Initial version

* plugins loader
* graph IO in json
* uid computation
* commandLine expression evaluation
* subprocess execution
* generate statistics
* export command logs to file
* save/load status file
* only compute nodes not previously computed

tests/test_task.py

@@ -0,0 +1,23 @@
+import processGraph as pg
+from nose.tools import *
+
+
+def test_depth():
+    graph = pg.Graph('Tests tasks depth')
+
+    tA = graph.addNewNode('Ls', input='/tmp')
+    tB = graph.addNewNode('AppendText', inputText='echo B')
+    tC = graph.addNewNode('AppendText', inputText='echo C')
+
+    graph.addEdges(
+        (tA.output, tB.input),
+        (tB.output, tC.input)
+        )
+
+    assert_equal(tA.getDepth(), 1)
+    assert_equal(tB.getDepth(), 2)
+    assert_equal(tC.getDepth(), 3)
+
+
+if __name__ == '__main__':
+    test_depth()