Megatest

Itemmap Handling
~~~~~~~~~~~~~~~~

For cases were the dependent test has a similar but not identical
itempath to the downstream test an itemmap can allow for itemmatch
mode

.example for removing part of itemmap for waiton test (eg: item +foo-x/bar+ depends on waiton's item +y/bar+)
-------------------
[requirements]
mode itemwait
# itemmap <item pattern for this test>  <item replacement pattern for waiton test>
itemmap .*x/ y/

-------------------

.example for removing part of itemmap for waiton test (eg: item +foo/bar/baz+ in this test depends on waiton's item +baz+)
-------------------

# ## pattern replacement notes
#
# ## Example
# ## Remove everything up to the last /
[requirements]
mode itemwait
# itemmap <item pattern for this test> <nothing here indicates removal>
itemmap .*/
-------------------

.example replacing part of itemmap for (eg: item +foo/1234+ will imply waiton's item +bar/1234+)
-------------------

#
# ## Example
# ## Replace foo/ with bar/
[requirements]
mode itemwait
# itemmap <item pattern for this test>  <item replacement pattern for waiton test>
itemmap foo/ bar/

-------------------

.example for backreference (eg: item +foo23/thud+ will imply waiton's item +num-23/bar/thud+
-------------------
#
# ## Example
# ## can use \{number} in replacement pattern to backreference a (capture) from matching pattern similar to sed or perl
[requirements]
mode itemwait
# itemmap <item pattern for this test>  <item replacement pattern for waiton test>
itemmap foo(\d+)/ num-\1/bar/

-------------------

.example multiple itemmaps
-------------------

# multi-line; matches are applied in the listed order
# The following would map:
#   a123b321 to b321fooa123 then to 321fooa123p
#
[requirements]
itemmap (a\d+)(b\d+) \2foo\1
  b(.*) \1p
-------------------


Complex mapping
^^^^^^^^^^^^^^^
Complex mappings can be handled with a separate [itemmap] section (instead if an itemmap line in the [requirements] section)

Each line in an itemmap section starts with a waiton test name followed by an itemmap expression

.eg: The following causes waiton test A item +bar/1234+ to run when our test's +foo/1234+ item is requested as well as causing waiton test B's +blah+ item to run when our test's +stuff/blah+ item is requested
--------------
[itemmap]
A foo/ bar/
B stuff/
--------------


Complex mapping example
^^^^^^^^^^^^^^^^^^^^^^^



// image::itemmap.png[]
image::complex-itemmap.png[]








We accomplish this by configuring the testconfigs of our tests C D and E as follows:

.Testconfig for Test C
----------------------
[requirements]
waiton A B

[itemmap]

.Testconfig for Test E
----------------------
[requirements]
waiton C
itemmap (\d+)/res \1/bb
----------------------

Example from image just above, we want the following to occur:

. We want the above to execute when we request pattern +D/1/res+, eg from command line +megatest -run -testpatt D/1/res -target ... -runname ...+
. "(\d+)/res" -> "\1/aa" to require +C/1/aa+ be executed before +D/1/res+
. Full list to be run is now: D/1/res, C/1/aa
. "(\d+)/aa" -> "aa/\1" to create item +A/aa/1+
. Full list to be run is now: +D/1/res+, +C/1/aa+, +A/aa/1+


Dynamic Flow Dependency Tree
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

.Autogeneration waiton list for dynamic flow dependency trees
-------------------
[requirements]