Separate check scripts to their own repository (#567)

* Remove scripts

* Update workflows to use checks repo

* Add explanation about naming of base branch

This only concerns private tests with PRs created against a base branch in
another non-official repo.

* Fix checkout paths

* Move TESTING to a less confusing location

.github/TESTING

@@ -0,0 +1,10 @@
+The name of the branch plays a role in the tests run when changes are
+submitted. For this reason, when modifying the workflows in ./.github, if you
+want to test them prior to submission, the PR must be tested against a branch that
+exists also in the `alire-index-checks` repo, e.g., 'stable-1.2' or 'devel-1.2'
+
+Normally you'll want to use the latest stable or devel branch.
+
+E.g., if you modify a workflow in the `alire-index` repo and want to test it
+privately, you can do so in your own account, but using the same `stable-x.x`
+base branch for your private PR.

.github/workflows/build-crate.yml

@@ -1,5 +1,11 @@
+# Please read the TESTING file before modifying this file
+
 name: Build Crate
 
+env:
+  CHECKS_ORG: alire-project
+  CHECKS_REPO: alire-index-checks
+
 on:
   pull_request:
     paths:
@@ -59,6 +65,13 @@ jobs:
         # changed files detectors (in both scripts/gh-build-crate.sh and
         # check-author action).
 
+    - name: Check out alire-index-checks
+      uses: actions/checkout@v3
+      with:
+        repository: ${{env.CHECKS_ORG}}/${{env.CHECKS_REPO}}
+        ref: ${{github.base_ref}}
+        path: ${{env.CHECKS_REPO}}
+
     - name: Update system repositories
       if: matrix.os == 'ubuntu-latest'
       run: sudo apt update
@@ -93,7 +106,7 @@ jobs:
       uses: mosteo/actions@docker-run/v1
       with:
         image: alire/gnat:${{matrix.tag}}
-        command: scripts/gh-build-crate.sh
+        command: ${{env.CHECKS_REPO}}/scripts/gh-build-crate.sh
         params: -v ${{ github.workspace }}/alire_install/bin/alr:/usr/bin/alr
 
     - name: Install tar from msys2 (Windows) # Git tar in Actions VM does not seem to work)
@@ -102,5 +115,5 @@ jobs:
 
     - name: Test crate (Windows/MacOS)
       if: matrix.os != 'ubuntu-latest' # native testing in Windows/MacOS
-      run: scripts/gh-build-crate.sh
+      run: ${{env.CHECKS_REPO}}/scripts/gh-build-crate.sh
       shell: bash

.github/workflows/build-native.yml

@@ -1,6 +1,12 @@
+# Please read the TESTING file before modifying this file
+
 name: Toolchain
 # Build the submitted crate with a native toolchain from Alire
 
+env:
+  CHECKS_ORG: alire-project
+  CHECKS_REPO: alire-index-checks
+
 on:
   pull_request:
     paths:
@@ -30,6 +36,13 @@ jobs:
         # changed files detectors (in both scripts/gh-build-crate.sh and
         # check-author action).
 
+    - 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}}
+
     # For the devel branch we need a compiler available to build alr in
     # setup-alire. We will be able to get rid of this once composite actions
     # support conditional steps.
@@ -63,5 +76,5 @@ jobs:
       run: C:\Users\runneradmin\.cache\alire\msys64\usr\bin\pacman --noconfirm -S tar
 
     - name: Test crate
-      run: scripts/gh-build-crate.sh
+      run: ${{env.CHECKS_REPO}}/scripts/gh-build-crate.sh
       shell: bash

.github/workflows/diff-release.yml

@@ -1,8 +1,14 @@
+# Please read the TESTING file before modifying this file
+
 # Show differences between the submitted manifest and the previous
 # release of the same crate, to enable easier catching of problems
 
 name: Diff release
 
+env:
+  CHECKS_ORG: alire-project
+  CHECKS_REPO: alire-index-checks
+
 on:
   pull_request:
     paths:
@@ -23,6 +29,13 @@ jobs:
         # need the full history or else grafted partial branches confuse the
         # changed files detector
 
+    - 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 stable `alr`
       if: contains(github.base_ref, 'stable-')
       uses: alire-project/setup-alire@v1
@@ -49,5 +62,5 @@ jobs:
         branch: master
 
     - name: Diff releases
-      run: scripts/diff-release.sh || true # No deal breaker if failed
+      run: ${{env.CHECKS_REPO}}/scripts/diff-release.sh || true # No deal breaker if failed
       shell: bash