vscode extension获取当前git分支

const fs = require('fs');

// 获取当前工作目录
let projectRoot=vscode.workspace.workspaceFolders[0].uri.fsPath
// 读取.git/HEAD文件，处理分支信息
fs.readFile(projectRoot+"/.git/HEAD",(err,data)=>{
	if (err!=null){
		vscode.window.showInformationMessage(err.message);
	}else{
                // ref: refs/heads/master => master
		let currentBranchdata= data.toString().replace("ref: refs/heads/","")
		console.log(currentBranchdata) // => master
	}
})