angular-cn/tools/broccoli/broccoli-replace.ts

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import fs = require('fs');
import fse = require('fs-extra');
import path = require('path');
import {wrapDiffingPlugin, DiffingBroccoliPlugin, DiffResult} from './diffing-broccoli-plugin';
var minimatch = require('minimatch');
var FILE_ENCODING = {encoding: 'utf-8'};
/**
* Intercepts each changed file and replaces its contents with
* the associated changes.
*/
class DiffingReplace implements DiffingBroccoliPlugin {
// TODO: define an interface for options
constructor(private inputPath: string, private cachePath: string, private options: any) {}
rebuild(treeDiff: DiffResult) {
var patterns = this.options.patterns;
var files = this.options.files;
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treeDiff.addedPaths.concat(treeDiff.changedPaths).forEach((changedFilePath) => {
var sourceFilePath = path.join(this.inputPath, changedFilePath);
var destFilePath = path.join(this.cachePath, changedFilePath);
var destDirPath = path.dirname(destFilePath);
if (!fs.existsSync(destDirPath)) {
fse.mkdirpSync(destDirPath);
}
var fileMatches = files.some((filePath: string) => minimatch(changedFilePath, filePath));
if (fileMatches) {
var content = fs.readFileSync(sourceFilePath, FILE_ENCODING);
patterns.forEach((pattern: any) => {
var replacement = pattern.replacement;
if (typeof replacement === 'function') {
replacement = function(content: string) {
return pattern.replacement(content, changedFilePath);
};
}
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content = content.replace(pattern.match, replacement);
});
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fs.writeFileSync(destFilePath, content, FILE_ENCODING);
} else if (!fs.existsSync(destFilePath)) {
try {
fs.symlinkSync(sourceFilePath, destFilePath);
} catch (e) {
fs.writeFileSync(destFilePath, fs.readFileSync(sourceFilePath));
}
}
});
treeDiff.removedPaths.forEach((removedFilePath) => {
var destFilePath = path.join(this.cachePath, removedFilePath);
fs.unlinkSync(destFilePath);
});
}
}
export default wrapDiffingPlugin(DiffingReplace);