New check author workflow (#808)

* New check author workflow

* Fix checkout of alire-index-checks

.github/workflows/authorship.yml

@@ -0,0 +1,38 @@
+name: Check Author
+
+env:
+  CHECKS_ORG: alire-project
+  CHECKS_REPO: alire-index-checks
+
+on:
+  pull_request:
+    paths:
+      - 'index/**.toml'
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+        # Needed to be able to diff and obtain changed files. Furthermore, we
+        # need the full history or else grafted partial branches confuse the
+        # changed files detectors.
+
+    - name: Check out alire-index-checks
+      uses: actions/checkout@v3
+      with:
+        repository: ${{env.CHECKS_ORG}}/${{env.CHECKS_REPO}}
+        ref: ${{github.base_ref}}
+        path: ${{env.CHECKS_REPO}}
+
+    - name: Set up nightly `alr`
+      uses: alire-project/setup-alire@v2
+      with:
+        version: nightly
+        toolchain: --disable-assistant
+
+    - name: Test authorship
+      run: ${{env.CHECKS_REPO}}/scripts/check-author.sh "${{ github.event.pull_request.user.login }}"
+      shell: bash

.github/workflows/check-index.yml

@@ -1,4 +1,4 @@
-name: Check PR
+name: Check Index
 on: pull_request
 jobs:
   build:
@@ -6,10 +6,6 @@ jobs:
     steps:
     - uses: actions/checkout@master
 
-    - uses: alire-project/check-author@master
-      with:
-        repo-token: "${{ secrets.GITHUB_TOKEN }}"
-
     - name: Set up stable `alr`
       if: contains(github.base_ref, 'stable-')
       uses: alire-project/setup-alire@v2