Function env_file_reader::read_files

pub fn read_files<P: AsRef<Path>>(
    paths: &[P]
) -> Result<HashMap<String, String>, Error>

Parses multiple environment files at the specified paths and constructs a single HashMap with the merged environment variables from the files.

This is a vectorized version of read_file, where a single output is constructed from calling read_file for each file provided as an argument to this function. The order in which the paths are defined is maintained, so if an environment file with a higher index exposes the same environment variable as a file with a lower index, the value of the file with the higher index is exposed by the returned HashMap.

Returns an error if reading one file was unsuccessful or if one file is ill-formatted. Read the crate’s documentation for information about the format that env-file-reader supports.

Example:

examples/.env:

CLIENT_ID=YOUR_CLIENT_ID
CLIENT_SECRET=YOUR_CLIENT_SECRET

examples/.env.utf8:

🦄=💖
💖=🦄

use env_file_reader::read_files;

fn main() -> std::io::Result<()> {
  let env_variables = read_files(&[
    "examples/.env",
    "examples/.env.utf8",
  ])?;

  assert_eq!(&env_variables["CLIENT_ID"], "YOUR_CLIENT_ID");
  assert_eq!(&env_variables["CLIENT_SECRET"], "YOUR_CLIENT_SECRET");
  assert_eq!(&env_variables["🦄"], "💖");
  assert_eq!(&env_variables["💖"], "🦄");

  Ok(())
}