# ci/cd for the public nostermd relay.
#
#  - every push/pr: gofmt check, vet, test, build.
#  - push to main / a v* tag: also build the image and push it to ecr public
#    (anonymous pulls) so anyone can `docker pull` it.
#
# this is the public contribution repo — it builds and ships only the relay
# image to the public registry. it never touches private ecr or redeploys any
# environment; promoting an image to a live relay is handled out of band.
#
# gitea 1.21 actions on a self-hosted (ec2) runner. aws auth uses the runner's
# ambient iam role (no stored creds): `aws ecr-public get-login-password` mints
# a short-lived token for `docker login`. the runner role needs ecr public push
# perms (ecr-public:GetAuthorizationToken, sts:GetServiceBearerToken,
# BatchCheckLayerAvailability, Put*/Upload*/Complete*).
name: ci

env:
  # ecr public always authenticates via the us-east-1 endpoint.
  AWS_REGION: us-east-1
  # public mirror for anonymous pulls. k3k1z1x5 is the account's ecr public
  # registry alias; the repo name (nostermd) is provisioned out of band.
  ECR_PUBLIC_REGISTRY: public.ecr.aws/k3k1z1x5
  ECR_PUBLIC_REPO: nostermd

on:
  push:
    branches: [main]
    tags: ['v*']
  pull_request:

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup Go
        uses: actions/setup-go@v5
        with:
          go-version: '1.25'

      - name: Verify formatting (gofmt)
        run: |
          unformatted="$(gofmt -l .)"
          if [ -n "$unformatted" ]; then
            echo "These files are not gofmt-clean:"
            echo "$unformatted"
            exit 1
          fi

      - name: Vet
        run: go vet ./...

      # no -race: go-nostr's unsafe json serializer trips the detector during
      # event signing (upstream lib issue, not a relay race). see README.md#tests.
      - name: Test
        run: go test ./...

      - name: Build
        run: go build -trimpath -o /dev/null ./cmd/nostermd

  image:
    needs: build
    # publish only from the default branch and version tags, never from prs.
    if: gitea.event_name == 'push' && (gitea.ref == 'refs/heads/main' || startsWith(gitea.ref, 'refs/tags/v'))
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Install AWS CLI
        # runner image ships without aws; install v2 if it's missing.
        run: |
          if ! command -v aws >/dev/null 2>&1; then
            apt-get update -qq
            apt-get install -y -qq curl unzip
            curl -fsSL "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o /tmp/awscliv2.zip
            unzip -q /tmp/awscliv2.zip -d /tmp
            /tmp/aws/install
          fi
          aws --version

      - name: Log in to Amazon ECR Public
        # ecr public auth is a separate endpoint (always us-east-1) with its own
        # login user (AWS). this is push auth; anonymous pulls need no login.
        run: |
          aws ecr-public get-login-password --region us-east-1 \
            | docker login --username AWS --password-stdin public.ecr.aws

      - name: Build and push image
        shell: bash
        run: |
          set -eo pipefail
          IMAGE="$ECR_PUBLIC_REGISTRY/$ECR_PUBLIC_REPO"
          # tag by commit sha for traceability.
          docker build -t "$IMAGE:${{ gitea.sha }}" .
          docker push "$IMAGE:${{ gitea.sha }}"
          # move :latest only on main.
          if [ "${{ gitea.ref }}" = "refs/heads/main" ]; then
            docker tag "$IMAGE:${{ gitea.sha }}" "$IMAGE:latest"
            docker push "$IMAGE:latest"
          fi
          # on a v* tag, also push that version tag.
          case "${{ gitea.ref }}" in
            refs/tags/v*)
              VERSION="${{ gitea.ref_name }}"
              docker tag "$IMAGE:${{ gitea.sha }}" "$IMAGE:$VERSION"
              docker push "$IMAGE:$VERSION"
              ;;
          esac