Fixing issue that was writing instead of appending and using async

src/index.js

@@ -6,33 +6,37 @@ import { insertStyle } from './style.js';
 import mkdirp from 'mkdirp';
 
 /**
- * Write to a file even if its directory does not exist
+ * Appends to a file even if its directory does not exist
  * @param {String} path the path of the file write to
  * @param {String} contents contents of file
- * @param {Function} cb callback function when write action finish
  */
-const writeFile = (path, contents, cb) => {
- mkdirp(dirname(path), function (err) {
- if (err && typeof cb === 'function') return cb(err);
+const appendToFile = (path, contents) => {
+ return new Promise((resolve, reject) => {
+ mkdirp(dirname(path), function (err) {
+ if (err) {
+ reject(err)
+ }
 
- fs.writeFile(path, contents, cb);
+ fs.appendFileSync(path, contents)
+ resolve(r);
+ });
  });
 }
 
 let renderSync = (code, option) => {
  return less.render(code, option)
- .then(function(output){
+ .then(function (output) {
  return output.css;
- }, function(error){
+ }, function (error) {
  throw error;
  })
 };
 
 let fileCount = 0;
 
-export default function plugin (options = {}) {
+export default function plugin(options = {}) {
  options.insert = options.insert || false;
- const filter = createFilter(options.include || [ '**/*.less', '**/*.css' ], options.exclude || 'node_modules/**');
+ const filter = createFilter(options.include || ['**/*.less', '**/*.css'], options.exclude || 'node_modules/**');
 
  const injectFnName = '__$styleInject'
  return {
@@ -51,33 +55,35 @@ export default function plugin (options = {}) {
  options.option['filename'] = id;
  options.output = options.output === undefined || options.output === true ? 'rollup.build.css' : options.output;
  if (options.plugins) {
- options.option['plugins'] = options.plugins
+  options.option['plugins'] = options.plugins
  }
 
  let css = await renderSync(code, options.option);
 
- if(options.output&&isFunc(options.output)){
+ if (options.output && isFunc(options.output)) {
  css = await options.output(css, id);
  }
 
- if (options.output&&isString(options.output)) {
- if(fileCount == 1){
+ if (options.output && isString(options.output)) {
+ if (fileCount == 1) {
  //clean the output file
  fs.removeSync(options.output);
  }
- writeFile(options.output, css);
+ await appendToFile(options.output, css);
  }
 
  let exportCode = '';
 
- if(options.insert!=false){
+ if (options.insert != false) {
  exportCode = `export default ${injectFnName}(${JSON.stringify(css.toString())});`;
- }else{
+ } else {
  exportCode = `export default ${JSON.stringify(css.toString())};`;
  }
  return {
  code: exportCode,
- map: { mappings: '' }
+ map: {
+ mappings: ''
+ }
  };
  } catch (error) {
  throw error;
@@ -86,18 +92,18 @@ export default function plugin (options = {}) {
  };
 };
 
-function isString (str) {
- if(typeof str == 'string'){
+function isString(str) {
+ if (typeof str == 'string') {
  return true;
- }else{
+ } else {
  return false;
  }
 }
 
-function isFunc (fn){
- if ( typeof fn == 'function' ){
+function isFunc(fn) {
+ if (typeof fn == 'function') {
  return true;
- }else{
+ } else {
  return false;
  }
-}
+}