nixpkgs/nixos/modules/programs/direnv.nix
Gerg-L ee3da00d59
nixos/direnv: add enable{Bash,Fish,Zsh}Integrations
use shorthand function for enabled by default options
2024-07-28 01:09:11 -04:00

152 lines
4.2 KiB
Nix

{
lib,
config,
pkgs,
...
}:
let
cfg = config.programs.direnv;
enabledOption =
x:
lib.mkEnableOption x
// {
default = true;
example = false;
};
in
{
options.programs.direnv = {
enable = lib.mkEnableOption ''
direnv integration. Takes care of both installation and
setting up the sourcing of the shell. Additionally enables nix-direnv
integration. Note that you need to logout and login for this change to apply
'';
package = lib.mkPackageOption pkgs "direnv" { };
enableBashIntegration = enabledOption ''
Bash integration
'';
enableZshIntegration = enabledOption ''
Zsh integration
'';
enableFishIntegration = enabledOption ''
Fish integration
'';
direnvrcExtra = lib.mkOption {
type = lib.types.lines;
default = "";
example = ''
export FOO="foo"
echo "loaded direnv!"
'';
description = ''
Extra lines to append to the sourced direnvrc
'';
};
silent = lib.mkEnableOption ''
the hiding of direnv logging
'';
loadInNixShell = enabledOption ''
loading direnv in `nix-shell` `nix shell` or `nix develop`
'';
nix-direnv = {
enable = enabledOption ''
a faster, persistent implementation of use_nix and use_flake, to replace the builtin one
'';
package = lib.mkOption {
default = pkgs.nix-direnv.override { nix = config.nix.package; };
defaultText = "pkgs.nix-direnv";
type = lib.types.package;
description = ''
The nix-direnv package to use
'';
};
};
};
config = lib.mkIf cfg.enable {
programs = {
zsh.interactiveShellInit = lib.mkIf cfg.enableZshIntegration ''
if ${lib.boolToString cfg.loadInNixShell} || printenv PATH | grep -vqc '/nix/store'; then
eval "$(${lib.getExe cfg.package} hook zsh)"
fi
'';
#$NIX_GCROOT for "nix develop" https://github.com/NixOS/nix/blob/6db66ebfc55769edd0c6bc70fcbd76246d4d26e0/src/nix/develop.cc#L530
#$IN_NIX_SHELL for "nix-shell"
bash.interactiveShellInit = lib.mkIf cfg.enableBashIntegration ''
if ${lib.boolToString cfg.loadInNixShell} || [ -z "$IN_NIX_SHELL$NIX_GCROOT$(printenv PATH | grep '/nix/store')" ] ; then
eval "$(${lib.getExe cfg.package} hook bash)"
fi
'';
fish.interactiveShellInit = lib.mkIf cfg.enableFishIntegration ''
if ${lib.boolToString cfg.loadInNixShell};
or printenv PATH | grep -vqc '/nix/store';
${lib.getExe cfg.package} hook fish | source
end
'';
};
environment = {
systemPackages = [
# direnv has a fish library which automatically sources direnv for some reason
# I don't see any harm in doing this if we're sourcing it with fish.interactiveShellInit
(pkgs.symlinkJoin {
inherit (cfg.package) name;
paths = [ cfg.package ];
postBuild = ''
rm -rf $out/share/fish
'';
})
];
variables = {
DIRENV_CONFIG = "/etc/direnv";
DIRENV_LOG_FORMAT = lib.mkIf cfg.silent "";
};
etc = {
"direnv/direnvrc".text = ''
${lib.optionalString cfg.nix-direnv.enable ''
#Load nix-direnv
source ${cfg.nix-direnv.package}/share/nix-direnv/direnvrc
''}
#Load direnvrcExtra
${cfg.direnvrcExtra}
#Load user-configuration if present (~/.direnvrc or ~/.config/direnv/direnvrc)
direnv_config_dir_home="''${DIRENV_CONFIG_HOME:-''${XDG_CONFIG_HOME:-$HOME/.config}/direnv}"
if [[ -f $direnv_config_dir_home/direnvrc ]]; then
source "$direnv_config_dir_home/direnvrc" >&2
elif [[ -f $HOME/.direnvrc ]]; then
source "$HOME/.direnvrc" >&2
fi
unset direnv_config_dir_home
'';
"direnv/lib/zz-user.sh".text = ''
direnv_config_dir_home="''${DIRENV_CONFIG_HOME:-''${XDG_CONFIG_HOME:-$HOME/.config}/direnv}"
for lib in "$direnv_config_dir_home/lib/"*.sh; do
source "$lib"
done
unset direnv_config_dir_home
'';
};
};
};
meta.maintainers = with lib.maintainers; [ gerg-l ];
}