tests: cleanup tests to better use callTest pattern

e.g. Prefer taking `pkgs.*` attrs directly as function arguments.

tests/enable-except-in-tests.nix

@@ -1,5 +1,7 @@
 {
   pkgs,
+  linkFarm,
+  runCommandNoCCLocal,
   mkTestDerivationFromNixvimModule,
   makeNixvimWithModule,
 }:
@@ -19,7 +21,7 @@ let
     let
       nvim = makeNixvimWithModule { inherit pkgs module; };
     in
-    pkgs.runCommand "enable-except-in-tests-not-in-test"
+    runCommandNoCCLocal "enable-except-in-tests-not-in-test"
       { printConfig = "${nvim}/bin/nixvim-print-init"; }
       ''
         if ! "$printConfig" | grep 'require("image").setup'; then
@@ -31,7 +33,7 @@ let
         touch $out
       '';
 in
-pkgs.linkFarm "enable-except-in-tests" [
+linkFarm "enable-except-in-tests" [
   {
     name = "in-test";
     path = inTest;

tests/extend.nix

@@ -1,4 +1,7 @@
-{ makeNixvimWithModule, pkgs }:
+{
+  makeNixvimWithModule,
+  runCommandNoCCLocal,
+}:
 let
   firstStage = makeNixvimWithModule {
     module = {
@@ -10,7 +13,7 @@ let
 
   generated = secondStage.extend { extraConfigLua = "-- third stage"; };
 in
-pkgs.runCommand "extend-test" { printConfig = "${generated}/bin/nixvim-print-init"; } ''
+runCommandNoCCLocal "extend-test" { printConfig = "${generated}/bin/nixvim-print-init"; } ''
   config=$($printConfig)
   for stage in "first" "second" "third"; do
     if ! "$printConfig" | grep -q -- "-- $stage stage"; then

tests/extra-args.nix

@@ -1,4 +1,7 @@
-{ makeNixvimWithModule, pkgs }:
+{
+  makeNixvimWithModule,
+  runCommandNoCCLocal,
+}:
 let
   defaultModule =
     { regularArg, ... }:
@@ -28,7 +31,7 @@ let
     };
   };
 in
-pkgs.runCommand "special-arg-test" { printConfig = "${generated}/bin/nixvim-print-init"; } ''
+runCommandNoCCLocal "special-arg-test" { printConfig = "${generated}/bin/nixvim-print-init"; } ''
   config=$($printConfig)
   if ! "$printConfig" | grep -- '-- regularArg=regularValue'; then
     echo "Missing regularArg in config"

tests/extra-files.nix

@@ -1,4 +1,7 @@
-{ makeNixvimWithModule, pkgs }:
+{
+  makeNixvimWithModule,
+  runCommandNoCCLocal,
+}:
 let
   extraFiles = {
     "one".text = "one";
@@ -12,7 +15,7 @@ let
     };
   };
 in
-pkgs.runCommand "extra-files-test"
+runCommandNoCCLocal "extra-files-test"
   {
     root = build.config.build.extraFiles;
     files = builtins.attrNames extraFiles;

tests/lib-tests.nix

@@ -1,9 +1,10 @@
 # For shorter test iterations run the following in the root of the repo:
 #   `echo ':b checks.${builtins.currentSystem}.lib-tests' | nix repl .`
 {
-  lib,
-  pkgs,
   helpers,
+  lib,
+  runCommandNoCCLocal,
+  writeText,
 }:
 let
   luaNames = {
@@ -45,9 +46,9 @@ let
     ];
   };
 
-  drv = pkgs.writeText "example-derivation" "hello, world!";
+  drv = writeText "example-derivation" "hello, world!";
 
-  results = pkgs.lib.runTests {
+  results = lib.runTests {
     testToLuaObject = {
       expr = helpers.toLuaObject {
         foo = "bar";
@@ -412,11 +413,11 @@ let
   };
 in
 if results == [ ] then
-  pkgs.runCommand "lib-tests-success" { } "touch $out"
+  runCommandNoCCLocal "lib-tests-success" { } "touch $out"
 else
-  pkgs.runCommand "lib-tests-failure"
+  runCommandNoCCLocal "lib-tests-failure"
     {
-      results = pkgs.lib.concatStringsSep "\n" (
+      results = lib.concatStringsSep "\n" (
         builtins.map (result: ''
           ${result.name}:
             expected: ${lib.generators.toPretty { } result.expected}

tests/main.nix

@@ -4,6 +4,7 @@
   callTest,
   helpers,
   lib ? pkgs.lib,
+  linkFarm,
   pkgs,
   pkgsUnfree,
 }:
@@ -54,14 +55,14 @@ lib.pipe (testFiles ++ [ exampleFiles ]) [
     }:
     {
       inherit name;
-      path = pkgs.linkFarm name (builtins.mapAttrs (moduleToTest file) cases);
+      path = linkFarm name (builtins.mapAttrs (moduleToTest file) cases);
     }
   ))
   (helpers.groupListBySize 10)
   (lib.imap1 (
     i: group: rec {
       name = "test-${toString i}";
-      value = pkgs.linkFarm name group;
+      value = linkFarm name group;
     }
   ))
   builtins.listToAttrs

tests/maintainers.nix

@@ -1,6 +1,6 @@
 {
-  pkgs ? import <nixpkgs> { },
+  lib,
-  lib ? pkgs.lib,
+  runCommandNoCCLocal,
 }:
 let
   inherit (lib) attrNames filter length;
@@ -9,7 +9,7 @@ let
   duplicates = filter (name: nixpkgsList ? ${name}) (attrNames nixvimList);
   count = length duplicates;
 in
-pkgs.runCommand "maintainers-test" { inherit count duplicates; } ''
+runCommandNoCCLocal "maintainers-test" { inherit count duplicates; } ''
   if [ $count -gt 0 ]; then
     echo "$count nixvim maintainers are also nixpkgs maintainers:"
     for name in $duplicates; do