nixos/modules/base/fish.nix

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{pkgs, ...}: {
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# Fish is a Unix shell with a focus on interactivity and usability. Fish is
# designed to give the user features by default, rather than by
# configuration.
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# https://nixos.wiki/wiki/Fish
# https://nixos.wiki/wiki/Command_Shell
programs.fish = {
enable = true;
interactiveShellInit = ''
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# fzf: use ctrl+f to list files and ctrl+g to show the git log
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fzf_configure_bindings --directory=\cf --git_log=\cg
'';
};
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# Installing a fish plugin automatically enables it
environment.systemPackages = with pkgs; [
fishPlugins.colored-man-pages
fishPlugins.fzf-fish
fishPlugins.pure
];
# Set fish as the default shell system-wide
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users.defaultUserShell = pkgs.fish;
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# Add fish to the list of permissible login shells for user accounts
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environment.shells = with pkgs; [fish];
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# Enabling fish in both NixOS and home manager is required to pick up
# completions and environment variables set by NixOS nixpkgs _and_ home
# manager modules at the same time. As a test, the environment variables from
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# $ nix repl
# > :lf .
# > :p nixosConfigurations.omega.config.home-manager.users.caspervk.home.sessionVariables
# > :p nixosConfigurations.omega.config.home-manager.users.caspervk.home.sessionVariablesExtra
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# should be available in the desktop environment's shell. See
# https://nix-community.github.io/home-manager/index.html#_why_are_the_session_variables_not_set.
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home-manager.users.caspervk = {
programs.fish.enable = true;
};
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}