fish
fish is the Friendly Interactive Shell.
Setting fish as the default shell
See Command Shell#Changing default shell.
Managing fish plugins with Home Manager
In order to manage fish with home manager you also have to enable it in your home.nix
.
Then you can add new ones by adding them to the list of submodules of programs.fish.plugins
.
Manual
So for example for the plugin z
from jethrokuan on github.
programs.fish.enable = true;
programs.fish.plugins = [{
name = "z";
src = pkgs.fetchFromGitHub {
owner = "jethrokuan";
repo = "z";
rev = "e0e1b9dfdba362f8ab1ae8c1afc7ccf62b89f7eb";
sha256 = "0dbnir6jbwjpjalz14snzd3cgdysgcs3raznsijd6savad3qhijc";
};
}];
nixpkgs
Or you can use some of the packaged plugins, by just adding them to your installed packages (or with nix-env)
Useful scripts
Show that you are in a nix-shell
Add this to the fish_prompt
function (usually placed in ~/.config/fish/functions/fish_prompt.fish
):
set -l nix_shell_info (
if test -n "$IN_NIX_SHELL"
echo -n "<nix-shell> "
end
)
and $nix_shell_info
to the echo in that function, e.g.:
echo -n -s "$nix_shell_info ~>"
Now your prompt looks like this
- outside:
~>
- inside:
<nix-shell> ~>
btw. you can directly start nix-shell in fish with nix-shell --run fish
, but (FIXME) the normal build functions are not available there.
Environments
Helper functions that put you in a nix-shell with the given packages installed.
You can either put these in programs.fish.functions
with home-manager or in ~/.config/fish/functions/fish_prompt.fish
without.
haskellEnv
function haskellEnv
nix-shell -p "haskellPackages.ghcWithPackages (pkgs: with pkgs; [ $argv ])"
end
# Invocation: haskellEnv package1 packages2 .. packageN
pythonEnv
function pythonEnv --description 'start a nix-shell with the given python packages' --argument pythonVersion
if set -q argv[2]
set argv $argv[2..-1]
end
for el in $argv
set ppkgs $ppkgs "python"$pythonVersion"Packages.$el"
end
nix-shell -p $ppkgs
end
# Invocation: pythonEnv 3 package1 package2 .. packageN
# or: pythonEnv 2 ..