Introduce a new selector key `dir=<path>` to the -l/--selector flag with two
effects: it filters releases by the directory of their defining helmfile
relative to the root helmfile (using directory-prefix matching, so
dir=apps/foo matches both apps/foo and apps/foo/sub), and it short-circuits
sub-helmfile traversal when paired with positive dir= constraints, so
non-matching branches in the helmfiles: tree are not parsed, templated, or
fetched.
The motivation is consuming aggregator-style upstreams that the operator
does not control (opendesk being the immediate example), where the user
cannot restructure the helmfile layout but still wants to act on a subset.
The dir label is auto-populated at filter time only; user-facing label
output is unchanged. The label key "dir" is reserved at state load.
Selectors that escape the root via .. or absolute paths, and the bare ".",
are rejected at parse time.
Signed-off-by: Dominik Schmidt <dev@dominik-schmidt.de>
ad45f0a1b9