[O] eval header arguments for ledger :cmdline?

[Myles English]

Hello,

Can anybody tell me how this could be achieved, please?

I would like to use parameters for ledger[1] source code blocks, and
understand that the :cmdline header argument means "pass this straight
through to the command line", but effectively what I would like to do is
this:

#+PROPERTY: header-args :var ACC_PERIOD="-b 2013-04-06 -e 2014-04-06" 
BAT_FILE="myledger.bat"

#+begin_src ledger :cmdline bal ACC_PERIOD -f BAT_FILE

#+end_src

Is something like this currently possible or does it need further
development of ob-ledger.el?  Any volunteers||collaborators?

Myles



[1] http://www.ledger-cli.org/