Addition of the new flag "file-read-mode" into the analysis server to fix the offset bug with Intel…

pkg/analysis_server/lib/src/server/driver.dart

Index: pkg/analysis_server/lib/src/server/driver.dart
diff --git a/pkg/analysis_server/lib/src/server/driver.dart b/pkg/analysis_server/lib/src/server/driver.dart
index 502b5d6d040f677f376050dc8bdb670d3788b238..dbe06739c301e9675a4c1cb15282e1274eb3d02c 100644
--- a/pkg/analysis_server/lib/src/server/driver.dart
+++ b/pkg/analysis_server/lib/src/server/driver.dart
@@ -115,11 +115,16 @@ class Driver implements ServerStarter {
   static const String SDK_OPTION = "sdk";
 
   /**
-   * The name of the option used to disable error notifications.
+   * The name of the flag used to disable error notifications.
    */
   static const String NO_ERROR_NOTIFICATION = "no-error-notification";
 
   /**
+   * The name of the option used to set the file read mode.
+   */
+  static const String FILE_READ_MODE = "file-read-mode";
+
+  /**
    * The instrumentation server that is to be used by the analysis server.
    */
   InstrumentationServer instrumentationServer;
@@ -194,6 +199,7 @@ class Driver implements ServerStarter {
     analysisServerOptions.enableIncrementalResolutionValidation =
         results[INCREMENTAL_RESOLUTION_VALIDATION];
     analysisServerOptions.noErrorNotification = results[NO_ERROR_NOTIFICATION];
+    analysisServerOptions.fileReadMode = results[FILE_READ_MODE];
 
     _initIncrementalLogger(results[INCREMENTAL_RESOLUTION_LOG]);
 
@@ -312,10 +318,20 @@ class Driver implements ServerStarter {
     parser.addOption(SDK_OPTION, help: "[path] the path to the sdk");
     parser.addFlag(
         NO_ERROR_NOTIFICATION,
-        help:
-            "disable sending all analysis error notifications to the server",
+        help: "disable sending all analysis error notifications to the server",
         defaultsTo: false,
         negatable: false);
+    parser.addOption(
+        FILE_READ_MODE,
+        help: "an option of the ways files can be read from disk, " +
+            "some clients normalize end of line characters which would make " +
+            "the file offset and range information incorrect.",
+        allowed: ["as-is", "normalize-eol"],
+        allowedHelp: {
+      "as-is": "file contents are read as-is, no file changes occur",
+      "normalize-eol":
+          "file contents normalize the end of line characters to the single character new line `\n`"
+    }, defaultsTo: "as-is");
 
     return parser;
   }