/
ts-resolve.ts
101 lines (84 loc) · 2.46 KB
/
ts-resolve.ts
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import fs from 'fs'
import path from 'path'
import { PluginImpl } from 'rollup'
import _resolve from 'resolve'
import createDebug from 'debug'
import { builtinModules } from 'module'
const debug = createDebug('tsup:ts-resolve')
const resolveModule = (
id: string,
opts: _resolve.AsyncOpts
): Promise<string | null> =>
new Promise((resolve, reject) => {
_resolve(id, opts, (err, res) => {
if (err) return reject(err)
resolve(res || null)
})
})
export type TsResolveOptions = {
resolveOnly?: Array<string | RegExp>
ignore?: (source: string, importer?: string) => boolean
}
export const tsResolvePlugin: PluginImpl<TsResolveOptions> = ({
resolveOnly,
ignore,
} = {}) => {
const resolveExtensions = ['.d.ts', '.ts']
return {
name: `ts-resolve`,
async resolveId(source, importer) {
debug('resolveId source: %s', source)
debug('resolveId importer: %s ', importer)
// ignore IDs with null character, these belong to other plugins
if (/\0/.test(source)) return null
if (builtinModules.includes(source)) return false
if (ignore && ignore(source, importer)) {
debug('ignored %s', source)
return null
}
if (resolveOnly) {
const shouldResolve = resolveOnly.some((v) => {
if (typeof v === 'string') return v === source
return v.test(source)
})
if (!shouldResolve) return null
}
// Skip absolute path
if (path.isAbsolute(source)) return null
const basedir = importer
? await fs.promises.realpath(path.dirname(importer))
: process.cwd()
// A relative path
if (source[0] === '.') {
return resolveModule(source, {
basedir,
extensions: resolveExtensions,
})
}
let id: string | null = null
// Try resolving as relative path if `importer` is not present
if (!importer) {
id = await resolveModule(`./${source}`, {
basedir,
extensions: resolveExtensions,
})
}
// Try resolving in node_modules
if (!id) {
id = await resolveModule(source, {
basedir,
extensions: resolveExtensions,
packageFilter(pkg) {
pkg.main = pkg.types || pkg.typings
return pkg
},
paths: ['node_modules', 'node_modules/@types'],
})
}
if (id) {
debug('resolved %s to %s', source, id)
}
return id
},
}
}