Reduce ci time (#67)

* Cache wix tools folder

* Try move installer building after tests

* Only build artifacts when a tag is created

* Try cache chocolatey deps

* Cache chocolatey binaries as well

* Cache nuget packages

appveyor.yml

@@ -3,6 +3,12 @@ configuration: Release
 
 platform: Any CPU
 
+cache:
+  - ImageSort.WindowsSetup\wix
+  - 'C:\ProgramData\chocolatey\bin -> appveyor.yml'
+  - 'C:\ProgramData\chocolatey\lib -> appveyor.yml'
+  - '%USERPROFILE%\.nuget\packages -> **\*.csproj'
+
 install:
   - choco install gitversion.portable -pre -y
 
@@ -17,11 +23,14 @@ build:
 
 after_build:
   - ps: >-
-      cd .\ImageSort.WindowsSetup\;
-      gitversion /updatewixversionfile;
-      MSBuild /p:Configuration=Release /p:Platform=x64 /p:OutputPath=..\artifacts\x64 /p:BuildProjectReferences=false;
-      MSBuild /p:Configuration=Release /p:Platform=x86 /p:OutputPath=..\artifacts\x86 /p:BuildProjectReferences=false;
-      cd ..;
+      if ($env:APPVEYOR_REPO_TAG -eq "true") {
+          cd .\ImageSort.WindowsSetup\;
+          gitversion /updatewixversionfile;
+          MSBuild /p:Configuration=Release /p:Platform=x64 /p:OutputPath=..\artifacts\x64 /p:BuildProjectReferences=false;
+          MSBuild /p:Configuration=Release /p:Platform=x86 /p:OutputPath=..\artifacts\x86 /p:BuildProjectReferences=false;
+          cd ..;
+      }
+
 
 artifacts:
   - path: '.\artifacts\**\*.msi'