Create wrapper script around mojom's generate.dart in the Sky package.

This CL does the following:
- Moves mojom's generate.dart from bin/ to lib/ to make it available for use
  by a wrapper scripts in the Sky package, thus avoiding all consumers of Sky
  needing to directly depend on mojom to be able to call
  "pub run mojom:generate".
- Adds a sky->mojom pub dependency and creates a wrapper script around mojom's
  generate.dart in the Sky package.
- Augments the Sky README to explain the usage of this script.

R=eseidel@chromium.org, sethladd@google.com

Review URL: https://codereview.chromium.org/1136503002

.gitignore

diff --git a/.gitignore b/.gitignore
index 6b133e2..98668a3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,7 @@
 .gdbinit
 .landmines
 .project
+.pub
 .pydevproject
 .checkstyle
 cscope.*
@@ -67,7 +68,13 @@
 /third_party/yasm/source/patched-yasm/
 /tools/grit/
 /v8/
-# dart packages directories
+# dart packages directories and related.
 /mojo/dart/mojom/packages
 /mojo/dart/mojom/bin/packages
 /mojo/dart/apptest/packages
+/sky/examples/hello_world/packages
+/sky/examples/stocks/packages
+/sky/sdk/packages/mojo/packages
+/sky/sdk/packages/mojo/pubspec.lock
+/sky/sdk/packages/sky/packages
+/sky/sdk/packages/sky/pubspec.lock

mojo/dart/mojom/README.md

diff --git a/mojo/dart/mojom/README.md b/mojo/dart/mojom/README.md
index 8932851..d7889aa 100644
--- a/mojo/dart/mojom/README.md
+++ b/mojo/dart/mojom/README.md
@@ -7,11 +7,11 @@
 package by saying the following after `pub get`:
 
 ```
-$ pub run mojom:generate
+$ dart -p packages packages/mojom/generate.dart
 ```
 If desired, additional directories holding .mojom.dart files can be specified;
 their contents will be installed to this package as well:
 
 ```
-$ pub run mojom:generate -a </path/to/mojom/dir>
+$ dart -p packages packages/mojom/generate.dart -a </path/to/mojom/dir>
 ```

mojo/dart/mojom/lib/README.md

diff --git a/mojo/dart/mojom/lib/README.md b/mojo/dart/mojom/lib/README.md
index f608b86..fc326c1 100644
--- a/mojo/dart/mojom/lib/README.md
+++ b/mojo/dart/mojom/lib/README.md
@@ -1,8 +1,5 @@
 mojom
 ====
 
-Files will appear here after running the generate script (see the top-level
-documentation for this package).
-
-This file is a placeholder to ensure that the mojom package gets installed
-under "packages/" when it is added as a dependency.
+mojom.dart files will appear here after running the generate script (see the
+top-level documentation for this package).

mojo/dart/mojom/lib/generate.dart

diff --git a/mojo/dart/mojom/bin/generate.dart b/mojo/dart/mojom/lib/generate.dart
similarity index 100%
rename from mojo/dart/mojom/bin/generate.dart
rename to mojo/dart/mojom/lib/generate.dart

mojo/dart/mojom/pubspec.yaml

diff --git a/mojo/dart/mojom/pubspec.yaml b/mojo/dart/mojom/pubspec.yaml
index 36bcd5f..3a38709 100644
--- a/mojo/dart/mojom/pubspec.yaml
+++ b/mojo/dart/mojom/pubspec.yaml
@@ -1,5 +1,5 @@
 name: mojom
-version: 0.0.3
+version: 0.0.4
 author: Chromium Authors <mojo-dev@googlegroups.com>
 description: Placeholder for mojom bindings.
 homepage: https://github.com/domokit/mojo

sky/sdk/README.md

diff --git a/sky/sdk/README.md b/sky/sdk/README.md
index eca9cf0..987807a 100644
--- a/sky/sdk/README.md
+++ b/sky/sdk/README.md
@@ -50,8 +50,10 @@
 ```
 
 Once the pubspec is in place, create a `lib` directory (where your dart code
-will go) and run `pub get` to download all necessary dependencies and create
-the symlinks necessary for 'package:your_app_names/main.dart' includes to work.
+will go), ensure that the 'dart' and 'pub' executables are on your $PATH and
+run the following:
+
+`pub get && pub run sky:init`.
 
 Currently the Sky Engine assumes the entry point for your application is a
 `main` function located inside a `main.sky` file at the root of the package.

sky/sdk/packages/sky/bin/init.dart

diff --git a/sky/sdk/packages/sky/bin/init.dart b/sky/sdk/packages/sky/bin/init.dart
new file mode 100644
index 0000000..7616fec
--- /dev/null
+++ b/sky/sdk/packages/sky/bin/init.dart
@@ -0,0 +1,17 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/*
+* This script should be invoked via 'pub run' after 'pub get':
+* $ pub run sky:init
+* NOTE: The 'dart' executable must be on your $PATH for this script to work.
+*/
+
+import 'dart:io';
+
+main(List<String> arguments) {
+  ProcessResult result = Process.runSync('dart', ['-p', 'packages', 'packages/mojom/generate.dart']);
+  stdout.write(result.stdout);
+  stderr.write(result.stderr);
+}

sky/sdk/packages/sky/pubspec.yaml

diff --git a/sky/sdk/packages/sky/pubspec.yaml b/sky/sdk/packages/sky/pubspec.yaml
index 12f7faf..23e101f 100644
--- a/sky/sdk/packages/sky/pubspec.yaml
+++ b/sky/sdk/packages/sky/pubspec.yaml
@@ -5,3 +5,4 @@
 version: 0.0.5
 dependencies:
   mojo: '>=0.0.1 <1.0.0'
+  mojom: '>=0.0.4 <1.0.0'