test-cmake: Refinements for GH runners

.github/workflows/ci.yml

@@ -35,7 +35,7 @@ jobs:
       #- run: make
       #- run: make test-depend
       #- run: make test
-      - run: make test-cmake
+      - run: make test-cmake GH_RUNNER_OS=${{ runner.os }}
 
       #- name: Upload artifact
       #  uses: actions/upload-artifact@v4

test/standalone-cmake/test.sh

@@ -1,29 +1,41 @@
 #!/usr/bin/env bash 
 set -xeuo pipefail
 
-topdir=$(realpath `dirname "$0"`)
+topdir=$(dirname "$(readlink -f "$0")")
 projects=("cpp-flat")
 
 uname=`uname`
-case $uname in
-    Linux)
-        single_generators=("Unix Makefiles" "Ninja")
-        multi_generators=("Ninja Multi-Config")
-        ;;
-    Darwin)
-        single_generators=("Unix Makefiles" "Ninja")
-        multi_generators=("Xcode" "Ninja Multi-Config")
+
+single_generators=()
+multi_generators=()
+
+# Auto-detect tools on path:
+
+if [ `command -v ninja` ]; then
+    single_generators+=("Ninja")
+    multi_generators+=("Ninja Multi-Config")
+fi
+
+if [ `command -v make` ]; then
+    single_generators+=("Unix Makefiles")
+fi
+
+# Add predefined generators based on GH runner os:
+case ${GH_RUNNER_OS:-} in
+    macOS)
+        multi_generators+=("Xcode")
         ;;
-    Windows*|CYG*|MINGW*) 
-        single_generators=("Nmake Makefiles")
-        multi_generators=("Visual Studio 16 2019")
+    Windows)
+        multi_generators+=("Visual Studio 16 2019")
         ;;
     *)
-        echo "unsupported platform `uname`"
-        exit 1
         ;;
 esac
 
+echo "**** Testing Generators (after auto-detect):"
+echo "Single Generators: ${single_generators[@]}"
+echo "Multi-Config Generators: ${multi_generators[@]}"
+
 clean()
 {
     srcdir=$1