flake-modules/devshell: update tests command with link-farm support

Since we're using link-farms, we need to access the underlying tests as
`passthru.entries.*`.

flake-modules/dev/devshell.nix

@@ -7,6 +7,7 @@
       lib,
       pkgs,
       config,
+      self',
       system,
       ...
     }:
@@ -44,9 +45,27 @@
 
                     text = builtins.readFile ./launch-test.sh;
                   };
+
+                  tests =
+                    let
+                      checks' = self'.checks;
+                      names = builtins.filter (n: builtins.match "test-.*" n != null) (builtins.attrNames checks');
+                    in
+                    builtins.listToAttrs (
+                      builtins.concatMap (
+                        checkName:
+                        map (testName: {
+                          name = testName;
+                          value = "${checkName}.passthru.entries.${testName}";
+                        }) (builtins.attrNames checks'.${checkName}.passthru.entries)
+                      ) names
+                    );
                 in
                 ''
-                  NIXVIM_SYSTEM=${system} NIXVIM_NIX_COMMAND=${nix} ${lib.getExe launchTest} "$@"
+                  export NIXVIM_SYSTEM=${system}
+                  export NIXVIM_NIX_COMMAND=${nix}
+                  export NIXVIM_TESTS=${pkgs.writers.writeJSON "tests.json" tests}
+                  ${lib.getExe launchTest} "$@"
                 '';
             }
             {

flake-modules/dev/launch-test.sh

@@ -36,8 +36,7 @@ nix_args=()
 interactive=false
 
 mk_test_list() {
-  nix eval ".#checks.${system}" --apply builtins.attrNames --json |
-    jq -r 'map(select(startswith("test-")))[]'
+  jq -r 'keys[]' "${NIXVIM_TESTS}"
 }
 
 while true; do
@@ -72,9 +71,26 @@ while true; do
   esac
 done
 
+get_tests() {
+  # Convert bash array to jq query
+  # e.g. (foo bar baz) => ."foo",."bar",."baz"
+  readarray -t queries < <(
+    for test in "$@"; do
+      echo '."'"$test"'"'
+    done
+  )
+  query=$(
+    IFS=,
+    echo "${queries[*]}"
+  )
+  for test in $(jq -r "${query}" "${NIXVIM_TESTS}"); do
+    echo "checks.${system}.${test}"
+  done
+}
+
 run_tests() {
-  # Add the prefix "checks.${system}." to each argument
-  if ! "${NIXVIM_NIX_COMMAND}" build "${nix_args[@]}" --no-link --file . "${@/#/checks.${system}.}"; then
+  readarray -t test_list < <(get_tests "$@")
+  if ! "${NIXVIM_NIX_COMMAND}" build "${nix_args[@]}" --no-link --file . "${test_list[@]}"; then
     echo "Test failure" >&2
     exit 1
   fi