Bring back the forceNpm option

README.md

@@ -185,6 +185,24 @@ Because the configuration loader depends on this setting, its output is not
 affected by this setting. If you want to debug the configuration set
 `DEBUG_ISOLATE_CONFIG=true` before you run `isolate`
 
+### forceNpm
+
+Type: `boolean`, default: `false`
+
+By default the isolate process will generate output based on the package manager
+that you are using for your monorepo, but your deployment target might not be
+compatible with that package manager.
+
+It should not really matter what package manager is used in de deployment as
+long as the versions match your original lockfile.
+
+By setting this option to `true` you are forcing the isolate output to use NPM.
+A package-lock file will be generated based on the contents of node_modules and
+therefore should match the versions in your original lockfile.
+
+This way you can enjoy using PNPM or Yarn for your monorepo, while your
+deployment requires NPM.
+
 ### buildDirName
 
 Type: `string | undefined`, default: `undefined`

package.json

@@ -1,6 +1,6 @@
 {
   "name": "isolate-package",
-  "version": "1.19.0",
+  "version": "1.20.0-1",
   "description": "Isolate a monorepo package with its shared dependencies to form a self-contained directory, compatible with Firebase deploy",
   "author": "Thijs Koerselman",
   "license": "MIT",

src/isolate.ts

@@ -195,7 +195,7 @@ export async function isolate(
     await writeManifest(isolateDir, manifest);
   }
 
-  if (packageManager.name === "pnpm") {
+  if (packageManager.name === "pnpm" && !config.forceNpm) {
     /**
      * PNPM doesn't install dependencies of packages that are linked via link:
      * or file: specifiers. It requires the directory to be configured as a

src/lib/lockfile/process-lockfile.ts

@@ -1,3 +1,4 @@
+import { useConfig } from "../config";
 import { useLogger } from "../logger";
 import { usePackageManager } from "../package-manager";
 import type { PackageManifest, PackagesRegistry } from "../types";
@@ -32,6 +33,19 @@ export async function processLockfile({
 }) {
   const log = useLogger();
 
+  const { forceNpm } = useConfig();
+
+  if (forceNpm) {
+    log.info("Forcing to use NPM for isolate output");
+
+    await generateNpmLockfile({
+      workspaceRootDir,
+      isolateDir,
+    });
+
+    return true;
+  }
+
   const { name, majorVersion } = usePackageManager();
   let usedFallbackToNpm = false;
 

src/lib/manifest/adapt-target-package-manifest.ts

@@ -26,6 +26,7 @@ export async function adaptTargetPackageManifest({
     pickFromScripts,
     omitFromScripts,
     omitPackageManager,
+    forceNpm,
   } = useConfig();
 
   /** Dev dependencies are omitted by default */
@@ -34,7 +35,7 @@ export async function adaptTargetPackageManifest({
     : omit(manifest, ["devDependencies"]);
 
   const adaptedManifest =
-    packageManager.name === "pnpm"
+    packageManager.name === "pnpm" && !forceNpm
       ? /**
          * For PNPM the output itself is a workspace so we can preserve the specifiers
          * with "workspace:*" in the output manifest, but we do want to adopt the

src/lib/manifest/helpers/adapt-internal-package-manifests.ts

@@ -1,5 +1,6 @@
 import path from "node:path";
 import { omit } from "remeda";
+import { useConfig } from "~/lib/config";
 import { usePackageManager } from "~/lib/package-manager";
 import type { PackagesRegistry } from "~/lib/types";
 import { writeManifest } from "../io";
@@ -16,6 +17,7 @@ export async function adaptInternalPackageManifests(
   isolateDir: string
 ) {
   const packageManager = usePackageManager();
+  const { forceNpm } = useConfig();
 
   await Promise.all(
     internalPackageNames.map(async (packageName) => {
@@ -25,7 +27,7 @@ export async function adaptInternalPackageManifests(
       const strippedManifest = omit(manifest, ["scripts", "devDependencies"]);
 
       const outputManifest =
-        packageManager.name === "pnpm"
+        packageManager.name === "pnpm" && !forceNpm
           ? /**
              * For PNPM the output itself is a workspace so we can preserve the specifiers
              * with "workspace:*" in the output manifest.