package.sh: explicitly list files to include in the package

Reduce the number of files included in the packaged core by explicitly
listing the ones to include. This is achieved in two steps:

- common files and directories that are always included in the core
  archive are listed in 'extra/package.lst';

- board-specific files are automatically added by 'package.sh' using the
  variants defined in 'boards.txt'.

Author: pillo79

.github/workflows/package_core.yml

@@ -50,7 +50,6 @@ jobs:
       - name: Package
         run: |
           ./extra/package.sh ${{ env.CORE_TAG }}
-          mv ../${{ env.CORE_ARTIFACT }}.tar.bz2 .
 
       - name: Archive core
         uses: actions/upload-artifact@v4

.gitignore

@@ -1,3 +1,4 @@
 extra/post_build_tool/distrib/
 build/
 venv/
+ArduinoCore-zephyr-*.tar.bz2

extra/package.lst

@@ -0,0 +1,17 @@
+# This file contains all the *static* files and directories that will be added
+# to any core package archive.
+#
+# NOTE: board-specific entries in the 'firmwares/' and 'variants/' directories
+#       are automatically added by package.sh depending on the information in
+#       'boards.txt', so they should not be included here.
+
+boards.txt
+platform.txt
+programmers.txt
+LICENSE
+README.md
+doc/
+cores/
+libraries/
+variants/_llext/
+variants/_linked/

extra/package.sh

@@ -1,13 +1,31 @@
 #!/bin/bash
 
-if [ ! -f platform.txt ]; then
-  echo Launch this script from the root core folder as ./extras/package.sh VERSION
-  exit 2
+set -e
+
+if [ -z "$1" ]; then
+	echo "Usage: $0 VERSION"
+	exit 1
 fi
 
-FOLDER=`basename $PWD`
+if [ ! -f platform.txt ]; then
+	echo "Launch this script from the root core folder as ./extra/package.sh VERSION"
+	exit 2
+fi
 
+PACKAGE=ArduinoCore-zephyr
 VERSION=$1
 
-cd ..
-tar  --exclude=extras/** --exclude=.git* --exclude=build --exclude=venv --exclude=samples -cjhf ArduinoCore-zephyr-${VERSION}.tar.bz2 $FOLDER
+TEMP_LIST=$(mktemp)
+
+# import a basic list of files and directories
+cat extra/package.lst | sed -e 's/\s*#.*//' | grep -v '^\s*$' > ${TEMP_LIST}
+
+# add the board-specific files
+extra/get_board_details.sh | jq -cr '.[]' | while read -r item; do
+	variant=$(jq -cr '.variant' <<< "$item")
+	echo "variants/${variant}/" >> ${TEMP_LIST}
+	ls firmwares/zephyr-${variant}.* >> ${TEMP_LIST}
+done
+cat ${TEMP_LIST}
+tar -cjhf ${PACKAGE}-${VERSION}.tar.bz2 -T ${TEMP_LIST} --transform "s,^,${PACKAGE}/,"
+rm -f ${TEMP_LIST}