Update the parsed object and generate an updated Dockerfile

[AntoninSlejska]

I need to edit Dockerfiles in a Javascript application. This library enables to parse the Dockerfiles, but I do not know, how to update the arguments.

E.g. I can get the argument for the 'FROM' instruction:

for (let instruction of instructions) {
  if (instruction.getInstruction() === 'FROM') {
    console.log(instruction.getArgumentsContent());   // 'ubuntu'
  }
}

How can I change the instruction 'FROM ubuntu' to 'FROM debian'?

And will then the method 'dockerfile.document.getText()' return the updated Dockerfile or the original? I need to be able to generate an updated Dockerfile.

Thanks.

[rcjsuen]

Hi, @AntoninSlejska. Thank you for your interest in this project.

Unfortunately, this project only parses Dockerfiles at the moment. It is not possible to alter the contents of the parsed Dockerfile.