CMake: Move Hunter config to its own file, cache Hunter on AppVeyor CI

CMakeLists.txt

@@ -21,13 +21,7 @@ include(HunterGate)
 include(GNUInstallDirs)
 include(defaults/HunterCacheServers)
 
-# Setup Hunter.
+include(HunterConfig)
-# Hunter is going to be initialized only if building with tests,
-# where it is needed to get dependencies.
-HunterGate(
-    URL "https://github.com/ruslo/hunter/archive/v0.20.37.tar.gz"
-    SHA1 "51886d10428c924cc21756abc17623bcf4986386"
-)
 
 project(evmc)
 set(PROJECT_VERSION "0.1.0.dev0")

appveyor.yml

@@ -16,6 +16,8 @@ environment:
 
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
       GENERATOR: "Visual Studio 14 2015 Win64"
+cache:
+  - C:\.hunter\_Base\Cache -> cmake\HunterConfig.cmake
 
 before_build: |
   if not exist build mkdir build

cmake/HunterConfig.cmake

@@ -0,0 +1,11 @@
+# EVMC: Ethereum Client-VM Connector API.
+# Copyright 2018 Pawel Bylica.
+# Licensed under the MIT License. See the LICENSE file.
+
+# Setup Hunter.
+# Hunter is going to be initialized only if building with tests,
+# where it is needed to get dependencies.
+HunterGate(
+    URL "https://github.com/ruslo/hunter/archive/v0.20.37.tar.gz"
+    SHA1 "51886d10428c924cc21756abc17623bcf4986386"
+)