next/dist/lib/recursive-delete.js

The React Framework

"use strict";
Object.defineProperty(exports, "__esModule", {
    value: true
});
0 && (module.exports = {
    calcBackoffMs: null,
    recursiveDeleteSyncWithAsyncRetries: null
});
function _export(target, all) {
    for(var name in all)Object.defineProperty(target, name, {
        enumerable: true,
        get: all[name]
    });
}
_export(exports, {
    calcBackoffMs: function() {
        return calcBackoffMs;
    },
    recursiveDeleteSyncWithAsyncRetries: function() {
        return recursiveDeleteSyncWithAsyncRetries;
    }
});
const _nodefs = /*#__PURE__*/ _interop_require_wildcard(require("node:fs"));
const _nodepath = require("node:path");
const _iserror = /*#__PURE__*/ _interop_require_default(require("./is-error"));
const _wait = require("./wait");
function _interop_require_default(obj) {
    return obj && obj.__esModule ? obj : {
        default: obj
    };
}
function _getRequireWildcardCache(nodeInterop) {
    if (typeof WeakMap !== "function") return null;
    var cacheBabelInterop = new WeakMap();
    var cacheNodeInterop = new WeakMap();
    return (_getRequireWildcardCache = function(nodeInterop) {
        return nodeInterop ? cacheNodeInterop : cacheBabelInterop;
    })(nodeInterop);
}
function _interop_require_wildcard(obj, nodeInterop) {
    if (!nodeInterop && obj && obj.__esModule) {
        return obj;
    }
    if (obj === null || typeof obj !== "object" && typeof obj !== "function") {
        return {
            default: obj
        };
    }
    var cache = _getRequireWildcardCache(nodeInterop);
    if (cache && cache.has(obj)) {
        return cache.get(obj);
    }
    var newObj = {
        __proto__: null
    };
    var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor;
    for(var key in obj){
        if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) {
            var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null;
            if (desc && (desc.get || desc.set)) {
                Object.defineProperty(newObj, key, desc);
            } else {
                newObj[key] = obj[key];
            }
        }
    }
    newObj.default = obj;
    if (cache) {
        cache.set(obj, newObj);
    }
    return newObj;
}
// We use an exponential backoff. See the unit test for example values.
//
// - Node's `fs` module uses a linear backoff, starting with 100ms.
// - Rust tries 64 times with only a `thread::yield_now` in between.
//
// We want something more aggressive, as `recursiveDelete` is in the critical
// path of `next dev` and `next build` startup.
const INITIAL_RETRY_MS = 8;
const MAX_RETRY_MS = 64;
const MAX_RETRIES = 6;
function calcBackoffMs(attempt) {
    return Math.min(INITIAL_RETRY_MS * Math.pow(2, attempt), MAX_RETRY_MS);
}
function unlinkPath(p, isDir = false, attempt = 0) {
    try {
        if (isDir) {
            _nodefs.rmdirSync(p);
        } else {
            _nodefs.unlinkSync(p);
        }
    } catch (e) {
        const code = (0, _iserror.default)(e) && e.code;
        if ((code === 'EBUSY' || code === 'ENOTEMPTY' || code === 'EPERM' || code === 'EMFILE') && attempt < MAX_RETRIES) {
            // retrying is unlikely to succeed on POSIX platforms, but Windows can
            // fail due to temporarily-open files
            return (async ()=>{
                await (0, _wait.wait)(calcBackoffMs(attempt));
                return unlinkPath(p, isDir, attempt + 1);
            })();
        }
        if (code === 'ENOENT') {
            return;
        }
        throw e;
    }
}
const FUTURE_MTIME_TOLERANCE_MS = 60 * 60 * 1000;
/** Returns whether `p`'s own mtime falls outside the retained time range. */ function isStale(p, staleBefore, futureMtimeThreshold) {
    try {
        // lstat, not stat: a symlink is deleted based on its own age, not its
        // target's.
        const mtimeMs = _nodefs.lstatSync(p).mtimeMs;
        return mtimeMs <= staleBefore || mtimeMs > futureMtimeThreshold;
    } catch (e) {
        if ((0, _iserror.default)(e) && e.code === 'ENOENT') {
            return false;
        }
        throw e;
    }
}
async function recursiveDeleteSyncWithAsyncRetries(/** Directory to delete the contents of */ dir, /** Exclude based on relative file path */ exclude, /**
   * Only delete files whose mtime is at least this old. Directories are
   * removed once empty.
   */ maxAgeMs) {
    const now = Date.now();
    await deleteContents(dir, {
        exclude,
        staleBefore: maxAgeMs === undefined ? undefined : now - maxAgeMs,
        futureMtimeThreshold: now + FUTURE_MTIME_TOLERANCE_MS
    });
}
/** @returns whether anything was kept. */ async function deleteContents(dir, { exclude, staleBefore, futureMtimeThreshold, previousPath }) {
    let result;
    try {
        result = _nodefs.readdirSync(dir, {
            withFileTypes: true
        });
    } catch (e) {
        if ((0, _iserror.default)(e) && e.code === 'ENOENT') {
            return false;
        }
        throw e;
    }
    let keptAnything = false;
    await Promise.all(result.map(async (part)=>{
        const absolutePath = (0, _nodepath.join)(dir, part.name);
        const pp = (0, _nodepath.join)(previousPath ?? '', part.name);
        if (exclude == null ? void 0 : exclude.has(pp)) {
            keptAnything = true;
            return;
        }
        // Note: readdir does not follow symbolic links, that's good: we want to
        // delete the links and not the destination.
        const isDirectory = part.isDirectory();
        if (isDirectory) {
            if (await deleteContents(absolutePath, {
                exclude,
                staleBefore,
                futureMtimeThreshold,
                previousPath: pp
            })) {
                keptAnything = true;
                return;
            }
        } else if (staleBefore !== undefined && !isStale(absolutePath, staleBefore, futureMtimeThreshold)) {
            keptAnything = true;
            return;
        }
        return unlinkPath(absolutePath, isDirectory);
    }));
    return keptAnything;
}

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