Merge pull request #734 from json-c/newer-appveyor

Newer appveyor config for VS2022 etc...
Update the appveyor config to specify "image" instead of just "os", and build for VS2017, VS2019 and VS2022.

appveyor.yml

@@ -1,37 +1,125 @@
 version: '{branch}.{build}'
-os: Windows Server 2012 R2
+
+image:
+# b_toolset: v143
+  - Visual Studio 2022
+
+  # VS2015 also used for earlier VS builds
+  # aka os: Windows Server 2012 R2
+  - Visual Studio 2015
+
+  # aka os: Windows Server 2016
+# b_toolset: v141
+  - Visual Studio 2017
+
+  # aka os: Windows Server 2019
+# b_toolset: v142
+  - Visual Studio 2019
 
 platform: x64
 
-# There should be a better way to set-up a build matrix.
 environment:
   matrix:
     - b_toolset: Windows7.1SDK
-      b_config: Debug
-
-    - b_toolset: Windows7.1SDK
-      b_config: Release
 
     - b_toolset: v120
-      b_config: Debug
-
-    - b_toolset: v120
-      b_config: Release
 
     - b_toolset: v140
-      b_config: Debug
 
-    - b_toolset: v140
-      b_config: Release
+    - b_toolset: v141
+
+    - b_toolset: v142
+
+    - b_toolset: v143
+
+configuration:
+  - Debug
+  - Release
 
 build_script:
-- cmake -T %b_toolset% -DCMAKE_BUILD_TYPE=%b_config% -DCMAKE_INSTALL_PREFIX=t_install .
+- cmake -T %b_toolset% -DCMAKE_BUILD_TYPE=%CONFIGURATION% -DCMAKE_INSTALL_PREFIX=t_install .
 - cmake --build . --target install
 
+matrix:
+  exclude:
+    #  Skip release builds for all except the newest image
+    - image: Visual Studio 2015
+      configuration: Release
+
+    # In the "old" image, new toolsets aren't available:
+    - image: Visual Studio 2015
+      b_toolset: v141
+
+    - image: Visual Studio 2015
+      b_toolset: v142
+
+    - image: Visual Studio 2015
+      b_toolset: v143
+
+    # ----
+
+    - image: Visual Studio 2017
+      configuration: Release
+
+    # In the "new" images, exclude all toolsets except the relevant
+    #  one for that image:
+
+    - image: Visual Studio 2017
+      b_toolset: Windows7.1SDK
+
+    - image: Visual Studio 2017
+      b_toolset: v120
+
+    - image: Visual Studio 2017
+      b_toolset: v140
+
+    - image: Visual Studio 2017
+      b_toolset: v142
+
+    - image: Visual Studio 2017
+      b_toolset: v143
+
+    # ----
+
+    - image: Visual Studio 2019
+      configuration: Release
+
+    - image: Visual Studio 2019
+      b_toolset: Windows7.1SDK
+
+    - image: Visual Studio 2019
+      b_toolset: v120
+
+    - image: Visual Studio 2019
+      b_toolset: v140
+
+    - image: Visual Studio 2019
+      b_toolset: v141
+
+    - image: Visual Studio 2019
+      b_toolset: v143
+
+    # ----
+
+    - image: Visual Studio 2022
+      b_toolset: Windows7.1SDK
+
+    - image: Visual Studio 2022
+      b_toolset: v120
+
+    - image: Visual Studio 2022
+      b_toolset: v140
+
+    - image: Visual Studio 2022
+      b_toolset: v141
+
+    - image: Visual Studio 2022
+      b_toolset: v142
+
 after_build:
 - cd t_install
-- 7z a ../json-c.win32.%b_toolset%.%b_config%.zip *
+- 7z a ../json-c.win32.%b_toolset%.%CONFIGURATION%.zip *
 
 artifacts:
-- path: json-c.win32.%b_toolset%.%b_config%.zip
-  name: json-c.win32.%b_toolset%.%b_config%.zip
+- path: json-c.win32.%b_toolset%.%CONFIGURATION%.zip
+  name: json-c.win32.%b_toolset%.%CONFIGURATION%.zip