@struktoai/mirage-core/dist/policy/builtin/mount_mode.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 { requirePathsWritable } from "../../context/session_context.js";
import { posixPhrase } from "../../errors/posix.js";
/** The configured mode and session grants bound every mutation. An op
 * outside every mount carries an empty prefix and is governed by `/`, the
 * turf a profile's root mode is written under. */
export class MountModePolicy {
    preVfs(ctx) {
        if (!ctx.write || ctx.mode === undefined)
            return null;
        try {
            requirePathsWritable([ctx.path], ctx.prefix || '/', ctx.mode, ctx.call.subtree, ctx.access);
        }
        catch (error) {
            if (!(error instanceof Error))
                throw error;
            return { kind: 'deny', reason: posixPhrase('EROFS'), error };
        }
        return null;
    }
}
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