On Tue, 2009-06-09 at 11:57 -0400, Bryan Kearney wrote:
> Ok.. lets try this (lutter knows this voodoo better)
It's not voodoo, it's XPath ;)
> "match *[alias ='usb-storage'] size = 0 "
That almost works, though shouldn't that second '=' be '==' ? (and maybe
we should make the augeas provider use '=' there, too, for consistency)
I would write this as
augeas { "usb-storage":
context => "/files/etc/modprobe.conf",
changes => [ "set alias[last()+1] usb-storage",
"set alias[last()]/modulename off",
],
onlyif => "match alias[.='usb-storage'] size == 0'
}
The fact that the modprobe.conf format is 'command args' with differing
meanings of the args for the various commands doesn't matter too much -
it just leads to different tree structures for those commands. For
example for the command 'alias NAME MODULE' the tree structure is
alias = 'NAME'
modulename = 'MODULE'
IOW, the name of the alias becomes the value of the 'alias' node, and
the name of the module is put as the value of a node labelled
'modulename'.
David
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