Import LinuxCNC source tree

tests/trajectory-planner/circular-arcs/test-reverse.py

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+"""
+How to use this test script:
+
+    This is a quick and dirty way to illustrate reverse-run behavior with existing GUI's.
+    1) Launch linuxcnc, set up / run a program as usual
+    2) Pause the program
+    3) Open a new terminal and launch this script interactively:
+        python3 -i test-reverse.py
+    4) Press "resume" in GUI to see reverse run motion (can pause and resume as with normal motion)
+    5) manually type this command to run in forward direction:
+        c.auto(linuxcnc.AUTO_FORWARD)
+    6) Resume motion in GUI with resume button
+
+"""
+
+import linuxcnc
+
+c = linuxcnc.command()
+#NOTE probably should be done already paused
+c.auto(linuxcnc.AUTO_PAUSE)
+c.wait_complete(1)
+#TODO use constant
+c.auto(linuxcnc.AUTO_REVERSE)
+#Now play in GUI, pause / resume / etc
+# Once reversing is done, pause the motion and run this command, then resume
+#c.auto(linuxcnc.AUTO_FORWARD)