83 lines
2.1 KiB
TypeScript
83 lines
2.1 KiB
TypeScript
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import { readFile } from 'fs';
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import { DEFAULT_SAFE_SCHEMA, safeLoad, Schema } from 'js-yaml';
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import { isNil, isString } from 'lodash';
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import { join } from 'path';
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import { promisify } from 'util';
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import { envType } from 'src/config/type/Env';
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import { includeSchema, includeType } from 'src/config/type/Include';
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import { regexpType } from 'src/config/type/Regexp';
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import { NotFoundError } from 'src/error/NotFoundError';
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export const CONFIG_ENV = 'ISOLEX_HOME';
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export const CONFIG_SCHEMA = Schema.create([DEFAULT_SAFE_SCHEMA], [
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envType,
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includeType,
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regexpType,
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]);
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includeSchema.schema = CONFIG_SCHEMA;
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const readFileSync = promisify(readFile);
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/**
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* With the given name, generate all potential config paths in their complete, absolute form.
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*
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* This will include the value of `ISOLEX_HOME`, `HOME`, the current working directory, and any extra paths
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* passed as the final arguments.
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*/
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export function completePaths(name: string, extras: Array<string>): Array<string> {
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const paths = [];
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const env = process.env[CONFIG_ENV];
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if (isString(env)) {
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paths.push(join(env, name));
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}
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const home = process.env.HOME;
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if (isString(home)) {
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paths.push(join(home, name));
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}
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if (isString(__dirname)) {
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paths.push(join(__dirname, name));
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}
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for (const e of extras) {
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paths.push(join(e, name));
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}
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return paths;
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}
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export async function loadConfig(name: string, ...extras: Array<string>): Promise<any> {
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const paths = completePaths(name, extras);
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for (const p of paths) {
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const data = await readConfig(p);
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if (!isNil(data)) {
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return safeLoad(data, {
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schema: CONFIG_SCHEMA,
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});
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}
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}
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throw new NotFoundError('unable to load config');
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}
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export async function readConfig(path: string): Promise<string | undefined> {
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try {
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// need to await this read to catch the error, need to catch the error to check the code
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// tslint:disable-next-line:prefer-immediate-return
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const data = await readFileSync(path, {
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encoding: 'utf-8',
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});
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return data;
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} catch (err) {
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if (err.code === 'ENOENT') {
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return;
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}
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throw err;
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}
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}
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