From 5bd14cffe98d057c062429bb130769e95ca65ee3 Mon Sep 17 00:00:00 2001
From: Romain Paquet <rpqt@rpqt.fr>
Date: Tue, 27 Jan 2026 14:36:11 +0100
Subject: [PATCH] alacritty: auto switch dark/light theme

---
 home-manager/desktop/terminal.nix             |  3 +-
 home/.config/alacritty/alacritty.toml         |  4 +--
 .../alacritty/themes/default_light.toml       | 33 +++++++++++++++++++
 home/bin/switch-helix-theme.sh                | 18 ++++++++--
 4 files changed, 52 insertions(+), 6 deletions(-)
 create mode 100644 home/.config/alacritty/themes/default_light.toml

diff --git a/home-manager/desktop/terminal.nix b/home-manager/desktop/terminal.nix
index 46ce790..5f35837 100644
--- a/home-manager/desktop/terminal.nix
+++ b/home-manager/desktop/terminal.nix
@@ -15,8 +15,7 @@
   ];
 
   programs.alacritty.enable = true;
-  xdg.configFile."alacritty/alacritty.toml".source =
-    "${config.dotfiles.path}/.config/alacritty/alacritty.toml";
+  xdg.configFile."alacritty".source = "${config.dotfiles.path}/.config/alacritty";
 
   xdg.configFile."ghostty/config".source = "${config.dotfiles.path}/.config/ghostty/config";
 }
diff --git a/home/.config/alacritty/alacritty.toml b/home/.config/alacritty/alacritty.toml
index 62b95bd..cc3c2f0 100644
--- a/home/.config/alacritty/alacritty.toml
+++ b/home/.config/alacritty/alacritty.toml
@@ -1,6 +1,6 @@
 [general]
-live_config_reload = false
-import = ["~/.config/alacritty/themes/kanagawa_wave.toml"]
+live_config_reload = true
+import = ["~/.config/alacritty/themes/default_light.toml"]
 
 [font]
 size = 14
diff --git a/home/.config/alacritty/themes/default_light.toml b/home/.config/alacritty/themes/default_light.toml
new file mode 100644
index 0000000..50b2dc0
--- /dev/null
+++ b/home/.config/alacritty/themes/default_light.toml
@@ -0,0 +1,33 @@
+# Colors (Builtin Light)
+
+[colors.bright]
+black = '#555555'
+blue = '#5555ff'
+cyan = '#22cccc'
+green = '#2fd92f'
+magenta = '#ff55ff'
+red = '#ff5555'
+white = '#ffffff'
+yellow = '#bfbf15'
+
+[colors.cursor]
+cursor = '#000000'
+text = '#ffffff'
+
+[colors.normal]
+black = '#000000'
+blue = '#0000bb'
+cyan = '#00bbbb'
+green = '#00bb00'
+magenta = '#bb00bb'
+red = '#bb0000'
+white = '#bbbbbb'
+yellow = '#bbbb00'
+
+[colors.primary]
+background = '#ffffff'
+foreground = '#000000'
+
+[colors.selection]
+background = '#b5d5ff'
+text = '#000000'
diff --git a/home/bin/switch-helix-theme.sh b/home/bin/switch-helix-theme.sh
index f11f803..3d21409 100755
--- a/home/bin/switch-helix-theme.sh
+++ b/home/bin/switch-helix-theme.sh
@@ -6,10 +6,24 @@ HELIX_CONFIG_PATH=$(readlink -f "${HOME}/.config/helix/config.toml")
 HELIX_THEME_LIGHT="zed_onelight"
 HELIX_THEME_DARK="kanagawa"
 
+ALACRITTY_CONFIG_PATH=$(readlink -f "${HOME}/.config/alacritty/alacritty.toml")
+ALACRITTY_THEME_LIGHT="default_light"
+ALACRITTY_THEME_DARK="kanagawa_wave"
+
+set_helix_theme() {
+  sed -i "s/^theme .*/theme = \"$1\"/" "$HELIX_CONFIG_PATH"
+}
+
+set_alacritty_theme() {
+  sed -i "s/^import .*/import = \[\"\~\/\.config\/alacritty\/themes\/$1\.toml\"\]/" "$ALACRITTY_CONFIG_PATH"
+}
+
 if [[ "$2" == "prefer-dark" ]]; then
-  sed -i "s/^theme .*/theme = \"$HELIX_THEME_DARK\"/" "$HELIX_CONFIG_PATH"
+  set_helix_theme "$HELIX_THEME_DARK"
+  sey_alacritty_theme "$HELIX_THEME_DARK"
 else
-  sed -i "s/^theme .*/theme = \"$HELIX_THEME_LIGHT\"/" "$HELIX_CONFIG_PATH"
+  set_helix_theme "$HELIX_THEME_LIGHT"
+  set_alacritty_theme "$HELIX_THEME_LIGHT"
 fi
 
 pkill -USR1 hx || true