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Add docs for csvfile lookup

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Lorin Hochstein 2015-01-23 21:01:58 -05:00
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docsite/rst/playbooks_lookups.rst
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@ -90,6 +90,54 @@ Starting in version 1.4, password accepts a "chars" parameter to allow defining
To enter comma use two commas ',,' somewhere - preferably at the end. Quotes and double quotes are not supported.
.. _csvfile_lookup:
The CSV File Lookup
```````````````````
.. versionadded:: 1.5
The ``csvfile`` lookup reads the contents of a file in CSV (comma-separated value)
format. The lookup looks for the row where the first column matches ``keyname``, and
returns the value in the first column, unless a different column is specified.
The example below shows the contents of a CSV file named elements.csv with information about the
periodic table of elements::
Symbol,Atomic Number,Atomic Mass
H,1,1.008
He,2,4.0026
Li,3,6.94
Be,4,9.012
B,5,10.81
We can use the ``csvfile`` plugin to look up the atomic number or atomic of Lithium by its symbol::
- debug: msg="The atomic number of Lithium is {{ lookup('csvfile', 'Li file=elements.csv delimiter=,') }}"
- debug: msg="The atomic mass of Lithium is {{ lookup('csvfile', 'Li file=elements.csv delimiter=, col=2') }}"
The ``csvfile`` lookup supports several arguments. The format for passing
arguments is::
lookup('csvfile', 'key arg1=val1 arg2=val2 ...')
The first value in the argument is the ``key``, which must be an entry that
appears exactly once in column 0 (the first column, 0-indexed) of the table. All other arguments are optional.
========== ============ =========================================================================================
Field Default Description
---------- ------------ -----------------------------------------------------------------------------------------
file ansible.csv Name of the file to load
delimiter TAB Delimiter used by CSV file. As a special case, tab can be specified as either TAB or \t.
col 1 The column to output, indexed by 0
default empty string return value if the key is not in the csv file
========== ============ =========================================================================================
.. note:: The default delimiter is TAB, *not* comma.
.. _more_lookups:
More Lookups