ci: Revamp Android SDK cache, and update it timely

Author: hebasto

.cirrus.yml

@@ -51,10 +51,6 @@ global_task_template: &GLOBAL_TASK_TEMPLATE
   << : *BASE_TEMPLATE
   << : *MAIN_TEMPLATE
 
-depends_sdk_cache_template: &DEPENDS_SDK_CACHE_TEMPLATE
-  depends_sdk_cache:
-    folder: "depends/sdk-sources"
-
 compute_credits_template: &CREDITS_TEMPLATE
   # https://cirrus-ci.org/pricing/#compute-credits
   # Only use credits for pull requests to the main repo
@@ -300,8 +296,10 @@ task:
 
 task:
   name: 'ARM64 Android APK [focal]'
-  << : *DEPENDS_SDK_CACHE_TEMPLATE
   << : *BASE_TEMPLATE
+  android_sdk_cache:
+    folder: "depends/SDKs/android"
+    fingerprint_key: "ANDROID_API_LEVEL=28 ANDROID_BUILD_TOOLS_VERSION=28.0.3 ANDROID_NDK_VERSION=22.1.7171670"
   depends_sources_cache:
     folder: "depends/sources"
     fingerprint_script: git rev-list -1 HEAD ./depends

ci/test/05_before_script.sh

@@ -26,10 +26,11 @@ if [ -n "$XCODE_VERSION" ] && [ ! -d "${DEPENDS_DIR}/SDKs/${OSX_SDK_BASENAME}" ]
   DOCKER_EXEC tar -C "${DEPENDS_DIR}/SDKs" -xf "$OSX_SDK_PATH"
 fi
 
-if [ -n "$ANDROID_TOOLS_URL" ]; then
-  ANDROID_TOOLS_PATH=$DEPENDS_DIR/sdk-sources/android-tools.zip
-
-  DOCKER_EXEC curl --location --fail "${ANDROID_TOOLS_URL}" -o "$ANDROID_TOOLS_PATH"
+if [ -n "$ANDROID_HOME" ] && [ ! -d "$ANDROID_HOME" ]; then
+  ANDROID_TOOLS_PATH=${DEPENDS_DIR}/sdk-sources/android-tools.zip
+  if [ ! -f "$ANDROID_TOOLS_PATH" ]; then
+    DOCKER_EXEC curl --location --fail "${ANDROID_TOOLS_URL}" -o "$ANDROID_TOOLS_PATH"
+  fi
   DOCKER_EXEC mkdir -p "${ANDROID_HOME}/cmdline-tools"
   DOCKER_EXEC unzip -o "$ANDROID_TOOLS_PATH" -d "${ANDROID_HOME}/cmdline-tools"
   DOCKER_EXEC "yes | ${ANDROID_HOME}/cmdline-tools/tools/bin/sdkmanager --install \"build-tools;${ANDROID_BUILD_TOOLS_VERSION}\" \"platform-tools\" \"platforms;android-${ANDROID_API_LEVEL}\" \"ndk;${ANDROID_NDK_VERSION}\""