113 lines
3 KiB
JavaScript
113 lines
3 KiB
JavaScript
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#!/usr/bin/env node
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// Simple CLI for KaTeX.
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// Reads TeX from stdin, outputs HTML to stdout.
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// To run this from the repository, you must first build KaTeX by running
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// `yarn` and `yarn build`.
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/* eslint no-console:0 */
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let katex;
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try {
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katex = require("./");
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} catch (e) {
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console.error(
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"KaTeX could not import, likely because dist/katex.js is missing.");
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console.error("Please run 'yarn' and 'yarn build' before running");
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console.error("cli.js from the KaTeX repository.");
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console.error();
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throw e;
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}
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const {version} = require("./package.json");
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const fs = require("fs");
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const program = require("commander").version(version);
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for (const prop in katex.SETTINGS_SCHEMA) {
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if (katex.SETTINGS_SCHEMA.hasOwnProperty(prop)) {
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const opt = katex.SETTINGS_SCHEMA[prop];
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if (opt.cli !== false) {
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program.option(opt.cli || "--" + prop, opt.cliDescription ||
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opt.description, opt.cliProcessor, opt.cliDefault);
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}
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}
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}
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program.option("-f, --macro-file <path>",
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"Read macro definitions, one per line, from the given file.")
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.option("-i, --input <path>", "Read LaTeX input from the given file.")
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.option("-o, --output <path>", "Write html output to the given file.");
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let options;
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function readMacros() {
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if (options.macroFile) {
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fs.readFile(options.macroFile, "utf-8", function(err, data) {
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if (err) {throw err;}
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splitMacros(data.toString().split('\n'));
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});
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} else {
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splitMacros([]);
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}
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}
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function splitMacros(macroStrings) {
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// Override macros from macro file (if any)
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// with macros from command line (if any)
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macroStrings = macroStrings.concat(options.macro);
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const macros = {};
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for (const m of macroStrings) {
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const i = m.search(":");
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if (i !== -1) {
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macros[m.substring(0, i).trim()] = m.substring(i + 1).trim();
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}
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}
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options.macros = macros;
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readInput();
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}
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function readInput() {
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let input = "";
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if (options.input) {
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fs.readFile(options.input, "utf-8", function(err, data) {
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if (err) {throw err;}
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input = data.toString();
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writeOutput(input);
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});
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} else {
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process.stdin.on("data", function(chunk) {
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input += chunk.toString();
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});
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process.stdin.on("end", function() {
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writeOutput(input);
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});
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}
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}
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function writeOutput(input) {
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// --format specifies the KaTeX output
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const outputFile = options.output;
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options.output = options.format;
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const output = katex.renderToString(input, options) + "\n";
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if (outputFile) {
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fs.writeFile(outputFile, output, function(err) {
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if (err) {
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return console.log(err);
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}
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});
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} else {
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console.log(output);
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}
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}
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if (require.main !== module) {
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module.exports = program;
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} else {
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options = program.parse(process.argv).opts();
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readMacros();
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}
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