63 lines
1.4 KiB
TypeScript
63 lines
1.4 KiB
TypeScript
function read<
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const C extends readonly string[],
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D extends Partial<Record<C[number], any>> & Record<Exclude<keyof D, C[number]>, never> = {},
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>(variables: C, defaults: D): Record<C[number], any> {
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const missing: string[] = []
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const result: Record<string, any> = {}
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for (const variable of variables) {
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let value: string | number | boolean | null | undefined = process.env[variable] || defaults[variable as keyof D]
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if (value === undefined) {
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missing.push(variable)
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} else {
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if (typeof value === 'string') {
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if (/^\d+$/.test(value)) {
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value = Number(value)
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} else if (['false', 'true', 'null', 'undefined'].includes(value)) {
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// oxlint-disable-next-line no-eval
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value = eval(value)
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}
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}
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}
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result[variable] = value
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}
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if (missing.length) {
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throw new Error(`Missing required env variables: ${missing.join(', ')}`)
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}
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return result
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}
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export default read(
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[
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'DOMAIN',
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'PROTOCOL',
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'HOSTNAME',
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'PORT',
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'FASTIFY_PORT',
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'FASTIFY_HOST',
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'LOG_LEVEL',
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'LOG_STREAM',
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'MAILGUN_API_KEY',
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'NODE_ENV',
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'PGDATABASE',
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'PGHOST',
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'PGPASSWORD',
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'PGPORT',
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'PGUSER',
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'REDIS_HOST',
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'SESSION_SECRET',
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] as const,
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{
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MAILGUN_API_KEY: 'this is not a real key',
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PGPASSWORD: null,
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PGPORT: null,
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PGUSER: null,
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SESSION_SECRET: 'this is not very secret but it is long enough',
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},
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)
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