cesr/dist/cli/cli.js

[](https://www.npmjs.com/package/cesr) [](https://github.com/lenkan/cesr-js/blob/main/LICENSE)

import { parseMessages } from "../message.js";
function parseArgs(inputArgs, opts) {
    const helpText = [
        `Usage: cesr [options] <input>`,
        "",
        "Parses an input CESR stream.",
        "",
        "Arguments:",
        "  <input>  The input file to parse. Use '-' for stdin. Can also be a URL.",
        "",
        "Options:",
        ...Object.entries(opts).map(([key, value]) => {
            return `  ${key} ${value.description}`;
        }),
    ].join("\n");
    const args = [];
    const options = {};
    inputArgs.forEach((arg) => {
        if (!arg.startsWith("--")) {
            args.push(arg);
            return;
        }
        if (arg.includes("=")) {
            const [key, value] = arg.split("=");
            options[key] = value;
            return;
        }
        options[arg] = true;
    });
    return {
        _: args,
        options,
        helpText,
    };
}
function formatError(message, help) {
    return `Error: ${message}\n\n${help}`;
}
export async function execute(cli) {
    const app = parseArgs(cli.args, {
        "--help": {
            description: "Show help",
        },
        "--pretty": {
            description: "Pretty print the output",
        },
    });
    const input = app.options["--input"] || app._[0];
    if (app.options["--help"]) {
        console.log(app.helpText);
        return;
    }
    if (typeof input !== "string" || input.length === 0) {
        throw new Error(formatError("No input file specified.", app.helpText));
    }
    const stream = cli.read(input);
    for await (const message of parseMessages(stream)) {
        if (app.options["--pretty"]) {
            console.dir(message, { depth: 100, colors: true });
        }
        else {
            console.log(JSON.stringify(message));
        }
    }
}