Relative path flakes ("subflakes") are basically fundamentally
broken, since they produce lock file entries like
"locked": {
"lastModified": 1,
"narHash": "sha256-/2tW9SKjQbRLzfcJs5SHijli6l3+iPr1235zylGynK8=",
"path": "./flakeC",
"type": "path"
},
that don't specify what "./flakeC" is relative to. They *sometimes*
worked by accident because the `narHash` field allowed
`fetchToStore()` to get the store path of the subflake *if* it
happened to exist in the local store or in a substituter.
Subflakes are properly fixed in #10089 (which adds a "parent" field to
the lock file). Rather than come up with some crazy hack to make them
work in the interim, let's just disable the only test that depends on
the broken behaviour for now.
Fixes
$ nix flake metadata --store /tmp/nix nixpkgs
error: path '/tmp/nix/nix/store/65xpqkz92d9j7k5ric4z8lzhiigxsfbg-source/flake.nix' is not in the Nix store
This has been broken since 598deb2b23.
Subflakes are flakes in the same tree, accessed in flake inputs via
relative paths (e.g. `inputs.foo.url = "path:./subdir"`). Previously
these didn't work very well because they would be separately copied to
the store, which is inefficient and makes references to parent
directories tricky or impossible. Furthermore, they had their own NAR
hash in the lock file, which is superfluous since the parent is
already locked.
Now subflakes are accessed via the accessor of the calling flake. This
avoids the unnecessary copy and makes it possible for subflakes to
depend on flakes in a parent directory (so long as they're in the same
tree).
Lock file nodes for relative flake inputs now have a new `parent` field:
{
"locked": {
"path": "./subdir",
"type": "path"
},
"original": {
"path": "./subdir",
"type": "path"
},
"parent": [
"foo",
"bar"
]
}
which denotes that `./subdir` is to be interpreted relative to the
directory of the `bar` input of the `foo` input of the root flake.
Extracted from the lazy-trees branch.
In streaming mode, libarchive doesn't handle symlinks in zip files
correctly. So write the entire file to disk so libarchive can access
it in random-access mode.
Fixes#10649. This was broken in cabee98152.
