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configuration.ts
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configuration.ts
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import { cosmiconfig } from 'cosmiconfig';
import TypeScriptLoader from 'cosmiconfig-typescript-loader';
import { DEFAULT_CONFIGURATION } from '../constants/configuration';
import type { IConfiguration } from '../interfaces/configuration';
import { validateConfiguration, validateEnvConfiguration } from '../validators/configuration';
import { CONFIGURATION_MODULE_NAME, SEARCH_PLACES } from '../constants/cosmiconfig';
/**
* The function sets a default configuration to work with,
* and tries reading user's configuration file and environment variables
* @returns The final configuration
*/
export const getConfiguration = async () => {
let finalConfiguration: IConfiguration = DEFAULT_CONFIGURATION;
const explorer = cosmiconfig(CONFIGURATION_MODULE_NAME, {
searchPlaces: SEARCH_PLACES,
loaders: {
'.ts': TypeScriptLoader(),
},
});
try {
const result = await explorer.search();
let configurationFromFile: Partial<IConfiguration>;
if (!result || result.isEmpty || typeof result.config !== 'object') {
configurationFromFile = {};
} else {
configurationFromFile = validateConfiguration(result.config);
}
finalConfiguration = {
...finalConfiguration,
...configurationFromFile,
};
} catch {}
const configurationFromENVs = validateEnvConfiguration();
finalConfiguration = {
...finalConfiguration,
...configurationFromENVs,
};
return finalConfiguration;
};