Build fails on 0.10.5: Cannot find module @babel/...

Current Behavior

$ tsdx build
Error: Cannot find module '@babel/plugin-transform-runtime' from '/path-to-pkgs/packages/auth'

    at Function.module.exports [as sync] (/path-to-pkgs/packages/auth/node_modules/resolve/lib/sync.js:74:15)
    at resolveStandardizedName (/path-to-pkgs/packages/auth/node_modules/@wessberg/rollup-plugin-ts/node_modules/@babel/core/lib/config/files/plugins.js:101:31)
    at resolvePlugin (/path-to-pkgs/packages/auth/node_modules/@wessberg/rollup-plugin-ts/node_modules/@babel/core/lib/config/files/plugins.js:54:10)
    at loadPlugin (/path-to-pkgs/packages/auth/node_modules/@wessberg/rollup-plugin-ts/node_modules/@babel/core/lib/config/files/plugins.js:62:20)
    at createDescriptor (/path-to-pkgs/packages/auth/node_modules/@wessberg/rollup-plugin-ts/node_modules/@babel/core/lib/config/config-descriptors.js:154:9)
    at /path-to-pkgs/packages/auth/node_modules/@wessberg/rollup-plugin-ts/node_modules/@babel/core/lib/config/config-descriptors.js:109:50
    at Array.map (<anonymous>)
    at createDescriptors (/path-to-pkgs/packages/auth/node_modules/@wessberg/rollup-plugin-ts/node_modules/@babel/core/lib/config/config-descriptors.js:109:29)
    at createPluginDescriptors (/path-to-pkgs/packages/auth/node_modules/@wessberg/rollup-plugin-ts/node_modules/@babel/core/lib/config/config-descriptors.js:105:10)
    at /path-to-pkgs/packages/auth/node_modules/@wessberg/rollup-plugin-ts/node_modules/@babel/core/lib/config/config-descriptors.js:63:49

error Command failed with exit code 1.

Expected behavior

Build working like in 0.9.3 😄

Suggested solution(s)

Additional context

Build works fine in 0.9.3 but upgrading tsdx to latest breaks, doing yarn add @babel/plugin-transform-runtime leads to the same error with another babel plugin (@babel/plugin-syntax-dynamic-import)

Guessing this issue is related: https://github.com/wessberg/rollup-plugin-ts/issues/37

Your environment

Software	Version(s)
TSDX	0.10.5
TypeScript	3.6.4
Browser	N/A
npm/Yarn	yarn 1.19.1
Node	node v12.10.0
Operating System	osx

[sw-yx]

we’ve rolled back the plugin change - open new issues for anything v0.11 and up

[wessberg]

@medelman17 I’ve written a lot of details in the README, particularly the FAQ, that you may find relevant here.

But basically, as far as I can tell from the source code, you’re running Babel twice. Tsdx uses babel through rollup-plugin-ts since you give it the transpiler: "babel" option and through babelPluginTsdx, another Rollup plugin.

I don’t know if that plugin is doing anything special, but if not, you might as well leave it out, given that rollup-plugin-ts is very batteries-included when it comes to Babel.

Now, you may be doing something special with that plugin that I don’t know, so it may not be as simple as that. I’m not intimate with the codebase of tsdx 🙂.

But in any case, there’s a lot of overlap in the value proposition of tsdx and rollup-plugin-ts in relation to juggling the relationship between Babel, Browserslists, and Typescript, which will lead to dependency errors at some point as long as both packages need to sync their Babel dependencies. Moving all babel-related dependencies to peerDependencies might be an option, but I’m hesitant to do that since that’s a lot of packages to ask the user to npm install (or whatever package manager you use, yarn, PNPM, what-have-you)