Integrate bash completions into bun completions

[evanwashere]

@evanwashere I think the file I need to edit for installing bash completions is install_completions_command.zig

cc: @Jarred-Sumner

Originally posted by @zombieleet in #403 (comment)

[zombieleet]

I am currently making the necessary changes to the file

[zombieleet]

@evanwashere The zig part has been implemented 😃

[max-programming]

For some reason even after running bun completions it's not working for me

[zombieleet]

@max-programming what issue are you facing with this?

[max-programming]

Sorry @zombieleet I uninstalled Linux now.
Basically, even after running bun completions, the completions didn't work for me

[bluet]

I'm experiencing the same issue.

$ curl -fsSL https://bun.sh/install | bash
##O#-#                                                                        
######################################################################## 100.0%
bun was installed successfully to ~/.bun/bin/bun 

Added "~/.bun/bin" to $PATH in "~/.bashrc" 

To get started, run: 

 source /home/bluet/.bashrc 
  bun --help 
$ source /home/bluet/.bashrc
$ bun --version
0.4.0
$ echo $SHELL
/bin/bash
$ bun completions
error: Could not find a directory to install completions in.
Please either pipe it:
   bun completions > /to/a/file

 Or pass a directory:

   bun completions /my/completions/dir
$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 22.04.1 LTS
Release:	22.04
Codename:	jammy

[mnpenner]

You can trick it with SHELL=bash bun completions /usr/share/bash-completion/completions or SHELL=bash bun completions > /usr/share/bash-completion/completions/bun but I still don't get completions.

[adriangalilea]

I would like to opt-out on the .zshrc modification, I already have the completions elsewhere and when I install bun it adds it regardless.