Move dart2js from sdk/lib/_internal/compiler to pkg/compiler

sdk/lib/_internal/compiler/implementation/util/command_line.dart

-// Copyright (c) 2014, 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 dart2js.util.command_line;
-
-/// The accepted escapes in the input of the --batch processor.
-///
-/// Contrary to Dart strings it does not contain hex escapes (\u or \x).
-Map<String, String> ESCAPE_MAPPING =
-    const {
-      "n": "\n",
-      "r": "\r",
-      "t": "\t",
-      "b": "\b",
-      "f": "\f",
-      "v": "\v",
-      "\\": "\\",
-    };
-
-/// Splits the line similar to how a shell would split arguments. If [windows]
-/// is `true` escapes will be handled like on the Windows command-line.
-///
-/// Example:
-///
-///     splitline("""--args "ab"c 'with " \'spaces'""").forEach(print);
-///     // --args
-///     // abc
-///     // with " 'spaces
-List<String> splitLine(String line, {bool windows: false}) {
-  List<String> result = <String>[];
-  bool inQuotes = false;
-  String openingQuote;
-  StringBuffer buffer = new StringBuffer();
-  for (int i = 0; i < line.length; i++) {
-    String c = line[i];
-    if (inQuotes && c == openingQuote) {
-      inQuotes = false;
-      continue;
-    }
-    if (!inQuotes && (c == '"' || (c == "'" && !windows))) {
-      inQuotes = true;
-      openingQuote = c;
-      continue;
-    }
-    if (c == '\\') {
-      if (i == line.length - 1) {
-        throw new FormatException("Unfinished escape: $line");
-      }
-      if (windows) {
-        String next = line[i+1];
-        if (next == '"' || next == r'\') {
-          buffer.write(next);
-          i++;
-          continue;
-        }
-      } else {
-        i++;
-
-        c = line[i];
-        String mapped = ESCAPE_MAPPING[c];
-        if (mapped == null) mapped = c;
-        buffer.write(mapped);
-        continue;
-      }
-    }
-    if (!inQuotes && c == " ") {
-      if (buffer.isNotEmpty) result.add(buffer.toString());
-      buffer.clear();
-      continue;
-    }
-    buffer.write(c);
-  }
-  if (inQuotes) throw new FormatException("Unclosed quotes: $line");
-  if (buffer.isNotEmpty) result.add(buffer.toString());
-  return result;
-}
-