ci.yaml

name: ci

on:
  push:
    branches:
      - master
      - try
  pull_request:

permissions: {}

env:
  flake: github:${{ github.repository }}/${{ github.sha }}
  nix-conf: |-
    accept-flake-config = true
    always-allow-substitutes = true
    builders-use-substitutes = true
    max-jobs = auto
  cachix-install: nix profile install 'github:${{ github.repository }}/${{ github.sha }}#cachix'
  aarch64-host: aarch64.nixos.community
  aarch64-ssh-config: |-
    Host aarch64.nixos.community 147.28.143.250
        User lovesegfault
        IdentitiesOnly yes
        IdentityFile ~/.ssh/aarch64-builder-ed25519
  aarch64-ssh-known-host: |-
    aarch64-build-box,aarch64.nixos.community,147.75.77.190 ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMUTz5i9u5H2FHNAmZJyoJfIGyUm/HfGhfwnc142L3ds
  aarch64-machine-config: |-
    ssh-ng://lovesegfault@aarch64.nixos.community aarch64-linux /etc/nix/ssh/aarch64-builder-ed25519 64 1 big-parallel - c3NoLWVkMjU1MTkgQUFBQUMzTnphQzFsWkRJMU5URTVBQUFBSU1VVHo1aTl1NUgyRkhOQW1aSnlvSmZJR3lVbS9IZkdoZnduYzE0MkwzZHMgcm9vdEBuaXhvcwo=

jobs:
  flake-check:
    runs-on: ubuntu-latest
    steps:
      - uses: DeterminateSystems/nix-installer-action@v15
        with:
          extra-conf: ${{ env.nix-conf }}
      - uses: cachix/cachix-action@v15
        with:
          name: nix-config
          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
          extraPullNames: vim-config,nix-community
          installCommand: ${{ env.cachix-install }}
      - name: nix-flake-check
        run: nix flake check '${{ env.flake }}'
  flake-show:
    runs-on: ubuntu-latest
    steps:
      - uses: DeterminateSystems/nix-installer-action@v15
        with:
          extra-conf: ${{ env.nix-conf }}
      - uses: cachix/cachix-action@v15
        with:
          name: nix-config
          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
          extraPullNames: vim-config,nix-community
          installCommand: ${{ env.cachix-install }}
      - name: nix-flake-show
        run: nix flake show '${{ env.flake }}'
  get-attrs:
    runs-on: ubuntu-latest
    outputs:
      build: ${{ steps.get-attrs.outputs.build }}
      eval: ${{ steps.get-attrs.outputs.eval }}
    env:
      has_aarch64_ssh_key: ${{ secrets.AARCH64_BUILDER_KEY != '' }}
    steps:
      - uses: DeterminateSystems/nix-installer-action@v15
        with:
          extra-conf: ${{ env.nix-conf }}
      - id: install-jq
        run: nix profile install '${{ env.flake }}#jq'
      - id: get-attrs
        run: |
          function summary() {
            printf '%s\n' "${*}" >> "$GITHUB_STEP_SUMMARY"
          }

          summary "# CI"
          TMP="$(mktemp -d)"
          # host packages
          nix eval --json '${{ env.flake }}#hosts' | jq -c '
            to_entries
            | map({
                name: .key,
                evalOnly: false,
                hostPlatform: .value.hostPlatform,
                large: .value.large,
                attr: "packages.\(.value.hostPlatform).\(.key)"
            })
            | map(
                if .hostPlatform  == "x86_64-linux" then .runsOn="ubuntu-latest"
                elif .hostPlatform == "aarch64-linux" then .runsOn="ubuntu-latest"
                elif .hostPlatform == "x86_64-darwin" then .runsOn="macos-13"
                elif .hostPlatform == "aarch64-darwin" then .runsOn="macos-14"
                else .evalOnly=true | .runsOn="ubuntu-latest"
                end
            )
            | map(if .large then .evalOnly=true end)
          ' >"$TMP/hostAttrs.json"

          # handle not being able to build aarch64-linux attrs when the ssh key
          # is missing
          if [[ "${has_aarch64_ssh_key}" != 'true' ]]; then
            summary \
              "- ⚠️ AArch64 builder SSH key is unavailable, all \`aarch64-linux\` attrs will be eval-only"
            old_host_attrs="$(<"$TMP/hostAttrs.json")"
            jq -c \
              'map(if .hostPlatform == "aarch64-linux" then .evalOnly=true end)' \
              <<<"$old_host_attrs" >"$TMP/hostAttrs.json"
          fi

          # dev shells
          jq -c '
            unique_by(.hostPlatform)
            | sort_by(.runsOn)
            | map(
                .attr = "devShells.\(.hostPlatform).default.inputDerivation"
                | .name = "devShell-\(.hostPlatform)"
              )
          ' "$TMP/hostAttrs.json" >"$TMP/shellAttrs.json"

          # join shell and host attrs
          jq -c -s add "$TMP/hostAttrs.json" "$TMP/shellAttrs.json" >"$TMP/attrs.json"

          # warn about eval-only attrs
          read -r -a evalOnlyAttrs < \
            <(jq -c -r 'map(select(.evalOnly) | .name) | @sh' "$TMP/attrs.json" | tr -d \')
          if [[ "${#evalOnlyAttrs[@]}" -ne 0 ]]; then
            printf -v attrs "\`%s\`, " "${evalOnlyAttrs[@]}"
            summary \
              "- ⚠️ The following attributes will only be evaluated: ${attrs%, }"
          fi

          # add all to-build attrs to the summary
          read -r -a buildAttrs < \
            <(jq -c -r 'map(select(.evalOnly | not) | .name) | @sh' "$TMP/attrs.json" | tr -d \')
          if [[ "${#buildAttrs[@]}" -ne 0 ]]; then
            printf -v attrs "\`%s\`, " "${buildAttrs[@]}"
            summary \
              "- ✅ The following attributes will be built: ${attrs%, }"
          fi

          # check for dupes
          duplicate_count="$(jq -r '
            group_by([.name, .attr]) | map(select(length>1)) | length
            ' "$TMP/attrs.json")"
          if [[ "$duplicate_count" -ne 0 ]]; then
            summary \
              "- ‼️ Duplicate entries in \`attrs.json\`: \`$(cat "$TMP/attrs.json")\`"
            exit 1
          fi

          # split build and evalOnly attrs
          jq -c 'map(select(.evalOnly))' <"$TMP/attrs.json" >"$TMP/eval.json"
          jq -c 'map(select(.evalOnly | not))' <"$TMP/attrs.json" >"$TMP/build.json"

          echo "build=$(<"$TMP/build.json")" >>"$GITHUB_OUTPUT"
          echo "eval=$(<"$TMP/eval.json")" >>"$GITHUB_OUTPUT"

  eval:
    name: eval ${{ matrix.attrs.name }}
    runs-on: ${{ matrix.attrs.runsOn }}
    needs: [ get-attrs ]
    strategy:
      fail-fast: false
      matrix:
        attrs: ${{ fromJson(needs.get-attrs.outputs.eval) }}
    env:
      system: ${{ matrix.attrs.hostPlatform }}
    steps:
      - uses: DeterminateSystems/nix-installer-action@v15
        with:
          extra-conf: ${{ env.nix-conf }}
      - uses: cachix/cachix-action@v15
        with:
          name: nix-config
          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
          extraPullNames: vim-config,nix-community
          installCommand: ${{ env.cachix-install }}
      - name: eval
        if: ${{ matrix.attrs.evalOnly }}
        run: |
          nix eval --raw '${{ env.flake }}#${{ matrix.attrs.attr }}'

  build:
    name: build ${{ matrix.attrs.name }}
    runs-on: ${{ matrix.attrs.runsOn }}
    needs: [ get-attrs ]
    strategy:
      fail-fast: false
      matrix:
        attrs: ${{ fromJson(needs.get-attrs.outputs.build) }}
    env:
      aarch64-ssh-key: ${{ secrets.AARCH64_BUILDER_KEY }}
      system: ${{ matrix.attrs.hostPlatform }}
    steps:
      - uses: DeterminateSystems/nix-installer-action@v15
        with:
          extra-conf: ${{ env.nix-conf }}
      - uses: cachix/cachix-action@v15
        with:
          name: nix-config
          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
          extraPullNames: vim-config,nix-community
          installCommand: ${{ env.cachix-install }}
      - name: setup-aarch64-ssh
        if: ${{ env.system == 'aarch64-linux' || env.system == 'aarch64-darwin' }}
        run: |
          mkdir -p ~/.ssh
          sudo mkdir -p /etc/nix/ssh

          echo '${{ env.aarch64-ssh-config }}' | tee ~/.ssh/config | sudo tee /etc/nix/ssh/config
          echo '${{ env.aarch64-ssh-known-host }}' | tee -a ~/.ssh/known_hosts | sudo tee -a /etc/nix/ssh/known_hosts

          echo '${{ env.aarch64-ssh-key }}' > ~/.ssh/aarch64-builder-ed25519
          echo '${{ env.aarch64-ssh-key }}' | sudo tee /etc/nix/ssh/aarch64-builder-ed25519 >> /dev/null

          chmod 0600 ~/.ssh/*
          sudo chmod 0600 /etc/nix/ssh/*

          echo '${{ env.aarch64-machine-config }}' | sudo tee -a /etc/nix/machines
      - name: nix-fast-build
        run: |
          declare -a args=(
            '--no-nom'
            '--skip-cached'
            '--systems=${{ env.system }}'
            '--option' 'accept-flake-config' 'true'
            '--retries=3'
          )
          # Add the remote builder for aarch64-linux builds
          [[ '${{ env.system }}' == 'aarch64-linux' ]] && args+=('--remote=${{ env.aarch64-host }}')

          args+=('--flake=${{ env.flake }}#${{ matrix.attrs.attr }}')
          nix run '${{ env.flake }}#nix-fast-build' -- "${args[@]}"

  check:
    runs-on: ubuntu-latest
    needs: [ flake-check, flake-show, build, eval ]
    if: always()
    steps:
      - uses: re-actors/alls-green@release/v1
        with:
          jobs: ${{ toJSON(needs) }}
          allowed-skips: eval