Android Gradle Wrapper

Run Android work from android/ via the Gradle wrapper. Never run Gradle tasks from the repo root.

Prerequisites

• A new worktree needs android/local.properties copied from a working checkout. It is gitignored and Gradle cannot resolve the SDK without it. Never commit it.
• Never read or print ~/.gradle/gradle.properties; it holds publishing credentials.

Running tasks

• Default: bash scripts/android/gradlew_task.sh <task> [flags]. It works from any cwd, runs ./gradlew from android/ with the arguments unchanged, and returns Gradle's exit code. Combined stdout and stderr are shown and saved to scratch/gradlew-<UTC timestamp>-<pid>.log; the log path is printed to stderr before and after the run. -h or --help as the first argument prints usage.
• Modes:
  • Plain (when build-brief is absent, CI is non-empty, or AUTOMOBILE_GRADLEW_NO_BUILD_BRIEF is non-empty): as above, full log shown and tee'd to scratch/.
  • build-brief (when build-brief is on PATH, CI is unset/empty and the opt-out is unset/empty): runs build-brief -- <args> from android/ with BUILD_BRIEF_LOG_DIR=<repo>/scratch. Only build-brief's summary reaches stdout (it prints the raw log path on failure); the wrapper adds no tee and, on a non-zero exit, prints the log directory to stderr. Exit code is Gradle's.
  • Opt out with AUTOMOBILE_GRADLEW_NO_BUILD_BRIEF=1 when you need the full Gradle output.
• build-brief is optional and third-party. The owner installs it with Homebrew, pinned: brew install static-var/tap/build-brief (pinned version: <VERSION - owner fills in after installing>). Never use a curl | bash installer; agents must not install it.
• Equivalent without the script: (cd android && ./gradlew <task>).
• Use module-scoped tasks that match the request, for example :junit-runner:test, :playground:app:test or :auto-mobile-sdk:apiDump.
• To reproduce CI's Detekt job run the type-resolved detektMain detektTest; a per-module :module:detekt run does not reproduce it.
• Write long output to scratch/ (the script already does) and read excerpts instead of pasting full logs.

Related skills

• prepush-android for the fast pre-push smoke check (scripts/prepush-android.sh).
• validate and test for broader lint, build and test runs.
• check-ci for exact-head CI logs and artifacts.

Treat this as a building-block skill for those, not as the primary workflow when the user asks for a broader task.