upstream-mattermost/.github/workflows/webapp-ci-cache-warm.yml

# Warms the webapp node_modules cache used by webapp CI and the E2E v2 templates
# (via .github/actions/webapp-setup). Runs once per day on master so the cache is
# fresh before CI runs; webapp CI restores it read-only, though the E2E v2
# templates also populate it within their own runs.
#
# The cache is keyed on the OS and a hash of webapp/package-lock.json. PRs that
# change the lockfile miss the exact key and fall back to the most recent warm
# entry via restore-keys, then reconcile the delta with `make node_modules`.
#
# The E2E ~/.npm registry cache is warmed separately by e2e-ci-cache-warm.yml.
name: Webapp CI Cache Warm

on:
  schedule:
    - cron: "0 1 * * *" # Daily 1am UTC — 1 h before webapp CI typically runs
  workflow_dispatch:

# Prevent an overlapping manual dispatch and scheduled run from both missing the
# lookup and then racing to reserve the same cache key.
concurrency:
  group: webapp-ci-cache-warm
  cancel-in-progress: false

permissions:
  contents: read
  actions: write # required to save the Actions cache

jobs:
  warm:
    name: Warm Webapp node_modules Cache
    runs-on: ubuntu-24.04
    if: github.ref == 'refs/heads/master'
    # Bound a hung run so it can't hold the concurrency group for the default
    # 6-hour timeout and block subsequent warm runs.
    timeout-minutes: 60
    steps:
      - name: Checkout mattermost project
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          persist-credentials: false

      - name: Check if node_modules cache already warm
        id: node-modules-check
        uses: actions/cache/restore@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
        with:
          path: |
            webapp/node_modules
            webapp/channels/node_modules
            webapp/platform/client/node_modules
            webapp/platform/components/node_modules
            webapp/platform/shared/node_modules
            webapp/platform/types/node_modules
          key: node-modules-${{ runner.os }}-${{ hashFiles('webapp/package-lock.json') }}
          lookup-only: true

      - name: ci/setup-node
        if: steps.node-modules-check.outputs.cache-hit != 'true'
        uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
        with:
          node-version-file: ".nvmrc"

      - name: Install node modules
        if: steps.node-modules-check.outputs.cache-hit != 'true'
        working-directory: webapp
        run: make node_modules

      - name: Save node_modules cache
        if: steps.node-modules-check.outputs.cache-hit != 'true'
        uses: actions/cache/save@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
        with:
          path: |
            webapp/node_modules
            webapp/channels/node_modules
            webapp/platform/client/node_modules
            webapp/platform/components/node_modules
            webapp/platform/shared/node_modules
            webapp/platform/types/node_modules
          key: node-modules-${{ runner.os }}-${{ hashFiles('webapp/package-lock.json') }}