Replace Ruby bosh-nats-sync with Golang implementation

.github/workflows/go.yml

@@ -13,3 +13,35 @@ jobs:
     - uses: golangci/golangci-lint-action@v9
       with:
         working-directory: src/brats/
+
+  lint-bosh-nats-sync:
+    name: lint (bosh-nats-sync)
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+    - uses: actions/checkout@v7
+      with:
+        persist-credentials: false
+    - uses: actions/setup-go@v6
+      with:
+        go-version-file: src/bosh-nats-sync/go.mod
+    - uses: golangci/golangci-lint-action@v9
+      with:
+        working-directory: src/bosh-nats-sync/
+
+  test-bosh-nats-sync:
+    name: test (bosh-nats-sync)
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+    - uses: actions/checkout@v7
+      with:
+        persist-credentials: false
+    - uses: actions/setup-go@v6
+      with:
+        go-version-file: src/bosh-nats-sync/go.mod
+    - name: Run tests
+      run: go test -race ./...
+      working-directory: src/bosh-nats-sync/

.github/workflows/ruby.yml

@@ -9,7 +9,6 @@ jobs:
         sub_project:
         - common:parallel
         - monitor:parallel
-        - nats_sync:parallel
         - release:parallel
         - integration_support:parallel
     steps:

ci/fly-bats.yml

@@ -0,0 +1,149 @@
+---
+# Standalone pipeline for running the BOSH Acceptance Test suite (BATs)
+# against a specific branch.
+#
+# Intended to be driven by `bundle exec rake fly:bats` from src/, which
+# pushes the current branch and sets this pipeline automatically.
+#
+# Manual usage:
+#   fly -t bosh set-pipeline -p bats-local \
+#       -c ci/fly-bats.yml \
+#       --var bosh_repo=https://github.com/cloudfoundry/bosh.git \
+#       --var bosh_branch=my-feature-branch \
+#       --var env_name=bats-local \
+#       --var stemcell_name=bosh-google-kvm-ubuntu-noble \
+#       --var deploy_args="-o bosh-deployment/external-ip-not-recommended.yml" \
+#       --var bat_rspec_flags=""
+#   fly -t bosh unpause-pipeline -p bats-local
+#   fly -t bosh trigger-job -j bats-local/bats -w
+
+resources:
+  - name: bosh
+    type: git
+    source:
+      uri: ((bosh_repo))
+      branch: ((bosh_branch))
+
+  # bosh-ci is the same repo as bosh but filtered to ci/ paths so that
+  # scripts under ci/bats/ are available at bosh-ci/ in the task workspace.
+  - name: bosh-ci
+    type: git
+    source:
+      uri: ((bosh_repo))
+      branch: ((bosh_branch))
+      paths: [ci]
+
+  - name: bosh-cli
+    type: github-release
+    source:
+      owner: cloudfoundry
+      repository: bosh-cli
+      access_token: ((github_public_repo_token))
+
+  - name: stemcell
+    type: bosh-io-stemcell
+    source:
+      name: bosh-google-kvm-ubuntu-noble
+
+  - name: bats
+    type: git
+    source:
+      uri: https://github.com/cloudfoundry/bosh-acceptance-tests.git
+      branch: master
+
+  - name: bosh-deployment
+    type: git
+    source:
+      uri: https://github.com/cloudfoundry/bosh-deployment
+      branch: master
+
+  - name: integration-image
+    type: registry-image
+    source:
+      repository: ghcr.io/cloudfoundry/bosh/integration
+      tag: main
+      username: ((github_read_write_packages.username))
+      password: ((github_read_write_packages.password))
+
+jobs:
+  - name: bats
+    serial: true
+    plan:
+      - do:
+          - in_parallel:
+              - get: bosh
+              - get: bosh-ci
+              - get: bosh-cli
+                params:
+                  globs: [bosh-cli-*-linux-amd64]
+              - get: stemcell
+              - get: bats
+              - get: bosh-deployment
+              - get: integration-image
+
+          - task: make-candidate
+            image: integration-image
+            file: bosh-ci/ci/tasks/make-candidate.yml
+
+          - task: compile-bosh-release
+            config:
+              platform: linux
+              # ubuntu-noble-stemcell ships the BOSH agent at /var/vcap/bosh/bin/bosh-agent.
+              image_resource:
+                type: registry-image
+                source:
+                  repository: ghcr.io/cloudfoundry/ubuntu-noble-stemcell
+              inputs:
+                - name: release
+              outputs:
+                - name: compiled-release
+              run:
+                path: /bin/bash
+                args:
+                  - -exc
+                  - |
+                    # golang-1.26-linux on this branch is a stub (env files only; no binary
+                    # blob in GCS yet).  Install Go 1.26.3 and drop a shim at
+                    # /usr/local/bin/go so `go build` works even though $GOROOT/bin is empty.
+                    GO_VERSION=1.26.3
+                    if ! /usr/local/go/bin/go version 2>/dev/null | grep -q "go${GO_VERSION}"; then
+                      curl -sSfL "https://go.dev/dl/go${GO_VERSION}.linux-amd64.tar.gz" \
+                        | tar -C /usr/local -xz
+                    fi
+                    cat > /usr/local/bin/go <<'GOSHIM'
+                    #!/bin/bash
+                    export GOROOT=/usr/local/go
+                    exec /usr/local/go/bin/go "$@"
+                    GOSHIM
+                    chmod +x /usr/local/bin/go
+
+                    /var/vcap/bosh/bin/bosh-agent compile \
+                      --output-directory compiled-release \
+                      release/*.tgz
+
+          - task: run-bats
+            image: integration-image
+            input_mapping:
+              bosh-release: compiled-release
+            config:
+              platform: linux
+              inputs:
+                - name: bosh
+                - name: bosh-ci
+                - name: bosh-cli
+                - name: bosh-deployment
+                - name: stemcell
+                - name: bats
+                - name: bosh-release
+              caches:
+                - path: cache-dot-bosh-dir
+              params:
+                BAT_INFRASTRUCTURE: gcp
+                GCP_JSON_KEY: ((gcp_json_key))
+                GCP_PROJECT_ID: ((gcp_project_id))
+                STEMCELL_NAME: ((stemcell_name))
+                ENV_NAME: ((env_name))
+                DEPLOY_ARGS: ((deploy_args))
+                BAT_RSPEC_FLAGS: ((bat_rspec_flags))
+              run:
+                path: bosh/ci/tasks/run-bats-pipeline.sh

ci/pipeline.yml

@@ -1414,6 +1414,16 @@ jobs:
           output_repo: bosh-out
         params:
           SOURCE_PATH: src/brats/
+      - task: bump-bosh-nats-sync-deps
+        file: golang-release/ci/tasks/shared/bump-deps.yml
+        input_mapping:
+          input_repo: bosh-out
+        output_mapping:
+          output_repo: bosh-out
+        params:
+          SOURCE_PATH: src/bosh-nats-sync/
+          GO_PACKAGE: golang-1.26-linux
+          GOOS_LIST: linux
       - task: lint-brats
         file: bosh-ci/ci/tasks/lint-brats.yml
         image: integration-image
@@ -1455,6 +1465,8 @@ jobs:
             trigger: true
             params:
               globs: [ nats-server-v*-linux-amd64.tar.gz ]
+          - get: golang-release
+            trigger: true
       - task: bump-nginx-packages
         file: nginx-release/ci/shared/bump-nginx-package.yml
         image: integration-image
@@ -1518,6 +1530,21 @@ jobs:
               options:
                 credentials_source: static
                 json_key: '((gcp_json_key))'
+      - task: bump-golang-package
+        file: golang-release/ci/tasks/shared/bump-golang-package.yml
+        input_mapping:
+          input_repo: bosh-out
+        output_mapping:
+          output_repo: bosh-out
+        params:
+          GIT_USER_NAME: *git_user_name
+          GIT_USER_EMAIL: *git_user_email
+          PACKAGES: ["golang-1.26-linux"]
+          PRIVATE_YML: |
+            blobstore:
+              options:
+                credentials_source: static
+                json_key: '((gcp_json_key))'
       - task: bump-ruby-package
         file: ruby-release/ci/tasks/shared/bump-ruby-package.yml
         input_mapping: