From a7138e7681bc838d896651d33f98c562a0e2a882 Mon Sep 17 00:00:00 2001
From: Daniel Stonier <d.stonier@gmail.com>
Date: Sun, 9 Feb 2014 16:35:24 +0900
Subject: [PATCH] Update README.md
---
README.md | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/README.md b/README.md
index 904c3e8..6d182ae 100644
--- a/README.md
+++ b/README.md
@@ -2,3 +2,24 @@ genjava
=======
RosJava message definition and serialization artifact generators.
+
+For future reference, executing the generator from the command line requires a command of the following kind:
+
+```
+java -classpath .:./message_generation-0.1.16.jar org.ros.internal.message.GenerateInterfaces
+```
+
+This doesn't work exactly though because it doesn't pull in the full classpath. Make sure that is set to include everything you need. You'll also need arguments of the kind we're currently using in the hydro groovy plugin:
+
+```
+ def generatedSourcesDir = "${p.buildDir}/generated-src"
+ def generateSourcesTask = p.tasks.create("generateSources", JavaExec)
+ generateSourcesTask.description = "Generate sources for " + pkg.name
+ generateSourcesTask.outputs.dir(p.file(generatedSourcesDir))
+ /* generateSourcesTask.args = new ArrayList<String>([generatedSourcesDir, pkg.name]) */
+ generateSourcesTask.args = new ArrayList<String>([generatedSourcesDir, '--package-path=' + pkg.directory, pkg.name])
+ generateSourcesTask.classpath = p.configurations.runtime
+ generateSourcesTask.main = 'org.ros.internal.message.GenerateInterfaces'
+ p.tasks.compileJava.source generateSourcesTask.outputs.files
+```
+
--
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