[augeas-devel] Please confirm: Augeas cannot use number labels in node tests

[Mol, Xavier (SCC)]

Thank you Raphael,

 

nifty trick, that I should keep in mind.

 

Ciao,

Xavier.

 

From: Raphaël Pinson [mailto:raphael.pinson at camptocamp.com] 
Sent: Monday, January 11, 2016 11:54 AM
To: Mol, Xavier (SCC)
Cc: augeas-devel at redhat.com
Subject: Re: [augeas-devel] Please confirm: Augeas cannot use number labels in node tests

 

Hi Xavier,

 

 

Augeas XPath doesn't like digits are label values because it recognizes them as ints. The trick is to use `./` in front:

 

     match /*[./1 = "second"]

 

will work

 

 

Raphaël

 

On Mon, Jan 11, 2016 at 11:42 AM, Mol, Xavier (SCC) <xavier.mol at kit.edu> wrote:

Hello Augeas experts,

can someone please confirm to me, that Augeas is unable to relate to numbered nodes in nodes tests with their label?

augtool> set /a/1 "first"
augtool> set /b/1 "second"
augtool> match /*[1 = "second"]
error: Invalid path expression
error: type error
/*[1 = "second"]|=|

There are alternative expressions one can use to pick the right node - e.g.

augtool> match /*[*[1] = "second"]
/b = (none)
augtool> match /*[*[label() = "1"][. = "second"]]
/b = (none)

But still I'm wondering whether this is intentional.

Ciao,
Xavier.

PS: This one obviously fails, because the string "1" will never equal "second"...

augtool> match /*["1" = "second"]
  (no matches)



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