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feat(macos): Alacritty follows system light/dark appearance

Browse source 
New setup — due for review after you run darwin-rebuild switch and
live with it for a few days. See CLAUDE.md (Alacritty) and
assets/alacritty/README.md.

- HM: import active-colors.toml + Catppuccin latte/mocha fragments
- nix-darwin: launchd.user.agents.alacritty-system-theme + PATH helper
- fish: background sync on Darwin; theme.sh no longer rebuilds for Alacritty
- Remove switch-alacritty-theme.sh (sed + darwin-rebuild per toggle)

Made-with: Cursor
This commit is contained in:
DannyDannyDanny 2026-03-23 19:16:05 +01:00
parent 18ccebc109
commit b311e21d5b
15 changed files with 196 additions and 293 deletions
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61
nixos/home/danny/home.nix
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@ -1,4 +1,4 @@
{ pkgs, lib, zen-browser ? null, ... }:
{ pkgs, lib, config, zen-browser ? null, ... }:
{
# TODO: remove next two lines from here or from flake.nix
# home.username = "danny";
@ -112,15 +112,26 @@
executable = true;
};
# Alacritty terminal configuration with conditional theme switching
# Palette fragments: synced to system appearance (see scripts/alacritty-sync-system-theme.sh).
xdg.configFile."alacritty/catppuccin-latte-colors.toml".source =
../../../assets/alacritty/catppuccin-latte-colors.toml;
xdg.configFile."alacritty/catppuccin-mocha-colors.toml".source =
../../../assets/alacritty/catppuccin-mocha-colors.toml;
# Alacritty: base config + imported active-colors.toml (updated without rebuild)
programs.alacritty = {
enable = true;
settings = {
general = {
live_config_reload = true;
import = [ "${config.xdg.configHome}/alacritty/active-colors.toml" ];
};
window = {
padding = { x = 8; y = 8; };
dynamic_padding = true;
decorations = "buttonless";
opacity = 0.95;
decorations_theme_variant = "None";
opacity = 1.0;
startup_mode = "Maximized";
option_as_alt = "Both";
};
@ -134,43 +145,19 @@
program = "${pkgs.fish}/bin/fish";
};
};
# Conditional colors based on system theme
colors = let
# Set this to true for light theme, false for dark theme
# You can change this and run 'darwin-rebuild switch' to switch themes
isLightTheme = true;
# Catppuccin Latte (Light) colors
lightColors = {
primary = { background = "0xeff1f5"; foreground = "0x4c4f69"; };
cursor = { text = "0xeff1f5"; cursor = "0xdc8a78"; };
normal = {
black = "0x5c5f77"; red = "0xd20f39"; green = "0x40a02b"; yellow = "0xdf8e1d";
blue = "0x1e40af"; magenta = "0xea76cb"; cyan = "0x179299"; white = "0xacb0be";
};
bright = {
black = "0x6c6f85"; red = "0xd20f39"; green = "0x40a02b"; yellow = "0xdf8e1d";
blue = "0x1e40af"; magenta = "0xea76cb"; cyan = "0x179299"; white = "0xbcc0cc";
};
};
# Catppuccin Mocha (Dark) colors
darkColors = {
primary = { background = "0x1e1e2e"; foreground = "0xcdd6f4"; };
cursor = { text = "0x1e1e2e"; cursor = "0xf5e0dc"; };
normal = {
black = "0x45475a"; red = "0xf38ba8"; green = "0xa6e3a1"; yellow = "0xf9e2af";
blue = "0x89b4fa"; magenta = "0xf5c2e7"; cyan = "0x94e2d5"; white = "0xbac2de";
};
bright = {
black = "0x585b70"; red = "0xf38ba8"; green = "0xa6e3a1"; yellow = "0xf9e2af";
blue = "0x89b4fa"; magenta = "0xf5c2e7"; cyan = "0x94e2d5"; white = "0xa6adc8";
};
};
in if isLightTheme then lightColors else darkColors;
};
};
# Writable copy (not a symlink to the store — cp in the sync script must replace a real file).
home.activation.alacrittySystemTheme = lib.hm.dag.entryAfter [ "writeBoundary" ] ''
MOCHA="${config.xdg.configHome}/alacritty/catppuccin-mocha-colors.toml"
ACTIVE="${config.xdg.configHome}/alacritty/active-colors.toml"
if [ ! -f "$ACTIVE" ]; then
$DRY_RUN_CMD cp "$MOCHA" "$ACTIVE"
fi
$DRY_RUN_CMD ${pkgs.bash}/bin/bash "${../../../scripts/alacritty-sync-system-theme.sh}" || true
'';
# TODO: Put user-installed binaries here if you want HM to own them (optional)
# Fonts