@cocalc/project/dist/formatters/rust-format.js

CoCalc: project daemon

"use strict";
/*
 *  This file is part of CoCalc: Copyright © 2020 Sagemath, Inc.
 *  License: AGPLv3 s.t. "Commons Clause" – see LICENSE.md for details
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.rust_format = void 0;
const { writeFile, readFile, unlink } = require("fs");
const tmp = require("tmp");
const { callback } = require("awaiting");
const { spawn } = require("child_process");
function close(proc, cb) {
    proc.on("close", (code) => cb(undefined, code));
}
// ref: https://github.com/rust-lang/rustfmt ... but the configuration comes with project specific toml files
function run_rustfmt(input_path) {
    return spawn("rustfmt", [input_path]);
}
function cleanup_error(out, tmpfn) {
    return out
        .split("\n")
        .filter((line) => line.indexOf(tmpfn) < 0)
        .join("\n");
}
async function rust_format(input, options, logger) {
    // create input temp file
    const input_path = await callback(tmp.file);
    try {
        // logger.debug(`rustfmt tmp file: ${input_path}`);
        await callback(writeFile, input_path, input);
        // spawn the html formatter
        let formatter;
        switch (options.parser) {
            case "rustfmt":
                formatter = run_rustfmt(input_path /*, logger*/);
                break;
            default:
                throw Error(`Unknown Rust code formatting utility '${options.parser}'`);
        }
        // stdout/err capture
        let stdout = "";
        let stderr = "";
        // read data as it is produced.
        formatter.stdout.on("data", (data) => (stdout += data.toString()));
        formatter.stderr.on("data", (data) => (stderr += data.toString()));
        // wait for subprocess to close.
        const code = await callback(close, formatter);
        if (code >= 1) {
            stdout = cleanup_error(stdout, input_path);
            stderr = cleanup_error(stderr, input_path);
            const err_msg = [stdout, stderr].filter((x) => !!x).join("\n");
            logger.debug(`rustfmt error: ${err_msg}`);
            throw Error(err_msg);
        }
        // all fine, we read from the temp file
        const output = await callback(readFile, input_path);
        const s = output.toString("utf-8");
        // logger.debug(`rust_format output s ${s}`);
        return s;
    }
    finally {
        unlink(input_path, () => { });
    }
}
exports.rust_format = rust_format;
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