CI: Move AppVeyor install commands to a script file

Move the AppVeyor install scripts to a separate script file. This
shortens the appveyor.yml file and makes it easier to introduce new
install scripts for other build environments.

There is one minor change to the install script, and that was to change
directory back to the obs-studio git root directory.

CI/install-script-win.cmd

+if exist dependencies2017.zip (curl -kLO https://obsproject.com/downloads/dependencies2017.zip -f --retry 5 -z dependencies2017.zip) else (curl -kLO https://obsproject.com/downloads/dependencies2017.zip -f --retry 5 -C -)
+if exist vlc.zip (curl -kLO https://obsproject.com/downloads/vlc.zip -f --retry 5 -z vlc.zip) else (curl -kLO https://obsproject.com/downloads/vlc.zip -f --retry 5 -C -)
+if exist cef_binary_%CEF_VERSION%_windows32.zip (curl -kLO https://obsproject.com/downloads/cef_binary_%CEF_VERSION%_windows32.zip -f --retry 5 -z cef_binary_%CEF_VERSION%_windows32.zip) else (curl -kLO https://obsproject.com/downloads/cef_binary_%CEF_VERSION%_windows32.zip -f --retry 5 -C -)
+if exist cef_binary_%CEF_VERSION%_windows64.zip (curl -kLO https://obsproject.com/downloads/cef_binary_%CEF_VERSION%_windows64.zip -f --retry 5 -z cef_binary_%CEF_VERSION%_windows64.zip) else (curl -kLO https://obsproject.com/downloads/cef_binary_%CEF_VERSION%_windows64.zip -f --retry 5 -C -)
+7z x dependencies2017.zip -odependencies2017
+7z x vlc.zip -ovlc
+7z x cef_binary_%CEF_VERSION%_windows32.zip -oCEF_32
+7z x cef_binary_%CEF_VERSION%_windows64.zip -oCEF_64
+set DepsPath32=%CD%\dependencies2017\win32
+set DepsPath64=%CD%\dependencies2017\win64
+set VLCPath=%CD%\vlc
+set QTDIR32=C:\Qt\5.11.1\msvc2015
+set QTDIR64=C:\Qt\5.11.1\msvc2017_64
+set CEF_32=%CD%\CEF_32\cef_binary_%CEF_VERSION%_windows32
+set CEF_64=%CD%\CEF_64\cef_binary_%CEF_VERSION%_windows64
+set build_config=RelWithDebInfo
+mkdir build build32 build64
+cd ./build32
+cmake -G "Visual Studio 15 2017" -DCOPIED_DEPENDENCIES=false -DCOPY_DEPENDENCIES=true -DBUILD_CAPTIONS=true -DCOMPILE_D3D12_HOOK=true -DBUILD_BROWSER=true -DCEF_ROOT_DIR=%CEF_32% ..
+cd ../build64
+cmake -G "Visual Studio 15 2017 Win64" -DCOPIED_DEPENDENCIES=false -DCOPY_DEPENDENCIES=true -DBUILD_CAPTIONS=true -DCOMPILE_D3D12_HOOK=true -DBUILD_BROWSER=true -DCEF_ROOT_DIR=%CEF_64% ..
+cd ..

appveyor.yml

@@ -5,27 +5,7 @@ environment:
 
 install:
   - git submodule update --init --recursive
-  - if exist dependencies2017.zip (curl -kLO https://obsproject.com/downloads/dependencies2017.zip -f --retry 5 -z dependencies2017.zip) else (curl -kLO https://obsproject.com/downloads/dependencies2017.zip -f --retry 5 -C -)
-  - if exist vlc.zip (curl -kLO https://obsproject.com/downloads/vlc.zip -f --retry 5 -z vlc.zip) else (curl -kLO https://obsproject.com/downloads/vlc.zip -f --retry 5 -C -)
-  - if exist cef_binary_%CEF_VERSION%_windows32.zip (curl -kLO https://obsproject.com/downloads/cef_binary_%CEF_VERSION%_windows32.zip -f --retry 5 -z cef_binary_%CEF_VERSION%_windows32.zip) else (curl -kLO https://obsproject.com/downloads/cef_binary_%CEF_VERSION%_windows32.zip -f --retry 5 -C -)
-  - if exist cef_binary_%CEF_VERSION%_windows64.zip (curl -kLO https://obsproject.com/downloads/cef_binary_%CEF_VERSION%_windows64.zip -f --retry 5 -z cef_binary_%CEF_VERSION%_windows64.zip) else (curl -kLO https://obsproject.com/downloads/cef_binary_%CEF_VERSION%_windows64.zip -f --retry 5 -C -)
-  - 7z x dependencies2017.zip -odependencies2017
-  - 7z x vlc.zip -ovlc
-  - 7z x cef_binary_%CEF_VERSION%_windows32.zip -oCEF_32
-  - 7z x cef_binary_%CEF_VERSION%_windows64.zip -oCEF_64
-  - set DepsPath32=%CD%\dependencies2017\win32
-  - set DepsPath64=%CD%\dependencies2017\win64
-  - set VLCPath=%CD%\vlc
-  - set QTDIR32=C:\Qt\5.11.1\msvc2015
-  - set QTDIR64=C:\Qt\5.11.1\msvc2017_64
-  - set CEF_32=%CD%\CEF_32\cef_binary_%CEF_VERSION%_windows32
-  - set CEF_64=%CD%\CEF_64\cef_binary_%CEF_VERSION%_windows64
-  - set build_config=RelWithDebInfo
-  - mkdir build build32 build64
-  - cd ./build32
-  - cmake -G "Visual Studio 15 2017" -DCOPIED_DEPENDENCIES=false -DCOPY_DEPENDENCIES=true -DBUILD_CAPTIONS=true -DCOMPILE_D3D12_HOOK=true -DBUILD_BROWSER=true -DCEF_ROOT_DIR=%CEF_32% ..
-  - cd ../build64
-  - cmake -G "Visual Studio 15 2017 Win64" -DCOPIED_DEPENDENCIES=false -DCOPY_DEPENDENCIES=true -DBUILD_CAPTIONS=true -DCOMPILE_D3D12_HOOK=true -DBUILD_BROWSER=true -DCEF_ROOT_DIR=%CEF_64% ..
+  - cmd: C:\projects\obs-studio\CI\install-script-win.cmd
 
 build_script:
   - call msbuild /m /p:Configuration=%build_config% C:\projects\obs-studio\build32\obs-studio.sln /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll"