49 lines
1.6 KiB
TypeScript
49 lines
1.6 KiB
TypeScript
import path from "path";
|
|
|
|
import { convertCamelToUpperSnakeCase, readJsonIfExists } from "./utils";
|
|
|
|
export default <T>(opts: Partial<T>, envKey: string, filePath = "") => {
|
|
const { env } = process,
|
|
defPath = filePath || path.join(process.cwd() ?? ".", "defaults.json5"),
|
|
def = readJsonIfExists(defPath),
|
|
// gets value from ENV || options || defaults (in that order)
|
|
getVal = (envName: keyof T) => {
|
|
const snakeEnvName = `${envKey}_${convertCamelToUpperSnakeCase(
|
|
envName as string
|
|
)}`;
|
|
if (env[snakeEnvName]) return env[snakeEnvName];
|
|
if (opts[envName]) return opts[envName];
|
|
return def[envName];
|
|
},
|
|
// gets array from ENV || options || defaults (in that order)
|
|
getArray = (envName: keyof T, optName: keyof T | "" = "") => {
|
|
let newEnvName;
|
|
if (optName === "") {
|
|
optName = envName;
|
|
newEnvName = convertCamelToUpperSnakeCase(envName as string);
|
|
}
|
|
newEnvName = `${envKey}_${String(envName)}`;
|
|
if (env[newEnvName])
|
|
return env?.[newEnvName as keyof typeof env]?.split(path.delimiter);
|
|
if (Array.isArray(opts[optName]) && (opts[optName] as []).length)
|
|
return opts[optName];
|
|
return def[optName];
|
|
};
|
|
|
|
const retVal = {
|
|
...Object.keys(def).reduce((acc: Partial<typeof def>, curr) => {
|
|
if (Array.isArray(def[curr])) acc[curr] = getArray(curr as keyof T);
|
|
else acc[curr] = getVal(curr as keyof T);
|
|
return acc;
|
|
}, {}),
|
|
};
|
|
|
|
return {
|
|
...Object.keys(def).reduce((acc: Partial<typeof def>, curr) => {
|
|
if (Array.isArray(def[curr])) acc[curr] = getArray(curr as keyof T);
|
|
else acc[curr] = getVal(curr as keyof T);
|
|
return acc;
|
|
}, {}),
|
|
};
|
|
};
|