Test if package can be required

.github/workflows/ci.yml

@@ -7,6 +7,18 @@ on:
       - 'refs/heads/v[0-9]+.[0-9]+.[0-9]+'
   pull_request:
 jobs:
+  package-name:
+    name: Package Name
+    runs-on: ubuntu-latest
+    needs:
+      - lint-json
+    outputs:
+      package-name: ${{ steps.package-name.outputs.package-name }}
+    steps:
+      - uses: actions/checkout@v1
+      - id: package-name
+        run: |
+          printf "::set-output name=package-name::[\"%s\"]" $(docker run --rm -v "`pwd`:`pwd`" jess/jq jq -r -c '.name' "${GITHUB_WORKSPACE}/composer.json")
   supported-versions-matrix:
     name: Supported Versions Matrix
     runs-on: ubuntu-latest
@@ -63,6 +75,31 @@ jobs:
       - name: Install Dependencies
         run: composer update --ansi --no-progress --no-interaction --prefer-dist -o
         if: matrix.composer == 'highest'
+  can-require:
+    name: Test we can require "${{ matrix.package-name }}" on PHP ${{ matrix.php }}
+    strategy:
+      fail-fast: false
+      matrix:
+        php: ${{ fromJson(needs.supported-versions-matrix.outputs.version) }}
+        package-name: ${{ fromJson(needs.package-name.outputs.package-name) }}
+    needs:
+      - lint-yaml
+      - lint-json
+      - package-name
+      - supported-versions-matrix
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/wyrihaximusnet/php:${{ matrix.php }}-nts-buster-dev-root
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          path: checked_out_package
+      - name: Set Up composer.json
+        run: |
+          echo "{\"repositories\": [{\"name\": \"${{ matrix.package-name }}\",\"type\": \"path\",\"url\": \"./checked_out_package\"}]}" > composer.json
+      - name: Require package
+        run: |
+          composer require "${{ matrix.package-name }}:dev-${GITHUB_SHA}" --no-progress --ansi --no-interaction --prefer-dist -o
   qa:
     name: Run ${{ matrix.check }} on PHP ${{ matrix.php }} with ${{ matrix.composer }} dependency preference
     strategy:
@@ -209,6 +246,7 @@ jobs:
     needs:
       - lint-yaml
       - lint-json
+      - can-require
       - qa
       - tests-directly-on-os
       - qodana