Put functional tests in `tests/functional`

I think it is bad for these reasons when `tests/` contains a mix of
functional and integration tests

 - Concepts is harder to understand, the documentation makes a good
   unit vs functional vs integration distinction, but when the
   integration tests are just two subdirs within `tests/` this is not
   clear.

 - Source filtering in the `flake.nix` is more complex. We need to
   filter out some of the dirs from `tests/`, rather than simply pick
   the dirs we want and take all of them. This is a good sign the
   structure of what we are trying to do is not matching the structure
   of the files.

With this change we have a clean:
```shell-session
$ git show 'HEAD:tests'
tree HEAD:tests

functional/
installer/
nixos/
```

(cherry picked from commit 68c81c737571794f7246db53fb4774e94fcf4b7e)

1 files changed, 0 insertions, 511 deletions

diff --git a/tests/flakes/flakes.sh b/tests/flakes/flakes.sh
deleted file mode 100644
index 128f759ea..000000000
--- a/tests/flakes/flakes.sh
+++ /dev/null
@@ -1,511 +0,0 @@
-source ./common.sh
-
-requireGit
-
-clearStore
-rm -rf $TEST_HOME/.cache $TEST_HOME/.config
-
-flake1Dir=$TEST_ROOT/flake1
-flake2Dir=$TEST_ROOT/flake2
-flake3Dir=$TEST_ROOT/flake3
-flake5Dir=$TEST_ROOT/flake5
-flake7Dir=$TEST_ROOT/flake7
-nonFlakeDir=$TEST_ROOT/nonFlake
-badFlakeDir=$TEST_ROOT/badFlake
-flakeGitBare=$TEST_ROOT/flakeGitBare
-
-for repo in $flake1Dir $flake2Dir $flake3Dir $flake7Dir $nonFlakeDir; do
-    # Give one repo a non-main initial branch.
-    extraArgs=
-    if [[ $repo == $flake2Dir ]]; then
-      extraArgs="--initial-branch=main"
-    fi
-
-    createGitRepo "$repo" "$extraArgs"
-done
-
-createSimpleGitFlake $flake1Dir
-
-cat > $flake2Dir/flake.nix <<EOF
-{
-  description = "Fnord";
-
-  outputs = { self, flake1 }: rec {
-    packages.$system.bar = flake1.packages.$system.foo;
-  };
-}
-EOF
-
-git -C $flake2Dir add flake.nix
-git -C $flake2Dir commit -m 'Initial'
-
-cat > $flake3Dir/flake.nix <<EOF
-{
-  description = "Fnord";
-
-  outputs = { self, flake2 }: rec {
-    packages.$system.xyzzy = flake2.packages.$system.bar;
-
-    checks = {
-      xyzzy = packages.$system.xyzzy;
-    };
-  };
-}
-EOF
-
-cat > $flake3Dir/default.nix <<EOF
-{ x = 123; }
-EOF
-
-git -C $flake3Dir add flake.nix default.nix
-git -C $flake3Dir commit -m 'Initial'
-
-cat > $nonFlakeDir/README.md <<EOF
-FNORD
-EOF
-
-git -C $nonFlakeDir add README.md
-git -C $nonFlakeDir commit -m 'Initial'
-
-# Construct a custom registry, additionally test the --registry flag
-nix registry add --registry $registry flake1 git+file://$flake1Dir
-nix registry add --registry $registry flake2 git+file://$flake2Dir
-nix registry add --registry $registry flake3 git+file://$flake3Dir
-nix registry add --registry $registry flake4 flake3
-nix registry add --registry $registry nixpkgs flake1
-
-# Test 'nix registry list'.
-[[ $(nix registry list | wc -l) == 5 ]]
-nix registry list | grep        '^global'
-nix registry list | grepInverse '^user' # nothing in user registry
-
-# Test 'nix flake metadata'.
-nix flake metadata flake1
-nix flake metadata flake1 | grepQuiet 'Locked URL:.*flake1.*'
-
-# Test 'nix flake metadata' on a local flake.
-(cd $flake1Dir && nix flake metadata) | grepQuiet 'URL:.*flake1.*'
-(cd $flake1Dir && nix flake metadata .) | grepQuiet 'URL:.*flake1.*'
-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)
-
-echo foo > $flake1Dir/foo
-git -C $flake1Dir add $flake1Dir/foo
-[[ $(nix flake metadata flake1 --json --refresh | jq -r .dirtyRevision) == "$hash1-dirty" ]]
-
-echo -n '# foo' >> $flake1Dir/flake.nix
-flake1OriginalCommit=$(git -C $flake1Dir rev-parse HEAD)
-git -C $flake1Dir commit -a -m 'Foo'
-flake1NewCommit=$(git -C $flake1Dir rev-parse HEAD)
-hash2=$(nix flake metadata flake1 --json --refresh | jq -r .revision)
-[[ $(nix flake metadata flake1 --json --refresh | jq -r .dirtyRevision) == "null" ]]
-[[ $hash1 != $hash2 ]]
-
-# Test 'nix build' on a flake.
-nix build -o $TEST_ROOT/result flake1#foo
-[[ -e $TEST_ROOT/result/hello ]]
-
-# Test packages.default.
-nix build -o $TEST_ROOT/result flake1
-[[ -e $TEST_ROOT/result/hello ]]
-
-nix build -o $TEST_ROOT/result $flake1Dir
-nix build -o $TEST_ROOT/result git+file://$flake1Dir
-
-# Check that store symlinks inside a flake are not interpreted as flakes.
-nix build -o $flake1Dir/result git+file://$flake1Dir
-nix path-info $flake1Dir/result
-
-# 'getFlake' on an unlocked flakeref should fail in pure mode, but
-# succeed in impure mode.
-(! nix build -o $TEST_ROOT/result --expr "(builtins.getFlake \"$flake1Dir\").packages.$system.default")
-nix build -o $TEST_ROOT/result --expr "(builtins.getFlake \"$flake1Dir\").packages.$system.default" --impure
-
-# 'getFlake' on a locked flakeref should succeed even in pure mode.
-nix build -o $TEST_ROOT/result --expr "(builtins.getFlake \"git+file://$flake1Dir?rev=$hash2\").packages.$system.default"
-
-# Building a flake with an unlocked dependency should fail in pure mode.
-(! nix build -o $TEST_ROOT/result flake2#bar --no-registries)
-(! nix build -o $TEST_ROOT/result flake2#bar --no-use-registries)
-(! nix eval --expr "builtins.getFlake \"$flake2Dir\"")
-
-# But should succeed in impure mode.
-(! nix build -o $TEST_ROOT/result flake2#bar --impure)
-nix build -o $TEST_ROOT/result flake2#bar --impure --no-write-lock-file
-nix eval --expr "builtins.getFlake \"$flake2Dir\"" --impure
-
-# Building a local flake with an unlocked dependency should fail with --no-update-lock-file.
-expect 1 nix build -o $TEST_ROOT/result $flake2Dir#bar --no-update-lock-file 2>&1 | grep 'requires lock file changes'
-
-# But it should succeed without that flag.
-nix build -o $TEST_ROOT/result $flake2Dir#bar --no-write-lock-file
-expect 1 nix build -o $TEST_ROOT/result $flake2Dir#bar --no-update-lock-file 2>&1 | grep 'requires lock file changes'
-nix build -o $TEST_ROOT/result $flake2Dir#bar --commit-lock-file
-[[ -e $flake2Dir/flake.lock ]]
-[[ -z $(git -C $flake2Dir diff main || echo failed) ]]
-
-# Rerunning the build should not change the lockfile.
-nix build -o $TEST_ROOT/result $flake2Dir#bar
-[[ -z $(git -C $flake2Dir diff main || echo failed) ]]
-
-# Building with a lockfile should not require a fetch of the registry.
-nix build -o $TEST_ROOT/result --flake-registry file:///no-registry.json $flake2Dir#bar --refresh
-nix build -o $TEST_ROOT/result --no-registries $flake2Dir#bar --refresh
-nix build -o $TEST_ROOT/result --no-use-registries $flake2Dir#bar --refresh
-
-# Updating the flake should not change the lockfile.
-nix flake lock $flake2Dir
-[[ -z $(git -C $flake2Dir diff main || echo failed) ]]
-
-# Now we should be able to build the flake in pure mode.
-nix build -o $TEST_ROOT/result flake2#bar
-
-# Or without a registry.
-nix build -o $TEST_ROOT/result --no-registries git+file://$flake2Dir#bar --refresh
-nix build -o $TEST_ROOT/result --no-use-registries git+file://$flake2Dir#bar --refresh
-
-# Test whether indirect dependencies work.
-nix build -o $TEST_ROOT/result $flake3Dir#xyzzy
-git -C $flake3Dir add flake.lock
-
-# Add dependency to flake3.
-rm $flake3Dir/flake.nix
-
-cat > $flake3Dir/flake.nix <<EOF
-{
-  description = "Fnord";
-
-  outputs = { self, flake1, flake2 }: rec {
-    packages.$system.xyzzy = flake2.packages.$system.bar;
-    packages.$system."sth sth" = flake1.packages.$system.foo;
-  };
-}
-EOF
-
-git -C $flake3Dir add flake.nix
-git -C $flake3Dir commit -m 'Update flake.nix'
-
-# Check whether `nix build` works with an incomplete lockfile
-nix build -o $TEST_ROOT/result $flake3Dir#"sth sth"
-nix build -o $TEST_ROOT/result $flake3Dir#"sth%20sth"
-
-# Check whether it saved the lockfile
-[[ -n $(git -C $flake3Dir diff master) ]]
-
-git -C $flake3Dir add flake.lock
-
-git -C $flake3Dir commit -m 'Add lockfile'
-
-# Test whether registry caching works.
-nix registry list --flake-registry file://$registry | grepQuiet flake3
-mv $registry $registry.tmp
-nix store gc
-nix registry list --flake-registry file://$registry --refresh | grepQuiet flake3
-mv $registry.tmp $registry
-
-# Test whether flakes are registered as GC roots for offline use.
-# FIXME: use tarballs rather than git.
-rm -rf $TEST_HOME/.cache
-nix store gc # get rid of copies in the store to ensure they get fetched to our git cache
-_NIX_FORCE_HTTP=1 nix build -o $TEST_ROOT/result git+file://$flake2Dir#bar
-mv $flake1Dir $flake1Dir.tmp
-mv $flake2Dir $flake2Dir.tmp
-nix store gc
-_NIX_FORCE_HTTP=1 nix build -o $TEST_ROOT/result git+file://$flake2Dir#bar
-_NIX_FORCE_HTTP=1 nix build -o $TEST_ROOT/result git+file://$flake2Dir#bar --refresh
-mv $flake1Dir.tmp $flake1Dir
-mv $flake2Dir.tmp $flake2Dir
-
-# Add nonFlakeInputs to flake3.
-rm $flake3Dir/flake.nix
-
-cat > $flake3Dir/flake.nix <<EOF
-{
-  inputs = {
-    flake1 = {};
-    flake2 = {};
-    nonFlake = {
-      url = git+file://$nonFlakeDir;
-      flake = false;
-    };
-    nonFlakeFile = {
-      url = path://$nonFlakeDir/README.md;
-      flake = false;
-    };
-    nonFlakeFile2 = {
-      url = "$nonFlakeDir/README.md";
-      flake = false;
-    };
-  };
-
-  description = "Fnord";
-
-  outputs = inputs: rec {
-    packages.$system.xyzzy = inputs.flake2.packages.$system.bar;
-    packages.$system.sth = inputs.flake1.packages.$system.foo;
-    packages.$system.fnord =
-      with import ./config.nix;
-      mkDerivation {
-        inherit system;
-        name = "fnord";
-        dummy = builtins.readFile (builtins.path { name = "source"; path = ./.; filter = path: type: baseNameOf path == "config.nix"; } + "/config.nix");
-        dummy2 = builtins.readFile (builtins.path { name = "source"; path = inputs.flake1; filter = path: type: baseNameOf path == "simple.nix"; } + "/simple.nix");
-        buildCommand = ''
-          cat \${inputs.nonFlake}/README.md > \$out
-          [[ \$(cat \${inputs.nonFlake}/README.md) = \$(cat \${inputs.nonFlakeFile}) ]]
-          [[ \${inputs.nonFlakeFile} = \${inputs.nonFlakeFile2} ]]
-        '';
-      };
-  };
-}
-EOF
-
-cp ../config.nix $flake3Dir
-
-git -C $flake3Dir add flake.nix config.nix
-git -C $flake3Dir commit -m 'Add nonFlakeInputs'
-
-# Check whether `nix build` works with a lockfile which is missing a
-# nonFlakeInputs.
-nix build -o $TEST_ROOT/result $flake3Dir#sth --commit-lock-file
-
-nix build -o $TEST_ROOT/result flake3#fnord
-[[ $(cat $TEST_ROOT/result) = FNORD ]]
-
-# Check whether flake input fetching is lazy: flake3#sth does not
-# depend on flake2, so this shouldn't fail.
-rm -rf $TEST_HOME/.cache
-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)
-mv $flake2Dir.tmp $flake2Dir
-mv $nonFlakeDir.tmp $nonFlakeDir
-nix build -o $TEST_ROOT/result flake3#xyzzy flake3#fnord
-
-# Test doing multiple `lookupFlake`s
-nix build -o $TEST_ROOT/result flake4#xyzzy
-
-# Test 'nix flake update' and --override-flake.
-nix flake lock $flake3Dir
-[[ -z $(git -C $flake3Dir diff master || echo failed) ]]
-
-nix flake update $flake3Dir --override-flake flake2 nixpkgs
-[[ ! -z $(git -C $flake3Dir diff master || echo failed) ]]
-
-# Make branch "removeXyzzy" where flake3 doesn't have xyzzy anymore
-git -C $flake3Dir checkout -b removeXyzzy
-rm $flake3Dir/flake.nix
-
-cat > $flake3Dir/flake.nix <<EOF
-{
-  inputs = {
-    nonFlake = {
-      url = "$nonFlakeDir";
-      flake = false;
-    };
-  };
-
-  description = "Fnord";
-
-  outputs = { self, flake1, flake2, nonFlake }: rec {
-    packages.$system.sth = flake1.packages.$system.foo;
-    packages.$system.fnord =
-      with import ./config.nix;
-      mkDerivation {
-        inherit system;
-        name = "fnord";
-        buildCommand = ''
-          cat \${nonFlake}/README.md > \$out
-        '';
-      };
-  };
-}
-EOF
-nix flake lock $flake3Dir
-git -C $flake3Dir add flake.nix flake.lock
-git -C $flake3Dir commit -m 'Remove packages.xyzzy'
-git -C $flake3Dir checkout master
-
-# Test whether fuzzy-matching works for registry entries.
-(! nix build -o $TEST_ROOT/result flake4/removeXyzzy#xyzzy)
-nix build -o $TEST_ROOT/result flake4/removeXyzzy#sth
-
-# Testing the nix CLI
-nix registry add flake1 flake3
-[[ $(nix registry list | wc -l) == 6 ]]
-nix registry pin flake1
-[[ $(nix registry list | wc -l) == 6 ]]
-nix registry pin flake1 flake3
-[[ $(nix registry list | wc -l) == 6 ]]
-nix registry remove flake1
-[[ $(nix registry list | wc -l) == 5 ]]
-
-# Test 'nix registry list' with a disabled global registry.
-nix registry add user-flake1 git+file://$flake1Dir
-nix registry add user-flake2 git+file://$flake2Dir
-[[ $(nix --flake-registry "" registry list | wc -l) == 2 ]]
-nix --flake-registry "" registry list | grepQuietInverse '^global' # nothing in global registry
-nix --flake-registry "" registry list | grepQuiet '^user'
-nix registry remove user-flake1
-nix registry remove user-flake2
-[[ $(nix registry list | wc -l) == 5 ]]
-
-# Test 'nix flake clone'.
-rm -rf $TEST_ROOT/flake1-v2
-nix flake clone flake1 --dest $TEST_ROOT/flake1-v2
-[ -e $TEST_ROOT/flake1-v2/flake.nix ]
-
-# Test 'follows' inputs.
-cat > $flake3Dir/flake.nix <<EOF
-{
-  inputs.foo = {
-    type = "indirect";
-    id = "flake1";
-  };
-  inputs.bar.follows = "foo";
-
-  outputs = { self, foo, bar }: {
-  };
-}
-EOF
-
-nix flake lock $flake3Dir
-[[ $(jq -c .nodes.root.inputs.bar $flake3Dir/flake.lock) = '["foo"]' ]]
-
-cat > $flake3Dir/flake.nix <<EOF
-{
-  inputs.bar.follows = "flake2/flake1";
-
-  outputs = { self, flake2, bar }: {
-  };
-}
-EOF
-
-nix flake lock $flake3Dir
-[[ $(jq -c .nodes.root.inputs.bar $flake3Dir/flake.lock) = '["flake2","flake1"]' ]]
-
-cat > $flake3Dir/flake.nix <<EOF
-{
-  inputs.bar.follows = "flake2";
-
-  outputs = { self, flake2, bar }: {
-  };
-}
-EOF
-
-nix flake lock $flake3Dir
-[[ $(jq -c .nodes.root.inputs.bar $flake3Dir/flake.lock) = '["flake2"]' ]]
-
-# Test overriding inputs of inputs.
-writeTrivialFlake $flake7Dir
-git -C $flake7Dir add flake.nix
-git -C $flake7Dir commit -m 'Initial'
-
-cat > $flake3Dir/flake.nix <<EOF
-{
-  inputs.flake2.inputs.flake1 = {
-    type = "git";
-    url = file://$flake7Dir;
-  };
-
-  outputs = { self, flake2 }: {
-  };
-}
-EOF
-
-nix flake lock $flake3Dir
-[[ $(jq .nodes.flake1.locked.url $flake3Dir/flake.lock) =~ flake7 ]]
-
-cat > $flake3Dir/flake.nix <<EOF
-{
-  inputs.flake2.inputs.flake1.follows = "foo";
-  inputs.foo.url = git+file://$flake7Dir;
-
-  outputs = { self, flake2 }: {
-  };
-}
-EOF
-
-nix flake update $flake3Dir
-[[ $(jq -c .nodes.flake2.inputs.flake1 $flake3Dir/flake.lock) =~ '["foo"]' ]]
-[[ $(jq .nodes.foo.locked.url $flake3Dir/flake.lock) =~ flake7 ]]
-
-# Test git+file with bare repo.
-rm -rf $flakeGitBare
-git clone --bare $flake1Dir $flakeGitBare
-nix build -o $TEST_ROOT/result git+file://$flakeGitBare
-
-# Test path flakes.
-mkdir -p $flake5Dir
-writeDependentFlake $flake5Dir
-nix flake lock path://$flake5Dir
-
-# Test tarball flakes.
-tar cfz $TEST_ROOT/flake.tar.gz -C $TEST_ROOT flake5
-
-nix build -o $TEST_ROOT/result file://$TEST_ROOT/flake.tar.gz
-
-# Building with a tarball URL containing a SRI hash should also work.
-url=$(nix flake metadata --json file://$TEST_ROOT/flake.tar.gz | jq -r .url)
-[[ $url =~ sha256- ]]
-
-nix build -o $TEST_ROOT/result $url
-
-# Building with an incorrect SRI hash should fail.
-expectStderr 102 nix build -o $TEST_ROOT/result "file://$TEST_ROOT/flake.tar.gz?narHash=sha256-qQ2Zz4DNHViCUrp6gTS7EE4+RMqFQtUfWF2UNUtJKS0=" | grep 'NAR hash mismatch'
-
-# Test --override-input.
-git -C $flake3Dir reset --hard
-nix flake lock $flake3Dir --override-input flake2/flake1 file://$TEST_ROOT/flake.tar.gz -vvvvv
-[[ $(jq .nodes.flake1_2.locked.url $flake3Dir/flake.lock) =~ flake.tar.gz ]]
-
-nix flake lock $flake3Dir --override-input flake2/flake1 flake1
-[[ $(jq -r .nodes.flake1_2.locked.rev $flake3Dir/flake.lock) =~ $hash2 ]]
-
-nix flake lock $flake3Dir --override-input flake2/flake1 flake1/master/$hash1
-[[ $(jq -r .nodes.flake1_2.locked.rev $flake3Dir/flake.lock) =~ $hash1 ]]
-
-# Test --update-input.
-nix flake lock $flake3Dir
-[[ $(jq -r .nodes.flake1_2.locked.rev $flake3Dir/flake.lock) = $hash1 ]]
-
-nix flake lock $flake3Dir --update-input flake2/flake1
-[[ $(jq -r .nodes.flake1_2.locked.rev $flake3Dir/flake.lock) =~ $hash2 ]]
-
-# Test 'nix flake metadata --json'.
-nix flake metadata $flake3Dir --json | jq .
-
-# Test flake in store does not evaluate.
-rm -rf $badFlakeDir
-mkdir $badFlakeDir
-echo INVALID > $badFlakeDir/flake.nix
-nix store delete $(nix store add-path $badFlakeDir)
-
-[[ $(nix path-info      $(nix store add-path $flake1Dir)) =~ flake1 ]]
-[[ $(nix path-info path:$(nix store add-path $flake1Dir)) =~ simple ]]
-
-# Test fetching flakerefs in the legacy CLI.
-[[ $(nix-instantiate --eval flake:flake3 -A x) = 123 ]]
-[[ $(nix-instantiate --eval flake:git+file://$flake3Dir -A x) = 123 ]]
-[[ $(nix-instantiate -I flake3=flake:flake3 --eval '<flake3>' -A x) = 123 ]]
-[[ $(NIX_PATH=flake3=flake:flake3 nix-instantiate --eval '<flake3>' -A x) = 123 ]]
-
-# Test alternate lockfile paths.
-nix flake lock $flake2Dir --output-lock-file $TEST_ROOT/flake2.lock
-cmp $flake2Dir/flake.lock $TEST_ROOT/flake2.lock >/dev/null # lockfiles should be identical, since we're referencing flake2's original one
-
-nix flake lock $flake2Dir --output-lock-file $TEST_ROOT/flake2-overridden.lock --override-input flake1 git+file://$flake1Dir?rev=$flake1OriginalCommit
-expectStderr 1 cmp $flake2Dir/flake.lock $TEST_ROOT/flake2-overridden.lock
-nix flake metadata $flake2Dir --reference-lock-file $TEST_ROOT/flake2-overridden.lock | grepQuiet $flake1OriginalCommit
-
-# reference-lock-file can only be used if allow-dirty is set.
-expectStderr 1 nix flake metadata $flake2Dir --no-allow-dirty --reference-lock-file $TEST_ROOT/flake2-overridden.lock