chore(release): setup kokoro builds

.kokoro/build.cfg

@@ -0,0 +1,22 @@
+# -*- protobuffer -*-
+# proto-file: google3/devtools/kokoro/config/proto/build.proto
+# proto-message: BuildConfig
+
+build_file: "serverless/functions-framework-nodejs/.kokoro/build.sh"
+container_properties {
+  docker_image: "us-docker.pkg.dev/artifact-foundry-prod/docker-3p-trusted/node:22.13.1-bookworm"
+}
+
+fileset_artifacts {
+  name: "artifacts"
+  artifact_globs: "artifacts/*"
+  error_if_missing: true
+  destinations {
+    store_attestation: true
+    gcs {
+      gcs_root_path: "oss-exit-gate-prod-projects-bucket/ff-releases/npm/attestations"
+    }
+  }
+  generate_sbom_from_fileset: true
+  generate_attestation: true
+}

.kokoro/build.sh

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+#!/bin/bash
+set -euo pipefail
+
+### cd to Git on Borg folder in Kokoro
+cd "$KOKORO_ARTIFACTS_DIR/git/serverless/functions-framework-nodejs"
+
+### Configure Airlock
+# APT
+rm -f /etc/apt/sources.list.d/* /etc/apt/sources.list
+echo 'deb https://us-apt.pkg.dev/remote/artifact-foundry-prod/debian-3p-remote-bookworm bookworm main' | \
+    tee -a  /etc/apt/sources.list.d/artifact-registry.list
+
+# NPM
+cat > .npmrc <<EOF
+registry=https://us-npm.pkg.dev/artifact-foundry-prod/npm-3p-trusted/
+//us-npm.pkg.dev/artifact-foundry-prod/npm-3p-trusted/:always-auth=true
+EOF
+cp .npmrc "$HOME/.npmrc"
+
+### Build all package.json
+ARTIFACTS="${KOKORO_ARTIFACTS_DIR}/artifacts"
+mkdir "${ARTIFACTS}"
+
+readarray -t package_jsons < <(find "." -type d -name "node_modules" -prune -o -name "package.json" -print)
+for package_file in "${package_jsons[@]}"; do
+  echo "Building package ${package_file}"
+  package_dir="$(dirname "${package_file}")"
+  pushd "${package_dir}"
+  npm ci
+  # npm pack and npm publish needs to be distinct steps to ensure the
+  # artifacts will be stored locally for attestation generation.
+  npm pack --pack-destination="${ARTIFACTS}"
+  popd
+done
+
+### Authenticate to OSS Exit Gate
+# Replace default registry with OSS Exit Gate
+cat > .npmrc <<EOF
+registry=https://us-npm.pkg.dev/oss-exit-gate-prod/ff-releases--npm/
+//us-npm.pkg.dev/oss-exit-gate-prod/ff-releases--npm/:always-auth=true
+EOF
+
+cp .npmrc "$HOME/.npmrc"
+
+npx google-artifactregistry-auth
+
+### Publish all packages
+echo "Publish package"
+for file in "${ARTIFACTS}"/*.tgz; do
+  if [[ -e "${file}" ]]; then
+    echo "Publishing TGZ: ${file}"
+    npm publish "${file}"
+  fi
+done

.kokoro/release.cfg

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+# -*- protobuffer -*-
+# proto-file: google3/devtools/kokoro/config/proto/build.proto
+# proto-message: BuildConfig
+
+build_file: "serverless/functions-framework-nodejs/.kokoro/release.sh"
+container_properties {
+  docker_image: "us-docker.pkg.dev/artifact-foundry-prod/docker-3p-trusted/ubuntu:22.04"
+}
+
+fileset_artifacts {
+  name: "manifest"
+  artifact_globs: "manifest.json"
+  error_if_missing: true
+  destinations {
+    store_attestation: false
+    gcs {
+      gcs_root_path: "oss-exit-gate-prod-projects-bucket/ff-releases/npm/manifests"
+      populate_content_type: true
+    }
+  }
+  generate_sbom_from_fileset: false
+  generate_attestation: false
+}

.kokoro/release.sh

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+#!/bin/bash
+set -euo pipefail
+
+cd "${KOKORO_ARTIFACTS_DIR}"
+
+cat > manifest.json <<'EOF'
+{
+  "publish_all": true
+}
+EOF