Parcel depends on undeclared dependency `babel-types`

🐛 bug report

Parcel has a runtime dependency on babel-types, but this dependency is not declared in parcel’s package.json. With certain workflows (I am using Rush with PNPM), this causes parcel build to fail at runtime.

🎛 Configuration (.babelrc, package.json, cli command)

The config below is for my real-world project. For a minimal repro, see https://github.com/mpiroc/rush-repro.

.babelrc

I do not have a .babelrc.

package.json

Root of monorepo:

{
  "name": "my-package-name",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "build": "rush build",
    "test": "rush test"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {},
  "dependencies": {}
}

Specific package:

{
  "name": "@mpiroc/my-package",
  "version": "0.0.0",
  "description": "> TODO: description",
  "author": "Matthew Pirocchi <[e-mail]>",
  "homepage": "https://github.com/mpiroc/my-repo#readme",
  "license": "ISC",
  "main": "lib/index.ts",
  "directories": {
    "lib": "lib",
    "test": "__tests__"
  },
  "files": [
    "lib"
  ],
  "publishConfig": {
    "access": "private"
  },
  "repository": {
    "type": "git",
    "url": "git+https://github.com/mpiroc/my-repo.git"
  },
  "bugs": {
    "url": "https://github.com/mpiroc/my-repo/issues"
  },
  "scripts": {
    "build": "tsc",
    "watch": "tsc -w",
    "test": "jest",
    "lint": "eslint --ext .ts .",
    "bundle": "parcel build lib/index.ts --no-source-maps --target node --bundle-node-modules --no-minify"
  },
  "jest": {
    "preset": "ts-jest",
    "globals": {
      "ts-jest": {
        "packageJson": "package.json"
      }
    },
    "testEnvironment": "node",
    "testMatch": [
      "**/__tests__/**/*.(spec|test).ts?(x)",
      "**/?(*.)+(spec|test).ts?(x)"
    ]
  },
  "dependencies": {
    "@mpiroc/my-internal-dep-1": "0.0.0",
    "@mpiroc/my-internal-dep-2": "0.0.0"
  },
  "devDependencies": {
    "@types/jest": "^24.0.18",
    "@types/node": "^10.14.20",
    "@typescript-eslint/eslint-plugin": "^2.3.2",
    "@typescript-eslint/eslint-plugin-tslint": "^2.3.2",
    "@typescript-eslint/parser": "^2.3.2",
    "@typescript-eslint/typescript-estree": "^2.3.2",
    "eslint": "^6.5.0",
    "eslint-config-standard": "^14.1.0",
    "eslint-plugin-import": "^2.18.2",
    "eslint-plugin-node": "^10.0.0",
    "eslint-plugin-promise": "^4.2.1",
    "eslint-plugin-standard": "^4.0.1",
    "jest": "^24.9.0",
    "parcel-bundler": "^1.12.4",
    "ts-jest": "^24.1.0",
    "tslint": "^5.20.0",
    "typescript": "^3.6.3",
    "typescript-tslint-plugin": "^0.5.4"
  }
}

CLI Command

`npm run bundle`

# Which in turn runs:
parcel build lib/index.ts --no-source-maps --target node --bundle-node-modules --no-minify

Other

Because Rush uses PNPM under the hood, I’ve added the following workaround for https://github.com/parcel-bundler/parcel/issues/1125 (in .npmrc):

# Workaround for https://github.com/parcel-bundler/parcel/issues/1125.
# TODO: Remove once parcel#1125 is fixed.
shamefully-flatten=true

🤔 Expected Behavior

parcel build completes successfully.

😯 Current Behavior

parcel build fails due to module not found: babel-types

💁 Possible Solution

The real solution is to either add babel-types to parcel’s dependencies, or remove the runtime dependency on babel-types.

In the meantime, the workaround is to use pnpm’s readPackage hook to fill in the missing dependency:

// In `pnpmfile.js`, function `readPackage`
if (packageJson.name === 'parcel-bundler') {
  packageJson.dependencies['babel-types'] = '^6.26.0'
  context.log('Added missing dependency (babel-types) to parcel-bundler')
}

🔦 Context

I am attempting to use Parcel to bundle some packages (which will be deployed to AWS Lambda) in my Rush-based monorepo.

💻 Code Sample

See https://github.com/microsoft/rushstack/issues/1578 for a full minimal repro. You can find the repro project here: https://github.com/mpiroc/rush-repro

🌍 Your Environment

Software	Version(s)
Parcel	"parcel-bundler": "^1.12.4"
Node	10.16.3 (also tested on non-LTS 12.6.0)
npm/Yarn	"pnpmVersion": "2.15.1"
Operating System	Windows 10 version 1903 build 18362.356

[DeMoorJasper]

Yarn v2 isn’t supported by parcel at the monent there’s an open PR for it

_{Sent with GitHawk}

[a-type]

Adding babel-types to the dependencies with yarn v2 didn’t work for me. Are there any other workarounds?