620 lines
19 KiB
TypeScript
620 lines
19 KiB
TypeScript
import * as pathUtil from "path";
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import * as fs from 'fs';
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import { symlinkSync, readFileSync, createReadStream, createWriteStream } from 'fs';
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import * as mkdirp from 'mkdirp';
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import { sync as existsSync, async as existsASync } from './exists';
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import { create as matcher } from './utils/matcher';
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import { normalizeFileMode as fileMode } from './utils/mode';
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import { sync as treeWalkerSync } from './utils/tree_walker';
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import { validateArgument, validateOptions } from './utils/validate';
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import { sync as writeSync } from './write';
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import { ErrDestinationExists, ErrDoesntExists } from './errors';
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import { INode, ENodeType, IWriteOptions, ECopyFlags, ENodeOperationStatus, EError, ErrnoException, EInspectFlags, IProcessingNode, ICopyOptions, EResolveMode, IConflictSettings, EResolve, TCopyResult, INodeReport } from './interfaces';
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import { createItem } from './inspect';
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import { sync as rmSync } from './remove';
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import { promisify } from './promisify';
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import { async as iteratorAsync } from './iterator';
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import { ArrayIterator } from '@xblox/core/iterator';
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const promisedSymlink = promisify(fs.symlink);
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const promisedReadlink = promisify(fs.readlink);
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const promisedUnlink = promisify(fs.unlink);
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const promisedMkdirp = promisify<string, any, Function>(mkdirp);
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const progress = require('progress-stream');
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const throttle = require('throttle');
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const CPROGRESS_THRESHOLD = 1048576 * 5; // minimum file size threshold to use write progress = 5MB
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export function validateInput(methodName: string, from: string, to: string, options?: ICopyOptions): void {
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const methodSignature = methodName + '(from, to, [options])';
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validateArgument(methodSignature, 'from', from, ['string']);
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validateArgument(methodSignature, 'to', to, ['string']);
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validateOptions(methodSignature, 'options', options, {
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overwrite: ['boolean'],
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matching: ['string', 'array of string'],
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progress: ['function'],
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writeProgress: ['function'],
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conflictCallback: ['function'],
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conflictSettings: ['object'],
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throttel: ['number'],
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debug: ['boolean'],
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flags: ['number']
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});
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};
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const parseOptions = (options: any | null, from: string): ICopyOptions => {
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const opts: ICopyOptions = options || {} as ICopyOptions;
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const parsedOptions: ICopyOptions = {};
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parsedOptions.overwrite = opts.overwrite;
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parsedOptions.progress = opts.progress;
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parsedOptions.writeProgress = opts.writeProgress;
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parsedOptions.conflictCallback = opts.conflictCallback;
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parsedOptions.conflictSettings = opts.conflictSettings;
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parsedOptions.debug = opts.debug;
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parsedOptions.throttel = opts.throttel;
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parsedOptions.flags = opts.flags || 0;
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if (!opts.filter) {
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if (opts.matching) {
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parsedOptions.filter = matcher(from, opts.matching);
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} else {
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parsedOptions.filter = () => { return true; };
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}
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}
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return parsedOptions;
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};
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// ---------------------------------------------------------
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// Sync
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// ---------------------------------------------------------
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const checksBeforeCopyingSync = (from: string, to: string, options?: ICopyOptions) => {
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if (!existsSync(from)) {
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throw ErrDoesntExists(from);
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}
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if (existsSync(to) && !options.overwrite) {
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throw ErrDestinationExists(to);
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}
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};
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async function copyFileSyncWithProgress(from: string, to: string, options?: ICopyOptions) {
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return new Promise((resolve, reject) => {
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const started = Date.now();
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let cbCalled = false;
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let elapsed = Date.now();
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let speed = 0;
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let done = (err?: any) => {
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if (!cbCalled) {
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cbCalled = true;
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resolve();
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}
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};
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const rd = createReadStream(from).
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on("error", (err: Error) => done(err));
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const str = progress({
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length: fs.statSync(from).size,
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time: 100
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}).on('progress', (e: any) => {
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elapsed = (Date.now() - started) / 1000;
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speed = e.transferred / elapsed;
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options.writeProgress(from, e.transferred, e.length);
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});
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const wr = createWriteStream(to);
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wr.on("error", (err: Error) => done(err));
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wr.on("close", done);
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rd.pipe(str).pipe(wr);
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});
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};
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async function copyFileSync(from: string, to: string, mode: string, options?: ICopyOptions) {
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const data = readFileSync(from);
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const writeOptions: IWriteOptions = {
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mode: mode
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};
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if (options && options.writeProgress) {
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await copyFileSyncWithProgress(from, to, options);
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} else {
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writeSync(to, data, writeOptions);
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}
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};
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const copySymlinkSync = (from: string, to: string) => {
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const symlinkPointsAt = fs.readlinkSync(from);
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try {
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symlinkSync(symlinkPointsAt, to);
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} catch (err) {
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// There is already file/symlink with this name on destination location.
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// Must erase it manually, otherwise system won't allow us to place symlink there.
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if (err.code === 'EEXIST') {
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fs.unlinkSync(to);
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// Retry...
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fs.symlinkSync(symlinkPointsAt, to);
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} else {
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throw err;
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}
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}
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};
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async function copyItemSync(from: string, inspectData: INode, to: string, options: ICopyOptions) {
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const mode: string = fileMode(inspectData.mode);
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if (inspectData.type === ENodeType.DIR) {
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mkdirp.sync(to, { mode: parseInt(mode, 8), fs: null });
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} else if (inspectData.type === ENodeType.FILE) {
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await copyFileSync(from, to, mode, options);
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} else if (inspectData.type === ENodeType.SYMLINK) {
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copySymlinkSync(from, to);
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}
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};
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export function sync(from: string, to: string, options?: ICopyOptions): void {
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const opts = parseOptions(options, from);
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checksBeforeCopyingSync(from, to, opts);
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let nodes: IProcessingNode[] = [];
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let sizeTotal = 0;
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if (options && options.flags & ECopyFlags.EMPTY) {
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const dstStat = fs.statSync(to);
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if (dstStat.isDirectory()) {
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rmSync(to);
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}
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}
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const visitor = (path: string, inspectData: INode) => {
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if (opts.filter(path)) {
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nodes.push({
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path: path,
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item: inspectData,
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dst: pathUtil.resolve(to, pathUtil.relative(from, path))
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});
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sizeTotal += inspectData.size;
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}
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};
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treeWalkerSync(from, {
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inspectOptions: {
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mode: true,
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symlinks: true
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}
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}, visitor);
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Promise.all(nodes.map(async (item, current) => {
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await copyItemSync(item.path, item.item, item.dst, options);
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if (opts.progress) {
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opts.progress(item.path, current, nodes.length, item.item);
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}
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}));
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};
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// ---------------------------------------------------------
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// Async
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// ---------------------------------------------------------
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/**
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*
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*
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* @param {string} from
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* @param {string} to
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* @param {ICopyOptions} opts
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* @returns {(Promise<IConflictSettings | any>)}
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*/
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const checkAsync = (from: string, to: string, opts: ICopyOptions): Promise<IConflictSettings | any> => {
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return existsASync(from)
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.then(srcPathExists => {
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if (!srcPathExists) {
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throw ErrDoesntExists(from);
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} else {
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return existsASync(to);
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}
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})
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.then(destPathExists => {
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if (destPathExists) {
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if (opts.conflictSettings) {
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return Promise.resolve(opts.conflictSettings);
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}
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if (opts.conflictCallback) {
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const promise = opts.conflictCallback(to, createItem(to), EError.EXISTS);
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promise.then((settings: IConflictSettings) => {
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settings.error = EError.EXISTS;
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});
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return promise;
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}
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if (!opts.overwrite) {
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throw ErrDestinationExists(to);
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}
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}
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});
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};
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const copyFileAsync = (from: string, to: string, mode: any, options?: ICopyOptions, retriedAttempt?: boolean) => {
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return new Promise((resolve, reject) => {
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const readStream = fs.createReadStream(from);
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const writeStream = fs.createWriteStream(to, { mode: mode });
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readStream.on('error', reject);
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writeStream.on('error', (err: ErrnoException) => {
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const toDirPath = pathUtil.dirname(to);
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// Force read stream to close, since write stream errored
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// read stream serves us no purpose.
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readStream.resume();
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if (err.code === EError.NOEXISTS && retriedAttempt === undefined) {
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// Some parent directory doesn't exits. Create it and retry.
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promisedMkdirp(toDirPath, null).then(() => {
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// Make retry attempt only once to prevent vicious infinite loop
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// (when for some obscure reason I/O will keep returning ENOENT error).
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// Passing retriedAttempt = true.
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copyFileAsync(from, to, mode, null, true)
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.then(resolve)
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.catch(reject);
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});
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} else {
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reject(err);
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}
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});
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writeStream.on('finish', () => {
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// feature: preserve times
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if (options && options.flags & ECopyFlags.PRESERVE_TIMES) {
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const sourceStat = fs.statSync(from);
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fs.open(to, 'w', (err: ErrnoException, fd: number) => {
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if (err) { throw err; };
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fs.futimes(fd, sourceStat.atime, sourceStat.mtime, (err) => {
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if (err) {
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throw err;
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};
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fs.close(fd);
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resolve();
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});
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});
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} else {
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resolve();
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}
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});
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const size = fs.statSync(from).size;
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let progressStream = null;
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if (options && options.writeProgress && size > CPROGRESS_THRESHOLD) {
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progressStream = progress({
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length: fs.statSync(from).size,
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time: 100 // call progress each 100 ms
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});
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let elapsed = Date.now();
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let speed = 0;
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const started = Date.now();
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progressStream.on('progress', (e: any) => {
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elapsed = (Date.now() - started) / 1000;
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speed = e.transferred / elapsed;
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options.writeProgress(from, e.transferred, e.length);
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if (options.debug) {
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console.log('write ' + from + ' (' + e.transferred + ' of ' + e.length);
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}
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});
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if (options.throttel) {
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readStream.pipe(progressStream).pipe(new throttle(options.throttel)).pipe(writeStream);
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} else {
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readStream.pipe(progressStream).pipe(writeStream);
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}
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} else {
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if (options && options.debug) {
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console.log('write ' + from + ' to ' + to);
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}
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readStream.pipe(writeStream);
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}
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});
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};
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export function copySymlinkAsync(from: string, to: string) {
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return promisedReadlink(from)
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.then((symlinkPointsAt: string) => {
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return new Promise((resolve, reject) => {
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promisedSymlink(symlinkPointsAt, to, null, null)
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.then(resolve)
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.catch((err: ErrnoException) => {
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if (err.code === EError.EXISTS) {
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// There is already file/symlink with this name on destination location.
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// Must erase it manually, otherwise system won't allow us to place symlink there.
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promisedUnlink(to, null)
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// Retry...
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.then(() => { return promisedSymlink(symlinkPointsAt, to, null, null); })
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.then(resolve, reject);
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} else {
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reject(err);
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}
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});
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});
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});
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};
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const copyItemAsync = (from: string, inspectData: INode, to: string, options: ICopyOptions): Promise<any> => {
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const mode = fileMode(inspectData.mode);
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if (inspectData.type === ENodeType.DIR) {
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return promisedMkdirp(to, { mode: mode });
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} else if (inspectData.type === ENodeType.FILE) {
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return copyFileAsync(from, to, mode, options);
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} else if (inspectData.type === ENodeType.SYMLINK) {
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return copySymlinkAsync(from, to);
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}
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// EInspectItemType.OTHER
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return Promise.resolve();
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};
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// handle user side setting "THROW" and non enum values (null)
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const onConflict = (from: string, to: string, options: ICopyOptions, settings: IConflictSettings): EResolveMode | undefined => {
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switch (settings.overwrite) {
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case EResolveMode.THROW: {
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throw ErrDestinationExists(to);
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}
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case EResolveMode.OVERWRITE:
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case EResolveMode.APPEND:
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case EResolveMode.IF_NEWER:
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case EResolveMode.ABORT:
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case EResolveMode.IF_SIZE_DIFFERS:
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case EResolveMode.SKIP: {
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return settings.overwrite;
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}
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}
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return undefined;
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};
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export function resolveConflict(from: string, to: string, options: ICopyOptions, resolveMode: EResolveMode): boolean {
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if (resolveMode === undefined) {
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return true;
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}
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const src = createItem(from);
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const dst = createItem(to);
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if (resolveMode === EResolveMode.SKIP) {
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return false;
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} else if (resolveMode === EResolveMode.IF_NEWER) {
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if (src.type === ENodeType.DIR && dst.type === ENodeType.DIR) {
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return true;
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}
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if (dst.modifyTime.getTime() > src.modifyTime.getTime()) {
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return false;
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}
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} else if (resolveMode === EResolveMode.IF_SIZE_DIFFERS) {
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// @TODO : not implemented: copy EInspectItemType.DIR with ECopyResolveMode.IF_SIZE_DIFFERS
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if (src.type === ENodeType.DIR && dst.type === ENodeType.DIR) {
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return true;
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} else if (src.type === ENodeType.FILE && dst.type === ENodeType.FILE) {
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if (src.size === dst.size) {
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return false;
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}
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}
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} else if (resolveMode === EResolveMode.OVERWRITE) {
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return true;
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} else if (resolveMode === EResolveMode.ABORT) {
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return false;
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}
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};
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function isDone(nodes: IProcessingNode[]) {
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let done = true;
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nodes.forEach((element: IProcessingNode) => {
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if (element.status !== ENodeOperationStatus.DONE) {
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done = false;
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}
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});
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return done;
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}
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/**
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* A callback for treeWalkerStream. This is called when a node has been found.
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*
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* @param {string} from
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* @param {string} to
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* @param {*} vars
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* @param {{ path: string, item: INode }} item
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* @returns {Promise<void>}
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*/
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async function visitor(from: string, to: string, vars: IVisitorArgs, item: IProcessingNode): Promise<void> {
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const options = vars.options;
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let rel: string;
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let destPath: string;
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if (!item) {
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return;
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}
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rel = pathUtil.relative(from, item.path);
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destPath = pathUtil.resolve(to, rel);
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item.status = ENodeOperationStatus.PROCESSING;
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const done = () => {
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item.status = ENodeOperationStatus.DONE;
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if (isDone(vars.nodes)) {
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return vars.resolve(vars.result);
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}
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};
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if (isDone(vars.nodes)) {
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return vars.resolve(vars.result);
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}
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vars.filesInProgress += 1;
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// our main function after sanity checks
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const checked = (subResolveSettings: IConflictSettings) => {
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item.status = ENodeOperationStatus.CHECKED;
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// feature : report
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if (subResolveSettings && options && options.flags && options.flags & ECopyFlags.REPORT) {
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(vars.result as INodeReport[]).push({
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error: subResolveSettings.error,
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node: item,
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resolved: subResolveSettings
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} as INodeReport);
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}
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if (subResolveSettings) {
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// if the first resolve callback returned an individual resolve settings "THIS",
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// ask the user again with the same item
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let always = subResolveSettings.mode === EResolve.ALWAYS;
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if (always) {
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options.conflictSettings = subResolveSettings;
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}
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let overwriteMode = subResolveSettings.overwrite;
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overwriteMode = onConflict(item.path, destPath, options, subResolveSettings);
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if (overwriteMode === EResolveMode.ABORT) {
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vars.abort = true;
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}
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if (vars.abort) {
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return;
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}
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if (!resolveConflict(item.path, destPath, options, overwriteMode)) {
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done();
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return;
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}
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}
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item.status = ENodeOperationStatus.PROCESS;
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copyItemAsync(item.path, item.item, destPath, options).then(() => {
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vars.filesInProgress -= 1;
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if (options.progress) {
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if (options.progress(item.path, vars.filesInProgress, vars.filesInProgress, item.item) === false) {
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vars.abort = true;
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return vars.resolve();
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}
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}
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done();
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}).catch((err: ErrnoException) => {
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if (options && options.conflictCallback) {
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if (err.code === EError.PERMISSION || err.code === EError.NOEXISTS) {
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options.conflictCallback(item.path, createItem(destPath), err.code).then((errorResolveSettings: IConflictSettings) => {
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// the user has set the conflict resolver to always, so we use the last one
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if (vars.onCopyErrorResolveSettings) {
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errorResolveSettings = vars.onCopyErrorResolveSettings;
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}
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// user said use this settings always, we track and use this last setting from now on
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if (errorResolveSettings.mode === EResolve.ALWAYS && !vars.onCopyErrorResolveSettings) {
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vars.onCopyErrorResolveSettings = errorResolveSettings;
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}
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if (errorResolveSettings.overwrite === EResolveMode.ABORT) {
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vars.abort = true;
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return vars.resolve();
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}
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if (errorResolveSettings.overwrite === EResolveMode.THROW) {
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vars.abort = true;
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return vars.reject(err);
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}
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if (errorResolveSettings.overwrite === EResolveMode.SKIP) {
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vars.filesInProgress -= 1;
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}
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// user error, should never happen, unintended
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if (errorResolveSettings.overwrite === EResolveMode.IF_NEWER ||
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errorResolveSettings.overwrite === EResolveMode.IF_SIZE_DIFFERS ||
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errorResolveSettings.overwrite === EResolveMode.OVERWRITE) {
|
|
vars.reject(new ErrnoException('settings make no sense : errorResolveSettings.overwrite = ' + errorResolveSettings.overwrite));
|
|
}
|
|
});
|
|
}
|
|
}
|
|
vars.reject(err);
|
|
});
|
|
};
|
|
return checkAsync(item.path, destPath, options).then(checked);
|
|
}
|
|
function next(nodes: IProcessingNode[]): IProcessingNode {
|
|
for (let i = 0; i < nodes.length; i++) {
|
|
if (nodes[i].status === ENodeOperationStatus.COLLECTED) {
|
|
return nodes[i];
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
interface IVisitorArgs {
|
|
resolve: Function;
|
|
reject: Function;
|
|
abort: boolean;
|
|
filesInProgress: number;
|
|
resolveSettings: IConflictSettings;
|
|
options: ICopyOptions;
|
|
result: TCopyResult;
|
|
nodes: IProcessingNode[];
|
|
onCopyErrorResolveSettings: IConflictSettings;
|
|
}
|
|
|
|
/**
|
|
* Final async copy function.
|
|
* @export
|
|
* @param {string} from
|
|
* @param {string} to
|
|
* @param {ICopyOptions} [options]
|
|
* @returns
|
|
*/
|
|
export function async(from: string, to: string, options?: ICopyOptions): Promise<TCopyResult> {
|
|
options = parseOptions(options, from);
|
|
return new Promise<TCopyResult>((resolve, reject) => {
|
|
checkAsync(from, to, options).then((resolver: IConflictSettings) => {
|
|
if (!resolver) {
|
|
resolver = options.conflictSettings || {
|
|
mode: EResolve.THIS,
|
|
overwrite: EResolveMode.OVERWRITE
|
|
};
|
|
} else {
|
|
if (resolver.mode === EResolve.ALWAYS) {
|
|
options.conflictSettings = resolver;
|
|
}
|
|
}
|
|
let overwriteMode = resolver.overwrite;
|
|
let result: TCopyResult = void 0;
|
|
|
|
if (options && options.flags && options.flags & ECopyFlags.REPORT) {
|
|
result = [];
|
|
}
|
|
|
|
// call onConflict to eventually throw an error
|
|
overwriteMode = onConflict(from, to, options, resolver);
|
|
|
|
// now evaluate the copy conflict settings and eventually abort
|
|
if (options && options.conflictSettings && !resolveConflict(from, to, options, overwriteMode)) {
|
|
return resolve();
|
|
}
|
|
// feature: clean before
|
|
if (options && options.flags & ECopyFlags.EMPTY) {
|
|
const dstStat = fs.statSync(to);
|
|
if (dstStat.isDirectory()) {
|
|
rmSync(to);
|
|
}
|
|
}
|
|
// walker variables
|
|
const visitorArgs: IVisitorArgs = {
|
|
resolve: resolve,
|
|
reject: reject,
|
|
abort: false,
|
|
filesInProgress: 0,
|
|
resolveSettings: resolver,
|
|
options: options,
|
|
result: result,
|
|
nodes: [],
|
|
onCopyErrorResolveSettings: null
|
|
};
|
|
const nodes = visitorArgs.nodes;
|
|
// a function called when the treeWalkerStream or visitor has been finished
|
|
const process = function () {
|
|
visitorArgs.nodes = nodes;
|
|
if (isDone(nodes)) {
|
|
return resolve(result);
|
|
}
|
|
if (nodes.length) {
|
|
const item = next(nodes);
|
|
if (item) {
|
|
visitor(item.path, item.dst, visitorArgs, item).then(process);
|
|
}
|
|
}
|
|
};
|
|
|
|
let flags: EInspectFlags = EInspectFlags.MODE;
|
|
if (options && options.flags && options.flags & ECopyFlags.FOLLOW_SYMLINKS) {
|
|
flags |= EInspectFlags.SYMLINKS;
|
|
}
|
|
iteratorAsync(from, {
|
|
filter: options.filter,
|
|
flags: flags
|
|
}).then((it: ArrayIterator<IProcessingNode>) => {
|
|
let node: IProcessingNode = null;
|
|
while (node = it.next()) {
|
|
nodes.push({
|
|
path: node.path,
|
|
item: node.item,
|
|
dst: pathUtil.resolve(to, pathUtil.relative(from, node.path)),
|
|
status: ENodeOperationStatus.COLLECTED
|
|
});
|
|
}
|
|
process();
|
|
});
|
|
}).catch(reject);
|
|
});
|
|
};
|