return a key at different level that matches a value

[electriquo]

foo:
  bar:
    stat: spam-$ANCHOR
  baz:
    stat: beef-$ANCHOR
  qaz:
    stat: ham

I am interested in a selector which will return all keys in the n'th (0<=n<=2) level for which stat contains $ANCHOR in its value. E.g. in the snippet above, what is the selector to return bar and baz?

I can relax the question by switching contains in matches and providing exact value for the selector matcher. I.e. return all keys in the n'th level for which stat contains equals spam-$ANCHOR in its value. E.g. in the snippet above, what is the selector to return bar?

I could only came up with a selector that returns me the key which has the match but not any level above it. For example:

echo '
foo:
  bar:
    stat: anchor1
  baz:
    stat: anchor2
  qaz:
    stat: ham
' | dasel -p yaml -m '.(?:stat=anchor1).-'
stat

Which returned stat where I would like to get bar

[TomWright]

This can't be done at the moment. I've considered a ^ parent selector before to traverse back up the tree but haven't looked in to how it might be achieved.

Theoretically it can be done but it would be a fairly large job because of the way each node is currently built.

[electriquo]

Thank you for dasel and all the help!

[TomWright]

Hey @foolioo,

With dasel v2 (still in development but at a good point) you can achieve this with:

$ echo '
foo:
  bar:
    stat: anchor1
  baz:
    stat: anchor2
  qaz:
    stat: ham
' | dasel -r yaml 'foo.all().filter(or(equal(stat,anchor1),equal(stat,anchor2))).key()'
bar
baz

Does this satisfy your needs? I'm looking for a few good examples for the documentation and README info for updating to v2.

If you would be interested in running the development version of v2 let me know. I'm keen to ensure all prior functionality is still possible.

The documentation can be found here: https://daseldocs.tomwright.me/v/v2/