Update: Add /universal entrypoint (fixes #50)

[nzakas]

Adds a new /universal entrypoint that exports only members that are browser-safe. Once this is merged, we should change this line in linter.js from:

    const {
        Legacy: {
            ConfigOps,
            ConfigValidator,
            environments: BuiltInEnvironments
        }
    } = require("@eslint/eslintrc"),

to

const    {
        Legacy: {
            ConfigOps,
            ConfigValidator,
            environments: BuiltInEnvironments
        }
    } = require("@eslint/eslintrc/universal"),

[mdjermanovic]

Updated eslint/eslint#14865 to use this branch, but the Browser Test still doesn't work.

ERROR in ./node_modules/@eslint/eslintrc/dist/eslintrc-universal.cjs 8:15-32
Module not found: Error: Can't resolve 'module' in '/home/runner/work/eslint/eslint/node_modules/@eslint/eslintrc/dist'
 @ ./lib/linter/linter.js 23:4-41

webpack compiled with 1 error

I believe this is the cause:

eslintrc/lib/shared/ajv.js

Lines 12 to 15 in 3983fde

	import { createRequire } from "module";
	const require = createRequire(import.meta.url);
	const metaSchema = require("ajv/lib/refs/json-schema-draft-04.json");

(ajv.js is imported from config-validator.js).

We might need to copy the content of ajv/lib/refs/json-schema-draft-04.json into our own ESM module, and import that module here instead of loading JSON file.

[mdjermanovic]

Suggested change

	"dist"
	"dist/eslintrc.cjs",
	"dist/eslintrc-universal.cjs"

if we don't want to publish .map files

[nzakas]

I can't think of a reason not to publish map files.

[mdjermanovic]

I don't know, we are not publishing map files in other dual packages e.g., eslint/eslint-visitor-keys#24 (comment)

[nzakas]

Oops, good call. Updated.

[mdjermanovic]

LGTM, all checks have passed on eslint/eslint#14865.