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mirror of https://github.com/NixOS/nix synced 2025-07-07 14:21:48 +02:00
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Mount flake input source accessors on top of storeFS

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This way, we don't need the PathDisplaySourceAccessor source accessor
hack, since error messages are produced directly by the original
source accessor.

In fact, we don't even need to copy the inputs to the store at all, so
this gets us very close to lazy trees. We just need to know the store
path so that requires hashing the entire input, which isn't lazy. But
the next step will be to use a virtual store path that gets rewritten
to the actual store path only when needed.
This commit is contained in:
Eelco Dolstra 2025-04-01 17:29:15 +02:00
parent fcddf4afe3
commit 73b1754816
14 changed files with 66 additions and 117 deletions
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12
tests/functional/flakes/source-paths.sh
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@ -13,6 +13,7 @@ cat > "$repo/flake.nix" <<EOF
outputs = { ... }: {
x = 1;
y = assert false; 1;
z = builtins.readFile ./foo;
};
}
EOF
@ -28,3 +29,14 @@ expectStderr 1 nix eval "$repo#y" | grepQuiet "at $repo/flake.nix:"
git -C "$repo" commit -a -m foo
expectStderr 1 nix eval "git+file://$repo?ref=master#y" | grepQuiet "at «git+file://$repo?ref=master&rev=.*»/flake.nix:"
expectStderr 1 nix eval "$repo#z" | grepQuiet "error: path '/foo' does not exist in Git repository \"$repo\""
expectStderr 1 nix eval "git+file://$repo?ref=master#z" | grepQuiet "error: '«git+file://$repo?ref=master&rev=.*»/foo' does not exist"
echo foo > "$repo/foo"
expectStderr 1 nix eval "$repo#z" | grepQuiet "error: File 'foo' in the repository \"$repo\" is not tracked by Git."
git -C "$repo" add "$repo/foo"
[[ $(nix eval --raw "$repo#z") = foo ]]