stages:
  - ci
  - artifacts
  - publish

variables:
  # Makes some things print in color
  TERM: ansi
  # Faster cache and artifact compression / decompression
  FF_USE_FASTZIP: true
  # Print progress reports for cache and artifact transfers
  TRANSFER_METER_FREQUENCY: 5s

# Avoid duplicate pipelines
# See: https://docs.gitlab.com/ee/ci/yaml/workflow.html#switch-between-branch-pipelines-and-merge-request-pipelines
workflow:
  rules:
    - if: $CI_PIPELINE_SOURCE == "merge_request_event"
    - if: $CI_COMMIT_BRANCH && $CI_OPEN_MERGE_REQUESTS
      when: never
    - if: $CI

before_script:
  # Enable nix-command and flakes
  - if command -v nix > /dev/null; then echo "experimental-features = nix-command flakes" >> /etc/nix/nix.conf; fi

  # Add conduwuit binary cache
  - if command -v nix > /dev/null; then echo "extra-substituters = https://attic.kennel.juneis.dog/conduwuit" >> /etc/nix/nix.conf; fi
  - if command -v nix > /dev/null; then echo "extra-trusted-public-keys = conduwuit:BbycGUgTISsltcmH0qNjFR9dbrQNYgdIAcmViSGoVTE=" >> /etc/nix/nix.conf; fi

  - if command -v nix > /dev/null; then echo "extra-substituters = https://attic.kennel.juneis.dog/conduit" >> /etc/nix/nix.conf; fi
  - if command -v nix > /dev/null; then echo "extra-trusted-public-keys = conduit:eEKoUwlQGDdYmAI/Q/0slVlegqh/QmAvQd7HBSm21Wk=" >> /etc/nix/nix.conf; fi

  # Add alternate binary cache
  - if command -v nix > /dev/null && [ -n "$ATTIC_ENDPOINT" ]; then echo "extra-substituters = $ATTIC_ENDPOINT" >> /etc/nix/nix.conf; fi
  - if command -v nix > /dev/null && [ -n "$ATTIC_PUBLIC_KEY" ]; then echo "extra-trusted-public-keys = $ATTIC_PUBLIC_KEY" >> /etc/nix/nix.conf; fi

  # Add Lix binary cache
  - if command -v nix > /dev/null; then echo "extra-substituters = https://cache.lix.systems" >> /etc/nix/nix.conf; fi
  - if command -v nix > /dev/null; then echo "extra-trusted-public-keys = cache.lix.systems:aBnZUw8zA7H35Cz2RyKFVs3H4PlGTLawyY5KRbvJR8o=" >> /etc/nix/nix.conf; fi

  # Add crane binary cache
  - if command -v nix > /dev/null; then echo "extra-substituters = https://crane.cachix.org" >> /etc/nix/nix.conf; fi
  - if command -v nix > /dev/null; then echo "extra-trusted-public-keys = crane.cachix.org-1:8Scfpmn9w+hGdXH/Q9tTLiYAE/2dnJYRJP7kl80GuRk=" >> /etc/nix/nix.conf; fi

  # Add nix-community binary cache
  - if command -v nix > /dev/null; then echo "extra-substituters = https://nix-community.cachix.org" >> /etc/nix/nix.conf; fi
  - if command -v nix > /dev/null; then echo "extra-trusted-public-keys = nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs=" >> /etc/nix/nix.conf; fi

  # Install direnv and nix-direnv
  - if command -v nix > /dev/null; then nix-env -iA nixpkgs.direnv nixpkgs.nix-direnv; fi

  # Allow .envrc
  - if command -v nix > /dev/null; then direnv allow; fi

  # Set CARGO_HOME to a cacheable path
  - export CARGO_HOME="$(git rev-parse --show-toplevel)/.gitlab-ci.d/cargo"

ci:
  stage: ci
  image: nixos/nix:2.24.9
  script:
    # Cache CI dependencies
    - ./bin/nix-build-and-cache ci

    - direnv exec . engage
  cache:
    key: nix
    paths:
      - target
      - .gitlab-ci.d
  rules:
    # CI on upstream runners (only available for maintainers)
    - if: $CI_PIPELINE_SOURCE == "merge_request_event" && $IS_UPSTREAM_CI == "true"
    # Manual CI on unprotected branches that are not MRs
    - if: $CI_PIPELINE_SOURCE != "merge_request_event" && $CI_COMMIT_REF_PROTECTED == "false"
      when: manual
    # Manual CI on forks
    - if: $IS_UPSTREAM_CI != "true"
      when: manual
    - if: $CI
  interruptible: true

artifacts:
  stage: artifacts
  image: nixos/nix:2.24.9
  script:
    - ./bin/nix-build-and-cache just .#static-x86_64-unknown-linux-musl
    - cp result/bin/conduit x86_64-unknown-linux-musl

    - mkdir -p target/release
    - cp result/bin/conduit target/release
    - direnv exec . cargo deb --no-build --no-strip
    - mv target/debian/*.deb x86_64-unknown-linux-musl.deb

    # Since the OCI image package is based on the binary package, this has the
    # fun side effect of uploading the normal binary too. Conduit users who are
    # deploying with Nix can leverage this fact by adding our binary cache to
    # their systems.
    #
    # Note that although we have an `oci-image-x86_64-unknown-linux-musl`
    # output, we don't build it because it would be largely redundant to this
    # one since it's all containerized anyway.
    - ./bin/nix-build-and-cache just .#oci-image
    - cp result oci-image-amd64.tar.gz

    - ./bin/nix-build-and-cache just .#static-aarch64-unknown-linux-musl
    - cp result/bin/conduit aarch64-unknown-linux-musl

    - ./bin/nix-build-and-cache just .#oci-image-aarch64-unknown-linux-musl
    - cp result oci-image-arm64v8.tar.gz

    - ./bin/nix-build-and-cache just .#book
    # We can't just copy the symlink, we need to dereference it https://gitlab.com/gitlab-org/gitlab/-/issues/19746
    - cp -r --dereference result public
  artifacts:
    paths:
      - x86_64-unknown-linux-musl
      - aarch64-unknown-linux-musl
      - x86_64-unknown-linux-musl.deb
      - oci-image-amd64.tar.gz
      - oci-image-arm64v8.tar.gz
      - public
  rules:
    # CI required for all MRs
    - if: $CI_PIPELINE_SOURCE == "merge_request_event"
    # Optional CI on forks
    - if: $IS_UPSTREAM_CI != "true"
      when: manual
      allow_failure: true
    - if: $CI
  interruptible: true

pages:
  stage: publish
  dependencies:
    - artifacts
  only:
    - next
  script:
    - "true"
  artifacts:
    paths:
      - public