chore: add Kokoro release config and script for OSS Exit Gate

.kokoro/release.cfg

@@ -0,0 +1,13 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+build_file: "github/googleads-java-lib/.kokoro/release.sh"
+
+# Default to DRY_RUN=true for safety; can be overridden via API or UI
+env_vars: {
+  key: "DRY_RUN"
+  value: "true"
+}
+
+container_properties {
+  docker_image: "us-central1-docker.pkg.dev/kokoro-container-bakery/kokoro/ubuntu/ubuntu2204/full:current"
+}

.kokoro/release.sh

@@ -0,0 +1,129 @@
+#!/bin/bash
+set -euo pipefail
+
+# ==============================================================================
+# SECURITY NOTICE: DO NOT ADD 'set -x' TO THIS SCRIPT!
+# This script handles PGP signing keys and passphrases from Secret Manager.
+# ==============================================================================
+set +x
+
+DRY_RUN="${DRY_RUN:-true}"
+if [[ "${DRY_RUN}" != "true" && "${DRY_RUN}" != "false" ]]; then
+  echo "ERROR: DRY_RUN must be 'true' or 'false' (got '${DRY_RUN}')." >&2
+  exit 1
+fi
+
+REPO_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+cd "${REPO_DIR}"
+
+echo "=== Building and Releasing from: ${REPO_DIR} (DRY_RUN=${DRY_RUN}) ==="
+
+if [[ ! -d "/usr/lib/jvm/java-17-openjdk-amd64" ]]; then
+  echo "ERROR: Kokoro worker missing expected OpenJDK 17 at /usr/lib/jvm/java-17-openjdk-amd64" >&2
+  exit 1
+fi
+export PATH="/usr/lib/jvm/java-17-openjdk-amd64/bin:${PATH}"
+unset JAVA_HOME
+
+EXIT_GATE_PROJECT="oss-exit-gate-prod"
+EXIT_GATE_LOCATION="us"
+EXIT_GATE_REPOSITORY="googleads-java-lib--mavencentral"
+
+PACKAGES=(
+  "client-libs-parent"
+  "ads-lib"
+  "ads-lib-appengine"
+  "ads-lib-axis"
+  "dfp-appengine"
+  "dfp-axis"
+)
+
+for pkg in "${PACKAGES[@]}"; do
+  full_pkg="com.google.api-ads:${pkg}"
+  if gcloud artifacts packages describe "${full_pkg}" \
+      --project="${EXIT_GATE_PROJECT}" \
+      --location="${EXIT_GATE_LOCATION}" \
+      --repository="${EXIT_GATE_REPOSITORY}" &>/dev/null; then
+    echo "=== Deleting existing package '${full_pkg}' from Exit Gate staging repository ==="
+    gcloud artifacts packages delete "${full_pkg}" \
+      --project="${EXIT_GATE_PROJECT}" \
+      --location="${EXIT_GATE_LOCATION}" \
+      --repository="${EXIT_GATE_REPOSITORY}" \
+      --quiet
+  fi
+done
+
+if [[ -z "${SIGNING_KEY:-}" ]]; then
+  export SIGNING_KEY="$(gcloud secrets versions access latest \
+    --secret="bam-devrel-maven-gpg-key" \
+    --project="bam-devrel-releases" 2>/dev/null || \
+    gcloud secrets versions access latest \
+    --secret="google_ads_java_gpg_secring" \
+    --project="bam-devrel-releases")"
+fi
+
+if [[ -z "${SIGNING_PASSWORD:-}" ]]; then
+  export SIGNING_PASSWORD="$(gcloud secrets versions access latest \
+    --secret="bam-devrel-maven-gpg-password" \
+    --project="bam-devrel-releases" 2>/dev/null || \
+    gcloud secrets versions access latest \
+    --secret="google_ads_java_gpg_passphrase" \
+    --project="bam-devrel-releases" 2>/dev/null || true)"
+fi
+
+export GNUPGHOME="$(mktemp -d)"
+chmod 700 "${GNUPGHOME}"
+SETTINGS_XML="$(mktemp --suffix=.xml)"
+trap 'rm -rf "${GNUPGHOME}" "${SETTINGS_XML}"' EXIT
+
+printf '%s' "${SIGNING_KEY}" | gpg --batch --import
+
+ACCESS_TOKEN="$(gcloud auth print-access-token)"
+cat <<EOF > "${SETTINGS_XML}"
+<settings>
+  <servers>
+    <server>
+      <id>exit-gate</id>
+      <username>oauth2accesstoken</username>
+      <password>${ACCESS_TOKEN}</password>
+    </server>
+  </servers>
+</settings>
+EOF
+unset ACCESS_TOKEN
+
+mvn clean org.apache.maven.plugins:maven-deploy-plugin:2.8.2:deploy \
+  --settings "${SETTINGS_XML}" \
+  -DperformRelease=true \
+  -Dgpg.passphrase="${SIGNING_PASSWORD}" \
+  -DaltDeploymentRepository="exit-gate::default::https://us-maven.pkg.dev/${EXIT_GATE_PROJECT}/${EXIT_GATE_REPOSITORY}"
+
+if [[ "${DRY_RUN}" == "true" ]]; then
+  echo "=== DRY_RUN is enabled. Artifacts staged in Artifact Registry. ==="
+  exit 0
+fi
+
+cat <<EOF > manifest.json
+{
+  "publish_all": false,
+  "publishing_groups": [
+    {
+      "namespace": "com.google.api-ads",
+      "packages": [
+        { "name": "client-libs-parent" },
+        { "name": "ads-lib" },
+        { "name": "ads-lib-appengine" },
+        { "name": "ads-lib-axis" },
+        { "name": "dfp-appengine" },
+        { "name": "dfp-axis" }
+      ]
+    }
+  ]
+}
+EOF
+
+EXIT_GATE_BUCKET="gs://oss-exit-gate-prod-projects-bucket/googleads-java-lib/mavencentral/manifests"
+MANIFEST_NAME="manifest-$(date --utc +%Y%m%d%H%M%S'UTC').json"
+
+echo "=== Uploading manifest to ${EXIT_GATE_BUCKET}/${MANIFEST_NAME} ==="
+gcloud storage cp manifest.json "${EXIT_GATE_BUCKET}/${MANIFEST_NAME}"