such as the use of the Work,
 the creation by You of a Derivative Work or the Distribution and/or
-Communication by You of the Work or copies thereof. 
+Communication by You of the Work or copies thereof.
 
 
 11. Information to the public
@@ -328,7 +329,7 @@ This licence shall be governed by the Belgian law if:
 - a litigation arises between the European Commission, as a Licensor, and any
 Licensee;
 - the Licensor, other than the European Commission, has no residence or
-registered office inside a European Union country. 
+registered office inside a European Union country.
 
 
 ===

_licenses/gpl-2.0.html

@@ -17,6 +17,7 @@ required:
   - include-copyright
   - document-changes
   - disclose-source
+  - same-license
 
 permitted:
   - commercial-use

_licenses/gpl-3.0.html

@@ -17,6 +17,7 @@ required:
   - include-copyright
   - document-changes
   - disclose-source
+  - same-license
 
 permitted:
   - commercial-use

_licenses/lgpl-2.1.html

@@ -16,6 +16,7 @@ note: The Free Software Foundation recommends taking the additional step of addi
 required:
   - include-copyright
   - disclose-source
+  - same-license
 
 permitted:
   - commercial-use

_licenses/lgpl-3.0.html

@@ -15,6 +15,8 @@ note: The Free Software Foundation recommends taking the additional step of addi
 required:
   - include-copyright
   - disclose-source
+  - same-license
+
 
 permitted:
   - commercial-use

_licenses/mpl-2.0.html

@@ -10,6 +10,7 @@ how: Create a text file (typically named LICENSE or LICENSE.txt) in the root of
 required:
   - disclose-source
   - include-copyright
+  - same-license
 
 permitted:
   - commercial-use

_licenses/ms-rl.html

@@ -9,6 +9,7 @@ how: Create a text file (typically named LICENSE or LICENSE.txt) in the root of
 
 required:
   - include-copyright
+  - same-license
 
 permitted:
   - commercial-use

_licenses/ofl-1.1.html

@@ -11,6 +11,7 @@ note: This license doesn't require source provision, but recommends it. All file
 
 required:
   - include-copyright
+  - same-license
 
 permitted:
   - private-use

_licenses/osl-3.0.html

@@ -18,6 +18,7 @@ using:
 required:
   - include-copyright
   - disclose-source
+  - same-license
 
 permitted:
   - commercial-use