feat(aws-lambda-nodejs): support additional esbuild configurations

[ryparker]

Summary

This PR adds support for passing in any additional esbuild args that are not already exposed in the NodejsFunction API.

With this change a user should be able to add an esbuild option such as --log-limit:

new NodejsFunction(scope, id, {
  ...
  bundling: {
    esbuildArgs: {
      "--log-limit": "0"
    }
  }
})

Resolves: #17768

---

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[gitpod-io]

[jogold]

Suggested change

	...this.props.esbuildArgs ? [Object.keys(this.props.esbuildArgs).map((key) => `${key}=${this.props.esbuildArgs![key]}`).join(' ')] : [],
	...this.props.esbuildArgs ? [Object.entries(this.props.esbuildArgs).map(([key, value]) => `${key}=${value}`).join(' ')] : [],

+ should value be enclosed with double quotes? ${key}="${value}" to cover args where value is a path that can contain whitespaces? or should the user take care of this?

[jogold]

Ah and what about args that don't have values like --keep-names?

[ryparker]

Good suggestions, I'll get those implemented. Thanks!

[ryparker]

Ah and what about args that don't have values like --keep-names?

@jogold because the type for esbuildArgs is an object we can always expect a value being assigned to each key. I think it's reasonable to assume that the user will need to pass a truthy value into the value of those boolean args.

i.g.

...
esbuildArgs: {
      '--log-limit': '0',
      '--resolve-extensions': '.ts,.js',
      '--splitting': true,
    },

I'll update the type to

readonly esbuildArgs?: { [key: string]: string | boolean };

I added an example of this to the README example and updated tests for clarification. LMK if you think this is acceptable.

[jogold]

But esbuild doesn't accept this syntax in the CLI...

> error: Invalid build flag: "--splitting=true"

You need to update the logic to treat the Booleans differently (output only the key)

[ryparker]

I'm not able to reproduce this error. See my tests below:

$ esbuild src/* --bundle --outdir=output/splitting-novalue --format=esm --splitting

  output/splitting-novalue/app.js             133.9kb
  output/splitting-novalue/chunk-BJ7SH3MN.js  131.7kb
  output/splitting-novalue/chunk-IZI55ZEC.js    447b 
  output/splitting-novalue/chunk-QND2VRQK.js    442b 
  output/splitting-novalue/GreenSpinner.js      138b 
  output/splitting-novalue/BlueSpinner.js       136b 
  output/splitting-novalue/Spinner.js            98b 

$ esbuild src/* --bundle --outdir=output/splitting-withvalue-true --format=esm --splitting=true

  output/splitting-withvalue-true/app.js             133.9kb
  output/splitting-withvalue-true/chunk-BJ7SH3MN.js  131.7kb
  output/splitting-withvalue-true/chunk-IZI55ZEC.js    447b 
  output/splitting-withvalue-true/chunk-QND2VRQK.js    442b 
  output/splitting-withvalue-true/GreenSpinner.js      138b 
  output/splitting-withvalue-true/BlueSpinner.js       136b 
  output/splitting-withvalue-true/Spinner.js            98b 

$ esbuild src/* --bundle --outdir=output/splitting-withvalue-false --format=esm --splitting=false

  output/splitting-withvalue-false/app.js           266.0kb
  output/splitting-withvalue-false/GreenSpinner.js  132.0kb
  output/splitting-withvalue-false/BlueSpinner.js   132.0kb
  output/splitting-withvalue-false/Spinner.js       131.7kb

$ esbuild src/* --bundle --outdir=output/splitting-withvalue-wrapped-true --format=esm --splitting="true"

  output/splitting-withvalue-wrapped-true/app.js             133.9kb
  output/splitting-withvalue-wrapped-true/chunk-BJ7SH3MN.js  131.7kb
  output/splitting-withvalue-wrapped-true/chunk-IZI55ZEC.js    447b 
  output/splitting-withvalue-wrapped-true/chunk-QND2VRQK.js    442b 
  output/splitting-withvalue-wrapped-true/GreenSpinner.js      138b 
  output/splitting-withvalue-wrapped-true/BlueSpinner.js       136b 
  output/splitting-withvalue-wrapped-true/Spinner.js            98b 

$ esbuild src/* --bundle --outdir=output/splitting-withvalue-wrapped-false --format=esm --splitting="false"

  output/splitting-withvalue-wrapped-false/app.js           266.0kb
  output/splitting-withvalue-wrapped-false/GreenSpinner.js  132.0kb
  output/splitting-withvalue-wrapped-false/BlueSpinner.js   132.0kb
  output/splitting-withvalue-wrapped-false/Spinner.js       131.7kb

✨  Done in 1.04s.

Could you share the command you're using to get that "Invalid build flag" error?

[jogold]

OK it works with esbuild >= 0.14.24 published 8 days ago.

You can try with npx esbuild@0.14.23 ....

[jogold]

I suggest this #19343

[alimek]

@nija-at any chance to review this PR?

[aws-cdk-automation]

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