action: set CCACHE_DIR and CCACHE_IGNOREOPTIONS in environment

Prepare for using ccache by setting up CCACHE_DIR and
CCACHE_IGNOREOPTIONS in the GitHub environment file.

Signed-off-by: Henrik Brix Andersen <henrik@brixandersen.dk>

Author: henrikbrixandersen

action.yml

@@ -121,16 +121,19 @@ runs:
 
         if [ "${{ runner.os }}" = "Linux" ]; then
           pip_cache_path="~/.cache/pip"
+          ccache_path="~/.cache/ccache"
           sdk_ext="tar.xz"
           setup_file="./setup.sh"
           setup_opt="-"
         elif [ "${{ runner.os }}" = "macOS" ]; then
           pip_cache_path="~/Library/Caches/pip"
+          ccache_path="~/Library/Caches/ccache"
           sdk_ext="tar.xz"
           setup_file="./setup.sh"
           setup_opt="-"
         elif [ "${{ runner.os }}" = "Windows" ]; then
           pip_cache_path="~\AppData\Local\pip\Cache"
+          ccache_path="~\AppData\Local\ccache\Cache"
           sdk_ext="7z"
           setup_file="./setup.cmd"
           setup_opt="//"
@@ -156,6 +159,8 @@ runs:
         echo "SDK_VERSION=${sdk_version}" >> $GITHUB_ENV
         echo "SDK_FILE=zephyr-sdk-${sdk_version}_${sdk_variant}_minimal.${sdk_ext}" >> $GITHUB_ENV
         echo "PIP_CACHE_PATH=${pip_cache_path}" >> $GITHUB_ENV
+        echo "CCACHE_DIR=${ccache_path}" >> $GITHUB_ENV
+        echo "CCACHE_IGNOREOPTIONS='-specs=* --specs=*'" >> $GITHUB_ENV
         echo "SETUP_FILE=${setup_file}" >> $GITHUB_ENV
         echo "SETUP_OPT=${setup_opt}" >> $GITHUB_ENV