Initial CL to create SDK directory (this will be done as a build step).

frog/frog_options.dart

Index: frog/frog_options.dart
===================================================================
--- frog/frog_options.dart	(revision 1719)
+++ frog/frog_options.dart	(working copy)
@@ -22,6 +22,9 @@
   /** Where to place the generated code. */
   String outfile;
 
+  /* TODO(dgrove): fix this. For now, either 'sdk' or 'dev'. */

[Siggi Cherem (dart-lang), 2011/11/21 23:44:23]

nit: use // comments for TODOs rather than /* (so they don't get pulled into
dartdocs)

[dgrove, 2011/11/22 00:41:24]

Done.

+  final config = 'dev';
+
   // Options that modify behavior significantly
   bool enableLeg = false;
   bool legOnly = false;
@@ -46,7 +49,15 @@
   List<String> childArgs;
 
   FrogOptions(String homedir, List<String> args, FileSystem files) {
-    libDir = homedir + '/lib'; // Default value for --libdir.
+    if (config == 'dev') {
+      libDir = homedir + '/lib'; // Default value for --libdir.
+    } else if (config == 'sdk') {
+      libDir = homedir + '/../lib/corelib/frog';

[Siggi Cherem (dart-lang), 2011/11/21 23:44:23]

it might be good to call [joinPaths] and [dirname] here and above (definitions
in file_system.dart)

[dgrove, 2011/11/22 00:41:24]

Done.

+    } else {
+      world.error('Invalid reader configuration $config', null);
+      throw('Invalid reader config');
+    }
+
     bool ignoreUnrecognizedFlags = false;
     bool passedLibDir = false;
     childArgs = [];
@@ -133,7 +144,7 @@
     }
 
     // TODO(jimhug): Remove this hack.
-    if (!passedLibDir && !files.fileExists(libDir)) {
+    if (!passedLibDir && !files.fileExists(libDir + "/corelib.dart")) {

[Siggi Cherem (dart-lang), 2011/11/21 23:44:23]

why is this change needed? 

[dgrove, 2011/11/22 00:41:24]

A good question - because files.fileExists doesn't work for a directory. If you
run this line here:

    print("file exists: ${files.fileExists(libDir + '/corelib.dart')}
${files.fileExists(libDir)}");

you'll get "file exists: true false" as the output (at least when running on the
VM). 

       // Try locally
       var temp = 'frog/lib';
       if (files.fileExists(temp)) {