@selfage/env_var_getter
Version:
Get optional/required variable from process.env.
52 lines • 4.8 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.EnvVar = void 0;
exports.getEnvVar = getEnvVar;
let GLOBAL_NAMES = new Set();
class EnvVar {
constructor(name, value) {
this.name = name;
this.value = value;
}
required() {
if (this.value == null) {
throw new Error(`Env variable ${this.name} is required but not provided.`);
}
return this;
}
asString() {
return this.value;
}
asNumber() {
if (this.value == null) {
return undefined;
}
let value = Number(this.value);
if (isNaN(value)) {
throw new Error(`Env variable ${this.name} is not a number`);
}
return value;
}
asBoolean() {
if (this.value == null) {
return undefined;
}
if (this.value === 'true') {
return true;
}
else if (this.value === 'false') {
return false;
}
else {
throw new Error(`Env variable ${this.name}'s value needs to be either true or false.`);
}
}
}
exports.EnvVar = EnvVar;
function getEnvVar(name) {
if (GLOBAL_NAMES.has(name)) {
throw new Error(`Env variable ${name} has already been defined.`);
}
return new EnvVar(name, process.env[name]);
}
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