Merge pull request #168 from ukstv/master

Remove only build/contracts

lib/app.js

@@ -114,13 +114,13 @@ class App {
       // Compile the contracts before instrumentation and preserve their ABI's.
       // We will be stripping out access modifiers like view before we recompile
       // post-instrumentation.
-      if (shell.test('-e', `${this.coverageDir}/build`)){
+      if (shell.test('-e', `${this.coverageDir}/build/contracts`)){
-        shell.rm('-Rf', `${this.coverageDir}/build`)
+        shell.rm('-Rf', `${this.coverageDir}/build/contracts`)
       }
 
       this.runCompileCommand();
       this.originalArtifacts = this.loadArtifacts();
-      shell.rm('-Rf', `${this.coverageDir}/build`);
+      shell.rm('-Rf', `${this.coverageDir}/build/contracts`);
 
     } catch (err) {
       const msg = ('There was a problem generating the coverage environment: ');