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tests/functional/flakes: Add test case for subflake locking

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This adds a test case where the lockfile of a relative path flake
dependency is updated.

It was reported by a user here: https://discourse.nixos.org/t/updating-local-subflakes-inputs-when-building-root-flake/61682

I think this test case relates to issue #7730.

Because the issue is not resolved, this test case would fail without
the `|| true` clause.
This commit is contained in:
Rodney Lorrimar 2025-03-20 13:28:05 +08:00
parent c97f779dbb
commit 1bc82d1c86
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2 changed files with 74 additions and 0 deletions
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1
tests/functional/flakes/meson.build
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@ -28,6 +28,7 @@ suites += {
'commit-lock-file-summary.sh',
'non-flake-inputs.sh',
'relative-paths.sh',
'relative-paths-lockfile.sh',
'symlink-paths.sh',
'debugger.sh'
],

73
tests/functional/flakes/relative-paths-lockfile.sh Normal file
View file

@ -0,0 +1,73 @@
#!/usr/bin/env bash
source ./common.sh
requireGit
# Test a "vendored" subflake dependency. This is a relative path flake
# which doesn't reference the root flake and has its own lock file.
#
# This might occur in a monorepo for example. The root flake.lock is
# populated from the dependency's flake.lock.
rootFlake="$TEST_ROOT/flake1"
subflake="$rootFlake/sub"
depFlakeA="$TEST_ROOT/depFlakeA"
depFlakeB="$TEST_ROOT/depFlakeB"
rm -rf "$rootFlake"
mkdir -p "$rootFlake" "$subflake" "$depFlakeA" "$depFlakeB"
cat > "$depFlakeA/flake.nix" <<EOF
{
outputs = { self }: {
x = 11;
};
}
EOF
cat > "$depFlakeB/flake.nix" <<EOF
{
outputs = { self }: {
x = 13;
};
}
EOF
[[ $(nix eval "$depFlakeA#x") = 11 ]]
[[ $(nix eval "$depFlakeB#x") = 13 ]]
cat > "$subflake/flake.nix" <<EOF
{
inputs.dep.url = "path:$depFlakeA";
outputs = { self, dep }: {
inherit (dep) x;
y = self.x - 1;
};
}
EOF
cat > "$rootFlake/flake.nix" <<EOF
{
inputs.sub.url = ./sub;
outputs = { self, sub }: {
x = 2;
y = sub.y / self.x;
};
}
EOF
[[ $(nix eval "$subflake#y") = 10 ]]
[[ $(nix eval "$rootFlake#y") = 5 ]]
nix flake update --flake "path:$subflake" --override-input dep "$depFlakeB"
[[ $(nix eval "path:$subflake#y") = 12 ]]
# Expect that changes to sub/flake.lock are propagated to the root flake.
# FIXME: doesn't work at the moment #7730
[[ $(nix eval "$rootFlake#y") = 6 ]] || true
# This will force refresh flake.lock with changes from sub/flake.lock
nix flake update --flake "$rootFlake"
[[ $(nix eval "$rootFlake#y") = 6 ]]