rework this action

.github/workflows/dev.yml

@@ -7,32 +7,19 @@ on:
 
 jobs:
   test:
-    runs-on: ${{ matrix.os }}
-
+    runs-on: ubuntu-22.04
     strategy:
-      fail-fast: false
       matrix:
-        os:
-        - ubuntu-18.04
-        - ubuntu-20.04
-        - macos-10.15
         ref:
         - develop
         - b35d6d13a7359f42abc1c468ea671fcc0daabffd
-        concretizer:
-        - original
-        - clingo
-
     steps:
       - uses: actions/[email protected]
-
       - name: Set up Spack
         uses: ./
         with:
-          os: ${{ matrix.os }}
           ref: ${{ matrix.ref }}
-          concretizer: ${{ matrix.concretizer }}
+          buildcache: true
       - run: spack --version
-      - run: spack config blame config
-      - run: spack --debug install zlib
-      - run: which patchelf
+      - run: spack config blame mirrors
+      - run: spack install gmake

action.yml

@@ -1,37 +1,33 @@
 name: "Setup Spack"
-description: "Setup Spack and its dependencies"
+description: "Setup Spack"
 inputs:
-  os:
-    description: "Operating system (ubuntu-18.04, ubuntu-20.04, macos-10.15)"
-    required: true
   ref:
-    description: "Version of Spack (develop, v0.16.2)"
+    description: "Version of Spack (git ref: develop, releases/v0.21, ...)"
     required: false
     default: develop
-  concretizer:
-    description: "Version of Spack (clingo, original)"
+  buildcache:
+    description: "Enable the Github Action build cache"
     required: false
-    default: clingo
+    default: "true"
+  path:
+    description: "Path to Spack"
+    required: false
+    default: "spack"
 runs:
   using: "composite"
   steps:
-    - name: Install Spack's dependencies
-      run: |
-        curl -LfSs -o spack.tar.zstd https://github.com/haampie-spack/setup-spack/releases/download/develop/${{ inputs.os }}.tar.zst
-        TAR=tar
-        if [ "$RUNNER_OS" == macOS ]; then TAR=gtar; fi
-        $TAR --use-compress-program=zstd -xf spack.tar.zstd -C ~/
-        echo "$HOME/.setup-spack/view/bin" >> $GITHUB_PATH
-      shell: bash
-    - name: Install Spack itself
-      run: |
-        git clone https://github.com/spack/spack.git
-        (cd spack && git checkout "${{ inputs.ref }}")
-        echo "$PWD/spack/bin" >> $GITHUB_PATH
-        mkdir ~/.spack
-        echo "config:"                                   > ~/.spack/config.yaml
-        echo "  concretizer: ${{ inputs.concretizer }}" >> ~/.spack/config.yaml
-      shell: bash
-    - name: Show version
-      run: spack --version
-      shell: bash
+  - name: Checkout Spack
+    uses: actions/checkout@v3
+    with:
+      repository: spack/spack
+      path: ${{ inputs.path }}
+      ref: ${{ inputs.ref }}
+
+  - name: Setup Spack
+    run: echo "$PWD/spack/bin" >> "$GITHUB_PATH"
+    shell: sh
+
+  - name: Setup build cache
+    if: ${{ inputs.buildcache == 'true' }}
+    run: spack mirror add github-actions-buildcache oci://ghcr.io/spack/github-actions-buildcache
+    shell: sh

readme.md

@@ -1,92 +1,27 @@
 # Setup Spack in Github Actions
 
-Set up the [Spack package manager](https://github.com/spack/spack).
+Set up the [Spack package manager](https://github.com/spack/spack) with a default build cache to
+speed up your actions.
 
 ## Example 1 (`spack install`)
 
 ```yaml
 jobs:
   build:
-    runs-on: ${{ matrix.os }}
-
-    strategy:
-      fail-fast: false
-      matrix:
-        os:
-        - ubuntu-18.04
-        - ubuntu-20.04
-        - macos-10.15
-        concretizer:
-        - original
-        - clingo
-
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/[email protected]
       - name: Set up Spack
         uses: haampie-spack/[email protected]
         with:
-          os: ${{ matrix.os }}
-          concretizer: ${{ matrix.concretizer }}
-          ref: develop
+          ref: develop  # default
+          buildcache: true  # default
       - run: |
         spack --version
-        spack install zlib
+        spack install gmake
 ```
 
-## Example 2 (caching binaries)
-
-Assuming you have an environment file in `example-environment/spack.yaml`, you
-can enable caching by using the manifest file `spack.lock` as a hash key.
-
-```yaml
-jobs:
-  latest-stable:
-    runs-on: ${{ matrix.os }}
-
-    strategy:
-      fail-fast: false
-      matrix:
-        os:
-        - ubuntu-18.04
-        - ubuntu-20.04
-        - macos-10.15
-
-    steps:
-      - uses: actions/[email protected]
-
-      - name: Set up Spack
-        uses: haampie-spack/[email protected]
-        with:
-          os: ${{ matrix.os }}
-          ref: develop
-          concretizer: clingo
-
-      - name: Concretize environment
-        run: |
-          spack --color always -e ./example-environment concretize -f
-
-      - name: Restore Spack cache
-        uses: actions/cache@v2
-        with:
-          path: ~/.spack-ci
-          key: ${{ matrix.os }}-spack-${{ hashFiles('**/spack.lock') }}
-          restore-keys: |
-            ${{ matrix.os }}-spack
-
-      - name: Install environment
-        run: |
-          spack --color always -e ./example-environment install -j3 -v
-```
-
-## How is Spack bootstrapped?
-
-This environment is built
-
-https://github.com/haampie-spack/setup-spack/blob/rebuild-spack/spack.yaml
-
-and the binaries are uploaded as release assets to
-
-https://github.com/haampie-spack/setup-spack/releases/tag/develop
+## Caching your own binaries
 
-Todo:
-- [ ] Add checksum verification
+See https://github.com/spack/github-actions-buildcache for details on how to cache binaries you've
+built yourself.