change default shell to fish

[iaacornus]

• [ ] install fish
• [ ] change default shell to fish

[boredsquirrel]

This should be optional. What are the advantages for you?

[iaacornus]

This should be optional. What are the advantages for you?

yes, it's optional, users can agree with the prompt and change it or not

[boredsquirrel]

1. add fish to rpm-ostree command

2. add this to reboot command

mkdir -p ~/.config/fish
touch ~/.config/fish/config.fish
echo 'set fish_greeting ""' >> ~/.config/fish/config.fish
cat ~/.bashrc >> ~/.config/fish/config.fish

# correct bash commands
sed -i 's/PATH=/set PATH /g' ~/.config/fish/config.fish

# removed, breaks SDDM !
# sudo lchsh $USER /usr/bin/fish

# Konsole profile

printf """[General]
Command=/usr/bin/fish
Icon=bluefish
Name=Fish
Parent=FALLBACK/""" > ~/.local/share/konsole/Fish.profile

# Gnome terminal profile

xdg-open https://fishshell.com/docs/current/fish_for_bash_users.html#fish-for-bash-users

The Konsole profile uses the Bluefish icon, which I find is the only nice icon available, if it is not existent there is none, which is also no problem. You have to configure the fish profile as the default somewhere

How to do this in Gnome terminal? Also there is a new one, right? I would include both.

Also found out Fedora uses a different command for changing the shell, possibly to avoid security flaws, so it needs sudo.

Problems

Replacing Fish as default shell is not recommended, some reported it breaks login!

Also if a shell script lacks the #!/bin/sh or #!/bin/bash it may not run!

I dont know currently how to load another script containing aliases, this is really useful using the bash alias project

The PATH command is different in fish, but this can be replaced easily.

Some other preconfigured bash commands may give problems, copying the complete config should be a choice.

[boredsquirrel]

maybe create a seperate fish appstarter

printf """[Desktop Entry]
Name=Fish Shell
Exec=fish
Icon=utilities-terminal
Terminal=true
Type=Application""" > ~/.local/share/applications/fish.desktop

[boredsquirrel]

another question is how to remove this huge shell "username" (?):

user@fedora /v/h/u/.c/fish> 

[boredsquirrel]

fish shell now needs another way to add the paths to $PATH

• ~/.cargo/bin
• ~/.local/bin
• ~/.bin

Some dude made some commands to make this easy

# addpaths
function addpaths
    contains -- $argv $fish_user_paths
       or set -U fish_user_paths $fish_user_paths $argv
    echo "Updated PATH: $PATH"
end

# removepaths
function removepath
    if set -l index (contains -i $argv[1] $PATH)
        set --erase --universal fish_user_paths[$index]
        echo "Updated PATH: $PATH"
    else
        echo "$argv[1] not found in PATH: $PATH"
    end
end

# make functions autoloading
funcsave addpaths; funcsave removepath

# use
addpaths ~/.cargo/bin ~/.local/bin ~/.bin

[boredsquirrel]

EDIT: No you should not! automatically exiting bash may cause lots of programs to misbehave, while you really only want fish for its usability.

you could also just change to fish via

echo "fish" >> ~/.bashrc

a more extreme way would be changing the shell permanently

sudo usermod -s /usr/bin/fish $USER

[boredsquirrel]

unsure. Some people said it doesnt do anything unexpected, some others say it breaks the system. I would just keep fish as the shell for the Terminal app, and use good old bash for everything else. Fish is pretty nice!

[boredsquirrel]

PROBLEM:

Distrobox using Fedora doesnt work if fish is not installed. Some script detecting if a distrobox using fedora exists and installing fish there is needed.

distrobox list | grep registry.fedoraproject.org && distrobox-enter -- sudo dnf install -y fish

Problems here:

• the default distrobox uses Fedora 36, so this is the one working here. If you use another version, it will try to generate a new one
• If you have more than one Fedora distrobox, this doesnt work
• This again needs two commands for Toolbox and distrobox
• No idea currently how to get the names of the boxes and iterating through all of them

my boxes look like this:

077f55158c2e | fedora               | Up 8 minutes                   | registry.fedoraproject.org/fedora-toolbox:37
ec27f1092d84 | fedora-blank         | Exited (143) 7 days ago        | registry.fedoraproject.org/fedora-toolbox:37

SOLUTION: ask for user input of the boxes name, if empty the default F36 one will be chosen.

in bash:

read -p "You need to install fish in your Fedora distrobox. How is it called? (leave blank if no name) " bname
distrobox list | grep registry.fedoraproject.org && distrobox-enter $bname -- sudo dnf install -y fish

[boredsquirrel]

So I did some tests. Fish is really nice, and having is as default shell doesnt break SDDM or Wayland.

Interstingly, changing the usershell to /usr/bin/bash breaks Wayland, X11 stays intact for most parts. Tried to revert it back and it broke.

So to be secure I would not replace the user shell, especially not the root shell. But it seems to be possible.

[john-ghatas]

The root shell should not be modified, this should be optional anyway since shells are a user preference kinda thing.

[boredsquirrel]

Yes agreed. Do you know if there are Gnome terminal profiles? On KDE I dont have to change any shell, just create a new profile using fish and set that as default.

The alternative would be to have an Appstarter opening fish and set that to Ctrl+Alt+T

[john-ghatas]

Yes gnome supports profiles

[boredsquirrel]

nice! Would you like to create a config file we can automatically print somewhere, so that users just have to select the profile? Maybe even set the profile as default?

[john-ghatas]

Sure that would only be a custom command to invoke fish then right?

[john-ghatas]

I found the following link to dump and save Gnome terminal profiles

[john-ghatas]

Created the following config file

> dconf dump /org/gnome/terminal/legacy/profiles:/
[/]
list=['b1dcc9dd-5262-4d8d-a863-c897e6d979b9']

[:b1dcc9dd-5262-4d8d-a863-c897e6d979b9]
use-custom-command=false

[legacy/profiles:]
list=['8844b46f-4827-4106-9afb-77fcf76521fa']

[legacy/profiles:/:8844b46f-4827-4106-9afb-77fcf76521fa]
custom-command='fish'
use-custom-command=true
visible-name='fish'

Then load that config

[...]

Used https://gist.github.com/fdaciuk/9ec4d8afc32063a6f74a21f8308e3807

[john-ghatas]

Managed to export the configuration but I can't find any working example on how to import it