[augeas-devel] Remove a value from an array with augtool?

[Raphaël Pinson]

Hello,

On Sat, Nov 24, 2012 at 2:43 AM, Graham Leggett <minfrin at sharp.fm> wrote:

> Hi all,
>
> I am trying to edit a postfix main.cf with with augtool, and am
> struggling with arrays.
>
> I can add a particular value to a given array with the set command, for
> example like this:
>
> augtool> set /files/etc/postfix/main.cf/virtual_alias_maps[last()] my-map
>


This will set the last element, even if it already exists. If you want to
add an element to the array, you should use:

    set /files/etc/postfix/main.cf/virtual_alias_maps[last()+1] my-map

Note that this operation is not idempotent, it will add a new entry every
time you run it.



>
> I am struggling with the syntax to remove this value "my-map" again:
>
> augtool> rm [what-goes-here?]
>


If you want to remove all virtual_alias_maps values, simply use:

    rm /files/etc/postfix/main.cf/virtual_alias_maps

If you only want to remove the last value:

    rm /files/etc/postfix/main.cf/virtual_alias_maps[last()]


Cheers,


Raphaël
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