Cache JAR

Author: adunning

action.yml

@@ -88,12 +88,19 @@ runs:
         key: xml-model-validator-runtime-${{ runner.os }}-${{ github.run_id }}-${{ github.run_attempt }}
         restore-keys: |
           xml-model-validator-runtime-${{ runner.os }}-
+    - name: Restore Validator JAR Cache
+      id: restore-jar-cache
+      uses: actions/cache/restore@v5
+      with:
+        path: ~/.cache/xml-model-validator/jar
+        key: xml-model-validator-jar-${{ runner.os }}-${{ github.action_sha }}
     - name: Set Up Java
       uses: actions/setup-java@v5
       with:
         distribution: temurin
         java-version: "25"
     - name: Set Up Gradle
+      if: steps.restore-jar-cache.outputs.cache-hit != 'true'
       uses: gradle/actions/setup-gradle@v6
     - name: Validate XML
       id: validate
@@ -121,6 +128,12 @@ runs:
       run: |
         set -euo pipefail
         bash "${{ github.action_path }}/entrypoint.sh"
+    - name: Save Validator JAR Cache
+      if: always() && steps.restore-jar-cache.outputs.cache-hit != 'true'
+      uses: actions/cache/save@v5
+      with:
+        path: ~/.cache/xml-model-validator/jar
+        key: xml-model-validator-jar-${{ runner.os }}-${{ github.action_sha }}
     - name: Save Validator Runtime Cache
       if: always() && steps.restore-runtime-cache.outputs.cache-hit != 'true'
       uses: actions/cache/save@v5

entrypoint.sh

@@ -23,6 +23,17 @@ build_validator_jar() {
   cp "${ACTION_ROOT}/build/libs/xml-model-validator.jar" "${JAR_PATH}"
 }
 
+download_validator_jar() {
+  if [ -z "${GITHUB_ACTION_REF:-}" ] || [ -z "${GITHUB_ACTION_REPOSITORY:-}" ]; then
+    return 1
+  fi
+  gh release download "${GITHUB_ACTION_REF}" \
+    --repo "${GITHUB_ACTION_REPOSITORY}" \
+    --pattern "xml-model-validator.jar" \
+    --dir "${JAR_CACHE_DIR}" \
+    --clobber 2>/dev/null
+}
+
 ensure_git_history() {
   if [ "$(git rev-parse --is-shallow-repository 2>/dev/null || printf 'false')" = "true" ]; then
     git fetch --no-tags --prune --unshallow origin >/dev/null 2>&1 || true
@@ -420,7 +431,11 @@ else
 fi
 
 if [ ! -f "${JAR_PATH}" ]; then
-  build_validator_jar
+  if download_validator_jar; then
+    echo "XML Model Validator: downloaded pre-built JAR for ${GITHUB_ACTION_REF:-unknown}." >&2
+  else
+    build_validator_jar
+  fi
 fi
 
 set +e