populate flake-input: support subdirectories named in URLs

Depending on the version of Nix, flake references and lock entries name
the subdirectory containing a flake either as attribute dir or as query
parameter dir of their URL.  fetchTree supports neither, so populate
looks for both: it takes the subdirectory from either, from the locked
or the original reference, and removes both before fetching.

0 files changed, 0 insertions, 0 deletions