react-run 0.3.1

Run React code snippets/components from your command-line without config
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use minreq::get;
use std::{fs, sync};
use swc::config::{JscConfig, Options};
use swc_common::{
    errors::{ColorConfig, Handler},
    FileName, SourceMap,
};
use url::Url;

static TEMPLATE: &str = include_str!("template.html");

fn compile_jsx(app: &str) -> String {
    let cm = sync::Arc::<SourceMap>::default();

    let fm = cm.new_source_file(FileName::Custom("temp_file_name".into()), app.into());

    let handler = sync::Arc::new(Handler::with_tty_emitter(
        ColorConfig::Auto,
        true,
        false,
        Some(cm.clone()),
    ));

    let c = swc::Compiler::new(cm.clone());

    let output = c
        .process_js_file(
            fm,
            &handler,
            &Options {
                config: swc::config::Config {
                    jsc: JscConfig {
                        syntax: Some(swc_ecma_parser::Syntax::Typescript(
                            swc_ecma_parser::TsConfig {
                                tsx: true,
                                ..Default::default()
                            },
                        )),
                        ..Default::default()
                    },
                    ..Default::default()
                },
                ..Default::default()
            },
        )
        .expect("failed to process file");

    output.code
}

fn is_valid_url(url: &str) -> bool {
    Url::parse(url).is_ok()
}

pub fn react_app(file: &str) -> String {
    let app = if is_valid_url(file) {
        get(file)
            .send()
            .unwrap_or_else(|e| panic!("Error fetching \"{}\": {:?}", file, e))
            .as_str()
            .unwrap_or_else(|e| panic!("Error parsing response as string: {:?}", e))
            .to_owned()
    } else {
        fs::read_to_string(file)
            .unwrap_or_else(|e| panic!("Could not read file \"{}\": {:?}.", file, e))
    };

    let compiled_app = compile_jsx(&app);

    TEMPLATE.replace("// APP", &compiled_app)
}