[Windows] use clcache when building on appveyor

appveyor.yml

@@ -1,13 +1,14 @@
 version: "{build}"
 
+cache:
+  - C:\Users\Appveyor\clcache
+
 environment:
   matrix:
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
       VSVER: Visual Studio 14 2015 Win64
-      PYTHON: "C:\\Python27"
-# disable multiple builds until each build takes more than 30 minutes
-#    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-#      VSVER: Visual Studio 15 2017 Win64
+      PYTHON: "3.6"
+  APPVEYOR_SAVE_CACHE_ON_ERROR: true
 
 platform:
   - x64
@@ -16,25 +17,22 @@ configuration:
   - Release
 
 install:
+  - set MINICONDA=C:\Miniconda36-x64
+  - set PATH=%MINICONDA%;%MINICONDA%/Scripts;%MINICONDA%/Library/bin;%PATH%
+  - call scripts\appveyor-setup.bat
   - git submodule -q update --init
 
-before_build:
-  - md %APPVEYOR_BUILD_FOLDER%\build
-  - cd %APPVEYOR_BUILD_FOLDER%\build
-  - cmake -G"%VSVER%" -DCMAKE_BUILD_TYPE=%CONFIGURATION% -DBUILD_META_EXAMPLES=OFF -DENABLE_TESTING=ON ..
-
 build:
   verbosity: minimal
 
 # TODO: fix cmake script in order that building examples
 # triggers the build of shogun-static.vcxproj
 build_script:
-  - msbuild src\shogun\libshogun.vcxproj
-  - msbuild src\shogun\shogun.vcxproj
-  - msbuild src\shogun\shogun-static.vcxproj
-  - msbuild shogun.sln
+  - call scripts\msvc-build.bat
 
 test_script:
   - cd %APPVEYOR_BUILD_FOLDER%\build
   - ctest --output-on-failure -C %CONFIGURATION%
 
+after_build:
+  - clcache -s

scripts/appveyor-setup.bat

@@ -0,0 +1,23 @@
+@echo on
+
+conda update -y -q conda
+conda config --set auto_update_conda false
+conda info -a
+
+conda config --set show_channel_urls True
+
+@rem Help with SSL timeouts to S3
+conda config --set remote_connect_timeout_secs 12
+
+conda config --add channels https://repo.continuum.io/pkgs/free
+conda config --add channels conda-forge
+conda info -a
+
+@rem Use clcache for faster builds
+pip install -q git+https://github.com/frerich/clcache.git
+clcache -s
+set CC=clcache
+set CXX=clcache
+set CLCACHE_SERVER=1
+set CLCACHE_HARDLINK=1
+powershell.exe -Command "Start-Process clcache-server"

scripts/msvc-build.bat

@@ -0,0 +1,16 @@
+@echo on
+
+conda create -n shogun -q -y python=%PYTHON% ^
+    setuptools numpy scipy eigen ^
+    cmake snappy zlib ctags ply jinja2
+call activate shogun
+
+mkdir %APPVEYOR_BUILD_FOLDER%\build
+pushd %APPVEYOR_BUILD_FOLDER%\build
+
+cmake -G "%VSVER%" ^
+      -DCMAKE_BUILD_TYPE=%CONFIGURATION% ^
+      -DCMAKE_INSTALL_PREFIX=%CONDA_PREFIX%\Library ^
+      -DENABLE_TESTING=ON .. || exit /B
+
+cmake --build . --target install --config %CONFIGURATION% || exit /B