Attempt 6 to fix AppVeyor configuration

Error: The build phase is set to "MSBuild" mode (default), but no Visual Studio project or solution files were found in the root directory. If you are not building Visual Studio project switch build mode to "Script" and provide your custom build command.

Author: valentinitnelav

appveyor.yml

@@ -8,7 +8,6 @@
 #   - All section names are case-sensitive.
 #   - Section names should be unique on each level.
 
-
 # DO NOT CHANGE the "init" and "install" sections below
 
 # Download script file from GitHub
@@ -17,25 +16,22 @@ init:
         $ErrorActionPreference = "Stop"
         Invoke-WebRequest http://raw.github.com/krlmlr/r-appveyor/master/scripts/appveyor-tool.ps1 -OutFile "..\appveyor-tool.ps1"
         Import-Module '..\appveyor-tool.ps1'
-        Write-Host "Current Working Directory during init:" (Get-Location).Path
+  - cmd: echo Current Working Directory during init: %CD%
 
 install:
   ps: Bootstrap
 
 cache:
   - C:\RLibrary
 
-before_build:
-  - cmd: ECHO Current Working Directory: %CD%
-  - ps: Write-Host "Current Working Directory before build:" (Get-Location).Path
-  - cmd: if exist C:\projects\plotbiomes\plotbiomes.Rproj del C:\projects\plotbiomes\plotbiomes.Rproj
-
-# Adapt as necessary starting from here
-
-build_script:
-  - travis-tool.sh install_deps
+# Set the build mode to Script
+build:
+  script:
+    - echo Current Working Directory during build: %CD%
+    - travis-tool.sh install_deps
 
 test_script:
+  - echo Current Working Directory during test: %CD%
   - travis-tool.sh run_tests
 
 on_failure:
@@ -63,8 +59,3 @@ artifacts:
 
   - path: '\*_*.zip'
     name: Bits
-
-environment:
-  matrix:
-    exclude:
-      - C:\projects\plotbiomes\plotbiomes.Rproj