@struktoai/mirage-core/dist/shell/options.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 { SET_FLAG_TO_OPTION } from "./constants.js";
/**
 * Read one option word, or null when the word is an operand.
 *
 * This is bash's `set` grammar, which shell startup speaks too: a sign,
 * then either `o` naming an option in the next word or a cluster of
 * single-letter options, where `-` turns them on and `+` turns them off.
 * `bash -x file` and `set -x` therefore cannot disagree about what `-x`
 * means, and an option one of them learns the other gets.
 *
 * `-`, `--` and a `--long` word are not option words. The first two end
 * option parsing and the third belongs to whoever declares long options,
 * so both are the caller's to answer.
 */
export function parseOptionWord(word, next) {
    const sign = word.charAt(0);
    if (word.length < 2 || (sign !== '-' && sign !== '+') || word.startsWith('--'))
        return null;
    const enable = sign === '-';
    const settings = [];
    let other = '';
    let consumed = 1;
    const chars = word.slice(1);
    for (let i = 0; i < chars.length; i++) {
        const char = chars.charAt(i);
        if (char === 'o') {
            if (next !== null) {
                settings.push([next, enable]);
                consumed = 2;
            }
            continue;
        }
        const option = SET_FLAG_TO_OPTION[char];
        if (option === undefined) {
            other += char;
            continue;
        }
        settings.push([option, enable]);
    }
    return { settings, other, consumed };
}
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