How to use env/strenv as part of a key

[hobti01]

Given data1.yaml

.foo: dot
foo: nodot

this is as expected:

$ var=foo yq eval '.[env(var)]' data1.yaml 
nodot

but is there a better alternative to:

$ var=foo; var=".$var" yq eval '.[env(var)]' data1.yaml 
dot

because it's not:

$ var=foo yq eval '.["."+env(var)]' data1.yaml 
Error: Scalars not yet supported for addition

Thanks for any hints!

[mikefarah]

Not sure if this helps, but you can put the "." in the original var

var=".foo" yq eval '.[env(var)]' data1.yaml 

[mikefarah]

Also the next release (after 4.3.1) will have string concatenation :)