plotly.js/tasks/preprocess.js

The open source javascript graphing library that powers plotly

var fs = require('fs-extra');
var path = require('path');
var sass = require('sass');

var constants = require('./util/constants');
var mapBoxGLStyleRules = require('./../src/plots/mapbox/constants').styleRules;
var common = require('./util/common');
var pullCSS = require('./util/pull_css');
var updateVersion = require('./util/update_version');

// main
makeBuildCSS();
exposePartsInLib();
copyTopojsonFiles();
updateVersion(constants.pathToPlotlyVersion);

// convert scss to css to js and static css file
function makeBuildCSS() {
    sass.render(
        {
            file: constants.pathToSCSS,
            outputStyle: 'compressed'
        },
        function (err, result) {
            if (err) throw err;

            // To support application with strict CSP where styles cannot be inlined,
            // build a static CSS file that can be included into such applications.
            var staticCSS = String(result.css);
            for (var k in mapBoxGLStyleRules) {
                staticCSS = addAdditionalCSSRules(
                    staticCSS,
                    '.js-plotly-plot .plotly .mapboxgl-' + k,
                    mapBoxGLStyleRules[k]
                );
            }
            fs.writeFile(constants.pathToCSSDist, staticCSS, function (err) {
                if (err) throw err;
            });

            // css to js to be inlined
            pullCSS(String(result.css), constants.pathToCSSBuild);
        }
    );
}

function addAdditionalCSSRules(staticStyleString, selector, style) {
    return staticStyleString + selector + '{' + style + '}';
}

function exposePartsInLib() {
    var obj = {};

    var insert = function (name, folder) {
        obj[name] = folder + '/' + name;
    };

    insert('core', 'src');

    insert('calendars', 'src/components');

    constants.allTraces.forEach(function (k) {
        insert(k, 'src/traces');
    });

    writeLibFiles(obj);
}

function writeLibFiles(obj) {
    for (var name in obj) {
        common.writeFile(
            path.join(constants.pathToLib, name + '.js'),
            ["'use strict';", '', "module.exports = require('../" + obj[name] + "');", ''].join('\n')
        );
    }
}

function copyTopojsonFiles() {
    const FILES_TO_EXCLUDE = ['country_names_iso_codes.json'];
    fs.copy(
        constants.pathToTopojsonSrc,
        constants.pathToTopojsonDist,
        {
            clobber: true,
            filter: (filePath) => !FILES_TO_EXCLUDE.includes(path.basename(filePath))
        },
        common.throwOnError
    );
}