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