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scss-processor.js
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scss-processor.js
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import path from 'path';
import fs from 'fs';
import IncludedFile from './included-file';
import ImportPathHelpers from './helpers/import-path-helpers';
import logger from './logger';
export default class ScssProcessor {
constructor(pluginOptions) {
this.fileCache = {};
this.filesByName = null;
this.pluginOptions = pluginOptions;
this.sass = pluginOptions.enableSassCompilation ? require('node-sass') : null;
}
isRoot(inputFile) {
const fileOptions = inputFile.getFileOptions();
if (fileOptions.hasOwnProperty('isImport')) {
return !fileOptions.isImport;
}
return !hasUnderscore(inputFile.getPathInPackage());
function hasUnderscore(file) {
return path.basename(file)[0] === '_';
}
}
shouldProcess(file) {
return isScssFile.call(this, file);
function isScssFile(file) {
if (!this.pluginOptions.enableSassCompilation || typeof this.pluginOptions.enableSassCompilation === 'boolean') {
return this.pluginOptions.enableSassCompilation;
}
const extension = path.extname(file.getPathInPackage()).substring(1);
return this.pluginOptions.enableSassCompilation.indexOf(extension) !== -1;
}
}
process(file, filesByName) {
this.filesByName = filesByName;
try {
this._process(file);
} catch (err) {
const numberOfAdditionalLines = this.pluginOptions.globalVariablesTextLineCount
? this.pluginOptions.globalVariablesTextLineCount + 1
: 0;
const adjustedLineNumber = err.line - numberOfAdditionalLines;
logger.error(`\n/~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`);
logger.error(`Processing Step: SCSS compilation`);
logger.error(`Unable to compile ${file.importPath}\nLine: ${adjustedLineNumber}, Column: ${err.column}\n${err}`);
logger.error(`\n/~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`);
throw err;
}
}
_process(file) {
if (file.isPreprocessed) return;
const sourceFile = this._wrapFileForNodeSass(file);
const { css, sourceMap } = this._transpile(sourceFile);
file.contents = css;
file.sourceMap = sourceMap;
file.isPreprocessed = true;
}
_wrapFileForNodeSass(file) {
return { path: file.importPath, contents: file.rawContents, file: file };
}
_discoverImportPath(importPath) {
const potentialPaths = [importPath];
const potentialFileExtensions = this.pluginOptions.enableSassCompilation === true ? this.pluginOptions.extensions : this.pluginOptions.enableSassCompilation;
if (!path.extname(importPath)) {
potentialFileExtensions.forEach(extension => potentialPaths.push(`${importPath}.${extension}`));
}
if (path.basename(importPath)[0] !== '_') {
[].concat(potentialPaths).forEach(potentialPath => potentialPaths.push(`${path.dirname(potentialPath)}/_${path.basename(potentialPath)}`));
}
for (let i = 0, potentialPath = potentialPaths[i]; i < potentialPaths.length; i++, potentialPath = potentialPaths[i]) {
if (this.filesByName.has(potentialPath) || (fs.existsSync(potentialPaths[i]) && fs.lstatSync(potentialPaths[i]).isFile())) {
return potentialPath;
}
}
throw new Error(`File '${importPath}' not found at any of the following paths: ${JSON.stringify(potentialPaths)}`);
}
_transpile(sourceFile) {
const sassOptions = {
sourceMap: true,
sourceMapContents: true,
sourceMapEmbed: false,
sourceComments: false,
sourceMapRoot: '.',
indentedSyntax: sourceFile.file.getExtension() === 'sass',
outFile: `.${sourceFile.file.getBasename()}`,
importer: this._importFile.bind(this, sourceFile),
includePaths: [],
file: sourceFile.path,
data: sourceFile.contents
};
/* Empty options.data workaround from fourseven:scss */
if (!sassOptions.data.trim()) {
sassOptions.data = '$fakevariable : blue;';
}
const output = this.sass.renderSync(sassOptions);
return { css: output.css.toString('utf-8'), sourceMap: JSON.parse(output.map.toString('utf-8')) };
}
_importFile(rootFile, sourceFilePath, relativeTo) {
let importPath = ImportPathHelpers.getImportPathRelativeToFile(sourceFilePath, relativeTo);
importPath = this._discoverImportPath(importPath);
let inputFile = this.filesByName.get(importPath);
if (inputFile) {
rootFile.file.referencedImportPaths.push(importPath);
} else {
this._createIncludedFile(importPath, rootFile);
}
return this._wrapFileForNodeSassImport(inputFile);
}
_createIncludedFile(importPath, rootFile) {
const file = new IncludedFile(importPath, rootFile);
file.prepInputFile().await();
this.filesByName.set(importPath, file);
}
_wrapFileForNodeSassImport(file) {
return { contents: file.rawContents, file: file.importPath };
}
};