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theming: ghostty and btop read through the state symlink

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Drops the copy step for both: a switch is now just the ln -sfn, so there
is no second write to fail and no stale copy to survive. Verified with
ghostty +show-config that retargeting the link alone changes the
effective background/foreground. Also log the applied theme per run.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
rope 2026-08-19 15:23:10 +01:00
parent 43f6a886ac
commit 8e33a7ba12
1 changed files with 19 additions and 4 deletions
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23
settings/theming.nix
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@ -385,12 +385,18 @@ let
theme="$1"
[ -d "$theme" ] || exit 0
# One line per run, so the journal answers "did it fire, and with what?"
# without any guessing: journalctl --user -u quickshell | grep theme-apply
echo "theme-apply: $theme" >&2
ln -sfn "$theme" ${lib.escapeShellArg stateLink}
# Only the files an app insists on finding at a fixed path get copied.
# Ghostty and btop are pointed straight at the state symlink instead
# (see the home-manager block below) — one less write to go wrong, and no
# way for a stale copy to survive a switch.
install -Dm644 "$theme/gtk3.css" "$HOME/.config/gtk-3.0/gtk.css"
install -Dm644 "$theme/gtk4.css" "$HOME/.config/gtk-4.0/gtk.css"
install -Dm644 "$theme/ghostty.conf" "$HOME/.config/ghostty/theme.conf"
install -Dm644 "$theme/btop.theme" "$HOME/.config/btop/themes/runtime.theme"
install -Dm644 "$theme/vesktop.css" "$HOME/.config/vesktop/settings/quickCss.css"
install -Dm644 "$theme/zen.css" "$HOME/${zenChrome}/userChrome.css"
@ -500,9 +506,18 @@ in
name = "Papirus-Fred";
};
programs.ghostty.settings.config-file = "?${homeDir}/.config/ghostty/theme.conf";
# Both read straight through the state symlink, so a switch is nothing
# but the `ln -sfn` in theme-apply — no copy to fail, nothing stale.
#
# The leading `?` marks the include optional: before the first
# theme-apply of a fresh account the link does not exist yet, and
# without it ghostty treats that as a config error. Includes are also
# applied AFTER the file that names them, so these colours win over
# anything home-manager writes above.
programs.ghostty.settings.config-file = "?${stateLink}/ghostty.conf";
# Manual escape hatch; the switcher itself reloads over D-Bus.
programs.ghostty.settings.keybind = [ "ctrl+shift+alt+f12=reload_config" ];
programs.btop.settings.color_theme = "${homeDir}/.config/btop/themes/runtime.theme";
programs.btop.settings.color_theme = "${stateLink}/btop.theme";
};
};
}