Protocol Buffer runtime library and 'protoc' plugin

lib/protobuf/plugin/ProtocGenDart.dart

+#!/usr/bin/env dart
+// Copyright (c) 2011, 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.
+
+#import("../runtime/Protobuf.dart");
+#import("dart:io");
+#source("protoc/descriptor.pb.dart");
+#source("protoc/plugin.pb.dart");
+#source("CodeGenerator.dart");
+#source("DartFile.dart");
+#source("DartHelpers.dart");
+#source("EnumGenerator.dart");
+#source("ExtensionGenerator.dart");
+#source("IndentingWriter.dart");
+#source("MessageGenerator.dart");
+#source("ProtobufField.dart");
+#source("ProtocException.dart");
+#source("ProtoGenDartConfig.dart");
+#source("Writer.dart");
+
+final String DISABLE_STREAMS_FLAG = "disable_streams";
+
+void main() {
+  var config = parseOptions();
+  if (config === null || !config.valid) {
+    usage();
+  } else {
+    CodeGenerator cg = new CodeGenerator(config, stdin, stdout, stderr);
+    cg.generate();
+  }
+}
+
+void err(String s) {
+  stderr.write("$s\n".charCodes());
+}
+
+void usage() {
+  err("Usage: protoc-gen-dart [--out=OUTDIR] [--parameter=PARAM] "
+      "PROTO_FILES < DESCRIPTORS");
+  err("--out=OUTDIR      output directory (as passed to the --foo_out");
+  err("                  parameterif omitted, the current directory should");
+  err("                  be used.");
+  err("--parameter=PARAM gives the generator param, if any was provided.");
+  err("                  Some generators accept extra parameters. You can");
+  err("                  specify this parameter on the command-line by");
+  err("                  placing it before the output directory, separated");
+  err("                  by a colon (protoc --dart_out=disable_streams:out).");
+  err("  PROTO_FILES     The PROTO_FILES list the .proto files which");
+  err("                  were given on the compiler command-line; these");
+  err("                  are the files for which the plugin is expected");
+  err("                  to generate output code.");
+  err("  DESCRIPTORS     Finally, DESCRIPTORS is an encoded");
+  err("                  FileDescriptorSet as defined in descriptor.proto");
+  err("                  This is piped to the plugin's stdin.");
+}
+
+final String OUT_CL_PARAM = "--out";
+final String PARAMETER_CL_PARAM = "--parameter";
+
+ProtocGenDartConfig parseOptions([ProtocGenDartConfig config = null]) {
+  Options opts = new Options();
+  ProtocGenDartConfig _config = config !== null ? config
+      : new ProtocGenDartConfig();
+  try {
+    for (int i = 0; i < opts.arguments.length; i++) {
+      if (opts.arguments[i].startsWith(OUT_CL_PARAM)) {
+        if(opts.arguments[i].length > OUT_CL_PARAM.length + 1) {
+          _config.out = opts.arguments[i].substring(OUT_CL_PARAM.length + 1);
+        }
+      } else if (opts.arguments[i].startsWith(PARAMETER_CL_PARAM)) {
+        if(opts.arguments[i].length > PARAMETER_CL_PARAM.length + 1) {
+          _config.parameter =
+              opts.arguments[i].substring(PARAMETER_CL_PARAM.length + 1);
+        }
+        continue;
+      } else {
+        if (opts.arguments[i].startsWith("-")) {
+          _config.valid = false;
+        } else {
+          _config.protoFiles.add(opts.arguments[i]);
+        }
+      }
+    }
+    return _config;
+  } catch (FileIOException e) {
+    err(e.message);
+  }
+}
+