Added required changelog.sh for package creation via pkg build target

Author: trzy

Scripts/changelog.sh

@@ -0,0 +1,68 @@
+#!/bin/bash
+
+#
+# Supermodel
+# A Sega Model 3 Arcade Emulator.
+# Copyright 2003-2025 The Supermodel Team
+#
+# This file is part of Supermodel.
+#
+# Supermodel 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.
+#
+# Supermodel 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 Supermodel.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+#
+# changelog.sh
+#
+# Produces a change log (i.e., CHANGES.txt attached with each release). Takes a
+# single command line argument, which is the file path.
+#
+
+#!/bin/bash
+
+# Check if file path argument is provided
+if [ $# -ne 1 ]; then
+    echo "Error: Please provide a file path as an argument" >&2
+    echo "Usage: $0 <output_file_path>" >&2
+    exit 1
+fi
+
+OUTPUT_FILE="$1"
+FROM_REF=${FROM_REF:-06594a5}
+REF=${REF:-$(git rev-parse --short HEAD)}
+
+# Write header directly to output file
+cat <<EOF > "${OUTPUT_FILE}"
+
+  ####                                                      ###           ###
+ ##  ##                                                      ##            ##
+ ###     ##  ##  ## ###   ####   ## ###  ##  ##   ####       ##   ####     ##
+  ###    ##  ##   ##  ## ##  ##   ### ## ####### ##  ##   #####  ##  ##    ##
+    ###  ##  ##   ##  ## ######   ##  ## ####### ##  ##  ##  ##  ######    ##
+ ##  ##  ##  ##   #####  ##       ##     ## # ## ##  ##  ##  ##  ##        ##
+  ####    ### ##  ##      ####   ####    ##   ##  ####    ### ##  ####    ####
+                 ####
+
+                       A Sega Model 3 Arcade Emulator.
+
+                   Copyright 2003-2025 The Supermodel Team
+
+                                 CHANGE LOG
+
+EOF
+
+# Append git log directly to output file
+if ! git -c color.ui=never log ${FROM_REF}...${REF} --no-decorate --format=format:"Commit %h on %ad by %an%n%n%w(80,4,4)%B" --date=short >> "${OUTPUT_FILE}" ; then
+    echo "Unable to obtain Git log" >&2
+    exit 1
+fi