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

A Unified Virtual Filesystem For AI Agents

const TOKEN = /%\{([^}]*)\}|%%|\\([nrt\\])/g;
const ESCAPES = { n: '\n', r: '\r', t: '\t', '\\': '\\' };
/** Format observable transfer facts; unavailable variables diagnose instead of inventing values. */
export function renderWriteOut(template, values) {
    const streams = [[], []];
    let stream = 0;
    let cursor = 0;
    for (const match of template.matchAll(TOKEN)) {
        streams[stream].push(template.slice(cursor, match.index));
        const name = match[1];
        if (name === 'stdout' || name === 'stderr')
            stream = name === 'stderr' ? 1 : 0;
        else if (name === 'onerror') {
            if (values.exitcode === '0')
                return [
                    new TextEncoder().encode(streams[0].join('')),
                    new TextEncoder().encode(streams[1].join('')),
                ];
        }
        else if (name !== undefined) {
            if (Object.hasOwn(values, name))
                streams[stream].push(values[name] ?? '');
            else
                streams[1].push(`curl: unknown --write-out variable: '${name}'\n`);
        }
        else if (match[2] !== undefined)
            streams[stream].push(ESCAPES[match[2]] ?? '');
        else
            streams[stream].push('%');
        cursor = match.index + match[0].length;
    }
    streams[stream].push(template.slice(cursor));
    return [
        new TextEncoder().encode(streams[0].join('')),
        new TextEncoder().encode(streams[1].join('')),
    ];
}
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