如何授予heroku上特定文件夹的权限？

I'm trying to install thelia on heroku, but I've problems with permissions on folders. How can I make chmod in the right way?

Here is our buildpack: https://github.com/fzaffo/heroku-buildpack-php/blob/master/bin/compile

we're getting this result: chmod:

cannot access ‘/app/cache’: No such file or directory (seems it can't find folders in /app)

Here's the test: http://eglaan.herokuapp.com

Thanks for support.

You need to include composer.json and shoot the chmod command from there:

{
  "scripts": {
    "compile": [
      "chmod -R 777 var/",
      "chmod 755 etc/",
      "chmod 644 etc/config.php"
    ]
  }
}