[augeas-devel] Malformed child node when putting w/ ShellVars_list

[Doug Warner]

On 06/01/2011 05:11 PM, Francis Giraldeau wrote:
>> I'm using Augeas 0.7.4 and wrote a little stub lens to use
>> ShellVars_list on
>> /etc/conf.d/modules in Gentoo.
>>
>> I'm trying to put a value to the modules_2_6 variable; this is the
>> output of a
>> test session (there is currently no modules_2_6 set):
>>
>> # augtool
>> augtool> set /files/etc/conf.d/modules/modules_2_6[last()+1] junk0
>> augtool> save
>> Saving failed
>> augtool> ls /augeas/files/etc/conf.d/modules/error/
>> path = /files/etc/conf.d/modules
>> lens = /usr/share/augeas/lenses/dist/shellvars_list.aug:40.12-.37:
>> message = Malformed child node 'modules_2_6'
> 
> Here is a small lens that shows the parsing of the text with
> shellvars_list.aug: 
> 
> module Gentoo =
> 
> test Shellvars_list.lns get "modules_2_6=\"junk0\"\n" = ?
> test Shellvars_list.lns get "modules_2_6=junk0\n" = ?
> 
> It produces this: 
> 
> Test result: gentoo.aug:3.0-.57:
>   { "modules_2_6"
>     { "quote" = """ }
>     { "value" = "junk0" }
>   }
> 
> Test result: gentoo.aug:4.0-.53:
>   { "modules_2_6"
>     { "quote" = "" }
>     { "value" = "junk0" }
>   }
> 
> Hense, three nodes must be set. The first one, "modules_2_6" doesn't
> have a value. Children nodes "quote" and "value" must exists, and quote
> node must be before any value nodes (the order matters). 
> 
> Here is an example to create this string from scratch:
> 
> test Shellvars_list.lns put "" after 
> 	clear "/modules_2_6";
> 	set "/modules_2_6/quote" "\"";
> 	set "/modules_2_6/value" "junk0" = "modules_2_6=\"junk0\"\n"
> 
> For multiple values: 
> 
> test Shellvars_list.lns put "" after 
> 	clear "/modules_2_6";
> 	set "/modules_2_6/quote" "\""; 
> 	set "/modules_2_6/value" "junk0";
> 	set "/modules_2_6/value[last()+1]" "junk1" = "modules_2_6=\"junk0 junk1
> \""
> 
> Cheer, 
> 
> Francis

Francis,

Thanks for the explanation on how to better use this lens.  I had done some
playing around with it yesterday w.r.t. working with Gentoo's new
/etc/conf.d/net format and saw the quote & value trees but didn't put them
together.   I was able to replicate your example and will work on getting them
into my puppet stuff next; thanks!

-Doug

# augtool
augtool> ls /files/etc/conf.d/modules/modules_2_6
augtool> clear /files/etc/conf.d/modules/modules_2_6
augtool> set /files/etc/conf.d/modules/modules_2_6/quote '"'
augtool> set /files/etc/conf.d/modules/modules_2_6/value[last()+1] junk0
augtool> ls /files/etc/conf.d/modules/modules_2_6
quote = "
value = junk0
augtool> save
Saved 1 file(s)
augtool>

# tail -n1 /etc/conf.d/modules
modules_2_6="junk0"

# augtool
augtool> set /files/etc/conf.d/modules/modules_2_6/value[last()+1] junk1
augtool> save
Saved 1 file(s)
augtool>

# tail -n1 /etc/conf.d/modules
modules_2_6="junk0 junk1"

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