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Improve regression testing for uncachable source paths

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These now throw an error by default in the test suite.
This commit is contained in:
Eelco Dolstra 2025-06-16 18:25:55 +02:00
parent a175c67def
commit 3a4e6cadeb
7 changed files with 19 additions and 12 deletions
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8
src/libfetchers/fetch-to-store.cc
View file

@ -55,9 +55,13 @@ std::pair<StorePath, Hash> fetchToStore2(
}
debug("source path '%s' not in store", path);
}
} else
} else {
static auto barf = getEnv("_NIX_TEST_BARF_ON_UNCACHEABLE").value_or("") == "1";
if (barf)
throw Error("source path '%s' is uncacheable (filter=%d)", path, (bool) filter);
// FIXME: could still provide in-memory caching keyed on `SourcePath`.
debug("source path '%s' is uncacheable (%d, %d)", path, (bool) filter, (bool) fingerprint);
debug("source path '%s' is uncacheable", path);
}
Activity act(*logger, lvlChatty, actUnknown,
fmt(mode == FetchMode::DryRun ? "hashing '%s'" : "copying '%s' to the store", path));

2
tests/functional/flakes/common.sh
View file

@ -2,6 +2,8 @@
source ../common.sh
export _NIX_TEST_BARF_ON_UNCACHEABLE=1
# shellcheck disable=SC2034 # this variable is used by tests that source this file
registry=$TEST_ROOT/registry.json

6
tests/functional/flakes/flake-in-submodule.sh
View file

@ -62,8 +62,8 @@ flakeref=git+file://$rootRepo\?submodules=1\&dir=submodule
# Check that dirtying a submodule makes the entire thing dirty.
[[ $(nix flake metadata --json "$flakeref" | jq -r .locked.rev) != null ]]
echo '"foo"' > "$rootRepo"/submodule/sub.nix
[[ $(nix eval --json "$flakeref#sub" ) = '"foo"' ]]
[[ $(nix flake metadata --json "$flakeref" | jq -r .locked.rev) = null ]]
[[ $(_NIX_TEST_BARF_ON_UNCACHEABLE='' nix eval --json "$flakeref#sub" ) = '"foo"' ]]
[[ $(_NIX_TEST_BARF_ON_UNCACHEABLE='' nix flake metadata --json "$flakeref" | jq -r .locked.rev) = null ]]
# Test that `nix flake metadata` parses `submodule` correctly.
cat > "$rootRepo"/flake.nix <<EOF
@ -75,7 +75,7 @@ EOF
git -C "$rootRepo" add flake.nix
git -C "$rootRepo" commit -m "Add flake.nix"
storePath=$(nix flake prefetch --json "$rootRepo?submodules=1" | jq -r .storePath)
storePath=$(_NIX_TEST_BARF_ON_UNCACHEABLE='' nix flake prefetch --json "$rootRepo?submodules=1" | jq -r .storePath)
[[ -e "$storePath/submodule" ]]
# Test the use of inputs.self.

1
tests/functional/flakes/flakes.sh
View file

@ -114,7 +114,6 @@ nix build -o "$TEST_ROOT/result" "git+file://$flake1Dir?ref=HEAD#default"
# Check that the fetcher cache works.
if [[ $(nix config show lazy-trees) = false ]]; then
nix build -o "$TEST_ROOT/result" "git+file://$flake1Dir?ref=HEAD#default" -vvvvv 2>&1 | grepQuietInverse "source path.*is uncacheable"
nix build -o "$TEST_ROOT/result" "git+file://$flake1Dir?ref=HEAD#default" -vvvvv 2>&1 | grepQuiet "source path.*cache hit"
fi

4
tests/functional/flakes/mercurial.sh
View file

@ -27,9 +27,9 @@ nix build -o "$TEST_ROOT/result" "hg+file://$flake2Dir"
(! nix flake metadata --json "hg+file://$flake2Dir" | jq -e -r .revision)
nix eval "hg+file://$flake2Dir"#expr
_NIX_TEST_BARF_ON_UNCACHEABLE='' nix eval "hg+file://$flake2Dir"#expr
nix eval "hg+file://$flake2Dir"#expr
_NIX_TEST_BARF_ON_UNCACHEABLE='' nix eval "hg+file://$flake2Dir"#expr
(! nix eval "hg+file://$flake2Dir"#expr --no-allow-dirty)

8
tests/functional/flakes/non-flake-inputs.sh
View file

@ -72,7 +72,7 @@ nix build -o "$TEST_ROOT/result" "$flake3Dir#sth" --commit-lock-file
nix registry add --registry "$registry" flake3 "git+file://$flake3Dir"
nix build -o "$TEST_ROOT/result" flake3#fnord
_NIX_TEST_BARF_ON_UNCACHEABLE='' nix build -o "$TEST_ROOT/result" flake3#fnord
[[ $(cat "$TEST_ROOT/result") = FNORD ]]
# Check whether flake input fetching is lazy: flake3#sth does not
@ -82,11 +82,11 @@ clearStore
mv "$flake2Dir" "$flake2Dir.tmp"
mv "$nonFlakeDir" "$nonFlakeDir.tmp"
nix build -o "$TEST_ROOT/result" flake3#sth
(! nix build -o "$TEST_ROOT/result" flake3#xyzzy)
(! nix build -o "$TEST_ROOT/result" flake3#fnord)
(! _NIX_TEST_BARF_ON_UNCACHEABLE='' nix build -o "$TEST_ROOT/result" flake3#xyzzy)
(! _NIX_TEST_BARF_ON_UNCACHEABLE='' nix build -o "$TEST_ROOT/result" flake3#fnord)
mv "$flake2Dir.tmp" "$flake2Dir"
mv "$nonFlakeDir.tmp" "$nonFlakeDir"
nix build -o "$TEST_ROOT/result" flake3#xyzzy flake3#fnord
_NIX_TEST_BARF_ON_UNCACHEABLE='' nix build -o "$TEST_ROOT/result" flake3#xyzzy flake3#fnord
# Make branch "removeXyzzy" where flake3 doesn't have xyzzy anymore
git -C "$flake3Dir" checkout -b removeXyzzy

2
tests/functional/flakes/relative-paths-lockfile.sh
View file

@ -4,6 +4,8 @@ source ./common.sh
requireGit
unset _NIX_TEST_BARF_ON_UNCACHEABLE
# Test a "vendored" subflake dependency. This is a relative path flake
# which doesn't reference the root flake and has its own lock file.
#