refresh-dev-cache.yml

name: Refresh Dev Cache ♻️

# We need this workflow to ensure that MIX_ENV=dev caches are available when
# the CI workflow runs for a tagged build. This is due to a combination of
# several factors, so it's worthy of a wordy explanation.
#
# The actions/cache step stores the caches per-branch and if the cache key misses
# for a branch, it will try to find a cache from its default branch (master).
# So, when we run CI for a new branch or a new tag, there will be a cache miss
# and the cache step will try to find a cache from the master branch.
# The problem is, we only build with MIX_ENV=dev when a tag is pushed. That
# means our main CI workflow never builds a dev cache in the master branch.
# When we push a new tag for a release, the actions/cache step will always miss
# and then check master for a dev cache. We need this workflow to ensure that
# it will find a recent dev cache.
#
# Many of the steps are duplicated between this workflow and the
# publish-hex-package job in the Actions CI workflow.

on:
  push:
    branches:
      - master

# Would like to run this as a scheduled workflow, but that is not currently
# supported by the actions/cache action.

env:
  CUATRO_HEX_KEY: ${{ secrets.CUATRO_HEX_KEY }}

jobs:
  refresh-dev-cache:
    name: Refresh Dev Cache
    runs-on: ubuntu-20.04
    env:
      MIX_ENV: dev

    steps:
    - name: Checkout
      uses: actions/checkout@v4

    - name: Determine the elixir version
      run: echo "ELIXIR_VERSION=$(grep -h elixir .tool-versions | awk '{ print $2 }' | awk -F - '{print $1}')" >> $GITHUB_ENV

    - name: Determine the otp version
      run: echo "OTP_VERSION=$(grep -h erlang .tool-versions | awk '{ print $2 }')" >> $GITHUB_ENV

    - name: Setup Elixir and Erlang versions
      uses: erlef/setup-beam@v1
      with:
        elixir-version: ${{ env.ELIXIR_VERSION }}
        otp-version: ${{ env.OTP_VERSION }}

    - name: Restore the deps cache
      uses: actions/cache@v4
      id: deps-cache
      with:
        path: deps
        key: ${{ runner.os }}-${{ env.ELIXIR_VERSION }}-${{ env.OTP_VERSION }}-${{ env.MIX_ENV }}-deps-mixlockhash-${{ hashFiles(format('{0}{1}', github.workspace, '/mix.lock')) }}
        restore-keys: |
          ${{ runner.os }}-${{ env.ELIXIR_VERSION }}-${{ env.OTP_VERSION }}-${{ env.MIX_ENV }}-deps-

    - name: Restore the _build cache
      uses: actions/cache@v4
      id: build-cache
      with:
        path: _build
        key: ${{ runner.os }}-${{ env.ELIXIR_VERSION }}-${{ env.OTP_VERSION }}-${{ env.MIX_ENV }}-build-mixlockhash-${{ hashFiles(format('{0}{1}', github.workspace, '/mix.lock')) }}
        restore-keys: |
          ${{ runner.os }}-${{ env.ELIXIR_VERSION }}-${{ env.OTP_VERSION }}-${{ env.MIX_ENV }}-build-

    - name: Fetch mix dependencies
      if: steps.deps-cache.outputs.cache-hit != 'true'
      run: |
        mix local.rebar --force
        mix local.hex --force
        mix hex.organization auth cuatro --key $CUATRO_HEX_KEY
        mix deps.get

    - name: Compile dependencies
      if: steps.deps-cache.outputs.cache-hit != 'true'
      run: mix deps.compile

    - name: Compile application
      run: mix compile

# Generated by Elixir.Gaas.Generators.Simple.Actions.RefreshDevCache