Add pathops and capture stderr so we can get SkDebugf output.

experimental/webtry/webtry.go

Index: experimental/webtry/webtry.go
diff --git a/experimental/webtry/webtry.go b/experimental/webtry/webtry.go
index 8e02a751a32f6786f00cb669a837e02d01f9602a..4b859d14fa1a626e1de2e5380d9e130fe937ff80 100644
--- a/experimental/webtry/webtry.go
+++ b/experimental/webtry/webtry.go
@@ -258,8 +258,7 @@ type response struct {
 }
 
 // doCmd executes the given command line string in either the out/Debug
-// directory or the inout directory. Returns the stdout, and stderr in the case
-// of a non-zero exit code.
+// directory or the inout directory. Returns the stdout and stderr.
 func doCmd(commandLine string, moveToDebug bool) (string, error) {
 	log.Printf("Command: %q\n", commandLine)
 	programAndArgs := strings.SplitN(commandLine, " ", 2)
@@ -290,11 +289,11 @@ func doCmd(commandLine string, moveToDebug bool) (string, error) {
 	cmd.Start()
 	err = cmd.Wait()
 	message := stdOut.String()
-	log.Printf("StdOut: %s\n", message)
+	message += stdErr.String()

[mtklein, 2014/04/28 13:27:36]

Perhaps we should use the same buffer for stdout and stderr so the messages are
interlaced?

[jcgregorio, 2014/04/28 13:39:36]

Done.

+	log.Printf("StdOut + StdErr: %s\n", message)
 	if err != nil {
 		log.Printf("Exit status: %s\n", err.Error())
 		log.Printf("StdErr: %s\n", stdErr.String())
-		message += stdErr.String()
 		return message, fmt.Errorf("Failed to run command.")
 	}
 	return message, nil