glenvy/env

Strongly-typed access to environment variables.

Types

An error that occurred while reading an environment variable.

pub type Error {
  NotFound(name: String)
  FailedToParse(name: String)
}

```
NotFound(name: String)
```
The environment variable with the given name was not found.
```
FailedToParse(name: String)
```
The environment variable with the given name failed to parse.

</>

pub fn all() -> Dict(String, String)

Returns all of the available environment variables for the current process.

</>

pub fn bool(name: String) -> Result(Bool, Error)

Returns the value for the environment variable with the given name as a Bool.

The following values are parsed as True:

The following values are parsed as False:

The parsing is case-insensitive.

Returns Error(FailedToParse) if the environment variable cannot be parsed as a Bool.

Use get if you want to provide your own parser.

</>

pub fn float(name: String) -> Result(Float, Error)

Returns the value for the environment variable with the given name as a Float.

Returns Error(FailedToParse) if the environment variable cannot be parsed as a Float.

</>

pub fn int(name: String) -> Result(Int, Error)

Returns the value for the environment variable with the given name as an Int.

Returns Error(FailedToParse) if the environment variable cannot be parsed as an Int.

</>

pub fn parse(
  name: String,
  parser parse: fn(String) -> Result(a, b),
) -> Result(a, Error)

Returns the value for the environment variable with the given name.

Uses the provided parser to parse the value.

Returns Error(FailedToParse) if the provided parser returns an error.

</>

pub fn string(name: String) -> Result(String, Error)

Returns the value for the environment variable with the given name as a String.