pnpmConfigHook: allow opt-out

This is sometimes useful when mixing ecosystems, e.g. in buildGoModule.

doc/languages-frameworks/javascript.section.md

@@ -408,6 +408,8 @@ In case you are patching `package.json` or `pnpm-lock.yaml`, make sure to pass `
 }
 ```
 
+If needed, `dontPnpmConfigure = true;` can be used to fully disable `pnpmConfigHook` without manually removing it from inputs.
+
 #### Dealing with `sourceRoot` {#javascript-pnpm-sourceRoot}
 
 If the pnpm project is in a subdirectory, you can just define `sourceRoot` or `setSourceRoot` for `fetchPnpmDeps`.

pkgs/build-support/node/fetch-pnpm-deps/pnpm-config-hook.sh

@@ -118,4 +118,6 @@ pnpmConfigHook() {
     echo "Finished pnpmConfigHook"
 }
 
-postConfigureHooks+=(pnpmConfigHook)
+if [ -z "${dontPnpmConfigure-}" ]; then
+  postConfigureHooks+=(pnpmConfigHook)
+fi