Merge branch 'test-appveyor-vs2015'

Author: bluekyu

.appveyor.yml

@@ -16,6 +16,7 @@ skip_commits:
 
 # Build worker image (VM template)
 image:
+- Visual Studio 2015
 - Visual Studio 2017
 
 # set clone depth
@@ -33,18 +34,28 @@ init:
 - git --version
 - python --version
 - cmake --version
+- ps: >-
+    if ($env:APPVEYOR_BUILD_WORKER_IMAGE -eq "Visual Studio 2015") {
+        $env:CMAKE_GENERATOR="Visual Studio 14 2015 Win64"
+    } else {
+        $env:CMAKE_GENERATOR="Visual Studio 15 2017 Win64"
+    }
 
 # environment variables
 environment:
     CMAKE_PREFIX_PATH: C:\projects\_install;
-    CMAKE_GENERATOR: Visual Studio 15 2017 Win64
     BOOST_ROOT: C:\Libraries\boost_1_65_1
     PATH: C:\Python36-x64;%PATH%
     FREETYPE_DIR: C:\projects\_install\panda3d-thirdparty\win-libs-vc14-x64\freetype
 
 # this is how to allow failing jobs in the matrix
 matrix:
     fast_finish: true   # set this flag to immediately finish build once one of the jobs fails.
+    exclude:
+        - configuration: Debug
+          image: Visual Studio 2015
+        - configuration: RelWithDebInfo
+          image: Visual Studio 2015
 
 # scripts that run after cloning repository
 install:
@@ -124,7 +135,7 @@ deploy: off
 # on successful build
 on_success:
 - ps: >-
-    if (($env:CONFIGURATION -eq "Release") -and ($env:APPVEYOR_REPO_BRANCH -eq "master")) {
+    if (($env:APPVEYOR_BUILD_WORKER_IMAGE -eq "Visual Studio 2017") -and ($env:CONFIGURATION -eq "Release") -and ($env:APPVEYOR_REPO_BRANCH -eq "master")) {
         Start-AppveyorBuild -ApiKey $env:api_key -ProjectSlug 'rpcpp-plugins' -EnvironmentVariables @{
             TRIGGER_NAME = $env:APPVEYOR_PROJECT_NAME
             TRIGGER_BUILD_VERSION = $env:APPVEYOR_BUILD_VERSION