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Make nix flake metadata|update|lock lazy

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These don't need to evaluate anything (except for the flake metadata
in flake.nix) so we can make these commands operate on lazy trees
without risk of any semantic change in the evaluator.

However, `nix flake metadata` now no longer prints the store path,
which is a breaking change (but unavoidable if we want lazy trees).
This commit is contained in:
Eelco Dolstra 2025-02-06 22:39:01 +01:00
parent 3751c06fe1
commit f24ff056cb
4 changed files with 37 additions and 23 deletions
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tests/functional/flakes/flakes.sh
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@ -69,7 +69,6 @@ nix flake metadata "$flake1Dir" | grepQuiet 'URL:.*flake1.*'
# Test 'nix flake metadata --json'.
json=$(nix flake metadata flake1 --json | jq .)
[[ $(echo "$json" | jq -r .description) = 'Bla bla' ]]
[[ -d $(echo "$json" | jq -r .path) ]]
[[ $(echo "$json" | jq -r .lastModified) = $(git -C "$flake1Dir" log -n1 --format=%ct) ]]
hash1=$(echo "$json" | jq -r .revision)
[[ -n $(echo "$json" | jq -r .fingerprint) ]]