Analyzer directory recursing (tk 2) (#25129).

pkg/analyzer_cli/lib/src/error_formatter.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer_cli.src.error_formatter;
 
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer_cli/src/options.dart';
 
 /// Returns the given error's severity.
 ProcessedSeverity _identity(AnalysisError error) =>
     new ProcessedSeverity(error.errorCode.errorSeverity);
 
+String _pluralize(String word, int count) => count == 1 ? word : word + "s";
+
 /// Returns desired severity for the given [error] (or `null` if it's to be
 /// suppressed).
 typedef ProcessedSeverity _SeverityProcessor(AnalysisError error);
 
+/// Analysis statistics counter.
+class AnalysisStats {
+  int errorCount;
+  int hintCount;
+  int lintCount;
+  int warnCount;
+
+  AnalysisStats() {
+    init();
+  }
+
+  /// (Re)set initial values.
+  void init() {
+    errorCount = 0;
+    hintCount = 0;
+    lintCount = 0;
+    warnCount = 0;
+  }
+
+  /// Print statistics to [out].
+  void print(StringSink out) {
+    var hasErrors = errorCount != 0;
+    var hasWarns = warnCount != 0;
+    var hasHints = hintCount != 0;
+    var hasLints = lintCount != 0;
+    bool hasContent = false;
+    if (hasErrors) {
+      out.write(errorCount);
+      out.write(' ');
+      out.write(_pluralize("error", errorCount));
+      hasContent = true;
+    }
+    if (hasWarns) {
+      if (hasContent) {
+        if (!hasHints && !hasLints) {
+          out.write(' and ');
+        } else {
+          out.write(", ");
+        }
+      }
+      out.write(warnCount);
+      out.write(' ');
+      out.write(_pluralize("warning", warnCount));
+      hasContent = true;
+    }
+    if (hasHints) {
+      if (hasContent) {
+        if (!hasLints) {
+          out.write(' and ');
+        } else {
+          out.write(", ");
+        }
+      }
+      out.write(hintCount);
+      out.write(' ');
+      out.write(_pluralize("hint", hintCount));
+      hasContent = true;
+    }
+    if (hasLints) {
+      if (hasContent) {
+        out.write(" and ");
+      }
+      out.write(lintCount);
+      out.write(' ');
+      out.write(_pluralize("lint", lintCount));
+      hasContent = true;
+    }
+    if (hasContent) {
+      out.writeln(" found.");
+    } else {
+      out.writeln("No issues found");
+    }
+  }
+}
+
 /// Helper for formatting [AnalysisError]s.
 /// The two format options are a user consumable format and a machine consumable
 /// format.
 class ErrorFormatter {
   final StringSink out;
   final CommandLineOptions options;
+  final AnalysisStats stats;
   final _SeverityProcessor processSeverity;
 
-  ErrorFormatter(this.out, this.options, [this.processSeverity = _identity]);
+  ErrorFormatter(this.out, this.options, this.stats,
+      [this.processSeverity = _identity]);
 
   /// Compute the severity for this [error] or `null` if this error should be
   /// filtered.
   ErrorSeverity computeSeverity(AnalysisError error) =>
       processSeverity(error)?.severity;
 
   void formatError(
       Map<AnalysisError, LineInfo> errorToLine, AnalysisError error) {
     Source source = error.source;
     LineInfo_Location location = errorToLine[error].getLocation(error.offset);
@@ skipping 66 matching lines @@
       // Path.
       compare = Comparable.compare(error1.source.fullName.toLowerCase(),
           error2.source.fullName.toLowerCase());
       if (compare != 0) {
         return compare;
       }
       // Offset.
       return error1.offset - error2.offset;
     });
     // Format errors.
-    int errorCount = 0;
-    int warnCount = 0;
-    int hintCount = 0;
-    int lintCount = 0;
     for (AnalysisError error in errors) {
       ProcessedSeverity processedSeverity = processSeverity(error);
       ErrorSeverity severity = processedSeverity.severity;
       if (severity == ErrorSeverity.ERROR) {
-        errorCount++;
+        stats.errorCount++;
       } else if (severity == ErrorSeverity.WARNING) {
         /// Only treat a warning as an error if it's not been set by a
         /// proccesser.
         if (!processedSeverity.overridden && options.warningsAreFatal) {
-          errorCount++;
+          stats.errorCount++;
         } else {
-          warnCount++;
+          stats.warnCount++;
         }
       } else if (error.errorCode.type == ErrorType.HINT) {
-        hintCount++;
+        stats.hintCount++;
       } else if (error.errorCode.type == ErrorType.LINT) {
-        lintCount++;
+        stats.lintCount++;
       }
       formatError(errorToLine, error);
     }
-    // Print statistics.
-    if (!options.machineFormat) {
-      var hasErrors = errorCount != 0;
-      var hasWarns = warnCount != 0;
-      var hasHints = hintCount != 0;
-      var hasLints = lintCount != 0;
-      bool hasContent = false;
-      if (hasErrors) {
-        out.write(errorCount);
-        out.write(' ');
-        out.write(pluralize("error", errorCount));
-        hasContent = true;
-      }
-      if (hasWarns) {
-        if (hasContent) {
-          if (!hasHints && !hasLints) {
-            out.write(' and ');
-          } else {
-            out.write(", ");
-          }
-        }
-        out.write(warnCount);
-        out.write(' ');
-        out.write(pluralize("warning", warnCount));
-        hasContent = true;
-      }
-      if (hasHints) {
-        if (hasContent) {
-          if (!hasLints) {
-            out.write(' and ');
-          } else {
-            out.write(", ");
-          }
-        }
-        out.write(hintCount);
-        out.write(' ');
-        out.write(pluralize("hint", hintCount));
-        hasContent = true;
-      }
-      if (hasLints) {
-        if (hasContent) {
-          out.write(" and ");
-        }
-        out.write(lintCount);
-        out.write(' ');
-        out.write(pluralize("lint", lintCount));
-        hasContent = true;
-      }
-      if (hasContent) {
-        out.writeln(" found.");
-      } else {
-        out.writeln("No issues found");
-      }
-    }
   }
 
   static String escapePipe(String input) {
     var result = new StringBuffer();
     for (var c in input.codeUnits) {
       if (c == '\\' || c == '|') {
         result.write('\\');
       }
       result.writeCharCode(c);
     }
     return result.toString();
   }
-
-  static String pluralize(String word, int count) {
-    if (count == 1) {
-      return word;
-    } else {
-      return word + "s";
-    }
-  }
 }
 
-/// A severity with awareness of whether it was overriden by a processor.
+/// A severity with awareness of whether it was overridden by a processor.
 class ProcessedSeverity {
   ErrorSeverity severity;
   bool overridden;
   ProcessedSeverity(this.severity, [this.overridden = false]);
 }