@struktoai/mirage-core/dist/commands/builtin/generic_bind/builders/tail.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 { headerAggregate } from "../../aggregators.js";
import { parseFlags, tailGeneric } from "../../generic/tail.js";
import { IOResult } from "../../../../io/types.js";
import { commandFiles, dirAwareStat, dirAwareStream, fileSize, resolveOrEmpty } from "../files.js";
const tail = async (_accessor, paths, texts, ctx) => {
    const parsed = parseFlags(ctx.flags);
    if (parsed instanceof IOResult)
        return [null, parsed];
    const files = commandFiles(ctx, paths);
    const resolved = await resolveOrEmpty(files, paths);
    const backendStat = dirAwareStat(files, ctx);
    const readSize = fileSize(files, ctx, true);
    async function stat(path) {
        const row = await backendStat(path);
        return row.with({ size: await readSize(path) });
    }
    return tailGeneric(parsed, resolved, texts, ctx, dirAwareStream(files, ctx), stat, files.answers('read_range') ? files.read : null, files.answers('last_lines') ? files.lastLines : undefined, files.answers('follow') ? files.follow : undefined);
};
export const BUILDER = {
    name: 'tail',
    read: true,
    aggregate: headerAggregate,
    fn: tail,
};
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