Early fail for nodejs versions >= 15

nodejs versions >= 15 use npm >= 7, which uses a new lockfile version
that's currently not supported by npmlock2nix. Hook scripts, which
npmlock2nix relies on are also removed

internal.nix

@@ -1,6 +1,8 @@
-{ nodejs, stdenv, mkShell, lib, fetchurl, writeText, writeTextFile, runCommand, fetchFromGitHub }:
+{ nodejs-14_x, stdenv, mkShell, lib, fetchurl, writeText, writeTextFile, runCommand, fetchFromGitHub }:
 rec {
-  default_nodejs = nodejs;
+  # Versions >= 15 use npm >= 7, which uses npm lockfile version 2, which we don't support yet
+  # See the assertion in the node_modules function
+  default_nodejs = nodejs-14_x;
 
 
   # builtins.fetchGit wrapper that ensures compatibility with Nix 2.3 and Nix 2.4
@@ -318,6 +320,8 @@ rec {
     , passthru ? { }
     , ...
     }@args:
+      assert lib.versionAtLeast nodejs.version "15.0" ->
+        throw "npmlock2nix is called with nodejs version ${nodejs.version}, which is currently not supported, see https://github.com/nix-community/npmlock2nix/issues/153 for more information";
       assert (builtins.typeOf preInstallLinks != "set") ->
         throw "`preInstallLinks` must be an attributeset of attributesets";
       let

tests/integration-tests/default.nix

@@ -256,19 +256,15 @@ testLib.makeIntegrationTests {
     evalFailure = true;
     status = 1;
     expected = "";
-    expected-stderr = [
-      {
-        contains = ''
-          npm WARN old lockfile The package-lock.json file was created with an old version of npm,
-          npm WARN old lockfile so supplemental metadata must be fetched from the registry.
-        '';
-      }
-      {
-        contains = ''
-          npm ERR! Error: EACCES: permission denied, open '/build/package-lock.json'
-        '';
-      }
-    ];
+    # Would fail with
+    # npm WARN old lockfile The package-lock.json file was created with an old version of npm,
+    # npm WARN old lockfile so supplemental metadata must be fetched from the registry.
+    # npm ERR! Error: EACCES: permission denied, open '/build/package-lock.json'
+    expected-stderr = {
+      contains = ''
+        error: [npmlock2nix] npmlock2nix is called with nodejs version 16.13.0, which is currently not supported, see https://github.com/nix-community/npmlock2nix/issues/153 for more information
+      '';
+    };
   };
 
   npm7-new-lockfile = {
@@ -280,9 +276,11 @@ testLib.makeIntegrationTests {
     evalFailure = true;
     status = 1;
     expected = "";
+    # Would fail with
+    # npm ERR! request to https://registry.npmjs.org/leftpad/-/leftpad-0.0.1.tgz failed: cache mode is 'only-if-cached' but no cached response is available.
     expected-stderr = {
       contains = ''
-        npm ERR! request to https://registry.npmjs.org/leftpad/-/leftpad-0.0.1.tgz failed: cache mode is 'only-if-cached' but no cached response is available.
+        error: [npmlock2nix] npmlock2nix is called with nodejs version 16.13.0, which is currently not supported, see https://github.com/nix-community/npmlock2nix/issues/153 for more information
       '';
     };
   };

tests/node-modules.nix

@@ -75,9 +75,15 @@ testLib.runTests {
   testNodeModulesAcceptsCustomNodejs = {
     expr = (npmlock2nix.node_modules {
       src = ./examples-projects/no-dependencies;
-      nodejs = "our-custom-nodejs-package";
+      nodejs = {
+        pname = "our-custom-nodejs-package";
+        version = "14.12.34";
+      };
     }).nodejs;
-    expected = "our-custom-nodejs-package";
+    expected = {
+      pname = "our-custom-nodejs-package";
+      version = "14.12.34";
+    };
   };
 
   testNodeModulesPropagatesNodejs =