Steal Hydra's ci

.github/workflows/actions/setup_dev_ubuntu/action.yaml

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+name: 'Setup dev environment'
+description: 'Setup a dev environment for gh-action Ubuntu'
+inputs:
+  version_ghc:
+    description: 'GHC version needed'
+    required: false
+    default: 9.2.8
+  version_cabal:
+    description: 'Cabal version needed'
+    required: false
+    default: 3.10.1.0
+  clean_caches:
+    description: 'Should we clean old caches for this branch and keep only the last one?'
+    require: false
+    default: false
+runs:
+  using: "composite"
+  steps:
+
+    - name: "Clear old caches"
+      if: ${{ inputs.clean_caches == 'true' }}
+      shell: bash
+      run: |
+        .github/workflows/actions/setup_dev_ubuntu/clear_caches
+      env:
+          GH_TOKEN: ${{ github.token }}
+
+    - name: Cache environment setup
+      id: cache_env
+      uses: actions/cache@v3
+      with:
+        path: |
+          /usr/local/.ghcup/ghc/${{ inputs.version_ghc }}
+          /usr/local/.ghcup/bin/cabal-${{ inputs.version_cabal }}
+          /usr/local/.ghcup/bin/cabal
+          /usr/local/.ghcup/bin/ghc
+          ${{ github.workspace }}/srv/
+        key: env-${{ runner.os }}-${{ hashFiles('.github/workflows/actions/setup_dev_ubuntu/install_libraries') }}
+
+    - name: Cache cabal storage
+      id: cache_cabal
+      uses: actions/cache@v3
+      with:
+        path: |
+          ~/.cache/cabal/packages
+          ~/.local/state/cabal
+        key: cabal-${{ runner.os }}-${{ hashFiles('**/*.cabal', '**/cabal.project', '**/cabal.project.freeze') }}
+        restore-keys: cabal-${{ runner.os }}-
+
+    - name: Cache cabal compilation directory
+      id: cache_dist
+      uses: actions/cache@v3
+      with:
+        path: |
+          dist-newstyle
+        key: dist-${{ runner.os }}-${{ github.run_id }}
+        restore-keys: dist-${{ runner.os }}-
+
+    - name: "Install packages"
+      shell: bash
+      run: |
+        .github/workflows/actions/setup_dev_ubuntu/install_packages
+      env:
+        VERSION_GHC: ${{ inputs.version_ghc }}
+
+    - name: "Setup build environment"
+      if: ${{ steps.cache_env.outputs.cache-hit != 'true' }}
+      shell: bash
+      run: |
+        .github/workflows/actions/setup_dev_ubuntu/install_libraries
+
+    - name: "Setup Environment"
+      shell: bash
+      run: |
+        echo "$(realpath $PWD/srv)/bin" >> $GITHUB_PATH
+
+    - name: cabal update
+      if: ${{ steps.cache_cabal.outputs.cache-hit != 'true' }}
+      shell: bash
+      run: |
+        cabal update

.github/workflows/actions/setup_dev_ubuntu/clean_caches

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+#!/usr/bin/env bash
+
+set -euxo pipefail
+
+main() {
+  gh extension install --force actions/gh-actions-cache
+
+  local repo="$GITHUB_REPOSITORY"
+  local branch="$GITHUB_REF"
+
+  list_caches $repo $branch dist \
+  | all_but_the_first_one \
+  | delete_cache $repo $branch
+}
+
+list_caches() {
+  local repo="$1"
+  local branch="$2"
+  local cache="$3"
+  gh actions-cache list -R "$repo" -B "$branch" --key "$cache" --order desc | cut -f 1
+}
+
+all_but_the_first_one() {
+  sed 1d
+}
+
+delete_cache() {
+  local repo="$1"
+  local branch="$2"
+
+  while read cache
+  do
+    echo "I could delete this cache (but I won't) if needed: $cache" >&2
+    echo gh actions-cache delete "$cache" -R "$repo" -B "$branch" --confirm
+  done
+}
+
+main "$@"

.github/workflows/actions/setup_dev_ubuntu/install_libraries

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+#!/usr/bin/env bash
+
+set -euxo pipefail
+
+main() {
+  gh extension install --force actions/gh-actions-cache
+
+  local repo="$GITHUB_REPOSITORY"
+  local branch="$GITHUB_REF"
+
+  list_caches $repo $branch dist \
+  | all_but_the_first_one \
+  | delete_cache $repo $branch
+}
+
+list_caches() {
+  local repo="$1"
+  local branch="$2"
+  local cache="$3"
+  gh actions-cache list -R "$repo" -B "$branch" --key "$cache" --order desc | cut -f 1
+}
+
+all_but_the_first_one() {
+  sed 1d
+}
+
+delete_cache() {
+  local repo="$1"
+  local branch="$2"
+
+  while read cache
+  do
+    echo "I could delete this cache (but I won't) if needed: $cache" >&2
+    echo gh actions-cache delete "$cache" -R "$repo" -B "$branch" --confirm
+  done
+}
+
+main "$@"

.github/workflows/actions/setup_dev_ubuntu/install_packages

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+
+set -euxo pipefail
+
+main() {
+  gh extension install --force actions/gh-actions-cache
+
+  local repo="$GITHUB_REPOSITORY"
+  local branch="$GITHUB_REF"
+
+  list_caches $repo $branch dist \
+  | all_but_the_first_one \
+  | delete_cache $repo $branch
+}
+
+list_caches() {
+  local repo="$1"
+  local branch="$2"
+  local cache="$3"
+  gh actions-cache list -R "$repo" -B "$branch" --key "$cache" --order desc | cut -f 1
+}
+
+all_but_the_first_one() {
+  sed 1d
+}
+
+delete_cache() {
+  local repo="$1"
+  local branch="$2"
+
+  while read cache
+  do
+    echo "I could delete this cache (but I won't) if needed: $cache" >&2
+    echo gh actions-cache delete "$cache" -R "$repo" -B "$branch" --confirm
+  done
+}
+
+main "$@"

.github/workflows/ci.yaml

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+name: "CI"
+
+# Limit concurrent runs of this workflow within a single PR
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+on:
+  push:
+    branches:
+    - master
+    - release
+  pull_request:
+
+env:
+  LD_LIBRARY_PATH: ${{ github.workspace }}/srv/lib
+  PKG_CONFIG_PATH: ${{ github.workspace }}/srv/lib/pkgconfig
+
+jobs:
+  build:
+    name: "Build"
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: setup dev environment
+      uses: ./.github/workflows/actions/setup_dev_ubuntu
+      with:
+        clean_caches: true
+        version_ghc: 9.2.8
+
+    - name: cabal build
+      run: |
+        cabal build all
+
+  test:
+    name: "Test"
+    needs: [build]
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        include:
+          - package: cardano-lab
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: setup dev environment
+      uses: ./.github/workflows/actions/setup_dev_ubuntu
+      with:
+        version_ghc: 9.2.8
+
+    - name: ❓ Test
+      if: ${{ matrix.package != 'cardano-lab' }}
+      run: |
+        cabal test ${{ matrix.package }}
+
+
+  haddock:
+    name: "Haddock"
+    needs: [build]
+
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: setup dev environment
+      uses: ./.github/workflows/actions/setup_dev_ubuntu
+      with:
+        version_ghc: 9.2.8
+
+    - name: 📚 Documentation (Haddock)
+      run: |
+        .github/workflows/ci-haddock.sh
+
+    - name: 💾 Upload build & test artifacts
+      uses: actions/upload-artifact@v3
+      with:
+        name: haddocks
+        path: ./docs/static/haddock
+