Docker number of lines in terminal changing inside docker

Question

I would like to know how to change the following behavior. Let\'s say my terminal has 28 lines. Then I use the following commands:

$ tput li         


        

Answer 1

UPDATE

you can now install goinside command line tool with:

sudo npm install -g goinside

and go inside a docker container with a proper terminal size with:

goinside docker_container_name

---

Logic behind goinside

thanks to @VonC answer we've got a solution for this problem with a simple bash snippet that we put in ~/.profile:

goinside(){
    docker exec -it $1 bash -c "stty cols $COLUMNS rows $LINES && bash";
}
export -f goinside

now you are able to get inside a docker container without terminal size issues with:

$ goinside containername

---

remember to source ~/.profile before using the goinside function.

---

enabling autocompletion in bash

(as it's shared in one of comments below) if you want to enable autocompletion for goinside you can use this snippet in .profile:

goinside(){
    docker exec -it $1 bash -c "stty cols $COLUMNS rows $LINES && bash";
}
_goinside(){
    COMPREPLY=( $(docker ps --format "{{.Names}}" -f name=$2) );
}
complete -F _goinside goinside;
export -f goinside;

---

enabling autocompletion in zsh

if you are using zsh as your default terminal you can use this snippet inside your ~/.zshrc file:

autoload bashcompinit
bashcompinit
goinside(){
    docker exec -it $1 bash -c "stty cols $COLUMNS rows $LINES && bash";
}
_goinside(){
    COMPREPLY=( $(docker ps --format "{{.Names}}" -f name=$2) );
}
complete -F _goinside goinside;
export goinside;