Alexander
116 lines
4.2 KiB
Bash
116 lines
4.2 KiB
Bash
# shellcheck shell=bash
|
|
# theme-switch — activate a pre-built Home Manager specialisation.
|
|
#
|
|
# Expects these variables to be injected by the Nix wrapper:
|
|
# baseVariant the variant that is the generation itself (not a
|
|
# specialisation), activated via `$gen/activate`.
|
|
# availableVariants space-separated list of all variant names (help text).
|
|
# doomThemes optional space-separated `variant:doomtheme` pairs for
|
|
# the best-effort Doom Emacs live-switch (may be empty).
|
|
#
|
|
# Standalone usage for testing:
|
|
# baseVariant=gruvbox-dark \
|
|
# availableVariants="gruvbox-dark gruvbox-light catppuccin-dark catppuccin-light" \
|
|
# doomThemes="gruvbox-dark:doom-gruvbox" \
|
|
# bash theme-switch.sh <variant>
|
|
|
|
: "${baseVariant:?theme-switch: baseVariant not set}"
|
|
: "${availableVariants:?theme-switch: availableVariants not set}"
|
|
: "${doomThemes:=}"
|
|
set -euo pipefail
|
|
|
|
variant="${1:-}"
|
|
|
|
if [ -z "$variant" ]; then
|
|
echo "Usage: theme-switch <variant>"
|
|
echo "Available: ${availableVariants}"
|
|
exit 1
|
|
fi
|
|
|
|
# Resolve the Home Manager *base* generation — the one built by NixOS that
|
|
# actually contains the `specialisation/` directory holding every variant's
|
|
# activation script.
|
|
#
|
|
# IMPORTANT: do NOT use `current-home` / the HM profile as the primary
|
|
# source. Activating a specialisation repoints those to the specialisation's
|
|
# *leaf* generation, which has no `specialisation/` of its own — so after
|
|
# switching once, every other variant (and the base) would become unfindable.
|
|
# The NixOS-managed `home-manager-«user».service` unit references the base
|
|
# generation and only changes on a rebuild.
|
|
user="${USER:-$(id -un)}"
|
|
gen=""
|
|
if unit="$(systemctl cat "home-manager-${user}.service" 2>/dev/null)"; then
|
|
gen="$(printf '%s\n' "$unit" | grep -oE '/nix/store/[0-9a-z]+-home-manager-generation' | head -n1)"
|
|
fi
|
|
|
|
# Fallbacks for standalone Home Manager, where the profile symlink / gcroot
|
|
# points at the base generation (not a specialisation leaf).
|
|
for candidate in \
|
|
"${HOME}/.local/state/home-manager/gcroots/current-home" \
|
|
"/nix/var/nix/profiles/per-user/${user}/home-manager" \
|
|
"${HOME}/.local/state/home-manager/home-manager-generation"
|
|
do
|
|
[ -n "$gen" ] && break
|
|
if [ -e "$candidate" ]; then
|
|
gen="$(readlink -e "$candidate")" || gen=""
|
|
fi
|
|
done
|
|
|
|
if [ -z "$gen" ]; then
|
|
log_error "could not resolve Home Manager base generation"
|
|
exit 1
|
|
fi
|
|
|
|
case "$variant" in
|
|
"${baseVariant}")
|
|
# Base variant is the generation itself, not a specialisation.
|
|
activate="$gen/activate"
|
|
;;
|
|
*)
|
|
activate="$gen/specialisation/$variant/activate"
|
|
;;
|
|
esac
|
|
|
|
if [ ! -x "$activate" ]; then
|
|
log_error "variant '$variant' not found at $activate"
|
|
log_info "available: ${availableVariants}"
|
|
exit 1
|
|
fi
|
|
|
|
log_info "switching theme to ${variant}"
|
|
|
|
# Best-effort: live-switch the running Doom Emacs daemon too. No config
|
|
# files are touched; if the daemon isn't running or emacsclient isn't
|
|
# installed (e.g. on a server), this is silently skipped.
|
|
doom_theme=""
|
|
if [ -n "$doomThemes" ]; then
|
|
for pair in $doomThemes; do
|
|
case "$pair" in
|
|
"${variant}":*) doom_theme="${pair#*:}"; break ;;
|
|
esac
|
|
done
|
|
fi
|
|
if [ -n "$doom_theme" ]; then
|
|
if command -v emacsclient >/dev/null 2>&1 \
|
|
&& emacsclient --eval "(progn (mapc (function disable-theme) custom-enabled-themes) (load-theme (quote ${doom_theme}) t))" >/dev/null 2>&1; then
|
|
log_info "doom: ${doom_theme}"
|
|
else
|
|
log_warn "doom theme not applied (daemon not running or '${doom_theme}' not installed)"
|
|
fi
|
|
fi
|
|
|
|
# Pick a palette-matching wallpaper and apply it. This BLOCKS — on the very
|
|
# first run wallpaper-pick clones the wallpaper repo and builds the palette
|
|
# index, which can take a few minutes; progress is logged on stderr by the
|
|
# pick/set scripts. Failures fall back to leaving the wallpaper unchanged.
|
|
if [ "${wallpapersEnabled:-0}" = "1" ] && [ -n "${wallpaperPickBin:-}" ] && [ -n "${wallpaperSetBin:-}" ]; then
|
|
if wp="$("$wallpaperPickBin" "$variant")" && [ -n "$wp" ]; then
|
|
"$wallpaperSetBin" "$wp" || log_warn "wallpaper apply failed"
|
|
else
|
|
log_warn "wallpaper selection failed; leaving wallpaper unchanged"
|
|
fi
|
|
fi
|
|
|
|
log_info "activating Home Manager specialisation"
|
|
exec "$activate"
|