gitignore-template-generator 0.14.2

A binary crate to generate templates for .gitignore files
Documentation 
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use crate::constant;

pub struct EnvTestContext {
    original_value: Option<String>,
}

impl Drop for EnvTestContext {
    fn drop(&mut self) {
        if self.original_value.is_none() {
            println!(
                "{} env var wasn't set. Removing it...",
                constant::template_manager::HOME_ENV_VAR
            );
            remove_env_var(constant::template_manager::HOME_ENV_VAR);
            println!("Removed!");
        } else {
            println!(
                "{} env var was set to {:?}. Resetting it...",
                constant::template_manager::HOME_ENV_VAR,
                self.original_value
            );
            set_env_var(
                constant::template_manager::HOME_ENV_VAR,
                self.original_value.as_mut().unwrap(),
            );
            println!("Reset!");
        }

        println!("Test context dropped");
    }
}

pub fn create_env_test_context() -> EnvTestContext {
    let ctx = match std::env::var(constant::template_manager::HOME_ENV_VAR) {
        Ok(result) => EnvTestContext {
            original_value: Some(result),
        },
        Err(_) => EnvTestContext {
            original_value: None,
        },
    };

    println!("Test context created");

    if ctx.original_value.is_some() {
        println!(
            "{} env var is set. Removing it...",
            constant::template_manager::HOME_ENV_VAR
        );
        remove_env_var(constant::template_manager::HOME_ENV_VAR);
        println!("Removed!");
    }

    ctx
}

pub fn remove_env_var<T: AsRef<std::ffi::OsStr>>(name: T) {
    unsafe {
        std::env::remove_var(name);
    }
}

pub fn set_env_var<T: AsRef<std::ffi::OsStr>, V: AsRef<std::ffi::OsStr>>(
    name: T,
    value: V,
) {
    unsafe {
        std::env::set_var(name, value);
    }
}