Enable aarch64 builds

.github/workflows/test-cache.yml

@@ -19,7 +19,7 @@ jobs:
           - ubuntu-latest
           - windows-latest
         config:
-          - version: '2.0.1'
+          - version: '2.0.2'
             branch:  ''
           - version: '1.2.2'
             branch:  ''

action.yml

@@ -6,7 +6,7 @@ inputs:
   version:
     description: Use this argument to install a stable or nightly release. Use a version number without v prefix, e.g., 1.0.1, 1.1.0, or 'nightly'. This argument will be ignored if a branch argument is supplied. Defaults to the latest stable release.
     required: false
-    default: '2.0.1'
+    default: '2.0.2'
     # Also to be updated in test-cache-yml
   branch:
     description: Use this argument to install a development branch (e.g., master).
@@ -113,21 +113,25 @@ runs:
       shell: bash
       run: |
         os_lower=$(echo "${{ runner.os }}" | tr '[:upper:]' '[:lower:]')
-        alr_version=2.0.1
-        curl -L -O https://github.com/alire-project/alire/releases/download/v${alr_version}/alr-${alr_version}-bin-x86_64-${os_lower}.zip
-        unzip -o alr-${alr_version}-bin-x86_64-${os_lower}.zip "bin/alr*" -d tmp_alr
-        rm alr-${alr_version}-bin-x86_64-${os_lower}.zip
+        case "${{ runner.arch }}" in
+          ARM64) arch=aarch64;;
+          X64)   arch=x86_64;;
+          *)     echo "Unknown arch: ${{runner.arch}}"; exit 1;;
+        esac
+        alr_version=2.0.2
+        alr_filename=alr-${alr_version}-bin-${arch}-${os_lower}.zip
+        curl -L -O https://github.com/alire-project/alire/releases/download/v${alr_version}/${alr_filename}
+        unzip -o ${alr_filename} "bin/alr*" -d tmp_alr
+        rm ${alr_filename}
         echo "$(pwd -W 2>/dev/null || pwd)/tmp_alr/bin" >> $GITHUB_PATH
 
     # Perform the actual `alr install` and remove the `alr` just used to avoid
     # conflicts with the `alr` being built.
-    # TODO: we use gnat^13 because there seems to be some trouble with gnat^14
-    # on macOS. Revisit this when the issue is resolved.
     - name: Install GNAT (II)
       if: steps.need-GNAT.outputs.need == 'true'
       shell: bash
       run: |
-        alr install gnat_native^13 gprbuild^22 --prefix=$PWD/setup_alire_prefix
+        alr install gnat_native gprbuild --prefix=$PWD/setup_alire_prefix
         echo REMOVAL TARGET: $(which alr)
         rm -rf tmp_alr && echo REMOVED stable alr used for toolchain install