Use windows stack.yaml on appveyor to embedded the templates

appveyor.yml

@@ -1,20 +1,30 @@
-cache:
-- "c:\\sr" # stack root, short paths == fewer problems
-
-build: off
-
-before_test:
-- curl -ostack.zip -L --insecure http://www.stackage.org/stack/windows-i386
-- 7z x stack.zip stack.exe
-- git submodule update --init   # to fetch the templates
-
 clone_folder: "c:\\stack"
 environment:
   global:
     STACK_ROOT: "c:\\sr"
+    STACK_YAML: "c:\\stack\\windows\\stack-appveyor.yaml"
+
+
+cache:
+  - "c:\\sr" # stack root, short paths == fewer problems
+  - '%LOCALAPPDATA%\Programs\stack' # even less to install...
+    
+build: off
+
+install:
+  - curl -ostack.zip -L --insecure http://www.stackage.org/stack/windows-i386
+  - 7z x stack.zip stack.exe
+  - stack setup > nul
+
+before_test:
+  # the stack install already fails without the templates...
+  - git submodule update --init
+  # set PATH to where the hsb2hs binary is copied to
+  - cmd: set "PATH=%PATH%;%APPDATA%\\local\\bin"
+  - stack install hsb2hs
+
 
 test_script:
-- stack setup > nul
   # The ugly echo "" hack is to avoid complaints about 0 being an invalid file
   # descriptor
   - echo "" | stack --no-terminal test

windows/stack-appveyor.yaml

@@ -0,0 +1,20 @@
+flags:
+  pandoc:
+    trypandoc: false
+    https: true
+    embed_data_files: true
+    old-locale: false
+    network-uri: true
+packages:
+- '..'
+extra-deps:
+- 'hsb2hs-0.3.1'
+- 'texmath-0.8.6.2'
+- 'data-default-0.6.0'
+- 'data-default-instances-base-0.1.0'
+- 'preprocessor-tools-1.0.1'
+# to compile against aeson 0.11.0.0:
+# - 'aeson-0.11.0.0'
+# - 'fail-4.9.0.0'
+# - 'pandoc-types-1.16.1'
+resolver: lts-5.8