home-manager/modules/programs/direnv.nix

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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.programs.direnv;
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configFile = config:
pkgs.runCommand "config.toml"
{
buildInputs = [ pkgs.remarshal ];
preferLocalBuild = true;
allowSubstitutes = false;
}
''
remarshal -if json -of toml \
< ${pkgs.writeText "config.json" (builtins.toJSON config)} \
> $out
'';
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in
{
meta.maintainers = [ maintainers.rycee ];
options.programs.direnv = {
enable = mkEnableOption "direnv, the environment switcher";
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config = mkOption {
type = types.attrs;
default = {};
description = ''
Configuration written to
<filename>~/.config/direnv/config.toml</filename>.
</para><para>
See
<citerefentry>
<refentrytitle>direnv.toml</refentrytitle>
<manvolnum>1</manvolnum>
</citerefentry>.
for the full list of options.
'';
};
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stdlib = mkOption {
type = types.lines;
default = "";
description = ''
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Custom stdlib written to
<filename>~/.config/direnv/direnvrc</filename>.
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'';
};
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enableBashIntegration = mkOption {
default = true;
type = types.bool;
description = ''
Whether to enable Bash integration.
'';
};
enableZshIntegration = mkOption {
default = true;
type = types.bool;
description = ''
Whether to enable Zsh integration.
'';
};
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enableFishIntegration = mkOption {
default = true;
type = types.bool;
description = ''
Whether to enable Fish integration.
'';
};
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};
config = mkIf cfg.enable {
home.packages = [ pkgs.direnv ];
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xdg.configFile."direnv/config.toml" = mkIf (cfg.config != {}) {
source = configFile cfg.config;
};
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xdg.configFile."direnv/direnvrc" = mkIf (cfg.stdlib != "") {
text = cfg.stdlib;
};
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programs.bash.initExtra =
mkIf cfg.enableBashIntegration (
# Using mkAfter to make it more likely to appear after other
# manipulations of the prompt.
mkAfter ''
eval "$(${pkgs.direnv}/bin/direnv hook bash)"
''
);
programs.zsh.initExtra = mkIf cfg.enableZshIntegration ''
eval "$(${pkgs.direnv}/bin/direnv hook zsh)"
'';
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programs.fish.shellInit = mkIf cfg.enableFishIntegration ''
eval (${pkgs.direnv}/bin/direnv hook fish)
'';
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};
}