Open source the Firebase build tools

.github/workflows/create-releases-buildtools.yml

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+name:  Create release (build tools)
+
+on:
+  workflow_dispatch:
+    inputs:
+      product:
+        description: Which product to make a release of ?
+        required: true
+        type: choice
+        options:
+          - app-distribution
+          - crashlytics
+          - performance
+
+permissions:
+  contents: read
+
+env:
+  ARTIFACTS: ${{ github.workspace }}/build/artifacts
+
+jobs:
+  make-app-distribution-release:
+    runs-on: ubuntu-latest
+    if: inputs.product == 'app-distribution'
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Set up JDK 17
+        uses: actions/setup-java@3a4f6e1af504cf6a31855fa899c6aa5355ba6c12 # v4.7.0
+        with:
+          java-version: 17
+          distribution: temurin
+          cache: gradle
+      - name: Make release for Firebase App Distribution
+        run: |
+          ./gradlew \
+            -Dorg.gradle.project.buildDir=${ARTIFACTS} \
+            -Dmaven.repo.local=${ARTIFACTS} \
+            :firebase-appdistribution-gradle:publishToMavenLocal
+          cd ${ARTIFACTS}
+          zip -r m2repository.zip com
+      - uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
+        with:
+          name: artifacts
+          path: ${{ env.ARTIFACTS }}
+
+  make-crashlytics-release:
+    runs-on: ubuntu-latest
+    if: inputs.product == 'crashlytics'
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Set up JDK 17
+        uses: actions/setup-java@3a4f6e1af504cf6a31855fa899c6aa5355ba6c12 # v4.7.0
+        with:
+          java-version: 17
+          distribution: temurin
+          cache: gradle
+      - name: Make release for Firebase Crashlytics
+        run: |
+          ./gradlew \
+            -Dorg.gradle.project.buildDir=${ARTIFACTS} \
+            -Dmaven.repo.local=${ARTIFACTS} \
+            :firebase-crashlytics-buildtools:publishToMavenLocal
+          ./gradlew \
+            -Dorg.gradle.project.buildDir=${ARTIFACTS} \
+            -Dmaven.repo.local=${ARTIFACTS} \
+            :firebase-crashlytics-gradle:publishToMavenLocal
+          cd ${ARTIFACTS}
+          zip -r m2repository.zip com
+      - uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
+        with:
+          name: artifacts
+          path: ${{ env.ARTIFACTS }}
+
+  make-performance-release:
+    runs-on: ubuntu-latest
+    if: inputs.product == 'performance'
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Set up JDK 17
+        uses: actions/setup-java@3a4f6e1af504cf6a31855fa899c6aa5355ba6c12 # v4.7.0
+        with:
+          java-version: 17
+          distribution: temurin
+          cache: gradle
+      - name: Make release for Firebase Performance
+        run: |
+          ./gradlew \
+            -Dorg.gradle.project.buildDir=${ARTIFACTS} \
+            -Dmaven.repo.local=${ARTIFACTS} \
+            :firebase-perf-gradle:publishToMavenLocal
+          cd ${ARTIFACTS}
+          zip -r m2repository.zip com
+      - uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
+        with:
+          name: artifacts
+          path: ${{ env.ARTIFACTS }}

.github/workflows/perf-gradle-compatibility-tests.yml

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+name: Perf Gradle Compatibility Tests
+
+on:
+  schedule:
+    - cron: '0 6 * * *' # Run daily at 6 AM
+  workflow_dispatch: # Allow manual triggering
+
+permissions:
+  contents: read
+
+jobs:
+  performance-plugin:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Set up JDK 17
+        uses: actions/setup-java@3a4f6e1af504cf6a31855fa899c6aa5355ba6c12 # v4.7.0
+        with:
+          java-version: 17
+          distribution: temurin
+          cache: gradle
+      - name: Run tests
+        id: tests
+        run: |
+          ./gradlew \
+          :firebase-perf-gradle:test --tests \
+          "com.google.firebase.perf.plugin.transform.InstrumentationApiCompatTest.gradleBuildRunsInstrumentationForAllVariants_latestGradleAndAgp"

firebase-appdistribution-gradle/CHANGELOG.md

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+### App Distribution Gradle plugin version 5.2.1
+
+* {{fixed}} Declare dependency on GoogleServices plugin
+

firebase-appdistribution-gradle/README.md

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+# App Distribution Gradle Plugin
+
+This directory contains the source code for the
+[Firebase App Distribution Gradle Plugin](https://firebase.google.com/docs/app-distribution/android/distribute-gradle),
+which allows uploading distributions, enabling access for testers, and adding release notes.
+
+---
+
+## appdistribution-gradle
+
+This subproject produces a Gradle Plugin which faciliates the use cases of
+appdistribution-buildtools for Android apps built with Gradle.
+
+#### Build / Install
+
+`./gradlew :firebase-appdistribution-gradle:publishToMavenLocal`
+
+The produced local Maven artifact is "com.google.firebase:firebase-appdistribution-gradle".
+
+#### Test
+
+To run unit tests, run:
+
+`./gradlew :firebase-appdistribution-gradle:test`
+
+To run integration tests, run:
+
+`./gradlew :firebase-appdistribution-gradle:integrationTest`
+
+To test manually, add the plugin to your Android project
+
+`apply plugin: 'com.google.firebase.appdistribution'`
+
+## Release Process
+
+1. Create a PR with the changes, and request a review to submit it to `main`. Add the changes in the
+   `CHANGELOG.md`.
+2. Once the changes have been submitted to `main` they will be released along with the next Android
+   SDK release.
+
+### Building the Maven artifact
+
+Make sure to bump the [version of the plugin](gradle.properties#L3).
+
+Use the
+["Make Releases" GitHub Actions workflow](https://github.com/firebase/firebase-android-buildtools/actions/workflows/make-releases.yml)
+([source](../.github/workflows/make-releases.yml)) to produce maven artifacts. Please refer to the
+[GitHub Actions documentation](https://docs.github.com/en/actions/managing-workflow-runs/manually-running-a-workflow)
+on how to trigger the workflow manually. The `m2repository.zip` can be downloaded from the
+"Artifacts" section on the workflow execution page.
+
+### Testing the artifact (optional)
+
+Download the `m2repository.zip` artifact from GCS. Extract the contents of the zip file to a local
+directory. In the project-level Gradle file of a test app add the path to the local maven
+repository to the `repositories` block and
+`classpath 'com.google.firebase:firebase-appdistribution-gradle:x.y.z'`
+to the dependencies block.
+
+```
+    repositories {
+        // ...
+
+        // Add path to gradle plugin local maven repository
+        maven {
+            url 'file://<path_to_gradle_plugin_maven_repo>'
+        }
+    }
+    dependencies {
+        // ...
+
+        // Add the pre version of the Gradle plugin
+        classpath 'com.google.firebase:firebase-appdistribution-gradle:x.y.z'
+    }
+```
+
+Sync your project and validate by running an app distribution gradle
+command such as:
+
+```
+./gradlew assembleDebug appDistributionUploadDebug
+```
+