Fish: Difference between revisions

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Created page with "Fish is the [http://fishshell.com/ Friendly Interactive SHell]. At the moment it’s not possible to use fish as login shell. But you can always start it as default shell of..."
 
imported>Mic92
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Fish is the [http://fishshell.com/ Friendly Interactive SHell].
Fish is the [http://fishshell.com/ Friendly Interactive SHell].


At the moment it’s not possible to use fish as login shell. But you can always start it as default shell of your terminal emulator.
== Fish as login shell ==
 
The following set up fish as a login shell for the user <code>myuser</code>
 
<syntaxhighlight lang="nix">
programs.fish.enable = true;
users.extraUsers.myuser = {
  shell = "/run/current-system/sw/bin/fish";
};
</syntaxhighlight>


== Useful scripts ==
== Useful scripts ==

Revision as of 22:01, 22 August 2017

Fish is the Friendly Interactive SHell.

Fish as login shell

The following set up fish as a login shell for the user myuser

programs.fish.enable = true;
users.extraUsers.myuser = {
  shell = "/run/current-system/sw/bin/fish";
};

Useful scripts

Show that you are in a nix-shell

Add this to fish/fish_prompt.fish:

 set -l nix_shell_info (
   if test "$IN_NIX_SHELL" = "1"
     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.

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 ..