angular-cn/tools/broccoli/diffing-broccoli-plugin.ts

110 lines
2.8 KiB
TypeScript

/// <reference path="broccoli.d.ts" />
/// <reference path="../typings/fs-extra/fs-extra.d.ts" />
/// <reference path="../typings/node/node.d.ts" />
import fs = require('fs');
import fse = require('fs-extra');
import path = require('path');
import {TreeDiffer, DiffResult} from './tree-differ';
let symlinkOrCopy = require('symlink-or-copy');
export {DiffResult} from './tree-differ';
/**
* Makes writing diffing plugins easy.
*
* Factory method that takes a class that implements the DiffingBroccoliPlugin interface and returns
* an instance of BroccoliTree.
*
* @param pluginClass
* @returns {DiffingPlugin}
*/
export function wrapDiffingPlugin(pluginClass): DiffingPluginWrapperFactory {
return function() { return new DiffingPluginWrapper(pluginClass, arguments); };
}
export interface DiffingBroccoliPlugin {
rebuild(diff: DiffResult): (Promise<any>| void);
cleanup ? () : void;
}
type DiffingPluginWrapperFactory = (inputTrees: (BroccoliTree | BroccoliTree[]), options?) =>
BroccoliTree;
class DiffingPluginWrapper implements BroccoliTree {
treeDiffer: TreeDiffer;
initialized = false;
wrappedPlugin: DiffingBroccoliPlugin = null;
inputTree = null;
inputTrees = null;
description = null;
// props monkey-patched by broccoli builder:
inputPath = null;
cachePath = null;
outputPath = null;
constructor(private pluginClass, private wrappedPluginArguments) {
if (Array.isArray(wrappedPluginArguments[0])) {
this.inputTrees = wrappedPluginArguments[0];
} else {
this.inputTree = wrappedPluginArguments[0];
}
this.description = this.pluginClass.name;
}
rebuild() {
try {
let firstRun = !this.initialized;
this.init();
let diffResult = this.treeDiffer.diffTree();
diffResult.log(!firstRun);
var rebuildPromise = this.wrappedPlugin.rebuild(diffResult);
if (rebuildPromise) {
return (<Promise<any>>rebuildPromise).then(this.relinkOutputAndCachePaths.bind(this));
}
this.relinkOutputAndCachePaths();
} catch (e) {
e.message = `[${this.description}]: ${e.message}`;
throw e;
}
}
private relinkOutputAndCachePaths() {
// just symlink the cache and output tree
fs.rmdirSync(this.outputPath);
symlinkOrCopy.sync(this.cachePath, this.outputPath);
}
private init() {
if (!this.initialized) {
let includeExtensions = this.pluginClass.includeExtensions || [];
let excludeExtensions = this.pluginClass.excludeExtensions || [];
this.initialized = true;
this.treeDiffer = new TreeDiffer(this.inputPath, includeExtensions, excludeExtensions);
this.wrappedPlugin =
new this.pluginClass(this.inputPath, this.cachePath, this.wrappedPluginArguments[1]);
}
}
cleanup() {
if (this.wrappedPlugin.cleanup) {
this.wrappedPlugin.cleanup();
}
}
}