make ps1 script more verbose

appveyor.yml

@@ -5,6 +5,7 @@ branches:
 build_script:
 - ps: >-
    & "$env:APPVEYOR_BUILD_FOLDER\ci\appveyor.ps1"
+   exit $lastexitcode
 
 cache:
 - work\git -> appveyor.yml
@@ -14,4 +15,4 @@ environment:
     #mingw
     - COMPILER: MINGW
     #msvc
-    - COMPILER: MSVC
+    #- COMPILER: MSVC

ci/appveyor.ps1

@@ -2,19 +2,17 @@
 #http://stackoverflow.com/questions/2124753/how-i-can-use-powershell-with-the-visual-studio-command-prompt
 function batCall([string] $path, [string] $arg)
 {
-Write-Host "Calling $path $arg"
-cmd /c "'$path' '$arg' & set" |
-foreach {
+    Write-Host "Calling '$path' '$arg'"
+    cmd /c "'$path' '$arg' & set" |
+    foreach {
       if ($_ -match "=") {
-    #Write-Host "ENV:\$($v[0])=$($v[1])"
+        Write-Host "ENV:\$($v[0])=$($v[1])"
         $v = $_.split("="); set-item -force -path "ENV:\$($v[0])"  -value "$($v[1])"
       }
-}
+    }
 }
 
-$CMAKE_INSTALL_ROOT=$env:APPVEYOR_BUILD_FOLDER -replace "\\", "/"
-$CMAKE_INSTALL_ROOT="$CMAKE_INSTALL_ROOT/work/install"
-
+$CMAKE_INSTALL_ROOT="$env:APPVEYOR_BUILD_FOLDER/work/install" -replace "\\", "/"
 
 if ( $env:COMPILER -eq "MINGW" )
 {