[ci] refs #17 - Rollback to cygwin

appveyor.yml

@@ -1,10 +1,11 @@
 image: Visual Studio 2017
 
-stack: go 1.10
-
 environment:
     global:
-        GOPATH: c:\gopath
+        CYG_ROOT: C:\cygwin64
+        CYG_MIRROR: http://cygwin.mirror.constant.com
+        CYG_CACHE: C:\cygwin64\var\cache\setup
+        CYG_BASH: C:\cygwin64\bin\bash
 
     matrix:
         - PYTHON: "C:\\Python27"
@@ -18,22 +19,23 @@ environment:
           DISTUTILS_USE_SDK: "1"
         - PYTHON: "C:\\Python35-x64"
         - PYTHON: "C:\\Python36-x64"
-        - PROFILE: MINGWx64
-          PLATFORM: x64
+cache:
+    - '%CYG_CACHE%'
 
 install:
-    - "%PYTHON%\\python.exe -m ensurepip"
-    - "%PYTHON%\\python.exe -m pip install cpp-coveralls==0.3.11"
+    - '%CYG_ROOT%\setup-x86_64.exe --quiet-mode --no-shortcuts --upgrade-also --packages autoconf,autogen,automake,cygwin-devel,git,gcc-core,gcc-g++,libncurses-devel,libprotobuf-devel,make,openssh,openssl-devel,pkg-config,zlib-devel'
+    - '%CYG_ROOT%\bin\cygcheck -dc cygwin'
     - git submodule init
     - git submodule update
     - cd gopath/src/github.com/skycoin/skycoin
     - git checkout origin/stdevEclipse_t1568_swig_files
     - cd C:\projects\pyskycoin
-    - "%PYTHON%\\python.exe -m pip install setuptools wheel tox"
-    - cinst make
+    - "%PYTHON%\\python.exe -m pip install wheel tox"
+    - choco install make --source=cygwin
     - cinst swig
 
 build: off
 
 test_script:
-    - cmake --build build\mingw --use-stderr --target test
+    - '%CYG_BASH% -lc "export OS=Windows_NT"'
+    - '%CYG_BASH% -lc "cd $APPVEYOR_BUILD_FOLDER && make test"'