set up appveyor and improve qt version finding

.appveyor.yml

@@ -0,0 +1,67 @@
+version: '{branch}-{build}'
+# build Configuration
+configuration: Release
+# clone directory
+clone_folder: C:\Textractor
+# Do not build feature branch with open Pull Requests
+skip_branch_with_pr: false
+# environment variables
+environment:
+  matrix:
+#  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+#    platform: x64
+#    msvc_name: Visual Studio 15 2017 Win64
+#    suffix: Win64
+#  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+#    platform: Win32
+#    msvc_name: Visual Studio 15 2017
+#    suffix: Win32
+  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+    msvc_name: Visual Studio 16 2019
+    platform: x64
+    qtbin: msvc2017_64
+    suffix: x64
+  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+    msvc_name: Visual Studio 16 2019
+    platform: Win32
+    qtbin: msvc2017
+    suffix: x86
+
+before_build:
+  - cd C:\
+  - mkdir %suffix%
+  - cd %suffix%
+  - cmake -G "%msvc_name%" -A "%platform%" -DQt5_DIR="C:\Qt\5.13\%qtbin%\lib\cmake\Qt5" -DCMAKE_BUILD_TYPE="Release" ../Textractor
+
+build:
+  project: C:\%suffix%\Textractor.sln
+  parallel: true
+  verbosity: normal
+
+#after_test:
+#  - ps: if($env:APPVEYOR_REPO_BRANCH -eq "release" -and $env:packaging -eq "true") { $env:PUBLISH_BINARY = 'true' }
+#  - ps: if($env:APPVEYOR_REPO_COMMIT_MESSAGE.contains('[publish]') -and $env:packaging -eq "true") { $env:PUBLISH_BINARY = 'true' }
+#  - if [%PUBLISH_BINARY%]==[true] cmake --build c:\stellarium\build-%qtver%-%qtbin%\ --config %configuration% --target install
+#  - if [%PUBLISH_BINARY%]==[true] appveyor DownloadFile https://github.com/Stellarium/stellarium-data/releases/download/qt-5.6/libGLES-%suffix%.zip -FileName c:\stellarium\build-%qtver%-%qtbin%\libGLES.zip
+#  - if [%PUBLISH_BINARY%]==[true] 7z e c:\stellarium\build-%qtver%-%qtbin%\libGLES.zip -aoa -oc:\stellarium-%qtver%-%qtbin%\qt5stuff
+#  - if [%PUBLISH_BINARY%]==[true] cmake --build c:\stellarium\build-%qtver%-%qtbin%\ --config %configuration% --target stellarium-installer
+#  - if [%PUBLISH_BINARY%]==[true] cd c:\stellarium\installers
+#  - if [%PUBLISH_BINARY%]==[true] for %%i in (*.exe) do appveyor PushArtifact %%i
+#
+## deployment
+#deploy:
+#- provider: Webhook
+#  url: https://app.signpath.io/API/v1/a6a9173a-feb5-41ae-8973-8ca75af5e233/Integrations/AppVeyor?ProjectKey=stellarium&SigningPolicyKey=release-signing
+#  authorization:
+#    secure: k9Hka8MA6UONiSbKZeAv5koMEljPXgEZ7o1FbvEHRlPFFHMGzQcS6MQsvy53VxeTpG4Kw98FU0VXusbXoKLzug==
+#  on:
+#    branch: release
+#    packaging: true
+
+notifications:
+- provider: Email
+  to:
+  - akashmozumdar@gmail.com
+  on_build_success: false
+  on_build_failure: true
+  on_build_status_changed: true

cmake/QtUtils.cmake

@@ -1,12 +1,12 @@
 macro(msvc_registry_search)
-    IF(MSVC)
+	if(NOT DEFINED Qt5_DIR AND MSVC)
 		# look for user-registry pointing to qtcreator
 		get_filename_component(QT_BIN [HKEY_CURRENT_USER\\Software\\Classes\\Applications\\QtProject.QtCreator.pro\\shell\\Open\\Command] PATH)
 
 		# get root path so we can search for 5.3, 5.4, 5.5, etc
 		string(REPLACE "/Tools" ";" QT_BIN "${QT_BIN}")
 		list(GET QT_BIN 0 QT_BIN)
-        file(GLOB QT_VERSIONS "${QT_BIN}/5.*")
+		file(GLOB QT_VERSIONS "${QT_BIN}/5.1*")
 		list(SORT QT_VERSIONS)
 
 		# assume the latest version will be last alphabetically
@@ -17,42 +17,35 @@ macro(msvc_registry_search)
 		# fix any double slashes which seem to be common
 		string(REPLACE "//" "/"  QT_VERSION "${QT_VERSION}")
 
-        if(MSVC_VERSION GREATER_EQUAL "1910")
+		if(MSVC_VERSION GREATER_EQUAL 1920)
-            set(QT_MSVC "2017")
+			set(QT_MSVC 2019)
-        elseif(MSVC_VERSION GREATER_EQUAL "1900")
+		elseif(MSVC_VERSION GREATER_EQUAL 1910)
-            set(QT_MSVC "2015")
+			set(QT_MSVC 2017)
+		elseif(MSVC_VERSION GREATER_EQUAL 1900)
+			set(QT_MSVC 2015)
 		else()
-            # Latest QT versions >5.10 provides only 2015 and 2017 prebuilt binaries
 			message(WARNING "Unsupported MSVC toolchain version")
 		endif()
 
 		if(QT_MSVC)
-            # check for 64-bit target
 			if(CMAKE_CL_64)
-                SET(QT_MSVC "${QT_MSVC}_64")
+				SET(QT_SUFFIX "_64")
+			else()
+				set(QT_SUFFIX "")
 			endif()
 
-            set(QT_TOOLCHAIN "${QT_VERSION}/msvc${QT_MSVC}")
+			# MSVC 2015+ is only backwards compatible
-            if(EXISTS ${QT_TOOLCHAIN})
+			if(EXISTS "${QT_VERSION}/msvc${QT_MSVC}${QT_SUFFIX}")
-                set(Qt5_DIR "${QT_TOOLCHAIN}/lib/cmake/Qt5")
+				set(Qt5_DIR "${QT_VERSION}/msvc${QT_MSVC}${QT_SUFFIX}/lib/cmake/Qt5")
-            elseif(QT_MSVC EQUAL "2017")
+			elseif(QT_MSVC GREATER_EQUAL 2019 AND EXISTS "${QT_VERSION}/msvc2017${QT_SUFFIX}")
-                #2017 is ABI compatible with 2015
+				set(Qt5_DIR "${QT_VERSION}/msvc2017${QT_SUFFIX}/lib/cmake/Qt5")
-                if(CMAKE_CL_64)
+			elseif(QT_MSVC GREATER_EQUAL 2017 AND EXISTS "${QT_VERSION}/msvc2015${QT_SUFFIX}")
-                    set(QT_TOOLCHAIN "${QT_VERSION}/msvc2015_64")
+				set(Qt5_DIR "${QT_VERSION}/msvc2015${QT_SUFFIX}/lib/cmake/Qt5")
-                else()
-                    set(QT_TOOLCHAIN "${QT_VERSION}/msvc2015")
-                endif()
-
-                if(EXISTS ${QT_TOOLCHAIN})
-                    set(Qt5_DIR "${QT_TOOLCHAIN}/lib/cmake/Qt5")
-                else()
-                    message(WARNING "Required QT5 toolchain is not installed")
-                endif()
 			else()
 				message(WARNING "Required QT5 toolchain is not installed")
 			endif()
 		endif()
-    ENDIF()
+	endif()
 endmacro()
 
 macro(find_qt5)