Support custom configuration file

[Ailrun]

Do you want to request a feature or report a bug?
Request a feature

What is the current behavior?
Read the package.json

If this is a feature request, what is motivation or use case for changing the behavior?
I want to separate configs into specific directory.

Please mention other relevant information.

• node version: 9.11.1
• npm version: 6.0.0
• Operating system: Manjaro
• bundlesize version: 0.17.0
• CI you are using: TravisCI

[trevordmiller]

Agreed. It would be nice to have a .bundlesizerc.json file option for those who like to keep config out of package.json and npm scripts (following other tools: .babelrc, .eslintrc.json, .lintstagedrc.json, .prettierrc.json, now.json, etc.).

Thanks for the great tool!

[ghost]

Would love this feature too. I'm currently working on a project that makes heavy use of code splitting and produces about 10 different chunks at build time. I've set up bundlesize to check each chunk against a specific limit, with different compressions, which is great.

The downside is that my package.json is now twice as big due to this. It would be fantastic to be able to call bundlesize -c ./path/to/.bundlesizerc or similar.

[trevordmiller]

For example, right now I have an npm script that looks like this:

"size": "bundlesize -f './.next/main.js' -s 150kB"

It would be nice if I could move all the config to a .bundlesizerc.json configuration file like the package.json bundlesize options:

[
  {
    "path": "./.next/main.js",
    "maxSize": "150kB"
  }
]

Then the npm script could simply be:

"size": "bundlesize"

[Aghassi]

Adding this should be very straight forward. https://github.com/davidtheclark/cosmiconfig can be added as a dependency, and it takes very few lines of code. @siddharthkp, I can take this on unless there is any objection to using this package.

[trevordmiller]

That would be awesome. cosmiconfig is what many other tools use. Prettier, for example: https://prettier.io/docs/en/configuration.html

[ssulivan11]

Have a custom config setting in this PR:
#212

In our monorepo we maintianed hundreds of individual bundles and the package.json got ugly 😊

[siddharthkp]

Implemented in #316 and published in 0.18.0 🎉

Check out README for details