Fork the desktop off Omarchy as a self-contained system
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Executable
+337
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#!/bin/bash
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# blob:summary=Apply an Blob theme
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# blob:args=<theme-name>
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# blob:examples=blob theme list | blob theme set "Tokyo Night"
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if [[ -z $1 ]]; then
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echo "Usage: blob-theme-set <theme-name>"
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exit 1
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fi
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CURRENT_THEME_PATH="$HOME/.local/state/blob/current/theme"
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NEXT_THEME_PATH="$HOME/.local/state/blob/current/next-theme"
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CURRENT_BACKGROUND_LINK="$HOME/.local/state/blob/current/background"
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BACKGROUND_TRANSITION_CACHE="$HOME/.cache/blob/background-transitions"
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THEME_SET_LOCK="${XDG_RUNTIME_DIR:-/tmp}/blob-theme-set.lock"
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USER_THEMES_PATH="$HOME/.config/blob/themes"
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BLOB_THEMES_PATH="$BLOB_PATH/themes"
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# What a theme installed from a git repo may not ship, because these run code.
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# Hyprland requires a theme's hyprland.lua at login and Neovim loads its
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# neovim.lua at startup, so no .lua from such a theme is staged at all. Each
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# terminal config names the program the terminal launches. vscode.json is denied
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# even though nothing here reads it, because a theme that ships one is naming a
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# VS Code extension, which is arbitrary JavaScript. Everything else a theme
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# ships is colour and is kept.
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#
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# Adding a template for another terminal, or for another editor that loads Lua,
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# means adding it here.
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INSTALLED_THEME_DENIED=(alacritty.toml foot.ini ghostty.conf kitty.conf vscode.json)
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IGNORED_THEME_FILES=()
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run_parallel() {
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local pid
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local pids=()
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for command in "$@"; do
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bash -lc "$command" &
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pids+=("$!")
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done
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for pid in "${pids[@]}"; do
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wait "$pid"
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done
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}
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shell_ipc() {
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timeout 2 blob-shell "$@" >/dev/null 2>&1
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}
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snapshot_background_path() {
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local background="$1"
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local name="$2"
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local snapshot extension
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[[ -f $background ]] || return
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mkdir -p "$BACKGROUND_TRANSITION_CACHE"
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extension=${background##*.}
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snapshot="$BACKGROUND_TRANSITION_CACHE/$name-$$.$extension"
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ln "$background" "$snapshot" 2>/dev/null || cp "$background" "$snapshot"
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echo "$snapshot"
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}
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snapshot_current_background() {
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local current_background
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current_background=$(readlink -f "$CURRENT_BACKGROUND_LINK" 2>/dev/null || true)
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snapshot_background_path "$current_background" "previous"
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}
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choose_theme_background() {
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local backgrounds=()
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local current_background index next_index i
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CHOSEN_THEME_BACKGROUND=""
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mapfile -d '' -t backgrounds < <(
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find -L "$HOME/.config/blob/backgrounds/$THEME_NAME/" "$CURRENT_THEME_PATH/backgrounds/" -maxdepth 1 -type f \
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\( -iname '*.jpg' -o -iname '*.jpeg' -o -iname '*.png' -o -iname '*.gif' -o -iname '*.bmp' -o -iname '*.webp' \) \
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-print0 2>/dev/null | sort -z
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)
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(( ${#backgrounds[@]} > 0 )) || return 1
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current_background=$(readlink "$CURRENT_BACKGROUND_LINK" 2>/dev/null || true)
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index=-1
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for i in "${!backgrounds[@]}"; do
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if [[ ${backgrounds[$i]} == $current_background ]]; then
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index=$i
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break
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fi
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done
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if (( index == -1 )); then
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CHOSEN_THEME_BACKGROUND="${backgrounds[0]}"
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else
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next_index=$(((index + 1) % ${#backgrounds[@]}))
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CHOSEN_THEME_BACKGROUND="${backgrounds[$next_index]}"
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fi
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}
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set_theme_background_link() {
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choose_theme_background || return 1
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ln -nsf "$CHOSEN_THEME_BACKGROUND" "$CURRENT_BACKGROUND_LINK"
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}
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set_theme_background() {
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local new_background new_background_snapshot
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if ! choose_theme_background; then
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blob-notify-send "No background was found for theme" -t 2000
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shell_ipc shell applyTheme "$colors_payload" "$shell_payload" || true
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return
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fi
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new_background="$CHOSEN_THEME_BACKGROUND"
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new_background_snapshot=$(snapshot_background_path "$new_background" "next")
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if [[ -f $OLD_BACKGROUND_SNAPSHOT && -f $new_background_snapshot ]]; then
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shell_ipc background themeTransition "$OLD_BACKGROUND_SNAPSHOT" "$new_background_snapshot" "$new_background" "$colors_payload" "$shell_payload" || \
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shell_ipc shell applyTheme "$colors_payload" "$shell_payload" || true
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(sleep 3; rm -f "$OLD_BACKGROUND_SNAPSHOT" "$new_background_snapshot") &
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elif [[ -f $new_background_snapshot ]]; then
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shell_ipc background themeTransition "" "$new_background_snapshot" "$new_background" "$colors_payload" "$shell_payload" || \
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shell_ipc shell applyTheme "$colors_payload" "$shell_payload" || true
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(sleep 3; rm -f "$new_background_snapshot") &
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else
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shell_ipc background themeTransition "$OLD_BACKGROUND_SNAPSHOT" "$new_background" "$new_background" "$colors_payload" "$shell_payload" || \
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shell_ipc shell applyTheme "$colors_payload" "$shell_payload" || true
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if [[ -f $OLD_BACKGROUND_SNAPSHOT ]]; then
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(sleep 3; rm -f "$OLD_BACKGROUND_SNAPSHOT") &
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fi
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fi
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ln -nsf "$new_background" "$CURRENT_BACKGROUND_LINK"
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}
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is_denied_installed_file() {
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local name="$1"
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local denied
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[[ $name == *.lua ]] && return 0
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for denied in "${INSTALLED_THEME_DENIED[@]}"; do
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[[ $name == "$denied" ]] && return 0
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done
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return 1
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}
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# Themes older than colors.toml still get their palette, but their
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# alacritty.toml never reaches the staged theme: an Alacritty config names the
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# program the terminal launches.
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stage_installed_colors_from_alacritty() {
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local source="$1"
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local scratch
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if [[ -f $NEXT_THEME_PATH/colors.toml ]]; then
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return
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fi
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if [[ ! -f $source/alacritty.toml || -L $source/alacritty.toml ]]; then
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return
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fi
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scratch=$(mktemp -d)
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cp "$source/alacritty.toml" "$scratch/alacritty.toml"
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blob-theme-import "$scratch"
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if [[ -f $scratch/colors.toml ]]; then
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cp "$scratch/colors.toml" "$NEXT_THEME_PATH/colors.toml"
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fi
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rm -rf "$scratch"
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}
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# Copies a directory without ever following a symlink: in an installed theme one
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# points wherever the theme author chose, which is how an unlock.png becomes a
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# copy of any file the session can read.
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stage_installed_dir() {
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local source="$1"
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local dest="$2"
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local entry name
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mkdir -p "$dest"
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for entry in "$source"/*; do
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[[ -e $entry && ! -L $entry ]] || continue
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name=${entry##*/}
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if [[ -d $entry ]]; then
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stage_installed_dir "$entry" "$dest/$name"
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else
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cp "$entry" "$dest/$name"
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fi
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done
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}
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# `blob theme install` clones into ~/.config/blob/themes, so a .git
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# directory there means the contents came from a stranger and are held to the
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# list above. A directory the user wrote themselves, and a symlink to their own
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# working copy, are theirs to fill however they like -- the same distinction
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# blob-theme-extras draws when it decides which themes it may pull.
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theme_came_from_a_repo() {
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local source="$1"
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[[ ! -L $source && -d $source/.git ]]
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}
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stage_installed_theme() {
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local source="$1"
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local entry name
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[[ -d $source ]] || return 0
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for entry in "$source"/*; do
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[[ -e $entry ]] || continue
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name=${entry##*/}
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if [[ -L $entry ]] || is_denied_installed_file "$name"; then
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case "${name,,}" in
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readme* | license* | changelog* | *.md | *.txt) ;;
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*) IGNORED_THEME_FILES+=("$name") ;;
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esac
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elif [[ -d $entry ]]; then
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stage_installed_dir "$entry" "$NEXT_THEME_PATH/$name"
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else
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cp "$entry" "$NEXT_THEME_PATH/$name"
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fi
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done
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stage_installed_colors_from_alacritty "$source"
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}
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report_ignored_theme_files() {
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(( ${#IGNORED_THEME_FILES[@]} > 0 )) || return 0
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echo "Ignored in $USER_THEMES_PATH/$THEME_NAME: ${IGNORED_THEME_FILES[*]}" >&2
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echo "A theme installed from a git repo cannot supply Lua, a terminal config, or vscode.json." >&2
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}
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THEME_NAME=$(echo "$1" | sed -E 's/<[^>]+>//g' | tr '[:upper:]' '[:lower:]' | tr ' ' '-')
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THEME_HEADLESS=0
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if [[ ${BLOB_THEME_HEADLESS:-} == "1" || ${BLOB_THEME_OFFLINE:-} == "1" ]]; then
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THEME_HEADLESS=1
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fi
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if [[ -z $THEME_NAME || $THEME_NAME == .* || $THEME_NAME == */* ]]; then
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echo "Invalid theme name: $1"
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exit 1
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fi
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if [[ ! -d $BLOB_THEMES_PATH/$THEME_NAME ]] && [[ ! -d $USER_THEMES_PATH/$THEME_NAME ]]; then
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echo "Theme '$THEME_NAME' does not exist"
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exit 1
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fi
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# Serialize theme changes. Theme switching rebuilds a shared next-theme staging
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# directory and updates current theme/background symlinks; concurrent calls can
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# otherwise race and make one selection appear to be ignored.
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exec 9>"$THEME_SET_LOCK"
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flock 9
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# Setup clean next theme directory (for atomic theme config swapping)
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rm -rf "$NEXT_THEME_PATH"
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mkdir -p "$NEXT_THEME_PATH"
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# Copy official theme first, then overlay the user's theme on top
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cp -r "$BLOB_THEMES_PATH/$THEME_NAME/"* "$NEXT_THEME_PATH/" 2>/dev/null
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if theme_came_from_a_repo "$USER_THEMES_PATH/$THEME_NAME"; then
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stage_installed_theme "$USER_THEMES_PATH/$THEME_NAME"
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report_ignored_theme_files
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else
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cp -r "$USER_THEMES_PATH/$THEME_NAME/"* "$NEXT_THEME_PATH/" 2>/dev/null
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fi
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# Generate colors.toml from alacritty.toml if theme is missing colors.toml
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if [[ ! -f $NEXT_THEME_PATH/colors.toml && -f $NEXT_THEME_PATH/alacritty.toml ]]; then
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blob-theme-import "$NEXT_THEME_PATH"
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fi
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# Generate dynamic configs
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blob-theme-templates
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OLD_BACKGROUND_SNAPSHOT=""
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if [[ $THEME_HEADLESS != "1" && $BLOB_THEME_SKIP_BACKGROUND != "1" ]]; then
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OLD_BACKGROUND_SNAPSHOT=$(snapshot_current_background)
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fi
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# Swap next theme in as current
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rm -rf "$CURRENT_THEME_PATH"
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mv "$NEXT_THEME_PATH" "$CURRENT_THEME_PATH"
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# Store theme name for reference
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echo "$THEME_NAME" >"$HOME/.local/state/blob/current/theme.name"
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# Make the running shell pick up the new palette immediately while the rest of
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# the theme hooks run.
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colors_payload=$([[ -f $CURRENT_THEME_PATH/colors.toml ]] && base64 -w 0 "$CURRENT_THEME_PATH/colors.toml")
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shell_payload=$([[ -f $CURRENT_THEME_PATH/shell.toml ]] && base64 -w 0 "$CURRENT_THEME_PATH/shell.toml")
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if [[ $THEME_HEADLESS == "1" ]]; then
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# No shell/session bus exists during ISO chroot finalization, but the first
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# real login still needs a current background symlink for blob-shell to
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# render.
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[[ $BLOB_THEME_SKIP_BACKGROUND == "1" ]] || set_theme_background_link || true
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elif [[ $BLOB_THEME_SKIP_BACKGROUND == "1" ]]; then
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shell_ipc shell applyTheme "$colors_payload" "$shell_payload" || true
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else
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set_theme_background
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fi
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# The shared staging/current symlinks are updated and the shell has accepted
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# the transition. Let another theme selection queue only behind that critical
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# section, not behind slower app-retint hooks and selector cache warmups.
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flock -u 9
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post_theme_commands=(
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blob-restart-terminal
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blob-hypr-restart
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blob-restart-btop
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blob-theme-foot
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blob-theme-browser
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)
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if [[ $THEME_HEADLESS != "1" ]]; then
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run_parallel "${post_theme_commands[@]}"
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# Call hook on theme set
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blob-hook theme-set "$THEME_NAME" >/dev/null
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# Warm selector caches after the theme is applied. The shell hot-reloads theme
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# colors/backgrounds, so keep the running instance alive and preload the picker
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# rows/selection to avoid first-open carousel settling after a theme change.
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blob-theme-switcher --preload >/dev/null 2>&1
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blob-bg-cache >/dev/null 2>&1 &
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fi
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