config.mjs

import { createReadStream } from 'node:fs'
import { writeFile } from 'node:fs/promises'
import { normalize, join } from 'node:path'
import { homedir } from 'node:os'
import {
    REGISTRIES,
    getRegistryFromStream,
    setRegistryFromStream,
} from './registry.mjs'
import { isFile } from './utils.mjs'
import { readNrmrc } from './nrmrc.mjs'

/**
 * Set current registry
 * @param {boolean|undefined} local
 * @param {string} registryUrl
 */
export async function setRegistry(local, registryUrl) {
    const filePath = await getConfigPath(local)
    try {
        const fileStream = createReadStream(filePath)
        const result = await setRegistryFromStream(fileStream, registryUrl)
        return writeFile(filePath, result)
    } catch {
        return writeFile(filePath, `registry=${registryUrl}`)
    }
}

/**
 * Get current registry
 * @param {boolean=} local
 */
export async function getRegistry(local) {
    const filePath = await getConfigPath(local)
    try {
        const fileStream = createReadStream(filePath) // the file may not exists
        return (await getRegistryFromStream(fileStream)) || REGISTRIES['npm']
    } catch {
        // when rc file not found, fallback registry to default
        return REGISTRIES['npm']
    }
}

/**
 * If `local` is not provided, check if local npmrc file exists
 * @param {boolean=} local
 * @noexcept
 */
export async function getConfigPath(local) {
    const rc = '.npmrc'
    const detectLocal = typeof local !== 'boolean' && (await isFile(rc))
    if (local || detectLocal) {
        return rc
    }
    return join(normalize(homedir()), rc).replace(/\\/g, '/')
}

/**
 * Returns Map to keep order
 */
export async function getAllRegistries() {
    const all = new Map(Object.entries(REGISTRIES))
    for (const [k, v] of await readNrmrc().catch(() => [])) all.set(k, v)
    return all
}