angular-cn/tools/broccoli/broccoli-ts2dart.ts

57 lines
1.8 KiB
TypeScript

/// <reference path="./broccoli-writer.d.ts" />
/// <reference path="../typings/node/node.d.ts" />
/// <reference path="../typings/fs-extra/fs-extra.d.ts" />
import Writer = require('broccoli-writer');
import fs = require('fs');
import fse = require('fs-extra');
import path = require('path');
import ts2dart = require('ts2dart');
type Set = {
[s: string]: boolean
};
class TypeScriptToDartTranspiler extends Writer {
constructor(private inputTree, private includePattern = /\.(js|ts)$/) { super(); }
write(readTree, destDir): Promise<void> {
return readTree(this.inputTree).then(dir => this.transpile(dir, destDir));
}
private transpile(inputDir: string, destDir: string) {
var files = this.listRecursive(inputDir);
var toTranspile = [];
for (var f in files) {
// If it's not matching, don't translate.
if (!f.match(this.includePattern)) continue;
var dartVariant = f.replace(this.includePattern, '.dart');
// A .dart file of the same name takes precedence over transpiled code.
if (files.hasOwnProperty(dartVariant)) continue;
toTranspile.push(f);
}
var transpiler = new ts2dart.Transpiler(
{generateLibraryName: true, generateSourceMap: false, basePath: inputDir});
transpiler.transpile(toTranspile, destDir);
}
private listRecursive(root: string, res: Set = {}): Set {
var paths = fs.readdirSync(root);
paths.forEach((p) => {
p = path.join(root, p);
var stat = fs.statSync(p);
if (stat.isDirectory()) {
this.listRecursive(p, res);
} else {
// Collect *all* files so we can check .dart files that already exist and exclude them.
res[p] = true;
}
});
return res;
}
}
export function transpile(inputTree) {
return new TypeScriptToDartTranspiler(inputTree);
}