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env.ts
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env.ts
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const envVars = new Map<string, string>();
export function setEnv(name: string, value: string) {
// Deno Deploy doesn't support permissions.requestSync
// https://github.com/denoland/deploy_feedback/issues/527
if (Deno.permissions.querySync?.({ name: "env" }).state === "granted") {
Deno.env.set(name, value);
} else {
envVars.set(name, value);
}
}
export function env<T>(name: string): T | undefined {
if (envVars.has(name)) {
return envVars.get(name) as T;
}
// Deno Deploy doesn't support permissions.requestSync
// https://github.com/denoland/deploy_feedback/issues/527
const allowed = !Deno.permissions.requestSync ||
Deno.permissions.requestSync({ name: "env" }).state === "granted";
if (!allowed) {
return undefined;
}
const value = envVars.has(name) ? envVars.get(name) : Deno.env.get(name);
if (typeof value === "undefined") {
return undefined;
}
switch (value.toLowerCase()) {
case "true":
case "on":
case "1":
return true as T;
case "false":
case "off":
case "0":
return false as T;
default:
return value as T;
}
}