nix-config/modules/home/delta/default.nix
Bruno BELANYI cb45ece777
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home: delta: use stand-alone configuration file
Ideally, I'd like for `delta` to just read a configuration file at
`$XDG_CONFIG_HOME/delta/config` by default, but upstream seems somewhat
reticent to the idea :-/.

So instead, let's keep relying on `git` being enabled, but rather than
inlining the configuration, let's store it where I think it should
belong and include it into `gitconfig`.
2025-08-26 13:09:18 +00:00

79 lines
1.9 KiB
Nix

{ config, pkgs, lib, ... }:
let
cfg = config.my.home.delta;
configFormat = pkgs.formats.gitIni { };
configPath = "${config.xdg.configHome}/delta/config";
in
{
options.my.home.delta = with lib; {
enable = my.mkDisableOption "delta configuration";
package = mkPackageOption pkgs "delta" { };
git = {
enable = my.mkDisableOption "git integration";
};
};
config = lib.mkIf cfg.enable {
assertions = [
{
# For its configuration
assertion = cfg.enable -> cfg.git.enable;
message = ''
`config.my.home.delta` must enable `config.my.home.delta.git` to be
properly configured.
'';
}
{
assertion = cfg.enable -> config.programs.git.enable;
message = ''
`config.my.home.delta` relies on `config.programs.git` to be
enabled.
'';
}
];
home.packages = [ cfg.package ];
xdg.configFile."delta/config".source = configFormat.generate "delta-config" {
delta = {
features = "diff-highlight decorations";
# Less jarring style for `diff-highlight` emulation
diff-highlight = {
minus-style = "red";
minus-non-emph-style = "red";
minus-emph-style = "bold red 52";
plus-style = "green";
plus-non-emph-style = "green";
plus-emph-style = "bold green 22";
whitespace-error-style = "reverse red";
};
# Personal preference for easier reading
decorations = {
commit-style = "raw"; # Do not recolor meta information
keep-plus-minus-markers = true;
paging = "always";
};
};
};
programs.git = lib.mkIf cfg.git.enable {
delta = {
enable = true;
inherit (cfg) package;
};
includes = [
{
path = configPath;
}
];
};
};
}