- Implement .packages specification.

runtime/bin/main.cc

 // Copyright (c) 2012, 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.
 
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 
 #include "include/dart_api.h"
 #include "include/dart_tools_api.h"
@@ skipping 42 matching lines @@
 static const char* debug_ip = NULL;
 static int debug_port = -1;
 static const char* DEFAULT_DEBUG_IP = "127.0.0.1";
 static const int DEFAULT_DEBUG_PORT = 5858;
 
 // Value of the --package-root flag.
 // (This pointer points into an argv buffer and does not need to be
 // free'd.)
 static const char* commandline_package_root = NULL;
 
+// Value of the --packages flag.
+// (This pointer points into an argv buffer and does not need to be
+// free'd.)
+static const char* commandline_packages_file = NULL;
+
 
 // Global flag that is used to indicate that we want to compile all the
 // dart functions and not run anything.
 static bool has_compile_all = false;
 
 // Global flag that is used to indicate that we want to trace resolution of
 // URIs and the loading of libraries, parts and scripts.
 static bool has_trace_loading = false;
 
 
@@ skipping 89 matching lines @@
                                      CommandLineOptions* vm_options) {
   ASSERT(arg != NULL);
   if (*arg == '\0' || *arg == '-') {
     return false;
   }
   commandline_package_root = arg;
   return true;
 }
 
 
+static bool ProcessPackagesOption(const char* arg,
+                                     CommandLineOptions* vm_options) {
+  ASSERT(arg != NULL);
+  if (*arg == '\0' || *arg == '-') {
+    return false;
+  }
+  commandline_packages_file = arg;
+  return true;
+}
+
+
 static void* GetHashmapKeyFromString(char* key) {
   return reinterpret_cast<void*>(key);
 }
 
 
 static bool ExtractPortAndIP(const char *option_value,
                              int *out_port,
                              const char **out_ip,
                              int default_port,
                              const char *default_ip) {
@@ skipping 182 matching lines @@
   const char* option_name;
   bool (*process)(const char* option, CommandLineOptions* vm_options);
 } main_options[] = {
   // Standard options shared with dart2js.
   { "--version", ProcessVersionOption },
   { "--help", ProcessHelpOption },
   { "-h", ProcessHelpOption },
   { "--verbose", ProcessVerboseOption },
   { "-v", ProcessVerboseOption },
   { "--package-root=", ProcessPackageRootOption },
+  { "--packages=", ProcessPackagesOption },
   { "-D", ProcessEnvironmentOption },
   // VM specific options to the standalone dart program.
   { "--break-at=", ProcessBreakpointOption },
   { "--compile_all", ProcessCompileAllOption },
   { "--debug", ProcessDebugOption },
   { "--snapshot=", ProcessGenScriptSnapshotOption },
   { "--enable-vm-service", ProcessEnableVmServiceOption },
   { "--observe", ProcessObserveOption },
   { "--trace-debug-protocol", ProcessTraceDebugProtocolOption },
   { "--trace-loading", ProcessTraceLoadingOption},
@@ skipping 98 matching lines @@
   } else {
     return -1;
   }
 
   // Parse out options to be passed to dart main.
   while (i < argc) {
     dart_options->AddArgument(argv[i]);
     i++;
   }
 
+  // Verify consistency of arguments.
+  if ((commandline_package_root != NULL) &&
+      (commandline_packages_file != NULL)) {
+    Log::PrintErr("Specifying both a packages directory and a packages "
+                  "file is invalid.");
+    return -1;
+  }
+
   return 0;
 }
 
 
 static Dart_Handle CreateRuntimeOptions(CommandLineOptions* options) {
   int options_count = options->count();
   Dart_Handle dart_arguments = Dart_NewList(options_count);
   if (Dart_IsError(dart_arguments)) {
     return dart_arguments;
   }
@@ skipping 52 matching lines @@
     Dart_ExitScope();                                                          \
     Dart_ShutdownIsolate();                                                    \
     return NULL;                                                               \
   }                                                                            \
 
 
 // Returns true on success, false on failure.
 static Dart_Isolate CreateIsolateAndSetupHelper(const char* script_uri,
                                                 const char* main,
                                                 const char* package_root,
+                                                const char* packages_file,
                                                 Dart_IsolateFlags* flags,
                                                 char** error,
                                                 int* exit_code) {
   ASSERT(script_uri != NULL);
-  IsolateData* isolate_data = new IsolateData(script_uri, package_root);
+  IsolateData* isolate_data = new IsolateData(script_uri,
+                                              package_root,
+                                              packages_file);
   Dart_Isolate isolate = NULL;
 
   isolate = Dart_CreateIsolate(script_uri,
                                main,
                                isolate_snapshot_buffer,
                                flags,
                                isolate_data,
                                error);
 
   if (isolate == NULL) {
@@ skipping 32 matching lines @@
   // Prepare builtin and its dependent libraries for use to resolve URIs.
   // The builtin library is part of the core snapshot and would already be
   // available here in the case of script snapshot loading.
   Dart_Handle builtin_lib =
       Builtin::LoadAndCheckLibrary(Builtin::kBuiltinLibrary);
   CHECK_RESULT(builtin_lib);
 
   // Prepare for script loading by setting up the 'print' and 'timer'
   // closures and setting up 'package root' for URI resolution.
   result = DartUtils::PrepareForScriptLoading(package_root,
+                                              packages_file,
                                               false,
                                               has_trace_loading,
                                               builtin_lib);
   CHECK_RESULT(result);
 
   result = Dart_SetEnvironmentCallback(EnvironmentCallback);
   CHECK_RESULT(result);
 
   // Load the script.
   result = DartUtils::LoadScript(script_uri, builtin_lib);
@@ skipping 37 matching lines @@
     if (data == NULL) {
       *error = strdup("Invalid 'callback_data' - Unable to spawn new isolate");
       return NULL;
     }
     script_uri = parent_isolate_data->script_url;
     if (script_uri == NULL) {
       *error = strdup("Invalid 'callback_data' - Unable to spawn new isolate");
       return NULL;
     }
   }
+  const char* packages_file = NULL;
   if (package_root == NULL) {
     if (parent_isolate_data != NULL) {
       package_root = parent_isolate_data->package_root;
-    } else {
-      package_root = ".";
+      packages_file = parent_isolate_data->packages_file;
     }
   }
   return CreateIsolateAndSetupHelper(script_uri,
                                      main,
                                      package_root,
+                                     packages_file,
                                      flags,
                                      error,
                                      &exit_code);
 }
 
 
 static void PrintVersion() {
   Log::PrintErr("Dart VM version: %s\n", Dart_VersionString());
 }
 
 
 static void PrintUsage() {
   Log::PrintErr(
       "Usage: dart [<vm-flags>] <dart-script-file> [<dart-options>]\n"
       "\n"
       "Executes the Dart script passed as <dart-script-file>.\n"
       "\n");
   if (!has_verbose_option) {
     Log::PrintErr(
 "Common options:\n"
 "--checked or -c\n"
 "  Insert runtime type checks and enable assertions (checked mode).\n"
 "--help or -h\n"
 "  Display this message (add -v or --verbose for information about\n"
 "  all VM options).\n"
 "--package-root=<path> or -p<path>\n"
 "  Where to find packages, that is, \"package:...\" imports.\n"
+"--packages=<path>\n"
+"  Where to find a package spec file.\n"
 "--version\n"
 "  Print the VM version.\n");
   } else {
     Log::PrintErr(
 "Supported options:\n"
 "--checked or -c\n"
 "  Insert runtime type checks and enable assertions (checked mode).\n"
 "--help or -h\n"
 "  Display this message (add -v or --verbose for information about\n"
 "  all VM options).\n"
@@ skipping 257 matching lines @@
                                  &ServiceStreamCancelCallback);
 
   // Call CreateIsolateAndSetup which creates an isolate and loads up
   // the specified application script.
   char* error = NULL;
   int exit_code = 0;
   char* isolate_name = BuildIsolateName(script_name, "main");
   Dart_Isolate isolate = CreateIsolateAndSetupHelper(script_name,
                                                      "main",
                                                      commandline_package_root,
+                                                     commandline_packages_file,
                                                      NULL,
                                                      &error,
                                                      &exit_code);
   if (isolate == NULL) {
     Log::PrintErr("%s\n", error);
     free(error);
     delete [] isolate_name;
     exit((exit_code != 0) ? exit_code : kErrorExitCode);
   }
   delete [] isolate_name;
@@ skipping 115 matching lines @@
   exit(Process::GlobalExitCode());
 }
 
 }  // namespace bin
 }  // namespace dart
 
 int main(int argc, char** argv) {
   dart::bin::main(argc, argv);
   UNREACHABLE();
 }