[previewctl] Configure shell autocompletion in the workspace image

[ArthurSens]

After spending more time than I'm proud to admit, I decided to give up and open an issue for this.

previewctl shell completion can be configured by running source <(previewctl completion bash), however, it only adds to the current terminal. We should update our workspace image to build previewctl and also add the completion command to ~/.bashrc

[meysholdt]

Maybe this helps to find a solution:
We already have some places where we add completion-config to the ~/.bashrc for exactly the reason you mention:

gitpod/dev/image/Dockerfile

Line 140 in 0f406c4

RUN bash -c "echo . \<\(leeway bash-completion\) >> ~/.bashrc"

gitpod/dev/image/Dockerfile

Line 22 in 0f406c4

&& helm completion bash > /usr/share/bash-completion/completions/helm

[ArthurSens]

The problem is that before this step we need to build the binary from somewhere, that's where I failed 😕