Version 2.16.0-80.0.dev
Merge commit '3bfb2db3d0b7dfc492be19cd026c9e900653ef79' into 'dev'
diff --git a/pkg/compiler/lib/compiler_new.dart b/pkg/compiler/lib/compiler_new.dart
index 4b1d89f..5a4ccc8 100644
--- a/pkg/compiler/lib/compiler_new.dart
+++ b/pkg/compiler/lib/compiler_new.dart
@@ -82,6 +82,9 @@
/// Deferred map output.
deferredMap,
+ /// Unused libraries output.
+ dumpUnusedLibraries,
+
/// Implementation specific output used for debugging the compiler.
debug,
}
diff --git a/pkg/compiler/lib/src/commandline_options.dart b/pkg/compiler/lib/src/commandline_options.dart
index 8737b26..18fa4cb 100644
--- a/pkg/compiler/lib/src/commandline_options.dart
+++ b/pkg/compiler/lib/src/commandline_options.dart
@@ -175,6 +175,9 @@
// For backward compatibility the option is still accepted, but it is ignored.
static const String initializingFormalAccess = '--initializing-formal-access';
+ // Whether or not to dump a list of unused libraries.
+ static const String dumpUnusedLibraries = '--dump-unused-libraries';
+
// Experimental flags.
static const String resolveOnly = '--resolve-only';
diff --git a/pkg/compiler/lib/src/compiler.dart b/pkg/compiler/lib/src/compiler.dart
index 49838e5..146e093 100644
--- a/pkg/compiler/lib/src/compiler.dart
+++ b/pkg/compiler/lib/src/compiler.dart
@@ -5,6 +5,7 @@
library dart2js.compiler_base;
import 'dart:async' show Future;
+import 'dart:convert' show jsonEncode;
import 'package:front_end/src/api_unstable/dart2js.dart'
show clearStringTokenCanonicalizer;
@@ -246,6 +247,31 @@
return options.readClosedWorldUri != null && options.readDataUri != null;
}
+ /// Dumps a list of unused [ir.Library]'s in the [KernelResult]. This *must*
+ /// be called before [setMainAndTrimComponent], because that method will
+ /// discard the unused [ir.Library]s.
+ void dumpUnusedLibraries(KernelResult result) {
+ var usedUris = result.libraries.toSet();
+ bool isUnused(ir.Library l) => !usedUris.contains(l.importUri);
+ String libraryString(ir.Library library) {
+ return '${library.importUri}(${library.fileUri})';
+ }
+
+ var unusedLibraries =
+ result.component.libraries.where(isUnused).map(libraryString).toList();
+ unusedLibraries.sort();
+ var jsonLibraries = jsonEncode(unusedLibraries);
+ outputProvider.createOutputSink(options.outputUri.pathSegments.last,
+ 'unused.json', api.OutputType.dumpUnusedLibraries)
+ ..add(jsonLibraries)
+ ..close();
+ reporter.reportInfo(
+ reporter.createMessage(NO_LOCATION_SPANNABLE, MessageKind.GENERIC, {
+ 'text': "${unusedLibraries.length} unused libraries out of "
+ "${result.component.libraries.length}. Dumping to JSON."
+ }));
+ }
+
Future runInternal() async {
clearState();
var compilationTarget = options.compilationTarget;
@@ -324,6 +350,9 @@
// deserialized modular data because some of this data may reference
// 'trimmed' elements.
if (options.fromDill) {
+ if (options.dumpUnusedLibraries) {
+ dumpUnusedLibraries(result);
+ }
if (options.entryUri != null) {
result.setMainAndTrimComponent(options.entryUri);
}
diff --git a/pkg/compiler/lib/src/dart2js.dart b/pkg/compiler/lib/src/dart2js.dart
index 7df673c..8a49df4 100644
--- a/pkg/compiler/lib/src/dart2js.dart
+++ b/pkg/compiler/lib/src/dart2js.dart
@@ -627,6 +627,7 @@
OptionHandler(Flags.benchmarkingExperiment, passThrough),
OptionHandler(Flags.soundNullSafety, setNullSafetyMode),
OptionHandler(Flags.noSoundNullSafety, setNullSafetyMode),
+ OptionHandler(Flags.dumpUnusedLibraries, passThrough),
// TODO(floitsch): remove conditional directives flag.
// We don't provide the info-message yet, since we haven't publicly
diff --git a/pkg/compiler/lib/src/options.dart b/pkg/compiler/lib/src/options.dart
index 79d15b9..d78db4c 100644
--- a/pkg/compiler/lib/src/options.dart
+++ b/pkg/compiler/lib/src/options.dart
@@ -564,6 +564,9 @@
/// Verbosity level used for filtering messages during compilation.
fe.Verbosity verbosity = fe.Verbosity.all;
+ // Whether or not to dump a list of unused libraries.
+ bool dumpUnusedLibraries = false;
+
late FeatureOptions features;
// -------------------------------------------------
@@ -690,6 +693,7 @@
.._noSoundNullSafety = _hasOption(options, Flags.noSoundNullSafety)
.._mergeFragmentsThreshold =
_extractIntOption(options, '${Flags.mergeFragmentsThreshold}=')
+ ..dumpUnusedLibraries = _hasOption(options, Flags.dumpUnusedLibraries)
..cfeInvocationModes = fe.InvocationMode.parseArguments(
_extractStringOption(options, '${Flags.cfeInvocationModes}=', '')!,
onError: onError)
diff --git a/pkg/compiler/lib/src/source_file_provider.dart b/pkg/compiler/lib/src/source_file_provider.dart
index cc5e875..359fead 100644
--- a/pkg/compiler/lib/src/source_file_provider.dart
+++ b/pkg/compiler/lib/src/source_file_provider.dart
@@ -351,6 +351,7 @@
uri = out.resolve('$name.$extension');
break;
case OutputType.dumpInfo:
+ case OutputType.dumpUnusedLibraries:
case OutputType.deferredMap:
if (name == '') {
name = out.pathSegments.last;
diff --git a/tools/VERSION b/tools/VERSION
index e431a95..7ba8c56 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -27,5 +27,5 @@
MAJOR 2
MINOR 16
PATCH 0
-PRERELEASE 79
+PRERELEASE 80
PRERELEASE_PATCH 0
\ No newline at end of file
