Support for .env file?

[hbcondo]

Is it possible to load environment variables from a .env file? I tried dotenvy but no matter where the .env file is placed, I always receive the error:

.env file not found: Io(Custom { kind: NotFound, error: "path not found" })

[dream-dasher]

Hey there, I've never used rust-script, (just looking through issues to see if it talk about the cargo-script stabilization planned for 2024).

But, if a random stranger's guess is helpful:

rust-script(like cargo-script) is compiling and storing these files in some centralized location.
dotenvy is presumably looking in the locale of where the compiled code lives, rather than where you're running it.

A quick look at the two sites:

You can pass the path whre dotenvy should read from here: dotenvy.from_path

use std::path::Path;

dotenvy::from_path(Path::new("path/to/.env"))?;

I don't know which .env path you want (there are plausibly 3 - compile location, script location, run location -- and either of the last two are reasonable)

If you want some sense of the paths in play there's an environment variables section to the rust-script docs. That should help debug.
And then you can just feed the desired path into dotenvy. (pulling dynamically if you want the run path)

RUST_SCRIPT_BASE_PATH: the base path used by rust-script to resolve relative dependency paths. Note that this is not necessarily the same as either the working directory, or the directory in which the script is being compiled.
RUST_SCRIPT_PATH: absolute path to the script being run, assuming one exists. Set to the empty string for expressions.

um, like I said, I haven't used this crate -- just the nightly version cargo +nightly -Zscript <file.rs> <args/flags>
But maybe helps

[hbcondo]

@ethanmsl, thank you for taking the time to write out your thoughts on this topic based on your experience. I was using dotenvy's original API when I submitted this issue but with your link to the new API, I was able to get things working:

#!/usr/bin/env rust-script
//! ```cargo
//! [dependencies]
//! dotenvy = { version = "0.15.7" }
//! ```

use dotenvy;

let env_path = concat!(env!("RUST_SCRIPT_BASE_PATH"), "/.env");
let env_map = match dotenvy::from_path(env_path) {
  Ok(v) => println!(".env found"),
  Err(r) => println!(".env NOT found")
};

Closing issue 👍