Migrate License field to SPDX identifiers

https://fedoraproject.org/wiki/Changes/SPDX_Licenses_Phase_2

Reviewed-by: Frédéric Bérat <fberat@redhat.com>

bison-license-check.sh

@@ -0,0 +1,108 @@
+#!/bin/bash
+
+# Run this in a bison source tree basedir to quickly guess the licensing
+# status of various bison source files. e.g. when using
+# glibc-maintainer-scripts for package maintenance, this means running it in
+# the bison-patches directory.
+# We use this because for some reason, fossology is unable to grok bison
+# sources for a license analysis.
+
+for f in $(find . -type f | grep -v '\.git/' | grep -v 'gnulib/'); do
+
+  if file $f | grep -q text; then # Hoping this is true iff the file is a text file
+
+    license="Unknown"
+
+    if head -n50 $f \
+       | grep -C50 -i "This.*file is free software; the Free Software Foundation" \
+       | grep -C50 -i "unlimited permission to copy and/or distribute it" \
+       | grep -C50 -i "with or without" \
+       | grep -qi "modifications, as long as this notice is preserved"; then
+       license="FSFULLR"
+    fi
+
+    if head -n50 $f \
+       | grep -C50 -i "This.*\(program\|file\) is free software" \
+       | grep -C50 -i "GNU General Public License" \
+       | grep -C50 -i "either version 2" \
+       | grep -qi "any later version"; then
+       license="GPL-2.0-or-later"
+    fi
+
+    if head -n50 $f \
+       | grep -C50 -i "This.*\(program\|file\) is free" \
+       | grep -C50 -i "GNU General Public License" \
+       | grep -C50 -i "either version 3" \
+       | grep -qi "any later version"; then
+       license="GPL-3.0-or-later"
+    fi
+
+    # Order of check for v2 and v2.1 is important here;
+    # "either version 2" will also match "either version 2.1"
+    if head -n50 $f \
+       | grep -C50 -i "This.*\(program\|file\) is free software" \
+       | grep -C50 -i "GNU Lesser General Public License" \
+       | grep -C50 -i "either version 2" \
+       | grep -qi "any later version"; then
+         license="LGPL-2.0-or-later"
+    fi
+
+    if head -n50 $f \
+       | grep -C50 -i "Th.* is free software" \
+       | grep -C50 -i "GNU Lesser General Public" \
+       | grep -C50 -i "License" \
+       | grep -C50 -i "either" \
+       | grep -C50 -i "version 2.1" \
+       | grep -qi "any later version"; then
+         license="LGPL-2.1-or-later"
+    fi
+
+    if head -n50 $f \
+       | grep -C50 -i "This.*\(program\|file\) is free software" \
+       | grep -C50 -i "GNU Lesser General Public License" \
+       | grep -C50 -i "either version 3" \
+       | grep -qi "any later version"; then
+         license="LGPL-3.0-or-later"
+    fi
+
+    if head -n50 $f \
+       | grep -C50 -i "Permission is granted" \
+       | grep -C50 -i "copy, distribute.*modify" \
+       | grep -C50 -i "GNU Free Documentation License" \
+       | grep -C50 -i "Version 1.3" \
+       | grep -qi "any later version"; then
+         license="GFDL-1.3-or-later"
+    fi
+
+    if head -n50 $f \
+       | grep -C50 -i "Permission is hereby granted, free of charge" \
+       | grep -C50 -i "to any person" \
+       | grep -C50 -i "the Software without restriction" \
+       | grep -C50 -i "use, copy, modify, merge, publish, distribute, sublicense" \
+       | grep -qi "X Consortium"; then
+       license="X11"
+    fi
+
+    if head -n50 $f \
+       | grep -C50 -i "This file is distributed under the same license as" \
+       | grep -qi "package"; then
+       license="Same-as-package-license"
+    fi
+
+    if head -n50 $f \
+       | grep -A20 -i "as .*exception" \
+       | grep -qi "2\.2 of bison"; then
+       license="$license WITH Bison-exception-2.2"
+    fi
+
+    if head -n50 $f \
+       | grep -A20 -i "as .*exception" \
+       | grep -A20 -i "distribute" \
+       | grep -A20 -i "generated by autoconf" \
+       | grep -qi "same distribution terms"; then
+       license="$license WITH Autoconf-exception-generic-3.0"
+    fi
+
+    echo $license "("$f")"
+  fi;
+done | sort

bison.spec

@@ -1,8 +1,12 @@
 Summary: A GNU general-purpose parser generator
 Name: bison
 Version: 3.8.2
-Release: 5%{?dist}
+Release: 6%{?dist}
-License: GPLv3+
+
+# An SPDX license string check done against bison-3.8.2 found strings
+# corresponding to the following licenses across the bison source tree:
+License: GPL-3.0-or-later AND GPL-3.0-or-later WITH Autoconf-exception-generic-3.0 AND GPL-3.0-or-later WITH Bison-exception-2.2 AND GPL-2.0-or-later AND GPL-2.0-or-later WITH Autoconf-exception-generic AND LGPL-3.0-or-later AND LGPL-2.1-or-later AND LGPL-2.0-or-later AND FSFULLR AND GFDL-1.3-or-later AND X11
+
 Source0: https://ftp.gnu.org/gnu/%{name}/%{name}-%{version}.tar.xz
 Source1: https://ftp.gnu.org/gnu/%{name}/%{name}-%{version}.tar.xz.sig
 # genereted from https://ftp.gnu.org/gnu/gnu-keyring.gpg via:
@@ -120,6 +124,12 @@ gzip -9nf ${RPM_BUILD_ROOT}%{_infodir}/bison.info*
 %{_libdir}/liby.a
 
 %changelog
+* Fri Sep  1 2023 Arjun Shankar <arjun@redhat.com> - 3.8.2-6
+- Analyse bison sources for license information
+- Migrate License field to SPDX identifiers for
+  https://fedoraproject.org/wiki/Changes/SPDX_Licenses_Phase_2
+  (#2222079)
+
 * Wed Jul 19 2023 Fedora Release Engineering <releng@fedoraproject.org> - 3.8.2-5
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild