implement Linux docker launcher

[stebourbi]

On linux docker needs root user abilitation to run commands and this is an issue in a context of an sbt build. I have not found any statisfying solution to resolve that but only some workarounds. And I think that we should implement all of the available workarounds and let the user decide which one to implement.
Here are the workarounds that i have found:

• prompt for sudo password each time a command is launched
• add the current user to the docker group
• pass the sudo password to the commands via a configuration (system conf or a file)
• generate a script that runs the commands and define it as passwordless in sudo configuration

there are probably bettter solutions but that's what i have found actually!

[sjeandeaux]

Question and potentials actions by workarounds :

I order workaround by prefered implementation.

##add the current user to the docker group

• Detect if user is in group docker
• Modify scala code add LinuxDocker without sudo
• Create page wiki to indicate how add user in groud docker

##pass the sudo password to the commands via a configuration (system conf or a file)

• Modify scala to read this file
• What is localisation of file (~/.sbt-docker-launcher or ...)?

##prompt for sudo password each time a command is launched

• Modify scala code to integrate a prompt

##generate a script that runs the commands and define it as passwordless in sudo configuration

• when do you run this commands?

[stebourbi]

I agree with that. Let's start implementation. And will see the result.

[stebourbi]

I mean start with the first one 😬

[sjeandeaux]

i keep "prompt solution" before i create a Dockerfile with docker on.