Issue 14685. Don't analyzer parts.

editor/tools/plugins/com.google.dart.command.analyze/src/com/google/dart/command/analyze/AnalyzerImpl.java

Index: editor/tools/plugins/com.google.dart.command.analyze/src/com/google/dart/command/analyze/AnalyzerImpl.java
diff --git a/editor/tools/plugins/com.google.dart.command.analyze/src/com/google/dart/command/analyze/AnalyzerImpl.java b/editor/tools/plugins/com.google.dart.command.analyze/src/com/google/dart/command/analyze/AnalyzerImpl.java
index 620937bf42a536bca534679f4420d3b79798f1a8..340d9ea9fa3102a7e89bdbc75e9109e23c8a7dde 100644
--- a/editor/tools/plugins/com.google.dart.command.analyze/src/com/google/dart/command/analyze/AnalyzerImpl.java
+++ b/editor/tools/plugins/com.google.dart.command.analyze/src/com/google/dart/command/analyze/AnalyzerImpl.java
@@ -14,6 +14,10 @@
 package com.google.dart.command.analyze;
 
 import com.google.dart.engine.AnalysisEngine;
+import com.google.dart.engine.ast.CompilationUnit;
+import com.google.dart.engine.ast.Directive;
+import com.google.dart.engine.ast.LibraryDirective;
+import com.google.dart.engine.ast.PartOfDirective;
 import com.google.dart.engine.context.AnalysisContext;
 import com.google.dart.engine.context.AnalysisException;
 import com.google.dart.engine.element.CompilationUnitElement;
@@ -134,10 +138,24 @@ class AnalyzerImpl {
     context.setSourceFactory(sourceFactory);
     context.setAnalysisOptions(contextOptions);
 
-    // analyze the given file
+    // prepare Source
     sourceFile = sourceFile.getAbsoluteFile();
     UriKind uriKind = getUriKind(sourceFile);
     Source librarySource = new FileBasedSource(sourceFactory.getContentCache(), sourceFile, uriKind);
+
+    // don't try to analyzer parts
+    CompilationUnit unit = context.parseCompilationUnit(librarySource);
+    boolean hasLibraryDirective = false;
+    boolean hasPartOfDirective = false;
+    for (Directive directive : unit.getDirectives()) {
+      hasLibraryDirective |= directive instanceof LibraryDirective;
+      hasPartOfDirective |= directive instanceof PartOfDirective;
+    }
+    if (hasPartOfDirective && !hasLibraryDirective) {
+      return ErrorSeverity.NONE;

[Brian Wilkerson, 2013/11/01 23:02:20]

If I understand correctly, this will silently ignore part files. I think we need
to issue a message to the user so that they understand how to fix the problem.
Otherwise they might interpret the silence to mean that there are no problems in
the file.

+    }
+
+    // analyze Source
     LibraryElement library = context.computeLibraryElement(librarySource);
     context.resolveCompilationUnit(librarySource, library);