@struktoai/mirage-core/dist/commands/builtin/general/hostname.js

A Unified Virtual Filesystem For AI Agents

// ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
import { IOResult } from "../../../io/types.js";
import { command } from "../../config.js";
import { specOf } from "../../spec/builtins.js";
import { FlagView } from "../../spec/flag_view.js";
import { SYNOPSES } from "../../spec/synopsis.js";
import { usageExitCode, usageHint } from "../../spec/usage.js";
import { HOSTNAME } from "../constants.js";
const ENC = new TextEncoder();
// What each display option prints, as a Debian host with no DNS domain whose
// /etc/hosts maps its name to 127.0.1.1; null is the unset NIS domain.
const DISPLAY = {
    short: `${HOSTNAME}\n`,
    fqdn: `${HOSTNAME}\n`,
    long: `${HOSTNAME}\n`,
    domain: '',
    alias: '\n',
    all_fqdns: '\n',
    ip_address: '127.0.1.1\n',
    all_ip_addresses: '\n',
    yp: null,
    nis: null,
};
const NOT_ROOT = 'hostname: you must be root to change the host name\n';
const NO_NIS_DOMAIN = 'hostname: Local domain name not set\n';
const USAGE = `Usage: ${SYNOPSES.hostname ?? ''}\n${usageHint('hostname')}\n`;
// hostname 3.25 (Debian): the name uname -n prints, never the host's. The last
// display option wins, and setting a name is the refusal an unprivileged user
// gets. Misfit operands print the usage line and the --help hint, exit 255,
// where hostname dumps its whole help.
function hostname(_accessor, _paths, texts, ctx) {
    const fl = new FlagView(ctx.flags, specOf('hostname'));
    const typed = fl.typedOrder(...Object.keys(DISPLAY));
    if (texts.length > 1 || (texts.length > 0 && typed.length > 0)) {
        return [null, new IOResult({ exitCode: usageExitCode('hostname'), stderr: ENC.encode(USAGE) })];
    }
    if (texts.length > 0 || fl.asStr('file') !== undefined) {
        return [null, new IOResult({ exitCode: 1, stderr: ENC.encode(NOT_ROOT) })];
    }
    const shown = DISPLAY[typed.at(-1) ?? 'short'];
    if (shown === null || shown === undefined) {
        return [ENC.encode(NO_NIS_DOMAIN), new IOResult({ exitCode: 1 })];
    }
    return [ENC.encode(shown), new IOResult()];
}
export const GENERAL_HOSTNAME = command({
    name: 'hostname',
    vfs: null,
    spec: specOf('hostname'),
    fn: hostname,
});
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