overleaf/services/web/frontend/js/ide/log-parser/latex-log-parser.js

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// Define some constants
const LOG_WRAP_LIMIT = 79
const LATEX_WARNING_REGEX = /^LaTeX(?:3| Font)? Warning: (.*)$/
const HBOX_WARNING_REGEX = /^(Over|Under)full \\(v|h)box/
const PACKAGE_WARNING_REGEX = /^((?:Package|Class|Module) \b.+\b Warning:.*)$/
// This is used to parse the line number from common latex warnings
const LINES_REGEX = /lines? ([0-9]+)/
// This is used to parse the package name from the package warnings
const PACKAGE_REGEX = /^(?:Package|Class|Module) (\b.+\b) Warning/
const FILE_LINE_ERROR_REGEX = /^([./].*):(\d+): (.*)/
const STATE = {
NORMAL: 0,
ERROR: 1,
}
export default class LatexParser {
constructor(text, options = {}) {
this.state = STATE.NORMAL
this.fileBaseNames = options.fileBaseNames || [/compiles/, /\/usr\/local/]
this.ignoreDuplicates = options.ignoreDuplicates
this.data = []
this.fileStack = []
this.currentFileList = this.rootFileList = []
this.openParens = 0
this.latexWarningRegex = LATEX_WARNING_REGEX
this.packageWarningRegex = PACKAGE_WARNING_REGEX
this.packageRegex = PACKAGE_REGEX
this.log = new LogText(text)
}
parse() {
while ((this.currentLine = this.log.nextLine()) !== false) {
if (this.state === STATE.NORMAL) {
if (this.currentLineIsError()) {
this.state = STATE.ERROR
this.currentError = {
line: null,
file: this.currentFilePath,
level: 'error',
message: this.currentLine.slice(2),
content: '',
raw: this.currentLine + '\n',
}
} else if (this.currentLineIsFileLineError()) {
this.state = STATE.ERROR
this.parseFileLineError()
} else if (this.currentLineIsRunawayArgument()) {
this.parseRunawayArgumentError()
} else if (this.currentLineIsWarning()) {
this.parseSingleWarningLine(this.latexWarningRegex)
} else if (this.currentLineIsHboxWarning()) {
this.parseHboxLine()
} else if (this.currentLineIsPackageWarning()) {
this.parseMultipleWarningLine()
} else {
this.parseParensForFilenames()
}
}
if (this.state === STATE.ERROR) {
this.currentError.content += this.log
.linesUpToNextMatchingLine(/^l\.[0-9]+/)
.join('\n')
this.currentError.content += '\n'
this.currentError.content += this.log
.linesUpToNextWhitespaceLine(true)
.join('\n')
this.currentError.content += '\n'
this.currentError.content += this.log
.linesUpToNextWhitespaceLine(true)
.join('\n')
this.currentError.raw += this.currentError.content
const lineNo = this.currentError.raw.match(/l\.([0-9]+)/)
if (lineNo && this.currentError.line === null) {
this.currentError.line = parseInt(lineNo[1], 10)
}
this.data.push(this.currentError)
this.state = STATE.NORMAL
}
}
return this.postProcess(this.data)
}
currentLineIsError() {
return (
this.currentLine[0] === '!' &&
this.currentLine !==
'! ==> Fatal error occurred, no output PDF file produced!'
)
}
currentLineIsFileLineError() {
return FILE_LINE_ERROR_REGEX.test(this.currentLine)
}
currentLineIsRunawayArgument() {
return this.currentLine.match(/^Runaway argument/)
}
currentLineIsWarning() {
return !!this.currentLine.match(this.latexWarningRegex)
}
currentLineIsPackageWarning() {
return !!this.currentLine.match(this.packageWarningRegex)
}
currentLineIsHboxWarning() {
return !!this.currentLine.match(HBOX_WARNING_REGEX)
}
parseFileLineError() {
const result = this.currentLine.match(FILE_LINE_ERROR_REGEX)
this.currentError = {
line: result[2],
file: result[1],
level: 'error',
message: result[3],
content: '',
raw: this.currentLine + '\n',
}
}
parseRunawayArgumentError() {
this.currentError = {
line: null,
file: this.currentFilePath,
level: 'error',
message: this.currentLine,
content: '',
raw: this.currentLine + '\n',
}
this.currentError.content += this.log
.linesUpToNextWhitespaceLine()
.join('\n')
this.currentError.content += '\n'
this.currentError.content += this.log
.linesUpToNextWhitespaceLine()
.join('\n')
this.currentError.raw += this.currentError.content
const lineNo = this.currentError.raw.match(/l\.([0-9]+)/)
if (lineNo) {
this.currentError.line = parseInt(lineNo[1], 10)
}
return this.data.push(this.currentError)
}
parseSingleWarningLine(prefixRegex) {
const warningMatch = this.currentLine.match(prefixRegex)
if (!warningMatch) {
return
}
const warning = warningMatch[1]
const lineMatch = warning.match(LINES_REGEX)
const line = lineMatch ? parseInt(lineMatch[1], 10) : null
this.data.push({
line,
file: this.currentFilePath,
level: 'warning',
message: warning,
raw: warning,
})
}
parseMultipleWarningLine() {
// Some package warnings are multiple lines, let's parse the first line
let warningMatch = this.currentLine.match(this.packageWarningRegex)
// Something strange happened, return early
if (!warningMatch) {
return
}
const warningLines = [warningMatch[1]]
let lineMatch = this.currentLine.match(LINES_REGEX)
let line = lineMatch ? parseInt(lineMatch[1], 10) : null
const packageMatch = this.currentLine.match(this.packageRegex)
const packageName = packageMatch[1]
// Regex to get rid of the unnecesary (packagename) prefix in most multi-line warnings
const prefixRegex = new RegExp(
'(?:\\(' + packageName + '\\))*[\\s]*(.*)',
'i'
)
// After every warning message there's a blank line, let's use it
while ((this.currentLine = this.log.nextLine())) {
lineMatch = this.currentLine.match(LINES_REGEX)
line = lineMatch ? parseInt(lineMatch[1], 10) : line
warningMatch = this.currentLine.match(prefixRegex)
warningLines.push(warningMatch[1])
}
const rawMessage = warningLines.join(' ')
this.data.push({
line,
file: this.currentFilePath,
level: 'warning',
message: rawMessage,
raw: rawMessage,
})
}
parseHboxLine() {
const lineMatch = this.currentLine.match(LINES_REGEX)
const line = lineMatch ? parseInt(lineMatch[1], 10) : null
this.data.push({
line,
file: this.currentFilePath,
level: 'typesetting',
message: this.currentLine,
raw: this.currentLine,
})
}
// Check if we're entering or leaving a new file in this line
parseParensForFilenames() {
const pos = this.currentLine.search(/[()]/)
if (pos !== -1) {
const token = this.currentLine[pos]
this.currentLine = this.currentLine.slice(pos + 1)
if (token === '(') {
const filePath = this.consumeFilePath()
if (filePath) {
this.currentFilePath = filePath
const newFile = {
path: filePath,
files: [],
}
this.fileStack.push(newFile)
this.currentFileList.push(newFile)
this.currentFileList = newFile.files
} else {
this.openParens++
}
} else if (token === ')') {
if (this.openParens > 0) {
this.openParens--
} else {
if (this.fileStack.length > 1) {
this.fileStack.pop()
const previousFile = this.fileStack[this.fileStack.length - 1]
this.currentFilePath = previousFile.path
this.currentFileList = previousFile.files
}
}
}
// else {
// Something has gone wrong but all we can do now is ignore it :(
// }
// Process the rest of the line
this.parseParensForFilenames()
}
}
consumeFilePath() {
// Our heuristic for detecting file names are rather crude
// To contain a file path this line must have at least one / before any '(', ')' or '\'
if (!this.currentLine.match(/^\/?([^ ()\\]+\/)+/)) {
return false
}
// A file may not contain a '(', ')' or '\'
let endOfFilePath = this.currentLine.search(/[ ()\\]/)
// handle the case where there is a space in a filename
while (endOfFilePath !== -1 && this.currentLine[endOfFilePath] === ' ') {
const partialPath = this.currentLine.slice(0, endOfFilePath)
// consider the file matching done if the space is preceded by a file extension (e.g. ".tex")
if (/\.\w+$/.test(partialPath)) {
break
}
// advance to next space or ) or end of line
const remainingPath = this.currentLine.slice(endOfFilePath + 1)
// consider file matching done if current path is followed by any of "()[]
if (/^\s*["()[\]]/.test(remainingPath)) {
break
}
const nextEndOfPath = remainingPath.search(/[ "()[\]]/)
if (nextEndOfPath === -1) {
endOfFilePath = -1
} else {
endOfFilePath += nextEndOfPath + 1
}
}
let path
if (endOfFilePath === -1) {
path = this.currentLine
this.currentLine = ''
} else {
path = this.currentLine.slice(0, endOfFilePath)
this.currentLine = this.currentLine.slice(endOfFilePath)
}
return path
}
postProcess(data) {
const all = []
const errorsByLevel = {
error: [],
warning: [],
typesetting: [],
}
const hashes = new Set()
const hashEntry = entry => entry.raw
data.forEach(item => {
const hash = hashEntry(item)
if (this.ignoreDuplicates && hashes.has(hash)) {
return
}
errorsByLevel[item.level]?.push(item)
all.push(item)
hashes.add(hash)
})
return {
errors: errorsByLevel.error,
warnings: errorsByLevel.warning,
typesetting: errorsByLevel.typesetting,
all,
files: this.rootFileList,
}
}
}
class LogText {
constructor(text) {
this.text = text.replace(/(\r\n)|\r/g, '\n')
// Join any lines which look like they have wrapped.
const wrappedLines = this.text.split('\n')
this.lines = [wrappedLines[0]]
for (let i = 1; i < wrappedLines.length; i++) {
// If the previous line is as long as the wrap limit then
// append this line to it.
// Some lines end with ... when LaTeX knows it's hit the limit
// These shouldn't be wrapped.
// If the next line looks like it could be an error (i.e. start with a !),
// do not unwrap the line.
const prevLine = wrappedLines[i - 1]
const currentLine = wrappedLines[i]
if (
prevLine.length === LOG_WRAP_LIMIT &&
prevLine.slice(-3) !== '...' &&
currentLine.charAt(0) !== '!'
) {
this.lines[this.lines.length - 1] += currentLine
} else {
this.lines.push(currentLine)
}
}
this.row = 0
}
nextLine() {
this.row++
if (this.row >= this.lines.length) {
return false
} else {
return this.lines[this.row]
}
}
rewindLine() {
this.row--
}
linesUpToNextWhitespaceLine(stopAtError) {
return this.linesUpToNextMatchingLine(/^ *$/, stopAtError)
}
linesUpToNextMatchingLine(match, stopAtError) {
const lines = []
while (true) {
const nextLine = this.nextLine()
if (nextLine === false) {
break
}
if (stopAtError && nextLine.match(/^! /)) {
this.rewindLine()
break
}
lines.push(nextLine)
if (nextLine.match(match)) {
break
}
}
return lines
}
}