# CI on every push and pull request (private repository, free runner minutes).
#
# What runs: the lottery-hash crate's tests (igneum-pow, release profile), the census tool's build, the two Python
# simulators' --quick modes (each under two minutes), and the tree gate: every fast check in ONE script,
# tools/ci/pre-push.sh (site build and link check, the ledger sentences, the identity grep of the public export list
# and the served site, Windows-valid paths, workflow shell syntax, the copied-sources and playbook classes, the unit
# tests, the no-secrets check). The pre-push hook runs the SAME script before a push to master or release-*, so the
# local gate and CI cannot drift (6 October 2026: 131 red `ci` runs in three days, 92 of them on master, every one a
# tree check that would have failed on the pushing machine in under 25 s; docs/analysis/ci-failures-2026-10-06.md).
#
# Where it runs: `pow` and `sims` go to the self-hosted pool (label igneum-build-1: the runners on igneum-build-1 and, since
# 7 October 2026, igneum-build-2, which carries that label too; rustc pinned, sccache read-only) and only when the push
# touched code (the `changes` job; a docs-only push skips them)
# when the repository variable IGNEUM_CI_RUNNER is `box`, else to ubuntu-latest (docs/plans/ci-self-hosted.md; GitHub
# has no fallback in runs-on, the variable is the switch). The `site` job stays on GitHub's machines. The red watcher
# is its own workflow, .github/workflows/ci-red.yml (workflow_run, so the copy on master watches every branch's run
# whatever ci.yml that branch carries): one line per failed run, naming the branch, the commit, the red check and the
# pushing author, to the hidden updates channel and to /srv/ci-red/red.jsonl (tools/ci/red-watch.mjs;
# infra/build-server/ci-red), so nobody opens the Actions page to learn a branch is red (the inline `red` job here
# watched master and release-* only until 7 October 2026, when eight red runs on ca3-v4-node went unseen).
#
# What does not run, on purpose: the node fork (vendor/igneum-node*, a rusty-kaspa fork of about 500 crates with
# rocksdb, blst and the execution layer) is gitignored here and too big for the free runners today (a cold build is
# 20 to 55 minutes on 2 to 8 vCPU, docs/bench-log.md). The workflow builds igneum-pow only; the fork's own tests run
# on the Mac and the seed node (infra/seed-nodes, infra/fast-time).
name: ci
on:
  push:
  pull_request:
jobs:
  changes:
    # What the push touched (tools/ci/docs-only-check.sh): a push of documents only (docs/, site/, *.md) skips the two
    # compile-or-compute jobs below, which read none of those paths, so the self-hosted queue carries only runs that can
    # change their result (7 October 2026: 31 runs queued on one runner, most of them status-document pushes). The tree
    # gate (the `site` job) runs on ubuntu-latest for every push. A pull request, a new branch or a force push answers
    # code=true (no `before` to compare from), as does any error reading the compare API: when in doubt, run.
    name: what the push touched (docs-only runs skip the Rust and simulator jobs)
    runs-on: ubuntu-latest
    outputs:
      code: ${{ steps.classify.outputs.code }}
    steps:
      - uses: actions/checkout@v4
        with:
          sparse-checkout: tools/ci
      - id: classify
        env:
          GH_TOKEN: ${{ github.token }}
          BEFORE: ${{ github.event.before }}
          AFTER: ${{ github.sha }}
          REPO: ${{ github.repository }}
          EVENT: ${{ github.event_name }}
        run: |
          if [ "$EVENT" != push ] || [ -z "$BEFORE" ] || [ "$BEFORE" = 0000000000000000000000000000000000000000 ]; then
            echo "code=true" >> "$GITHUB_OUTPUT"; echo "no base to compare from ($EVENT): the compile jobs run"; exit 0
          fi
          files="$(gh api "repos/$REPO/compare/$BEFORE...$AFTER" --paginate --jq '.files[].filename' 2>/dev/null || true)"
          line="$(printf '%s\n' "$files" | bash tools/ci/docs-only-check.sh)"
          echo "$line" >> "$GITHUB_OUTPUT"
          echo "$line: $(printf '%s\n' "$files" | grep -c .) changed path(s) between ${BEFORE:0:8} and ${AFTER:0:8}"
  pow:
    name: igneum-pow tests, igneum-census build
    needs: changes
    if: ${{ needs.changes.outputs.code == 'true' }}
    runs-on: ${{ vars.IGNEUM_CI_RUNNER == 'box' && fromJSON('["self-hosted", "linux", "x64", "igneum-build-1"]') || 'ubuntu-latest' }}
    steps:
      - uses: actions/checkout@v4
      - name: toolchain
        run: rustc --version && cargo --version
      - name: igneum-pow tests (release)
        working-directory: igneum-pow
        run: cargo test --release
      - name: pack loader seed rule (packfile.h on a known-good and a known-mismatched pack)
        run: bash proto-cuda/nvrtc/emu/packfile-test.sh
      - name: igneum-census build (release)
        working-directory: igneum-census
        run: cargo build --release
  sims:
    name: simulators, quick modes
    needs: changes
    # master and release-* pushes, and pull requests into them, only (main, 7 October 2026: every code push cost two box jobs and the
    # queue read 22); a feature-branch code push runs the igneum-pow tests alone. tools/ci/sims-branch-check.sh holds this rule.
    if: ${{ needs.changes.outputs.code == 'true' && ((github.event_name == 'push' && (github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/heads/release-'))) || (github.event_name == 'pull_request' && (github.base_ref == 'master' || startsWith(github.base_ref, 'release-')))) }}
    runs-on: ${{ vars.IGNEUM_CI_RUNNER == 'box' && fromJSON('["self-hosted", "linux", "x64", "igneum-build-1"]') || 'ubuntu-latest' }}
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        if: vars.IGNEUM_CI_RUNNER != 'box'   # the box has python3 and numpy from provision.sh
        with:
          python-version: '3.12'
      - run: python3 -m pip install --quiet numpy
        if: vars.IGNEUM_CI_RUNNER != 'box'
      - name: finality_v2.py --quick (under two minutes)
        working-directory: sim
        run: time timeout 120 python3 finality_v2.py --quick > finality_quick.md
      - name: difficulty/sim.py --quick (under two minutes)
        working-directory: sim/difficulty
        run: time timeout 120 python3 sim.py --quick > difficulty_quick.md
      - uses: actions/upload-artifact@v4
        with:
          name: sim-quick-output
          path: |
            sim/finality_quick.md
            sim/difficulty/difficulty_quick.md
  site:
    name: site build, link check, identity grep
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: '22'
      - name: a headless Chromium for the text-overlap sweep (Playwright outside the tree; the gate finds it through IGNEUM_PLAYWRIGHT_DIR)
        run: |
          mkdir -p /tmp/pw && cd /tmp/pw && npm init -y >/dev/null && npm i --no-audit --no-fund playwright@1.56 | tail -1
          npx playwright install --with-deps chromium | tail -1
          echo "IGNEUM_PLAYWRIGHT_DIR=/tmp/pw" >> "$GITHUB_ENV"
      - name: the tree gate, tools/ci/pre-push.sh --ci (the same script the pre-push hook runs; one line per check, a red check prints its output)
        run: bash tools/ci/pre-push.sh --ci
      - name: public stats API answers with the documented fields (the live site; master only, the endpoints exist there after the merge)
        if: github.ref == 'refs/heads/master'
        run: node tools/ci/public-api-check.mjs https://igneum.network