feat(install-dynamic-plugins): add @red-hat-developer-hub/cli-module-install-dynamic-plugins

workspaces/install-dynamic-plugins/.changeset/README.md

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+# Changesets
+
+Hello and welcome! This folder has been automatically generated by `@changesets/cli`, a build tool that works
+with multi-package repos, or single-package repos to help you version and publish your code. You can
+find the full documentation for it [in our repository](https://github.com/changesets/changesets)
+
+We have a quick list of common questions to get you started engaging with this project in
+[our documentation](https://github.com/changesets/changesets/blob/main/docs/common-questions.md)

workspaces/install-dynamic-plugins/.changeset/config.json

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+{
+  "$schema": "https://unpkg.com/@changesets/config@3.0.0/schema.json",
+  "changelog": "@changesets/cli/changelog",
+  "commit": false,
+  "fixed": [],
+  "linked": [],
+  "access": "public",
+  "baseBranch": "main",
+  "updateInternalDependencies": "patch"
+}

workspaces/install-dynamic-plugins/.changeset/initial-release.md

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+---
+'@red-hat-developer-hub/cli-module-install-dynamic-plugins': minor
+---
+
+Initial release. TypeScript/Node.js port of the RHDH init-container installer (originally Python; see [redhat-developer/rhdh#4574](https://github.com/redhat-developer/rhdh/pull/4574)), packaged as a Backstage CLI module. The `install` command is registered through `createCliModule` so the package is auto-discovered by `backstage-cli` when listed as a dependency. The package also ships a self-contained esbuild bundle as its `bin`, so direct `npx install-dynamic-plugins <dir>` invocations (and RHDH's init-container `COPY` of the `.cjs`) stay fast and don't require `@backstage/cli-node` at runtime. Env vars, on-disk layout, `plugin-hash` format, and tar/OCI security guards are byte-compatible with the previous Python implementation.

workspaces/install-dynamic-plugins/.eslintrc.js

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+module.exports = require('../../.eslintrc.cjs');

workspaces/install-dynamic-plugins/.gitignore

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+# macOS
+.DS_Store
+
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# Coverage directory generated when running tests with coverage
+coverage
+
+# Dependencies
+node_modules/
+
+# Yarn files
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions
+
+# Node version directives
+.nvmrc
+
+# dotenv environment variables file
+.env
+.env.test
+
+# Build output
+dist
+dist-types
+
+# Temporary change files created by Vim
+*.swp
+
+# MkDocs build output
+site
+
+# Local configuration files
+*.local.yaml
+
+# Sensitive credentials
+*-credentials.yaml
+
+# vscode database functionality support files
+*.session.sql
+
+# E2E test reports
+e2e-test-report/

workspaces/install-dynamic-plugins/.prettierignore

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+dist
+dist-types
+coverage
+.vscode
+.eslintrc.js
+**/dist/install-dynamic-plugins.cjs

workspaces/install-dynamic-plugins/package.json

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+{
+  "name": "@internal/install-dynamic-plugins",
+  "version": "0.0.0",
+  "private": true,
+  "engines": {
+    "node": "22 || 24"
+  },
+  "workspaces": {
+    "packages": [
+      "packages/*"
+    ]
+  },
+  "scripts": {
+    "tsc": "tsc",
+    "tsc:full": "tsc --skipLibCheck true --incremental false",
+    "build:all": "backstage-cli repo build --all",
+    "build:api-reports": "yarn build:api-reports:only --tsc",
+    "build:api-reports:only": "backstage-repo-tools api-reports -o ae-wrong-input-file-type,ae-undocumented --validate-release-tags",
+    "build:knip-reports": "backstage-repo-tools knip-reports",
+    "clean": "backstage-cli repo clean",
+    "test": "backstage-cli repo test",
+    "test:all": "backstage-cli repo test --coverage",
+    "fix": "backstage-cli repo fix",
+    "lint": "backstage-cli repo lint --since origin/main",
+    "lint:all": "backstage-cli repo lint",
+    "prettier:check": "prettier --check .",
+    "prettier:fix": "prettier --write .",
+    "new": "backstage-cli new --scope @red-hat-developer-hub",
+    "postinstall": "cd ../../ && yarn install"
+  },
+  "prettier": "@spotify/prettier-config",
+  "lint-staged": {
+    "*.{js,jsx,ts,tsx,mjs,cjs}": [
+      "eslint --fix",
+      "prettier --write"
+    ],
+    "*.{json,md}": [
+      "prettier --write"
+    ]
+  },
+  "dependencies": {
+    "@backstage/cli": "^0.36.0",
+    "@backstage/cli-defaults": "0.1.0",
+    "@backstage/repo-tools": "^0.17.0",
+    "@changesets/cli": "^2.27.1",
+    "@jest/environment-jsdom-abstract": "^30.3.0",
+    "@spotify/prettier-config": "^15.0.0",
+    "jest": "^30.3.0",
+    "jsdom": "^27.1.0",
+    "prettier": "^3.4.2",
+    "typescript": "~5.8.0"
+  },
+  "packageManager": "yarn@4.12.0"
+}

workspaces/install-dynamic-plugins/packages/install-dynamic-plugins/.eslintrc.js

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+module.exports = require('@backstage/cli/config/eslint-factory')(__dirname);

workspaces/install-dynamic-plugins/packages/install-dynamic-plugins/.gitignore

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+node_modules/
+build/
+coverage/
+*.log
+.yarn/
+dist/

workspaces/install-dynamic-plugins/packages/install-dynamic-plugins/.prettierignore

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+node_modules/
+coverage/
+build/
+dist/
+package-lock.json

workspaces/install-dynamic-plugins/packages/install-dynamic-plugins/README.md

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+# cli-module-install-dynamic-plugins
+
+Backstage CLI module that downloads, extracts, and configures RHDH dynamic plugins listed in a `dynamic-plugins.yaml` file.
+
+This package replaces the previous Python implementation (`install-dynamic-plugins.py`) with a TypeScript/Node.js implementation. The runtime contract — input config, output `app-config.dynamic-plugins.yaml`, on-disk layout, hash-based change detection, lock file — is **unchanged**.
+
+The package has two invocation paths, both running the same `installer.ts` pipeline:
+
+- **`bin/install-dynamic-plugins` → fast-path** that loads `dist/installer.cjs.js` directly. Direct `npx install-dynamic-plugins` and any host that resolves the bin via `node_modules/.bin/...` hits this path — bypasses `@backstage/cli-node`'s `runCliModule` dispatch (~80 ms saved on cold start).
+- **`main: dist/index.cjs.js` → `createCliModule(...)`**, exposed for `backstage-cli` discovery. When a host project lists this package as a dependency, `backstage-cli install <dynamic-plugins-root>` is registered automatically.
+
+## Usage
+
+### Direct (bundled bin)
+
+```sh
+npx @red-hat-developer-hub/cli-module-install-dynamic-plugins ./dynamic-plugins-root
+```
+
+Or install globally:
+
+```sh
+npm install -g @red-hat-developer-hub/cli-module-install-dynamic-plugins
+install-dynamic-plugins ./dynamic-plugins-root
+```
+
+### Via `backstage-cli` discovery
+
+When the package is a dependency of a project that uses `backstage-cli`, the `install` command is registered automatically:
+
+```sh
+backstage-cli install ./dynamic-plugins-root
+```
+
+Runtime requirements: Node.js 22 or 24, and `skopeo` on `PATH` for OCI plugin support. `npm` is also expected on `PATH` for NPM-sourced plugins.
+
+## How RHDH consumes it
+
+The init container invokes the wrapper `install-dynamic-plugins.sh /dynamic-plugins-root`, which delegates to the bin installed via `yarn install` from this package (see [redhat-developer/rhdh#4908](https://github.com/redhat-developer/rhdh/pull/4908)). Node.js is already present in the runtime image (it runs the Backstage backend), and `skopeo` is installed for OCI inspection — no new system packages are required.
+
+## Architecture
+
+```
+src/
+├── index.ts              # createCliModule default export (backstage-cli discovery)
+├── command.ts            # loader for the `install` command (used by cli-module)
+├── installer.ts          # install pipeline + main() — the single source of truth
+├── log.ts                # uniform stdout logger
+├── errors.ts             # InstallException
+├── types.ts              # PluginSpec / Plugin / PluginMap / PullPolicy + constants
+├── util.ts               # shared helpers (fileExists, isInside, isPlainObject, tar filters)
+├── run.ts                # subprocess wrapper with structured errors
+├── concurrency.ts        # Semaphore + mapConcurrent + getWorkers()
+├── which.ts              # PATH lookup (no `which` dep)
+├── skopeo.ts             # Skopeo wrapper with promise-based inspect cache
+├── image-resolver.ts     # registry.access.redhat.com → quay.io fallback
+├── image-cache.ts        # OciImageCache — share OCI tarballs across plugins
+├── tar-extract.ts        # streaming OCI / NPM extraction with security checks
+├── npm-key.ts            # NPM package-spec parsing
+├── oci-key.ts            # OCI package-spec parsing + {{inherit}} + auto-path
+├── integrity.ts          # streaming SRI integrity verification
+├── merger.ts             # plugin merging + deep-merge with conflict detection
+├── plugin-hash.ts        # hash for change-detection ("already installed?")
+├── installer-oci.ts      # install one OCI plugin
+├── installer-npm.ts      # install one NPM (or local) plugin
+├── catalog-index.ts      # CATALOG_INDEX_IMAGE extraction
+└── lock-file.ts          # exclusive lock + SIGTERM cleanup
+```
+
+### Concurrency strategy (resource-conscious)
+
+OCI plugin downloads are parallelized via `mapConcurrent`. NPM `npm pack` calls stay sequential because the upstream npm registry throttles parallel fetches.
+
+The default worker count comes from `getWorkers()`:
+
+```
+Math.max(1, Math.min(Math.floor(availableParallelism() / 2), 6))
+```
+
+`availableParallelism()` honours cgroup CPU limits, so init containers in OpenShift won't try to use 16 workers on a 0.5 CPU pod. Override with `DYNAMIC_PLUGINS_WORKERS=<n>`.
+
+### Memory budget
+
+All tar extraction is streaming via `node-tar` — large layers never load into RAM. SHA verification streams chunks through `node:crypto`. A typical 10-plugin run sits around 20–80 MB peak RSS, comfortably below an init-container memory limit of 512 Mi.
+
+### Security checks (parity with the previous Python script)
+
+| Check                                                                 | Source                               |
+| --------------------------------------------------------------------- | ------------------------------------ |
+| Path-traversal in plugin path (`..`, absolute paths)                  | `tar-extract.ts`                     |
+| Per-entry size cap (zip bomb) — `MAX_ENTRY_SIZE`, default 20 MB       | `tar-extract.ts`, `catalog-index.ts` |
+| Symlink / hardlink target must stay inside destination                | `tar-extract.ts`                     |
+| Reject device files / FIFOs / unknown entry types                     | `tar-extract.ts`                     |
+| `package/` prefix enforced for NPM tarballs                           | `tar-extract.ts`                     |
+| SRI integrity verification (`sha256` / `sha384` / `sha512`)           | `integrity.ts`                       |
+| Registry fallback: `registry.access.redhat.com/rhdh` → `quay.io/rhdh` | `image-resolver.ts`                  |
+
+## Environment variables
+
+| Variable                          | Default              | Purpose                                                                                                |
+| --------------------------------- | -------------------- | ------------------------------------------------------------------------------------------------------ |
+| `MAX_ENTRY_SIZE`                  | `20000000`           | Per-entry byte limit when extracting tarballs                                                          |
+| `SKIP_INTEGRITY_CHECK`            | `false`              | When `true`, skip the SRI integrity check for remote NPM packages                                      |
+| `CATALOG_INDEX_IMAGE`             | _(unset)_            | OCI image to extract `dynamic-plugins.default.yaml` and catalog entities from                          |
+| `CATALOG_ENTITIES_EXTRACT_DIR`    | `$TMPDIR/extensions` | Where to extract `catalog-entities/` from the catalog-index image                                      |
+| `DYNAMIC_PLUGINS_WORKERS`         | `auto`               | Worker count override for parallel OCI downloads (`auto` uses `availableParallelism()/2`, capped at 6) |
+| `DYNAMIC_PLUGINS_LOCK_TIMEOUT_MS` | `600000` (10 min)    | Max time to wait for the lock file before aborting with an error                                       |
+
+## Development
+
+From the workspace root:
+
+```sh
+yarn install
+yarn tsc          # type-check
+yarn test         # Jest unit tests (166 tests)
+yarn workspace @red-hat-developer-hub/cli-module-install-dynamic-plugins build
+```
+
+`yarn build` runs `backstage-cli package build` and emits the unbundled `dist/*.cjs.js` + type declarations. The package is published as-is; no committed bundle.
+
+## Compatibility notes
+
+- The **input contract** matches the previous Python script exactly: same `dynamic-plugins.yaml` schema (`includes`, `plugins`, `package`, `pluginConfig`, `disabled`, `pullPolicy`, `forceDownload`, `integrity`).
+- The **output contract** matches: same `app-config.dynamic-plugins.yaml`, same plugin directory layout, same `dynamic-plugin-config.hash` / `dynamic-plugin-image.hash` files.
+- `{{inherit}}` semantics, OCI path auto-detection, registry fallback, integrity algorithms, lock-file behaviour are preserved.

workspaces/install-dynamic-plugins/packages/install-dynamic-plugins/bin/install-dynamic-plugins

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+#!/usr/bin/env node
+/*
+ * Copyright Red Hat, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const path = require('node:path');
+const fs = require('node:fs');
+
+/* eslint-disable-next-line no-restricted-syntax */
+const isLocal = fs.existsSync(path.resolve(__dirname, '../src'));
+
+if (isLocal) {
+  require('@backstage/cli-node/config/nodeTransform.cjs');
+}
+
+const { runCliModule } = require('@backstage/cli-node');
+const cliModule = require(isLocal ? '../src/index' : '..').default;
+const pkg = require('../package.json');
+
+runCliModule({ module: cliModule, name: pkg.name, version: pkg.version });

workspaces/install-dynamic-plugins/packages/install-dynamic-plugins/cli-report.md

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+## CLI Report file for "@red-hat-developer-hub/cli-module-install-dynamic-plugins"
+
+> Do not edit this file. It is a report generated by `yarn build:api-reports`
+
+### `install-dynamic-plugins`
+
+```
+Usage: @red-hat-developer-hub/cli-module-install-dynamic-plugins [options] [command]
+
+Options:
+  -V, --version
+  -h, --help
+
+Commands:
+  help [command]
+  install
+```
+
+### `install-dynamic-plugins install`
+
+```
+Usage: @red-hat-developer-hub/cli-module-install-dynamic-plugins install [flags...] <dynamic-plugins-root>
+
+Options:
+  -h, --help
+```