Bundle licenses into wheels

Author: Rory Yorke

COPYING

@@ -1,3 +1,22 @@
+Copyright (c) 2002-2009 NICONET e.V.
+Copyright 2010-2011 Enrico Avventi
+Copyright (C) 2012-2026 Slycot team
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License version 2 as
+published by the Free Software Foundation.
+
+This program 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, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+MA 02110-1301, USA.
+
+
                     GNU GENERAL PUBLIC LICENSE
                        Version 2, June 1991
 
@@ -278,62 +297,3 @@ PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGES.
 
                      END OF TERMS AND CONDITIONS
-
-            How to Apply These Terms to Your New Programs
-
-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-convey the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
-
-    This program 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 2 of the License, or
-    (at your option) any later version.
-
-    This program 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, write to the Free Software Foundation, Inc.,
-    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-Also add information on how to contact you by electronic and paper mail.
-
-If the program is interactive, make it output a short notice like this
-when it starts in an interactive mode:
-
-    Gnomovision version 69, Copyright (C) year name of author
-    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, the commands you use may
-be called something other than `show w' and `show c'; they could even be
-mouse-clicks or menu items--whatever suits your program.
-
-You should also get your employer (if you work as a programmer) or your
-school, if any, to sign a "copyright disclaimer" for the program, if
-necessary.  Here is a sample; alter the names:
-
-  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
-  `Gnomovision' (which makes passes at compilers) written by James Hacker.
-
-  <signature of Ty Coon>, 1 April 1989
-  Ty Coon, President of Vice
-
-This General Public License does not permit incorporating your program into
-proprietary programs.  If your program is a subroutine library, you may
-consider it more useful to permit linking proprietary applications with the
-library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.

gpl-2.0.txt LICENSE.txtgpl-2.0.txt renamed to LICENSE.txt

@@ -10,6 +10,7 @@
 """
 
 import os
+import pathlib
 import shutil
 import subprocess
 import sys
@@ -44,11 +45,53 @@ def copy_libraries(project_root):
     shutil.copytree(src, dst)
 
 
+def copy_slicot_license(project_root):
+    inname = os.path.join(project_root, "slycot", "src", "SLICOT-Reference", "LICENSE")
+    outname = os.path.join(project_root, "LICENSE-SLICOT.txt")
+    print(f'Copying license file {inname} to {outname}')
+    shutil.copyfile(inname, outname)
+
+
+def copy_scipy_openblas32_licenses(project_root):
+    from importlib.metadata import metadata, files
+
+    outname0 = os.path.join(project_root, "LICENSE-scipy-openblas32.txt")
+    with open(outname0, "wt") as out:
+        print(f'Creating license file {outname0} from scipy-openblas32 license data')
+        out.write(metadata('scipy_openblas32')['License'])
+
+    license_files = [v
+                     for k, v in metadata('scipy_openblas32').items()
+                     if k=='License-File']
+    if len(set(pathlib.Path(p).name for p in license_files)) != len(license_files):
+        # distinguish by full path?
+        raise ValueError('license files with duplicate names not handled')
+
+    ilicense = 0
+    for license_file in license_files:
+        matches = [p for p in files('scipy_openblas32') if license_file in str(p)]
+        if len(matches) != 1:
+            raise ValueError(f'Expect 1 match for {license_file}, found {len(matches)}')
+        inname = matches[0].locate()
+        with open(inname) as infile:
+            data = infile.read()
+            if data == metadata('scipy_openblas32')['License']:
+                print(f'License file {inname} identical to license data, skipping')
+                continue
+
+        outname = os.path.join(project_root, f"LICENSE-scipy-openblas32-{ilicense}.txt")
+        print(f'Copying license file {inname} to {outname}')
+        shutil.copyfile(inname, outname)
+        ilicense += 1
+
+
 def main():
     version = sys.argv[1]
     project_root = sys.argv[2]
     install_openblas32(version)
     copy_libraries(project_root)
+    copy_slicot_license(project_root)
+    copy_scipy_openblas32_licenses(project_root)
 
 
 if __name__ == "__main__":

build-tools/cibw_before_build.py

@@ -9,7 +9,10 @@ description = "A wrapper for the SLICOT control and systems library"
 readme = "README.rst"
 authors = [{ name = "Enrico Avventi et al." }]
 maintainers = [{ name = "Slycot developers", email = "python-control-discuss@lists.sourceforge.net"}]
-license = "GPL-2.0 AND BSD-3-Clause"
+license = "GPL-2.0 AND BSD-3-Clause AND GPL-3.0-with-GCC-exception AND BSD-2-Clause"
+# the * is important: it allows adding SLICOT and OpenBLAS licenses when building wheels
+license-files = ["AUTHORS", "LICENSE*.txt"]
+
 classifiers = [
     "Development Status :: 4 - Beta",
     "Intended Audience :: Science/Research",