ci: Add caching of ccache for Zephyr.

Similar to the ESP32 builds, but needs additional step to pass the ccache directory through to the Zephyr container. This work was funded through GitHub Sponsors. Signed-off-by: Angus Gratton <[email protected]>
IhorNehrutsa · Dec 18, 2024 · a9945fc · a9945fc
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diff --git a/.github/workflows/ports_zephyr.yml b/.github/workflows/ports_zephyr.yml
@@ -42,6 +42,10 @@ jobs:
         # cache the "workspace"
         path: ./zephyrproject
         key: zephyr-workspace-${{ steps.versions.outputs.ZEPHYR }}
+    - name: ccache
+      uses: hendrikmuhs/[email protected]
+      with:
+        key: zephyr
     - name: Install packages
       run: source tools/ci.sh && ci_zephyr_setup
     - name: Install Zephyr

diff --git a/tools/ci.sh b/tools/ci.sh
@@ -754,12 +754,15 @@ function ci_zephyr_setup {
     # Directories cached by GitHub Actions, mounted
     # into the container
     ZEPHYRPROJECT_DIR="$(pwd)/zephyrproject"
+    CCACHE_DIR="$(pwd)/.ccache"
 
     mkdir -p "${ZEPHYRPROJECT_DIR}"
+    mkdir -p "${CCACHE_DIR}"
 
     docker run --name zephyr-ci -d -it \
       -v "$(pwd)":/micropython \
       -v "${ZEPHYRPROJECT_DIR}":/zephyrproject \
+      -v "${CCACHE_DIR}":/root/.cache/ccache \
       -e ZEPHYR_SDK_INSTALL_DIR=/opt/toolchains/zephyr-sdk-${ZEPHYR_SDK_VERSION} \
       -e ZEPHYR_TOOLCHAIN_VARIANT=zephyr \
       -e ZEPHYR_BASE=/zephyrproject/zephyr \