TypeError: Deno.readFileSync is not a function

[Boris Diakur]

Getting this on deno deploy when loading config:

TypeError: Deno.readFileSync is not a function
    at parseFile (https://deno.land/x/dotenv@v3.2.0/mod.ts:103:59)
    at config (https://deno.land/x/dotenv@v3.2.0/mod.ts:42:18)

No issues when running locally.

The cause of this issue might be that

only stable APIs of Deno are made available in Deploy.

and Deno.readFileSync is not (yet) part of the stable API.
See https://deno.com/deploy/docs/runtime-api#deno-apis

This should be fixable by replacing Deno.readFileSync with await Deno.readFile and making the consuming method async.

[Boris Diakur]

Just realised that I can use https://deno.land/std/dotenv 😅

[Fabian Hagen]

Sorry for reopening this ticket, but I run in the same error during deployment using Deno deploy:

This is my mongo.ts:

import {MongoClient} from "./deps.ts";
import {config} from "./deps.ts";

const env = await config()
console.log("ENV", env);

const client = new MongoClient();
await client.connect("mongodb://" + env.MONGO_USER + ":" + env.MONGO_PW + "@" + env.MONGO_HOST + ":" + env.MONGO_PORT + "/?authSource=admin&readPreference=primary&ssl=false&directConnection=true");
const db = client.database("deno");

export {db};

And my deps.ts:

export {
    MongoClient,
    ObjectId
} from "https://deno.land/x/mongo@v0.31.1/mod.ts";

export {
    Router,
    Status
} from "https://deno.land/x/oak/mod.ts";

export {
    config
} from "https://deno.land/x/dotenv/mod.ts";

[AntonioFCG]

Sorry for reopening this ticket, but I run in the same error during deployment using Deno deploy:

This is my mongo.ts:

import {MongoClient} from "./deps.ts";
import {config} from "./deps.ts";

const env = await config()
console.log("ENV", env);

const client = new MongoClient();
await client.connect("mongodb://" + env.MONGO_USER + ":" + env.MONGO_PW + "@" + env.MONGO_HOST + ":" + env.MONGO_PORT + "/?authSource=admin&readPreference=primary&ssl=false&directConnection=true");
const db = client.database("deno");

export {db};

And my deps.ts:

export {
    MongoClient,
    ObjectId
} from "https://deno.land/x/mongo@v0.31.1/mod.ts";

export {
    Router,
    Status
} from "https://deno.land/x/oak/mod.ts";

export {
    config
} from "https://deno.land/x/dotenv/mod.ts";

You are importing the synchronous function, try using the asynchronous one.
import { configAsync } from "https://deno.land/x/dotenv/mod.ts";
instead of
import { config } from "https://deno.land/x/dotenv/mod.ts";