wasmenv 0.2.1

wasmenv - a version manager for wasm runtimes
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use std::{env, path::PathBuf};

use anyhow::anyhow;

use crate::utils::wasmenv_config_dir;

pub fn shell(name: Option<String>) -> anyhow::Result<()> {
    let env_shell = env::var("SHELL").unwrap();
    let shell_path = match name {
        Some(ref shell) => shell,
        None => &env_shell,
    };
    let shell_name = PathBuf::from(shell_path)
        .file_name()
        .and_then(|os_str| os_str.to_str())
        .ok_or(anyhow!("Invalid shell name"))?
        .to_owned();
    let wasmenv_dir = wasmenv_config_dir()?;
    let wasmenv_dir = wasmenv_dir.to_str().unwrap();
    let shell_code = match shell_name.as_str() {
        "bash" | "zsh" => format!(
            r#"
# {shell_name} config for wasmenv
# copy this to ~/.{shell_name}rc
export WASMENV_DIR="{0}"
[ -s "{0}/wasmenv.sh" ] && source "{0}/wasmenv.sh"
"#,
            wasmenv_dir
        ),
        "fish" => format!(
            r#"
# {shell_name} config for wasmenv
# Copy this to ~/.config/fish/config.fish
set -x WASMER_DIR "{0}"
set -x PATH $WASMER_DIR/bin $PATH
"#,
            wasmenv_dir
        ),
        _ => {
            return Err(anyhow!(format!(
                "Shell `{}` not recognized. Try one of `bash`, `zsh` or `fish`",
                shell_name
            )));
        }
    };
    println!("{}", shell_code);
    // let mut stdout = stdout();
    // stdout.write_all(shell_code.as_bytes())?;
    Ok(())
}