karma-typescript-cssmodules-transform/dist/transform.js

PostCSS runner plugin for CSS Modules

"use strict";
var log4js = require("log4js");
var os = require("os");
var postcss = require("postcss");
var log;
var json = {};
var parser = postcss.plugin("karma-typescript-cssmodules-transform-parser", function () {
    return function (css) {
        css.walkRules(function (rule) {
            if (rule.selector === ":export") {
                rule.walkDecls(function (decl) {
                    json[decl.prop] = decl.value;
                });
            }
        });
    };
});
// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
var configure = function (postcssOptions, options, filter) {
    postcssOptions = postcssOptions || {};
    options = options || {};
    filter = (filter instanceof RegExp) ? filter : /\.css$/;
    // eslint-disable-next-line @typescript-eslint/no-var-requires
    var genericNames = require("generic-names");
    var scopedNameGenerator = options.generateScopedName || "[name]_[local]_[hash:base64:5]";
    var transform = function (context, callback) {
        postcssOptions.from = context.filename;
        postcssOptions.to = context.filename;
        if (context.filename.match(filter)) {
            log.debug("Transforming %s", context.filename);
            if (!context.source) {
                return callback(new Error("File is empty"), false);
            }
            var plugins = [
                // eslint-disable-next-line @typescript-eslint/no-var-requires
                require("postcss-modules-local-by-default")({ mode: options.mode }),
                require("postcss-modules-extract-imports"),
                // eslint-disable-next-line @typescript-eslint/no-var-requires
                require("postcss-modules-scope")({ generateScopedName: genericNames(scopedNameGenerator, {
                        context: context.filename
                    }) }),
                require("postcss-modules-values"),
                parser
            ];
            postcss(plugins)
                .process(context.source, postcssOptions)
                .then(function (result) {
                result.warnings().forEach(function (warning) {
                    log.warn(warning.toString());
                });
                context.source = JSON.stringify(json);
                callback(undefined, true);
            }, function (error) {
                if (error.name === "CssSyntaxError") {
                    log.warn(error.message + os.EOL + error.showSourceCode());
                    callback(undefined, false);
                }
                else {
                    callback(error, false);
                }
            });
        }
        else {
            return callback(undefined, false);
        }
    };
    var initialize = function (logOptions) {
        log4js.configure({
            appenders: logOptions.appenders,
            categories: {
                default: {
                    appenders: Object.keys(logOptions.appenders),
                    level: logOptions.level
                }
            }
        });
        log = log4js.getLogger("cssmodules-transform.karma-typescript");
    };
    return Object.assign(transform, { initialize: initialize });
};
module.exports = configure;
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