cargo-make 0.37.24

Rust task runner and build tool.
Documentation 
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//! # trim_func
//!
//! Takes an environment variable name and returns its value trimmed.
//! The value will be removed if empty.
//!

use crate::error::CargoMakeError;

#[cfg(test)]
#[path = "trim_func_test.rs"]
mod trim_func_test;

pub(crate) fn invoke(function_args: &Vec<String>) -> Result<Vec<String>, CargoMakeError> {
    if function_args.len() > 2 {
        return Err(CargoMakeError::Arity("trim expects up to 2 arguments (environment variable name and optionally start/end trim flag)"));
    }

    let env_key = function_args[0].clone();

    let value = envmnt::get_or(&env_key, "");

    let trimmed_value = if function_args.len() == 1 {
        value.trim().to_string()
    } else {
        let trim_type = function_args[1].clone();

        match trim_type.as_ref() {
            "start" => value.trim_start().to_string(),
            "end" => value.trim_end().to_string(),
            _ => {
                error!("Invalid trim type provided, only start or end are supported.");
                return Err(CargoMakeError::MethodCallRestriction(
                    "Invalid trim type provided, only start or end are supported.",
                ));
            }
        }
    };

    if trimmed_value.len() > 0 {
        Ok(vec![trimmed_value])
    } else {
        Ok(vec![])
    }
}