allow transform to match absolute key path from left to right

[vkhatri]

Hi! This is relevant to #3

By default, transform matches oldkey anywhere in the consul kv.

It would be great to have another option or similar (e.g. -tranform-mode=absolute|regex) to perform an absolute left to right match on the kv.

e.g.

kv:
x/y/z/foo/x/y -> ignore
foo/x/y -> match

command:
-transform foo/x/y,foo/x/z -transform-mode=absolute

kv:
x/y/z/foo/x/y -> match
foo/x/y -> match

command:
-transform foo/x/y,foo/x/z -transform-mode=regex

[aaronhurt]

As I said in #3 the current path transformations are just string based and are not actually regex or path aware. I'll leave this open though and mark it as a possible future feature enhancement.

[aaronhurt]

Closing this issue. There isn't really a need for different transformation modes. If you want to perform a more restricted/absolute path transformation you should just be more explicit in what you pass to the transform option. The documentation has been updated to make this more explicit.