@struktoai/mirage-core/dist/runtime/script.js

A Unified Virtual Filesystem For AI Agents

import { LanguageRuntime } from "./language.js";
import { buildRuntime } from "./table.js";
/**
 * Build the runtime a config program runs on: the one the config named,
 * with the settings it gave.
 *
 * A policy program that names no runtime arrives here as monty, the
 * default its parser fills in, so a missing `@pydantic/monty` is
 * reported as any missing dependency is, never swapped for another
 * runtime. The runtime is
 * built fresh and never picked out of a workspace's runtime world: the
 * world is the ordered set that serves *agent* code, it is mutable after
 * construction, and an entry drops out of it silently when an optional
 * dependency is missing. Throws a plain Error whose message is a clause
 * about "script", for the caller to prefix with whose script it is.
 * Mirrors the Python `script_engine`.
 */
export function scriptEngine(script, runtime, config = {}) {
    let built;
    try {
        built = buildRuntime(runtime, Object.keys(config).length === 0 ? {} : { config });
    }
    catch (err) {
        // A runtime reports a missing dependency as its own error, each
        // carrying its own install hint.
        const detail = err instanceof Error ? err.message : String(err);
        throw new Error(`script names runtime '${runtime}': ${detail}`);
    }
    if (!(built instanceof LanguageRuntime)) {
        throw new Error(`script names runtime '${runtime}', which runs no programs`);
    }
    if (built.language !== script.language) {
        throw new Error(`script is ${script.language}, but names runtime '${runtime}', which speaks ${built.language}`);
    }
    return built;
}
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