7d38060a0d
A command like
$ nix run nixpkgs#hello
will now build the attribute 'packages.${system}.hello' rather than
'packages.hello'. Note that this does mean that the flake needs to
export an attribute for every system type it supports, and you can't
build on unsupported systems. So 'packages' typically looks like this:
packages = nixpkgs.lib.genAttrs ["x86_64-linux" "i686-linux"] (system: {
hello = ...;
});
The 'checks', 'defaultPackage', 'devShell', 'apps' and 'defaultApp'
outputs similarly are now attrsets that map system types to
derivations/apps. 'nix flake check' checks that the derivations for
all platforms evaluate correctly, but only builds the derivations in
'checks.${system}'.
Fixes #2861. (That issue also talks about access to ~/.config/nixpkgs
and --arg, but I think it's reasonable to say that flakes shouldn't
support those.)
The alternative to attribute selection is to pass the system type as
an argument to the flake's 'outputs' function, e.g. 'outputs = { self,
nixpkgs, system }: ...'. However, that approach would be at odds with
hermetic evaluation and make it impossible to enumerate the packages
provided by a flake.
432 lines
11 KiB
Bash
432 lines
11 KiB
Bash
source common.sh
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if [[ -z $(type -p git) ]]; then
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echo "Git not installed; skipping flake tests"
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exit 99
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fi
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export _NIX_FORCE_HTTP=1
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clearStore
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rm -rf $TEST_HOME/.cache
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registry=$TEST_ROOT/registry.json
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flake1Dir=$TEST_ROOT/flake1
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flake2Dir=$TEST_ROOT/flake2
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flake3Dir=$TEST_ROOT/flake3
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flake4Dir=$TEST_ROOT/flake4
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flake7Dir=$TEST_ROOT/flake7
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nonFlakeDir=$TEST_ROOT/nonFlake
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for repo in $flake1Dir $flake2Dir $flake3Dir $flake7Dir $nonFlakeDir; do
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rm -rf $repo $repo.tmp
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mkdir $repo
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git -C $repo init
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git -C $repo config user.email "foobar@example.com"
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git -C $repo config user.name "Foobar"
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done
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cat > $flake1Dir/flake.nix <<EOF
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{
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edition = 201909;
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description = "Bla bla";
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outputs = inputs: rec {
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packages.$system.foo = import ./simple.nix;
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defaultPackage.$system = packages.$system.foo;
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};
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}
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EOF
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cp ./simple.nix ./simple.builder.sh ./config.nix $flake1Dir/
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git -C $flake1Dir add flake.nix simple.nix simple.builder.sh config.nix
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git -C $flake1Dir commit -m 'Initial'
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cat > $flake2Dir/flake.nix <<EOF
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{
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edition = 201909;
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description = "Fnord";
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outputs = { self, flake1 }: rec {
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packages.$system.bar = flake1.packages.$system.foo;
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};
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}
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EOF
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git -C $flake2Dir add flake.nix
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git -C $flake2Dir commit -m 'Initial'
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cat > $flake3Dir/flake.nix <<EOF
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{
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edition = 201909;
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description = "Fnord";
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outputs = { self, flake2 }: rec {
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packages.$system.xyzzy = flake2.packages.$system.bar;
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checks = {
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xyzzy = packages.$system.xyzzy;
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};
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};
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}
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EOF
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git -C $flake3Dir add flake.nix
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git -C $flake3Dir commit -m 'Initial'
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cat > $nonFlakeDir/README.md <<EOF
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FNORD
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EOF
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git -C $nonFlakeDir add README.md
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git -C $nonFlakeDir commit -m 'Initial'
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cat > $registry <<EOF
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{
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"flakes": {
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"flake1": {
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"url": "file://$flake1Dir"
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},
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"flake2": {
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"url": "file://$flake2Dir"
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},
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"flake3": {
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"url": "file://$flake3Dir"
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},
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"flake4": {
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"url": "flake3"
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},
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"nixpkgs": {
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"url": "flake1"
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}
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},
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"version": 1
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}
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EOF
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# Test 'nix flake list'.
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(( $(nix flake list --flake-registry $registry | wc -l) == 5 ))
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# Test 'nix flake info'.
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nix flake info --flake-registry $registry flake1 | grep -q 'URL: .*flake1.*'
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# Test 'nix flake info' on a local flake.
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(cd $flake1Dir && nix flake info --flake-registry $registry) | grep -q 'URL: .*flake1.*'
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(cd $flake1Dir && nix flake info --flake-registry $registry .) | grep -q 'URL: .*flake1.*'
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nix flake info --flake-registry $registry $flake1Dir | grep -q 'URL: .*flake1.*'
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# Test 'nix flake info --json'.
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json=$(nix flake info --flake-registry $registry flake1 --json | jq .)
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[[ $(echo "$json" | jq -r .description) = 'Bla bla' ]]
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[[ -d $(echo "$json" | jq -r .path) ]]
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[[ $(echo "$json" | jq -r .lastModified) = $(git -C $flake1Dir log -n1 --format=%ct) ]]
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# Test 'nix build' on a flake.
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nix build -o $TEST_ROOT/result --flake-registry $registry flake1#foo
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[[ -e $TEST_ROOT/result/hello ]]
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# Test defaultPackage.
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nix build -o $TEST_ROOT/result --flake-registry $registry flake1
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[[ -e $TEST_ROOT/result/hello ]]
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nix build -o $TEST_ROOT/result --flake-registry $registry $flake1Dir
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nix build -o $TEST_ROOT/result --flake-registry $registry file://$flake1Dir
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# CHeck that store symlinks inside a flake are not interpreted as flakes.
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nix build -o $flake1Dir/result --flake-registry $registry file://$flake1Dir
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nix path-info $flake1Dir/result
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# Building a flake with an unlocked dependency should fail in pure mode.
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(! nix eval "(builtins.getFlake "$flake2Dir")")
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# But should succeed in impure mode.
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nix build -o $TEST_ROOT/result --flake-registry $registry flake2#bar --impure
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# Test automatic lock file generation.
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nix build -o $TEST_ROOT/result --flake-registry $registry $flake2Dir#bar
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[[ -e $flake2Dir/flake.lock ]]
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git -C $flake2Dir commit flake.lock -m 'Add flake.lock'
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# Rerunning the build should not change the lockfile.
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nix build -o $TEST_ROOT/result --flake-registry $registry $flake2Dir#bar
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[[ -z $(git -C $flake2Dir diff master) ]]
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# Building with a lockfile should not require a fetch of the registry.
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nix build -o $TEST_ROOT/result --flake-registry file:///no-registry.json $flake2Dir#bar --tarball-ttl 0
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# Updating the flake should not change the lockfile.
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nix flake update --flake-registry $registry $flake2Dir
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[[ -z $(git -C $flake2Dir diff master) ]]
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# Now we should be able to build the flake in pure mode.
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nix build -o $TEST_ROOT/result --flake-registry $registry flake2#bar
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# Or without a registry.
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# FIXME: shouldn't need '--flake-registry /no-registry'?
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nix build -o $TEST_ROOT/result --flake-registry /no-registry file://$flake2Dir#bar --tarball-ttl 0
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# Test whether indirect dependencies work.
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nix build -o $TEST_ROOT/result --flake-registry $registry $flake3Dir#xyzzy
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# Add dependency to flake3.
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rm $flake3Dir/flake.nix
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cat > $flake3Dir/flake.nix <<EOF
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{
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edition = 201909;
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description = "Fnord";
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outputs = { self, flake1, flake2 }: rec {
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packages.$system.xyzzy = flake2.packages.$system.bar;
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packages.$system."sth sth" = flake1.packages.$system.foo;
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};
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}
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EOF
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git -C $flake3Dir add flake.nix
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git -C $flake3Dir commit -m 'Update flake.nix'
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# Check whether `nix build` works with an incomplete lockfile
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nix build -o $TEST_ROOT/result --flake-registry $registry $flake3Dir#"sth sth"
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# Check whether it saved the lockfile
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[[ ! (-z $(git -C $flake3Dir diff master)) ]]
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git -C $flake3Dir add flake.lock
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git -C $flake3Dir commit -m 'Add lockfile'
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# Unsupported editions should be an error.
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sed -i $flake3Dir/flake.nix -e s/201909/201912/
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nix build -o $TEST_ROOT/result --flake-registry $registry $flake3Dir#sth 2>&1 | grep 'unsupported edition'
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# Test whether registry caching works.
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nix flake list --flake-registry file://$registry | grep -q flake3
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mv $registry $registry.tmp
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nix flake list --flake-registry file://$registry --tarball-ttl 0 | grep -q flake3
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mv $registry.tmp $registry
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# Test whether flakes are registered as GC roots for offline use.
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# FIXME: use tarballs rather than git.
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rm -rf $TEST_HOME/.cache
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nix build -o $TEST_ROOT/result --flake-registry file://$registry file://$flake2Dir#bar
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mv $flake1Dir $flake1Dir.tmp
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mv $flake2Dir $flake2Dir.tmp
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nix-store --gc
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nix build -o $TEST_ROOT/result --flake-registry file://$registry file://$flake2Dir#bar
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nix build -o $TEST_ROOT/result --flake-registry file://$registry file://$flake2Dir#bar --tarball-ttl 0
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mv $flake1Dir.tmp $flake1Dir
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mv $flake2Dir.tmp $flake2Dir
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# Add nonFlakeInputs to flake3.
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rm $flake3Dir/flake.nix
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cat > $flake3Dir/flake.nix <<EOF
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{
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edition = 201909;
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inputs = {
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flake1 = {};
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flake2 = {};
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nonFlake = {
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url = "$nonFlakeDir";
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flake = false;
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};
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};
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description = "Fnord";
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outputs = inputs: rec {
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packages.$system.xyzzy = inputs.flake2.packages.$system.bar;
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packages.$system.sth = inputs.flake1.packages.$system.foo;
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packages.$system.fnord =
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with import ./config.nix;
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mkDerivation {
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inherit system;
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name = "fnord";
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buildCommand = ''
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cat \${inputs.nonFlake}/README.md > \$out
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'';
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};
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};
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}
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EOF
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cp ./config.nix $flake3Dir
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git -C $flake3Dir add flake.nix config.nix
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git -C $flake3Dir commit -m 'Add nonFlakeInputs'
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# Check whether `nix build` works with a lockfile which is missing a
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# nonFlakeInputs.
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nix build -o $TEST_ROOT/result --flake-registry $registry $flake3Dir#sth
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git -C $flake3Dir add flake.lock
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git -C $flake3Dir commit -m 'Update nonFlakeInputs'
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nix build -o $TEST_ROOT/result --flake-registry $registry flake3#fnord
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[[ $(cat $TEST_ROOT/result) = FNORD ]]
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# Check whether flake input fetching is lazy: flake3#sth does not
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# depend on flake2, so this shouldn't fail.
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rm -rf $TEST_HOME/.cache
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clearStore
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mv $flake2Dir $flake2Dir.tmp
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mv $nonFlakeDir $nonFlakeDir.tmp
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nix build -o $TEST_ROOT/result --flake-registry $registry flake3#sth
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(! nix build -o $TEST_ROOT/result --flake-registry $registry flake3#xyzzy)
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(! nix build -o $TEST_ROOT/result --flake-registry $registry flake3#fnord)
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mv $flake2Dir.tmp $flake2Dir
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mv $nonFlakeDir.tmp $nonFlakeDir
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nix build -o $TEST_ROOT/result --flake-registry $registry flake3#xyzzy flake3#fnord
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# Test doing multiple `lookupFlake`s
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nix build -o $TEST_ROOT/result --flake-registry $registry flake4#xyzzy
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# Make branch "removeXyzzy" where flake3 doesn't have xyzzy anymore
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git -C $flake3Dir checkout -b removeXyzzy
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rm $flake3Dir/flake.nix
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cat > $flake3Dir/flake.nix <<EOF
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{
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edition = 201909;
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inputs = {
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nonFlake = {
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url = "$nonFlakeDir";
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flake = false;
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};
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};
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description = "Fnord";
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outputs = { self, flake1, flake2, nonFlake }: rec {
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packages.$system.sth = flake1.packages.$system.foo;
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packages.$system.fnord =
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with import ./config.nix;
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mkDerivation {
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inherit system;
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name = "fnord";
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buildCommand = ''
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cat \${nonFlake}/README.md > \$out
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'';
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};
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};
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}
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EOF
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git -C $flake3Dir add flake.nix
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git -C $flake3Dir commit -m 'Remove packages.xyzzy'
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git -C $flake3Dir checkout master
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# Test whether fuzzy-matching works for IsAlias
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(! nix build -o $TEST_ROOT/result --flake-registry $registry flake4/removeXyzzy#xyzzy)
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# Test whether fuzzy-matching works for IsGit
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(! nix build -o $TEST_ROOT/result --flake-registry $registry flake4/removeXyzzy#xyzzy)
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nix build -o $TEST_ROOT/result --flake-registry $registry flake4/removeXyzzy#sth
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# Testing the nix CLI
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nix flake add --flake-registry $registry flake1 flake3
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(( $(nix flake list --flake-registry $registry | wc -l) == 6 ))
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nix flake pin --flake-registry $registry flake1
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(( $(nix flake list --flake-registry $registry | wc -l) == 6 ))
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nix flake remove --flake-registry $registry flake1
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(( $(nix flake list --flake-registry $registry | wc -l) == 5 ))
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(cd $flake7Dir && nix flake init)
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nix flake --flake-registry $registry check $flake3Dir
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rm -rf $TEST_ROOT/flake1-v2
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nix flake clone --flake-registry $registry flake1 $TEST_ROOT/flake1-v2
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# More 'nix flake check' tests.
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cat > $flake3Dir/flake.nix <<EOF
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{
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edition = 201909;
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outputs = { flake1, self }: {
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overlay = final: prev: {
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};
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};
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}
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EOF
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nix flake check --flake-registry $registry $flake3Dir
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cat > $flake3Dir/flake.nix <<EOF
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{
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edition = 201909;
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outputs = { flake1, self }: {
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overlay = finalll: prev: {
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};
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};
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}
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EOF
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(! nix flake check --flake-registry $registry $flake3Dir)
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cat > $flake3Dir/flake.nix <<EOF
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{
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edition = 201909;
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outputs = { flake1, self }: {
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nixosModules.foo = {
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a.b.c = 123;
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foo = true;
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};
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};
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}
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EOF
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nix flake check --flake-registry $registry $flake3Dir
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cat > $flake3Dir/flake.nix <<EOF
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{
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edition = 201909;
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outputs = { flake1, self }: {
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nixosModules.foo = {
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a.b.c = 123;
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foo = assert false; true;
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};
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};
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}
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EOF
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(! nix flake check --flake-registry $registry $flake3Dir)
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cat > $flake3Dir/flake.nix <<EOF
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{
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edition = 201909;
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outputs = { flake1, self }: {
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nixosModule = { config, pkgs, ... }: {
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a.b.c = 123;
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};
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};
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}
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EOF
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nix flake check --flake-registry $registry $flake3Dir
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cat > $flake3Dir/flake.nix <<EOF
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{
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edition = 201909;
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outputs = { flake1, self }: {
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nixosModule = { config, pkgs }: {
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a.b.c = 123;
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};
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};
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}
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EOF
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(! nix flake check --flake-registry $registry $flake3Dir)
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