@cocalc/project/dist/formatters/gofmt.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.gofmt = 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://golang.org/cmd/gofmt/ ... but there isn't anything to configure
function run_gofmt(input_path) {
    const args = ["-w", input_path];
    return spawn("gofmt", args);
}
function cleanup_error(err, tmpfn) {
    const ret = [];
    for (let line of err.split("\n")) {
        if (line.startsWith(tmpfn)) {
            line = line.slice(tmpfn.length + 1);
        }
        ret.push(line);
    }
    return ret.join("\n");
}
async function gofmt(input, options, logger) {
    // create input temp file
    const input_path = await callback(tmp.file);
    try {
        // logger.debug(`gofmt tmp file: ${input_path}`);
        await callback(writeFile, input_path, input);
        // spawn the html formatter
        let formatter;
        switch (options.parser) {
            case "gofmt":
                formatter = run_gofmt(input_path /*, logger*/);
                break;
            default:
                throw Error(`Unknown Go code formatting utility '${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 = `Gofmt code formatting utility "${options.parser}" exited with code ${code}\nOutput:\n${stdout}\n${stderr}`;
            logger.debug(`gofmt 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(`gofmt_format output s ${s}`);
        return s;
    }
    finally {
        unlink(input_path, () => { });
    }
}
exports.gofmt = gofmt;
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