Clean better.

admin/build.ps1

@@ -16,15 +16,11 @@ Function ensureVersion() {
 }
 
 Function clearIvyCache() {
-  if (test-path C:\Users\appveyor\.ivy2\cache\org.scala-lang) {
-    remove-item -force -recurse C:\Users\appveyor\.ivy2\cache\org.scala-lang
-  }
-  if (test-path C:\Users\appveyor\.ivy2) {
-    get-childitem -path C:\Users\appveyor\.ivy2 -recurse -include "*compiler-interface*$env:version*" | remove-item -force -recurse
-  }
-  if (test-path C:\Users\appveyor\.sbt) {
-    get-childitem -path C:\Users\appveyor\.sbt -recurse -include "*compiler-interface*$env:version*" | remove-item -force -recurse
-  }
+  remove-item -erroraction ignore -force $homeDir\.ivy2\exclude_classifiers, $homeDir\.ivy2\exclude_classifiers.lock
+  remove-item -erroraction ignore -force -recurse $homeDir\.ivy2\cache\org.scala-lang
+  remove-item -erroraction ignore -force -recurse $homeDir\.ivy2\local\org.scala-lang
+  get-childitem -erroraction ignore -path $homeDir\.ivy2 -recurse -include "*compiler-interface*$env:version*" | remove-item -force -recurse
+  get-childitem -erroraction ignore -path $homeDir\.sbt -recurse -include "*compiler-interface*$env:version*" | remove-item -force -recurse
 }
 
 # oh boy. i don't (want to) fully understand, but executing commands and redirecting is difficult.

admin/build.sh

@@ -71,7 +71,9 @@ function triggerSmoketest() {
 }
 
 clearIvyCache() {
+  rm -f $HOME/.ivy2/exclude_classifiers $HOME/.ivy2/exclude_classifiers.lock
   rm -rf $HOME/.ivy2/cache/org.scala-lang
+  rm -rf $HOME/.ivy2/local/org.scala-lang
   if [ -d $HOME/.ivy2 ]; then find $HOME/.ivy2 -name "*compiler-interface*$version*" | xargs rm -rf; fi
   if [ -d $HOME/.sbt ]; then find $HOME/.sbt -name "*compiler-interface*$version*" | xargs rm -rf; fi
 }

scripts/common.ps1

@@ -1,3 +1,5 @@
+$homeDir="C:\Users\appveyor"
+
 Function postCommitStatus($state) {
   if ("$env:scala_sha" -ne "") {
     $jsonTemplate = '{{ "state": "{0}", "target_url": "{1}", "description": "{2}", "context": "{3}" }}'