const childProcess = require('child_process') const fsPromises = require('fs/promises') const fse = require('fs-extra') const os = require('os') const Path = require('path') const { callbackify, promisify } = require('util') const Settings = require('@overleaf/settings') const logger = require('@overleaf/logger') const OError = require('@overleaf/o-error') const ResourceWriter = require('./ResourceWriter') const LatexRunner = require('./LatexRunner') const OutputFileFinder = require('./OutputFileFinder') const OutputCacheManager = require('./OutputCacheManager') const Metrics = require('./Metrics') const DraftModeManager = require('./DraftModeManager') const TikzManager = require('./TikzManager') const LockManager = require('./LockManager') const Errors = require('./Errors') const CommandRunner = require('./CommandRunner') const { emitPdfStats } = require('./ContentCacheMetrics') const SynctexOutputParser = require('./SynctexOutputParser') const execFile = promisify(childProcess.execFile) const COMPILE_TIME_BUCKETS = [ // NOTE: These buckets are locked in per metric name. // If you want to change them, you will need to rename metrics. 0, 1, 2, 3, 4, 6, 8, 11, 15, 22, 31, 43, 61, 86, 121, 170, 240, ].map(seconds => seconds * 1000) function getCompileName(projectId, userId) { if (userId != null) { return `${projectId}-${userId}` } else { return projectId } } function getCompileDir(projectId, userId) { return Path.join(Settings.path.compilesDir, getCompileName(projectId, userId)) } function getOutputDir(projectId, userId) { return Path.join(Settings.path.outputDir, getCompileName(projectId, userId)) } async function doCompileWithLock(request) { const compileDir = getCompileDir(request.project_id, request.user_id) // use a .project-lock file in the compile directory to prevent // simultaneous compiles const lockFile = Path.join(compileDir, '.project-lock') await fse.ensureDir(compileDir) const lock = await LockManager.acquire(lockFile) try { return await doCompile(request) } finally { await lock.release() } } async function doCompile(request) { const compileDir = getCompileDir(request.project_id, request.user_id) const outputDir = getOutputDir(request.project_id, request.user_id) const timerE2E = new Metrics.Timer( 'compile-e2e-v2', 1, request.metricsOpts, COMPILE_TIME_BUCKETS ) const writeToDiskTimer = new Metrics.Timer( 'write-to-disk', 1, request.metricsOpts ) logger.debug( { projectId: request.project_id, userId: request.user_id }, 'syncing resources to disk' ) let resourceList try { // NOTE: resourceList is insecure, it should only be used to exclude files from the output list resourceList = await ResourceWriter.promises.syncResourcesToDisk( request, compileDir ) } catch (error) { if (error instanceof Errors.FilesOutOfSyncError) { OError.tag(error, 'files out of sync, please retry', { projectId: request.project_id, userId: request.user_id, }) } else { OError.tag(error, 'error writing resources to disk', { projectId: request.project_id, userId: request.user_id, }) } throw error } logger.debug( { projectId: request.project_id, userId: request.user_id, time_taken: Date.now() - writeToDiskTimer.start, }, 'written files to disk' ) const syncStage = writeToDiskTimer.done() // set up environment variables for chktex const env = {} if (Settings.texliveOpenoutAny && Settings.texliveOpenoutAny !== '') { // override default texlive openout_any environment variable env.openout_any = Settings.texliveOpenoutAny } if (Settings.texliveMaxPrintLine && Settings.texliveMaxPrintLine !== '') { // override default texlive max_print_line environment variable env.max_print_line = Settings.texliveMaxPrintLine } // only run chktex on LaTeX files (not knitr .Rtex files or any others) const isLaTeXFile = request.rootResourcePath?.match(/\.tex$/i) if (request.check != null && isLaTeXFile) { env.CHKTEX_OPTIONS = '-nall -e9 -e10 -w15 -w16' env.CHKTEX_ULIMIT_OPTIONS = '-t 5 -v 64000' if (request.check === 'error') { env.CHKTEX_EXIT_ON_ERROR = 1 } if (request.check === 'validate') { env.CHKTEX_VALIDATE = 1 } } // apply a series of file modifications/creations for draft mode and tikz if (request.draft) { await DraftModeManager.promises.injectDraftMode( Path.join(compileDir, request.rootResourcePath) ) } const needsMainFile = await TikzManager.promises.checkMainFile( compileDir, request.rootResourcePath, resourceList ) if (needsMainFile) { await TikzManager.promises.injectOutputFile( compileDir, request.rootResourcePath ) } const compileTimer = new Metrics.Timer('run-compile', 1, request.metricsOpts) // find the image tag to log it as a metric, e.g. 2015.1 (convert . to - for graphite) let tag = 'default' if (request.imageName != null) { const match = request.imageName.match(/:(.*)/) if (match != null) { tag = match[1].replace(/\./g, '-') } } // exclude smoke test if (!request.project_id.match(/^[0-9a-f]{24}$/)) { tag = 'other' } Metrics.inc('compiles', 1, request.metricsOpts) Metrics.inc(`compiles-with-image.${tag}`, 1, request.metricsOpts) const compileName = getCompileName(request.project_id, request.user_id) let compileResult try { compileResult = await LatexRunner.promises.runLatex(compileName, { directory: compileDir, mainFile: request.rootResourcePath, compiler: request.compiler, timeout: request.timeout, image: request.imageName, flags: request.flags, environment: env, compileGroup: request.compileGroup, stopOnFirstError: request.stopOnFirstError, }) // We use errors to return the validation state. It would be nice to use a // more appropriate mechanism. if (request.check === 'validate') { const validationError = new Error('validation') validationError.validate = 'pass' throw validationError } } catch (originalError) { let error = originalError // request was for validation only if (request.check === 'validate' && !error.validate) { error = new Error('validation') error.validate = originalError.code ? 'fail' : 'pass' } // request was for compile, and failed on validation if (request.check === 'error' && originalError.message === 'exited') { error = new Error('compilation') error.validate = 'fail' } // compile was killed by user, was a validation, or a compile which failed validation if (error.terminated || error.validate || error.timedout) { // record timeout errors as a separate counter, success is recorded later if (error.timedout) { Metrics.inc('compiles-timeout', 1, request.metricsOpts) } const { outputFiles } = await OutputFileFinder.promises.findOutputFiles( resourceList, compileDir ) error.outputFiles = outputFiles // return output files so user can check logs } throw error } // compile completed normally let { stats, timings } = compileResult stats = stats || {} timings = timings || {} Metrics.inc('compiles-succeeded', 1, request.metricsOpts) for (const metricKey in stats) { const metricValue = stats[metricKey] Metrics.count(metricKey, metricValue, 1, request.metricsOpts) } for (const metricKey in timings) { const metricValue = timings[metricKey] Metrics.timing(metricKey, metricValue, 1, request.metricsOpts) } const loadavg = typeof os.loadavg === 'function' ? os.loadavg() : undefined if (loadavg != null) { Metrics.gauge('load-avg', loadavg[0]) } const ts = compileTimer.done() logger.debug( { projectId: request.project_id, userId: request.user_id, time_taken: ts, stats, timings, loadavg, }, 'done compile' ) if (stats['latex-runs'] > 0) { Metrics.histogram( 'avg-compile-per-pass-v2', ts / stats['latex-runs'], COMPILE_TIME_BUCKETS, request.metricsOpts ) Metrics.timing( 'avg-compile-per-pass-v2', ts / stats['latex-runs'], 1, request.metricsOpts ) } if (stats['latex-runs'] > 0 && timings['cpu-time'] > 0) { Metrics.timing( 'run-compile-cpu-time-per-pass', timings['cpu-time'] / stats['latex-runs'], 1, request.metricsOpts ) } // Emit compile time. timings.compile = ts const outputStageTimer = new Metrics.Timer( 'process-output-files', 1, request.metricsOpts ) let { outputFiles } = await OutputFileFinder.promises.findOutputFiles( resourceList, compileDir ) try { outputFiles = await OutputCacheManager.promises.saveOutputFiles( { request, stats, timings }, outputFiles, compileDir, outputDir ) } catch (err) { const { project_id: projectId, user_id: userId } = request logger.err({ projectId, userId, err }, 'failed to save output files') } const outputStage = outputStageTimer.done() timings.sync = syncStage timings.output = outputStage // Emit e2e compile time. timings.compileE2E = timerE2E.done() Metrics.timing('compile-e2e-v2', timings.compileE2E, 1, request.metricsOpts) if (stats['pdf-size']) { emitPdfStats(stats, timings, request) } return { outputFiles, stats, timings } } async function stopCompile(projectId, userId) { const compileName = getCompileName(projectId, userId) await LatexRunner.promises.killLatex(compileName) } async function clearProject(projectId, userId) { const compileDir = getCompileDir(projectId, userId) const exists = await _checkDirectory(compileDir) if (!exists) { // skip removal if no directory present return } try { await execFile('rm', ['-r', '-f', '--', compileDir]) } catch (err) { OError.tag(err, `rm -r failed`, { compileDir, stderr: err.stderr }) throw err } } async function _findAllDirs() { const root = Settings.path.compilesDir const files = await fsPromises.readdir(root) const allDirs = files.map(file => Path.join(root, file)) return allDirs } async function clearExpiredProjects(maxCacheAgeMs) { const now = Date.now() const dirs = await _findAllDirs() for (const dir of dirs) { let stats try { stats = await fsPromises.stat(dir) } catch (err) { // ignore errors checking directory continue } const age = now - stats.mtime const hasExpired = age > maxCacheAgeMs if (hasExpired) { await fse.remove(dir) } } } async function _checkDirectory(compileDir) { let stats try { stats = await fsPromises.lstat(compileDir) } catch (err) { if (err.code === 'ENOENT') { // directory does not exist return false } OError.tag(err, 'error on stat of project directory for removal', { dir: compileDir, }) throw err } if (!stats.isDirectory()) { throw new OError('project directory is not directory', { dir: compileDir, stats, }) } return true } async function syncFromCode( projectId, userId, filename, line, column, imageName ) { // If LaTeX was run in a virtual environment, the file path that synctex expects // might not match the file path on the host. The .synctex.gz file however, will be accessed // wherever it is on the host. const compileName = getCompileName(projectId, userId) const baseDir = Settings.path.synctexBaseDir(compileName) const inputFilePath = Path.join(baseDir, filename) const outputFilePath = Path.join(baseDir, 'output.pdf') const command = [ 'synctex', 'view', '-i', `${line}:${column}:${inputFilePath}`, '-o', outputFilePath, ] const stdout = await _runSynctex(projectId, userId, command, imageName) logger.debug( { projectId, userId, filename, line, column, command, stdout }, 'synctex code output' ) return SynctexOutputParser.parseViewOutput(stdout) } async function syncFromPdf(projectId, userId, page, h, v, imageName) { const compileName = getCompileName(projectId, userId) const baseDir = Settings.path.synctexBaseDir(compileName) const outputFilePath = `${baseDir}/output.pdf` const command = [ 'synctex', 'edit', '-o', `${page}:${h}:${v}:${outputFilePath}`, ] const stdout = await _runSynctex(projectId, userId, command, imageName) logger.debug({ projectId, userId, page, h, v, stdout }, 'synctex pdf output') return SynctexOutputParser.parseEditOutput(stdout, baseDir) } async function _checkFileExists(dir, filename) { try { await fsPromises.stat(dir) } catch (error) { if (error.code === 'ENOENT') { throw new Errors.NotFoundError('no output directory') } throw error } const file = Path.join(dir, filename) let stats try { stats = await fsPromises.stat(file) } catch (error) { if (error.code === 'ENOENT') { throw new Errors.NotFoundError('no output file') } } if (!stats.isFile()) { throw new Error('not a file') } } async function _runSynctex(projectId, userId, command, imageName) { const directory = getCompileDir(projectId, userId) const timeout = 60 * 1000 // increased to allow for large projects const compileName = getCompileName(projectId, userId) const compileGroup = 'synctex' const defaultImageName = Settings.clsi && Settings.clsi.docker && Settings.clsi.docker.image await _checkFileExists(directory, 'output.synctex.gz') try { const output = await CommandRunner.promises.run( compileName, command, directory, imageName || defaultImageName, timeout, {}, compileGroup ) return output.stdout } catch (error) { throw OError.tag(error, 'error running synctex', { command, projectId, userId, }) } } async function wordcount(projectId, userId, filename, image) { logger.debug({ projectId, userId, filename, image }, 'running wordcount') const filePath = `$COMPILE_DIR/${filename}` const command = [ 'texcount', '-nocol', '-inc', filePath, `-out=${filePath}.wc`, ] const compileDir = getCompileDir(projectId, userId) const timeout = 60 * 1000 const compileName = getCompileName(projectId, userId) const compileGroup = 'wordcount' try { await fse.ensureDir(compileDir) } catch (err) { throw OError.tag(err, 'error ensuring dir for wordcount', { projectId, userId, filename, }) } await CommandRunner.promises.run( compileName, command, compileDir, image, timeout, {}, compileGroup ) let stdout try { stdout = await fsPromises.readFile( compileDir + '/' + filename + '.wc', 'utf-8' ) } catch (err) { throw OError.tag(err, 'error reading word count output', { command, compileDir, projectId, userId, }) } const results = _parseWordcountFromOutput(stdout) logger.debug({ projectId, userId, wordcount: results }, 'word count results') return results } function _parseWordcountFromOutput(output) { const results = { encode: '', textWords: 0, headWords: 0, outside: 0, headers: 0, elements: 0, mathInline: 0, mathDisplay: 0, errors: 0, messages: '', } for (const line of output.split('\n')) { const [data, info] = line.split(':') if (data.indexOf('Encoding') > -1) { results.encode = info.trim() } if (data.indexOf('in text') > -1) { results.textWords = parseInt(info, 10) } if (data.indexOf('in head') > -1) { results.headWords = parseInt(info, 10) } if (data.indexOf('outside') > -1) { results.outside = parseInt(info, 10) } if (data.indexOf('of head') > -1) { results.headers = parseInt(info, 10) } if (data.indexOf('Number of floats/tables/figures') > -1) { results.elements = parseInt(info, 10) } if (data.indexOf('Number of math inlines') > -1) { results.mathInline = parseInt(info, 10) } if (data.indexOf('Number of math displayed') > -1) { results.mathDisplay = parseInt(info, 10) } if (data === '(errors') { // errors reported as (errors:123) results.errors = parseInt(info, 10) } if (line.indexOf('!!! ') > -1) { // errors logged as !!! message !!! results.messages += line + '\n' } } return results } module.exports = { doCompileWithLock: callbackify(doCompileWithLock), stopCompile: callbackify(stopCompile), clearProject: callbackify(clearProject), clearExpiredProjects: callbackify(clearExpiredProjects), syncFromCode: callbackify(syncFromCode), syncFromPdf: callbackify(syncFromPdf), wordcount: callbackify(wordcount), promises: { doCompileWithLock, stopCompile, clearProject, clearExpiredProjects, syncFromCode, syncFromPdf, wordcount, }, }