ressa 0.8.2

An ECMAscript parser
Documentation 
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#![allow(unused)]
use std::{fs::read_to_string, io::Error};

#[derive(Clone, Copy, Debug)]
pub enum Lib {
    Jquery,
    Angular,
    React,
    ReactDom,
    Vue,
    Moment,
    Dexie,
    Everything(EverythingVersion),
}
#[derive(Clone, Copy, Debug)]
pub enum EverythingVersion {
    Es5,
    Es2015Module,
    Es2015Script,
}

impl EverythingVersion {
    fn file_name(&self) -> &str {
        match self {
            EverythingVersion::Es5 => "es5.js",
            EverythingVersion::Es2015Script => "es2015-script.js",
            EverythingVersion::Es2015Module => "es2015-module.js",
        }
    }
}

impl Lib {
    pub fn path(&self) -> String {
        match self {
            Lib::Jquery => "node_modules/jquery/dist/jquery.js".into(),
            Lib::Angular => "node_modules/angular/angular.js".into(),
            Lib::React => "node_modules/react/umd/react.development.js".into(),
            Lib::ReactDom => "node_modules/react-dom/umd/react-dom.development.js".into(),
            Lib::Vue => "node_modules/vue/dist/vue.js".into(),
            Lib::Moment => "node_modules/moment/moment.js".into(),
            Lib::Dexie => "node_modules/dexie/dist/dexie.js".into(),
            Lib::Everything(kind) => format!("node_modules/everything.js/{}", kind.file_name()),
        }
    }

    pub fn min_path(&self) -> Option<String> {
        match self {
            Lib::Jquery => Some("node_modules/jquery/dist/jquery.min.js".into()),
            Lib::Angular => Some("node_modules/angular/angular.min.js".into()),
            Lib::React => Some("node_modules/react/umd/react.production.min.js".into()),
            Lib::ReactDom => Some("node_modules/react-dom/umd/react-dom.production.min.js".into()),
            Lib::Vue => Some("node_modules/vue/dist/vue.js".into()),
            Lib::Moment => Some("node_modules/moment/min/moment.min.js".into()),
            Lib::Dexie => Some("node_modules/dexie/dist/dexie.min.js".into()),
            _ => None,
        }
    }
}

pub fn get_js_file(path: impl AsRef<::std::path::Path>) -> Result<String, Error> {
    let path = path.as_ref();
    if !path.exists() {
        npm_install()?;
        if !path.exists() {
            panic!("npm install failed to make {:?} available", path);
        }
    }
    read_to_string(path)
}

pub fn npm_install() -> Result<(), Error> {
    let mut c = ::std::process::Command::new("npm");
    c.arg("i");
    c.output()?;
    Ok(())
}