# GitLab-CI dev→prod pipeline for VNCmail+ — GitOps via ArgoCD.
#
# Revised after direct inspection of the real infrastructure found ArgoCD
# already installed (idle, zero Applications) on the dev-k8s-1/2/3 cluster.
# That's more idiomatic than a runner-executes-kubectl design, and it means
# this pipeline needs ZERO cluster credentials — CI only ever talks to the
# container registry and to this git repo. ArgoCD (which already has
# whatever cluster access it needs, set up once when its Applications were
# registered — see deploy/argocd/) is what actually applies anything.
#
# Design:
#   - One image name, environment lives only in the tag. No more -dev/-beta
#     name confusion from the old GitHub Actions workflow.
#   - MR into `dev`: verify only (typecheck/lint/unit test/build check). No
#     push, no deploy — this is the multi-developer merge gate.
#   - Push to `dev`: build+push an immutable `sha-<sha>` tag, then commit a
#     one-line tag-bump into overlays/dev/image-tag/kustomization.yaml
#     (`[skip ci]`, so this doesn't retrigger itself). ArgoCD's `vncmail-dev`
#     Application has automated sync — it notices the git change and applies
#     it. No approval needed, dev always deploys, and this job never touches
#     the cluster directly.
#   - Push to `main`: NEVER rebuilds. `main` only ever advances via
#     `git merge --ff-only dev`, so main's HEAD commit already has a built
#     image (the same sha- tag dev already deployed). This job just bumps
#     overlays/prod/image-tag/kustomization.yaml to point at that same tag.
#     The actual promotion gate is a HUMAN clicking Sync on the `vncmail-prod` ArgoCD
#     Application (deliberately NOT automated sync) — not a GitLab manual
#     job, since ArgoCD already provides that exact gate more directly.
#     Until prod Stalwart/hostname/secrets are real (see VNCMAIL-SETUP.md),
#     nobody should click that Sync button — but nothing here does it for
#     you either way.
#
# Deliberately single-platform (linux/amd64) — this pipeline serves two
# known amd64 microk8s clusters, not public multi-arch distribution (that's
# what the GHCR release workflows are for, untouched by this file).
#
# Registry history (so nobody re-litigates this from scratch). GitLab's own
# Container Registry was tried twice and does not work on this server:
#
#   Round 1: registry_external_url was unset, so $CI_REGISTRY was empty and
#            docker login silently fell through to Docker Hub.
#   Round 2: after the server-side config, the project's sidebar DID show
#            "Container Registry" and docker login DID succeed - but the push
#            failed 403. Diagnosed 2026-08-05 by curling the vhost directly:
#
#              $ curl -i https://registry.gitlab.vnc.biz/v2/
#              www-authenticate: Bearer realm="http://gitlab.vnc.biz/jwt/auth",
#                                       service="dependency_proxy"
#              x-runtime: 0.020470
#              x-gitlab-meta: {"correlation_id":...}
#
#            x-runtime/x-gitlab-meta are RAILS headers, and the service is
#            "dependency_proxy" - so nginx routes that hostname to the GitLab
#            Rails app, which reads /v2/ as the dependency proxy (a Docker Hub
#            pull-through cache), NOT to the registry container. The registry
#            service was never actually wired behind that vhost. That is why
#            login worked (Rails issues an unscoped dependency-proxy token)
#            while a scoped :push request 403'd - the dependency proxy has no
#            push concept at all.
#
# Fixing that is an nginx/omnibus change on the GitLab server (registry
# service must actually listen behind registry.gitlab.vnc.biz), not something
# any .gitlab-ci.yml can reach. Until someone does that, GHCR it is - the
# same image the sandbox already pulls, and confirmed public so the cluster
# needs no imagePullSecrets (see deploy/k8s/base/deployment.yaml).
#
# Prerequisite this file assumes (documented in VNCMAIL-SETUP.md, not
# something this file can set up itself):
#   - A GitHub PAT with `write:packages` for ghcr.io/brvncde-dotcom as
#     $GITLAB_CI_GHCR_TOKEN, plus the matching GitHub username as
#     $GITLAB_CI_GHCR_USER — both masked+protected CI/CD variables. A GitHub
#     credential can only come from GitHub; nothing GitLab-native substitutes.
#   - A GitLab Runner (any kind — no cluster access needed at all now).
#   - Either "allow this job token to push to this project" enabled
#     (Settings → CI/CD → Job token permissions), OR a project access token
#     with `write_repository` scope in $GITLAB_PUSH_TOKEN. The job below
#     tries CI_JOB_TOKEN first (see the script).
#
# deploy/k8s/ca/ (the EJBCA internal CA) is never referenced anywhere below,
# and neither ArgoCD Application in deploy/argocd/ points at it — that stays
# a fully manual, human-only runbook (see deploy/k8s/ca/README.md).

stages:
  - verify
  - build
  - bump-dev
  - bump-prod

variables:
  # GHCR, not GitLab's own registry - see the "Registry history" note in the
  # header for the curl output proving why. Same image the sandbox already
  # pulls today.
  IMAGE: ghcr.io/brvncde-dotcom/vncmail-plus-dev
  GIT_STRATEGY: clone

# ---------------------------------------------------------------------------
# verify — required check on every MR into dev. No registry, no cluster.
# ---------------------------------------------------------------------------
verify:
  stage: verify
  image: node:24-alpine
  rules:
    - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
  script:
    - npm ci
    - npm run typecheck
    - npm run lint
    - npm run test:translations
    - npm run build
  # test:integration is deliberately NOT here — it spins up a real Stalwart
  # fixture via docker-compose, which needs an actual Docker daemon this
  # runner's Kubernetes executor doesn't provide without privileged mode
  # (see the build job below). Candidate for a separate scheduled job on a
  # differently-configured runner, not a blocker on every MR.

# ---------------------------------------------------------------------------
# build — push to dev only. Builds once; main never rebuilds (see header).
# ---------------------------------------------------------------------------
build:
  stage: build
  # Kaniko builds OCI images without a Docker daemon, so it needs neither a
  # dind service nor a privileged pod — GitLab's own recommended approach
  # for the Kubernetes executor specifically. The docker:27-cli + dind
  # combination that was here before this got as far as a successful
  # $CI_REGISTRY login, then failed every way it was pointed
  # (unix:///var/run/docker.sock, tcp://docker:2375, tcp://localhost:2375):
  # the dind container itself was never actually listening, which on this
  # executor means it needs `privileged: true` in the runner's own
  # config.toml — a cluster/GitLab-admin setting outside this file's
  # control. Kaniko sidesteps that requirement entirely rather than chasing
  # runner permissions further, and is also the safer default on a shared
  # cluster (no privileged containers at all).
  image:
    name: gcr.io/kaniko-project/executor:v1.23.2-debug
    entrypoint: [""]
  rules:
    - if: '$CI_PIPELINE_SOURCE == "push" && $CI_COMMIT_BRANCH == "dev"'
  script:
    # Fail loudly and immediately if the GHCR credentials aren't configured,
    # rather than letting kaniko get all the way through a full Next.js build
    # and only then 403 on push (which is exactly how the GitLab-registry
    # attempt burned several pipeline runs).
    - |
      if [ -z "$GITLAB_CI_GHCR_TOKEN" ] || [ -z "$GITLAB_CI_GHCR_USER" ]; then
        echo "ERROR: \$GITLAB_CI_GHCR_TOKEN and/or \$GITLAB_CI_GHCR_USER are not set."
        echo "Add both under Settings -> CI/CD -> Variables (masked + protected)."
        echo "The token is a GitHub PAT with the write:packages scope."
        exit 1
      fi
    - mkdir -p /kaniko/.docker
    - |
      echo "{\"auths\":{\"ghcr.io\":{\"auth\":\"$(printf '%s:%s' "$GITLAB_CI_GHCR_USER" "$GITLAB_CI_GHCR_TOKEN" | base64 | tr -d '\n')\"}}}" > /kaniko/.docker/config.json
    - >
      /kaniko/executor
      --context "$CI_PROJECT_DIR"
      --dockerfile "$CI_PROJECT_DIR/Dockerfile"
      --build-arg GIT_COMMIT=$CI_COMMIT_SHA
      --destination "$IMAGE:sha-$CI_COMMIT_SHORT_SHA"
      --destination "$IMAGE:dev-latest"

# ---------------------------------------------------------------------------
# bump-dev — no cluster access. Commits the just-built tag into the overlay
# ArgoCD watches; ArgoCD's automated sync does the actual apply.
# ---------------------------------------------------------------------------
bump-dev:
  stage: bump-dev
  image: alpine/git:2.47.0
  rules:
    - if: '$CI_PIPELINE_SOURCE == "push" && $CI_COMMIT_BRANCH == "dev"'
  script:
    - TAG="sha-$CI_COMMIT_SHORT_SHA"
    - |
      cat > deploy/k8s/overlays/dev/image-tag/kustomization.yaml <<EOF
      # Owned by CI (bump-dev job in .gitlab-ci.yml) - regenerated every
      # push to dev. Do not hand-edit; edits here get overwritten.
      apiVersion: kustomize.config.k8s.io/v1alpha1
      kind: Component
      images:
        - name: ghcr.io/brvncde-dotcom/vncmail-plus-dev
          newName: $IMAGE
          newTag: $TAG
      EOF
    - git config user.name "vncmail-ci"
    - git config user.email "ci@vnc.biz"
    - git add deploy/k8s/overlays/dev/image-tag/kustomization.yaml
    - |
      if git diff --cached --quiet; then
        echo "No change (tag already pinned) - nothing to commit"
      else
        git commit -m "chore(deploy): pin dev to $TAG [skip ci]"
        git push "https://gitlab-ci-token:${GITLAB_PUSH_TOKEN:-$CI_JOB_TOKEN}@${CI_SERVER_HOST}/${CI_PROJECT_PATH}.git" HEAD:dev
      fi

# ---------------------------------------------------------------------------
# bump-prod — no cluster access, no rebuild. Points overlays/prod at the
# exact tag already running on dev. Does NOT deploy anything: vncmail-prod's
# ArgoCD Application has manual sync, so this only prepares what a human
# would be syncing, it doesn't sync it.
# ---------------------------------------------------------------------------
bump-prod:
  stage: bump-prod
  image: alpine/git:2.47.0
  rules:
    - if: '$CI_PIPELINE_SOURCE == "push" && $CI_COMMIT_BRANCH == "main"'
  script:
    - TAG="sha-$CI_COMMIT_SHORT_SHA"
    - echo "main advanced to $CI_COMMIT_SHA (must be a dev commit, ff-only) - that image already exists as $IMAGE:$TAG"
    - |
      cat > deploy/k8s/overlays/prod/image-tag/kustomization.yaml <<EOF
      # Owned by CI (bump-prod job in .gitlab-ci.yml) - regenerated every
      # push to main. Do not hand-edit; edits here get overwritten. Bumping
      # this is NOT the same as deploying it - vncmail-prod's ArgoCD
      # Application has manual sync, see the note in the parent
      # kustomization.yaml.
      apiVersion: kustomize.config.k8s.io/v1alpha1
      kind: Component
      images:
        - name: ghcr.io/brvncde-dotcom/vncmail-plus-dev
          newName: $IMAGE
          newTag: $TAG
      EOF
    - git config user.name "vncmail-ci"
    - git config user.email "ci@vnc.biz"
    - git add deploy/k8s/overlays/prod/image-tag/kustomization.yaml
    - |
      if git diff --cached --quiet; then
        echo "No change (tag already pinned) - nothing to commit"
      else
        git commit -m "chore(deploy): point prod overlay at $TAG (not synced - manual gate in ArgoCD) [skip ci]"
        git push "https://gitlab-ci-token:${GITLAB_PUSH_TOKEN:-$CI_JOB_TOKEN}@${CI_SERVER_HOST}/${CI_PROJECT_PATH}.git" HEAD:main
      fi