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Emit API-only summaries
R=jmesserly@google.com Review URL: https://codereview.chromium.org/2435203002 .
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@ -217,7 +217,10 @@ class CodeGenerator extends GeneralizingAstVisitor
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true)
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.forEach(assembler.addLinkedLibrary);
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return assembler.assemble().toBuffer();
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var bundle = assembler.assemble();
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// Preserve only API-level information in the summary.
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bundle.flushInformative();
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return bundle.toBuffer();
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}
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JS.Program _emitModule(List<CompilationUnit> compilationUnits) {
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@ -81,6 +81,15 @@ $stackTrace
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}
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}
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bool _changed(List<int> list1, List<int> list2) {
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var length = list1.length;
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if (length != list2.length) return true;
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for (var i = 0; i < length; ++i) {
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if (list1[i] != list2[i]) return true;
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}
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return false;
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}
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void _compile(ArgResults argResults, void printFn(Object obj)) {
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var compiler =
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new ModuleCompiler(new AnalyzerOptions.fromArguments(argResults));
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@ -150,7 +159,13 @@ void _compile(ArgResults argResults, void printFn(Object obj)) {
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if (module.summaryBytes != null) {
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var summaryPath =
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path.withoutExtension(outPath) + '.${compilerOpts.summaryExtension}';
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new File(summaryPath).writeAsBytesSync(module.summaryBytes);
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// Only overwrite if summary changed. This plays better with timestamp
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// based build systems.
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var file = new File(summaryPath);
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if (!file.existsSync() ||
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_changed(file.readAsBytesSync(), module.summaryBytes)) {
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file.writeAsBytesSync(module.summaryBytes);
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}
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}
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}
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}
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