@struktoai/mirage-core/dist/runtime/python/monty/constants.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. =========
export const MISSING_PACKAGE_HINT = "monty runtime requires the '@pydantic/monty' package — install it or select the pyodide runtime";
// argv[0] when the caller named no program of its own.
export const DEFAULT_PROG = 'main.py';
export const MAX_URANDOM_BYTES = 1_048_576;
// Monty ends a session past this many host round trips, and every file
// call is one or two, so its default of 1000 stopped a loop of 500 reads.
// The count cannot be turned off, so a checkout sets it past what any run
// reaches; the command limits bound a run instead.
export const LIMITS = { maxSuspensions: 2 ** 31 - 1 };
// How many workers the process's shared pool runs at once, across every
// workspace: an idle worker holds about 9 MB, and a run past this many
// waits for one to come back.
export const POOL_WORKERS = 4;
// A walk or glob reads its whole tree in one `Path.scan`, so these bound
// what one call builds on the host: the entries a reply may hold, and how
// deep a scan that follows links goes when it names no depth, since a
// link to an ancestor would otherwise never end. Monty's own default scan
// stops at the same two numbers.
export const SCAN_MAX_ENTRIES = 100_000;
export const SCAN_LINK_DEPTH = 64;
/**
 * What a refused readlink may mean "no link here". EINVAL is the backend
 * saying the path is not one, and the other three are CPython's own
 * `_ignore_error` list, which is what `Path.is_symlink` swallows around
 * its lstat. Everything else propagates: CPython re-raises
 * PermissionError out of `is_symlink`, and reporting a refusal as "not a
 * link" is an answer the guest cannot tell from one.
 */
export const NOT_A_LINK = new Set([
    'EINVAL',
    'ENOENT',
    'ENOTDIR',
    'ELOOP',
]);
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