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gzipper

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CLI for compressing files.

166 lines 15.6 kB
import { parentPort, workerData } from 'node:worker_threads'; import { createReadStream, createWriteStream } from 'node:fs'; import { lstat, unlink } from 'node:fs/promises'; import { pipeline } from 'node:stream/promises'; import path from 'node:path'; import crypto from 'node:crypto'; import { OUTPUT_FILE_FORMAT_REGEXP } from './constants.js'; import { createFolders, checkFileExists, readableSize, readableHrtime, } from './helpers.js'; import { Logger } from './logger/Logger.js'; import { CompressService } from './Compress.service.js'; import { Incremental } from './Incremental.js'; class CompressWorker { options = workerData.options; chunk = workerData.chunk; target = workerData.target; outputPath = workerData.outputPath; incrementalFilePaths = workerData.incrementalFilePaths; incremental; service; compressionInstances; logger; constructor() { if (this.options.incremental) { this.incremental = new Incremental(); this.incremental.filePaths = this.incrementalFilePaths; } this.logger = new Logger(); this.logger.initialize({ verbose: this.options.verbose, color: this.options.color, }); this.service = new CompressService(this.options); this.compressionInstances = this.service.getCompressionInstances(); } /** * Compress files list and returns files and incremental data. */ async compressFiles() { const filesList = []; for (const compressionInstance of this.compressionInstances) { for (const filePath of this.chunk) { const hrtimeStart = process.hrtime(); const fileInfo = await this.compressFile(path.basename(filePath), path.dirname(filePath), compressionInstance); if (!fileInfo.removeCompressed && !fileInfo.isSkipped) { filesList.push(filePath); } if (this.options.verbose) { const hrTimeEnd = process.hrtime(hrtimeStart); this.logger.log(this.getCompressedFileMsg(compressionInstance, filePath, fileInfo, hrTimeEnd)); } } } return { files: filesList, filePaths: this.incremental?.filePaths, }; } /** * File compression. */ async compressFile(filename, target, compressionInstance) { const createCompression = await compressionInstance.getCompression(); let isCached = false; let isSkipped = false; const inputPath = path.join(target, filename); if (this.outputPath) { const isFileTarget = (await lstat(this.target)).isFile(); target = isFileTarget ? this.outputPath : path.join(this.outputPath, path.relative(this.target, target)); await createFolders(target); } const outputPath = this.getOutputPath(target, filename, compressionInstance.ext); if (this.options.skipCompressed) { if (await checkFileExists(outputPath)) { isSkipped = true; return { isCached, isSkipped }; } } if (this.options.incremental) { const checksum = await this.incremental.getFileChecksum(inputPath); const { isChanged, fileId } = this.incremental.setFile(inputPath, checksum, compressionInstance.compressionName, compressionInstance.compressionOptions); const cachedFile = path.resolve(this.incremental.cacheFolder, fileId); if (isChanged) { await pipeline(createReadStream(inputPath), createCompression, createWriteStream(outputPath)); await pipeline(createReadStream(outputPath), createWriteStream(cachedFile)); } else { await pipeline(createReadStream(cachedFile), createWriteStream(outputPath)); isCached = true; } } else { await pipeline(createReadStream(inputPath), createCompression, createWriteStream(outputPath)); } if (this.options.verbose || this.options.removeLarger) { const beforeSize = (await lstat(inputPath)).size; const afterSize = (await lstat(outputPath)).size; const removeCompressed = this.options.removeLarger && beforeSize < afterSize; if (removeCompressed) { await unlink(outputPath); } return { beforeSize, afterSize, isCached, isSkipped, removeCompressed, }; } return { isCached, isSkipped }; } /** * Get output path which is based on [outputFileFormat]. */ getOutputPath(target, file, ext) { const artifactsMap = new Map([ ['[filename]', path.parse(file).name], ['[ext]', path.extname(file).slice(1)], ['[compressExt]', ext], ]); let filename = `${artifactsMap.get('[filename]')}.${artifactsMap.get('[ext]')}.${artifactsMap.get('[compressExt]')}`; if (this.options.outputFileFormat) { artifactsMap.set('[hash]', null); filename = this.options.outputFileFormat.replace(OUTPUT_FILE_FORMAT_REGEXP, (artifact) => { if (artifactsMap.has(artifact)) { // Need to generate hash only if we have appropriate param if (artifact === '[hash]') { artifactsMap.set('[hash]', crypto.randomUUID()); } return artifactsMap.get(artifact); } else { return artifact; } }); } filename = filename.replaceAll(/\.+/g, (match, offset, value) => match.length + offset === value.length ? '' : '.'); return path.join(target, filename); } /** * Returns information message about compressed file (size, time, cache, etc.) */ getCompressedFileMsg(compressionInstance, file, fileInfo, hrtime) { const fileRelative = path.relative(this.target, file); const compressionName = compressionInstance.compressionName; if (fileInfo.isSkipped) { return `File ${fileRelative} has been skipped.`; } const getSize = `${readableSize(fileInfo.beforeSize)} -> ${readableSize(fileInfo.afterSize)}`; const getTime = readableHrtime(hrtime); const fileMessage = fileInfo.isCached ? `File ${fileRelative} has been retrieved from the cache.` : `File ${fileRelative} has been compressed.`; return `${fileMessage} \n Algorithm: ${compressionName} \n Size: ${getSize} \n Time: ${getTime}`; } } const compressWorker = new CompressWorker(); (async function () { const { files, filePaths } = await compressWorker.compressFiles(); parentPort?.postMessage({ files, filePaths }); })(); //# 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