Add a Pub source that checks packages out from Git.

utils/pub/io.dart

Index: utils/pub/io.dart
diff --git a/utils/pub/io.dart b/utils/pub/io.dart
index e6c79ca853701c5e85fef70008b5c24ef73d3ff2..00defd188efdb4805d8c670dce7351d33a23d82a 100644
--- a/utils/pub/io.dart
+++ b/utils/pub/io.dart
@@ -320,9 +320,13 @@ String getFullPath(entry) => new File(_getPath(entry)).fullPathSync();
  * Spawns and runs the process located at [executable], passing in [args].
  * Returns a [Future] that will complete the results of the process after it
  * has ended.
+ *
+ * If [pipeStdout] and/or [pipeStderr] are set, all output from the subprocess's
+ * output stream(s) to the parent process's output stream(s). Output from piped

[Bob Nystrom, 2012/05/08 17:01:49]

"to the" -> "are sent to the".
Also "(s)" -> "s".

[nweiz, 2012/05/09 00:21:04]

Done.

+ * streams won't be available in the result object.
  */
 Future<ProcessResult> runProcess(String executable, List<String> args,
-    [String workingDir]) {
+    [String workingDir, bool pipeStdout = false, bool pipeStderr = false]) {
   int exitCode;
 
   final options = new ProcessOptions();
@@ -348,13 +352,21 @@ Future<ProcessResult> runProcess(String executable, List<String> args,
         processStdout, processStderr, exitCode));
   }
 
-  outStream.onLine   = () => processStdout.add(outStream.readLine());
-  outStream.onClosed = checkComplete;
-  outStream.onError  = (error) => completer.completeException(error);
+  if (pipeStdout) {
+    process.stdout.pipe(stdout, close: false);
+  } else {
+    outStream.onLine   = () => processStdout.add(outStream.readLine());
+    outStream.onClosed = checkComplete;
+    outStream.onError  = (error) => completer.completeException(error);
+  }
 
-  errStream.onLine   = () => processStderr.add(errStream.readLine());
-  errStream.onClosed = checkComplete;
-  errStream.onError  = (error) => completer.completeException(error);
+  if (pipeStderr) {
+    process.stderr.pipe(stderr, close: false);
+  } else {
+    errStream.onLine   = () => processStderr.add(errStream.readLine());
+    errStream.onClosed = checkComplete;
+    errStream.onError  = (error) => completer.completeException(error);
+  }
 
   process.onExit = (actualExitCode) {
     exitCode = actualExitCode;
@@ -375,6 +387,8 @@ class ProcessResult {
   final int exitCode;
 
   const ProcessResult(this.stdout, this.stderr, this.exitCode);
+
+  bool get success() => exitCode == 0;
 }
 
 /**