tools/content: Add a flag to control verbosity of KaTeX check result

Author: rajveermalviya

tools/content/check-features

@@ -106,6 +106,7 @@ run_check() {
 run_katex_check() {
     flutter test tools/content/unimplemented_katex_test.dart \
         --dart-define=corpusDir="$opt_corpus_dir" \
+        --dart-define=verbose="$opt_verbose" \
     || return 1
 }
 

tools/content/unimplemented_katex_test.dart

@@ -113,6 +113,11 @@ void main() async {
       buf.writeln('Because of $reason:');
       buf.writeln('  ${messageIds.length} messages failed.');
       buf.writeln('  Oldest message: $oldestId, Newest message: $newestId');
+      if (!_verbose) {
+        buf.writeln();
+        continue;
+      }
+
       buf.writeln('  Message IDs (up to 100): ${messageIds.take(100).join(', ')}');
       buf.writeln('  TeX source (up to 30):');
       for (final node in failedMathNodes.take(30)) {
@@ -153,6 +158,8 @@ void main() async {
 
 const String _corpusDirPath = String.fromEnvironment('corpusDir');
 
+const bool _verbose = int.fromEnvironment('verbose', defaultValue: 0) != 0;
+
 Iterable<File> _getCorpusFiles() {
   final corpusDir = Directory(_corpusDirPath);
   return corpusDir.existsSync() ? corpusDir.listSync().whereType<File>() : [];