uriel1998/eOSUDS.sh

## eOSUDS.sh
#!/usr/bin/bash


# =======================================
# eOS-Universal-Dark-Style
# =======================================

# elementaryOS 6 has great dark themes, but they only apply to "curated" appcenter apps
# This script forces the system theme to work with regular Debian packages as well as non-curated Flatpak apps
# It also optionally changes the wallpaper based on the theme
# It also supports changing themes for the Mailspring email app (both .deb and Snap versions)


# =======================================
# Instructions
# =======================================

# 1. Save this script and make it executable
# 2. Change the configuration variables below as needed
# 3. Use a cron job to run the script automatically on a desired schedule; you can learn about cron by running `man crontab` in a terminal
#    Note that system updates can reset the forced Flatpak theming, so running the script frequently (every few minutes) is recommended

# =======================================
# Configuration
# =======================================

#LIGHT_THEME_WALLPAPER='/usr/share/backgrounds/odin.jpg' # Leave empty to disable wallpaper switching on light theme
#DARK_THEME_WALLPAPER='/usr/share/backgrounds/odin-dark.jpg' # Leave empty to disable wallpaper switching on dark theme
#MAILSPRING_LIGHT_THEME='ui-light' # Leave empty to disable Mailspring theme switching on light theme
#MAILSPRING_DARK_THEME='ui-dark' # Leave empty to disable Mailspring theme switching on dark theme
SHOW_DEBUG_MESSAGES=0 # If debug logs should be printed, set to 1


# =======================================
# Script functions
# =======================================

# Echoes provided string with a date prefix. If $2 is 1, redirects to stderr with ERROR prefix. If $3 is 1, echoes a crash message to stderr and exits with code 1
# If $4 is 1, the message is treated as a debug log (only shown if the relevant configuration variable above is set)
log() {
	if [ "$2" == 1 ]; then
		echo -e "ERROR: $(date): $1" >&2
	elif [ "$4" == 1 ]; then
		if [ "$SHOW_DEBUG_MESSAGES" == 1 ]; then
			echo -e "DEBUG: $(date): $1"
		fi
	else
		echo -e "MESSG: $(date): $1"
	fi
	if [ "$3" == 1 ]; then
		echo -e "CRASHED." >&2
		exit 1
	fi

}

# Echoes 1 if the system dark style is set, 0 otherwise
getSystemDarkStylePref() {
	#[ "$(gsettings get org.freedesktop prefers-color-scheme)" = "'dark'" ] && echo 1 || echo 0
    echo 1
}

# Changes the universal GTK dark theme preference based on the provided argument (if they are different)
changeGTKUniversalDarkPrefIfNeeded() {
	# Ensure the provided argument is valid before making the change
	echo "$1 HI"
    [ "$1" == 0 ] || [ "$1" == 1 ] || log "GTK universal dark preference can only be set to 0 or 1" 1 1
	# The location of the universal GTK dark preference config file
	GTK_UNIVERSAL_PREF_FILE=~/.config/gtk-3.0/settings.ini
	# Ensure the file exists (if not, create it)
	if [ ! -f "$GTK_UNIVERSAL_PREF_FILE" ]; then
		echo -e '[Settings]\ngtk-application-prefer-dark-theme=1\n' > "$GTK_UNIVERSAL_PREF_FILE"
	fi
	# Grab the pref
	GTK_UNIVERSAL_PREF_IS_DARK="$(cat "$GTK_UNIVERSAL_PREF_FILE" | grep -o [0-1])"
	# If needed, make the change
	if [ "$GTK_UNIVERSAL_PREF_IS_DARK" != "$1" ]; then
		sed -i "s/gtk-application-prefer-dark-theme=.*/gtk-application-prefer-dark-theme=$1/" "$GTK_UNIVERSAL_PREF_FILE"
		log "GTK universal dark preference has been set to $1"
	else
		log "GTK universal dark preference is already $1, no changes made" 0 0 1
	fi
}

# Changes the wallpaper to the one given in the argument (if not already set)
# If the argument is empty, does nothing (does NOT throw an error)
changeWallpaperIfNeeded() {
	if [ ! -z "$1" ]; then
		CURRENT_WALLPAPER="$(gsettings get org.gnome.desktop.background picture-uri | head -c -2 | tail -c +9)"
		if [ "$CURRENT_WALLPAPER" != "$1" ]; then
			# This if statement allows the wallpaper change to work even when running from a cron job
			if [ -z "$DBUS_SESSION_BUS_ADDRESS" ]; then
				PID=$(pgrep gnome-session)
				export DBUS_SESSION_BUS_ADDRESS=$(grep -z DBUS_SESSION_BUS_ADDRESS /proc/$PID/environ | tr '\0' '\n' | cut -d= -f2-)
			fi
			gsettings set org.gnome.desktop.background picture-uri file://"$1"
			log "Wallpaper has been set to $1"
		else
			log "Wallpaper is already $1, no changes made" 0 0 1
		fi
	else
		log "Wallpaper argument is empty, no changes made" 0 0 1
	fi
}

# Changes the Mailspring theme to the provided string if a Mailspring config can be found (indicating it is installed)
# If not installed or if no theme provided, does nothing (does NOT throw an error)
# Warning: This abruptly kills the Mailspring process and restarts it in the background
changeMailSpringThemeIfNeeded() {
	if [ ! -z "$1" ]; then
		MAILSPRING_CONFIG_FILE=~/.config/Mailspring/config.json
		if [ ! -f "$MAILSPRING_CONFIG_FILE" ]; then	MAILSPRING_CONFIG_FILE=~/snap/mailspring/common/config.json; fi
		if [ -f "$MAILSPRING_CONFIG_FILE" ] && [ ! -z "$1" ]; then
			CURRENT_MAILSPRING_THEME="$(cat "$MAILSPRING_CONFIG_FILE" | grep \"theme\": | tr -d ' ' | tail -c +10 | head -c -3)"
			if [ "$CURRENT_MAILSPRING_THEME" != "$1" ]; then
				sed -i "s/\"theme\":.*/\"theme\": \"$1\",/g" "$MAILSPRING_CONFIG_FILE"
				log "Mailspring theme has been set to $1"
				pkill -f mailspring > /dev/null 2>&1
				log "Mailspring process has been killed"
				mailspring -b </dev/null &>/dev/null &
				log "Mailspring process has been started in background"
			else
				log "Mailspring theme is already $1, no changes made" 0 0 1
			fi
		else
			log "Mailspring not installed, no changes made" 0 0 1
		fi
	else
		log "Mailspring theme argument is empty, no changes made" 0 0 1
	fi
}

# First, installs the current system theme into the Flatpak runtimes used by all non-curated (non-appcenter) apps (if not already installed)
# If the current theme is an elementary theme (io.elementary.stylesheet.*) and if the $1 argument is 1, it makes these changes before installing the theme:
# - Renames it by adding a -dark suffix
# - Modifies it so the default stylesheet is dark themed; this is needed as elementary themes do not have traditional separate dark variants
# Then, forces all the apps to use the current theme by adding an environment variable override (if not already set)
changeNonElementaryFlatpakThemesIfNeeded() {
	# The location of Flatpak runtimes
	FLATPAK_RUNTIME_DIR=~/.local/share/flatpak/runtime
	# Where themes are stored in a Flatpak runtime
	RUNTIME_THEME_SUBDIR='active/files/share/themes'
	# Grab the current system theme
	THEME="$(gsettings get org.gnome.desktop.interface gtk-theme | head -c -2 | tail -c +2)"
	# Set the variable that indicates whether to add the '-dark' prefix to the theme based on the $1 argument and whether the current theme is an elementary one
	USE_CUSTOM_ELEMENTARY_DARK="$([ "$1" == 1 ] && [ ! -z "$(echo "$THEME" | grep -e "^io\.elementary\.stylesheet\..*")" ] && echo 1 || echo 0)"
	# Grab the list of app IDs for all non-appcenter installed Flatpaks
	TARGET_APP_IDS=($(flatpak list --columns=application,origin,runtime | awk -F "\t" '{if ($2 != "appcenter"  && $3 != "") print $1}'))
	# For each target app ID...
	for APP_ID in "${TARGET_APP_IDS[@]}"; do
		# Grab the appropriate Flatpak runtime
		RUNTIME="$(flatpak info --show-runtime "$APP_ID")"
		# Ensure the runtime has a theme directory
		RUNTIME_THEME_DIR="$FLATPAK_RUNTIME_DIR"/"$RUNTIME"/"$RUNTIME_THEME_SUBDIR"
		if [ ! -d "$RUNTIME_THEME_DIR" ]; then mkdir -p "$RUNTIME_THEME_DIR"; fi
		# Check to see if the current theme (or the current theme plus the '-dark' suffix if needed) is already installed in the runtime
		THEME_IN_RUNTIME_SEARCH_RESULT="$([ "$USE_CUSTOM_ELEMENTARY_DARK" -eq 1 ] && echo "$(ls "$RUNTIME_THEME_DIR" | grep "$THEME"-dark)" || echo "$(ls "$RUNTIME_THEME_DIR" | grep "$THEME")")"
		# If not, find where the theme is stored (in the system or user directory) and copy it into the runtime theme folder
		# Add '-dark' suffix to it if needed and make the necessary changes
		if [ -z "$THEME_IN_RUNTIME_SEARCH_RESULT" ]; then
			# Find where the theme is stored
			TARGET_THEME_LOCATION=''
			POSSIBLE_THEME_LOCATIONS=(/usr/share/themes ~/.local/share/themes)
			for LOCATION in "${POSSIBLE_THEME_LOCATIONS[@]}"; do
				if [ ! -z "$(ls "$LOCATION" | grep -e ^"$THEME"$)" ]; then TARGET_THEME_LOCATION="$LOCATION"/"$THEME"; fi
			done
			[ ! -z "$TARGET_THEME_LOCATION" ] || log "Location of the currently set theme - $THEME - could not be found" 1 1
			# If there is not need to make the '-dark' modifications, copy the theme into the Flatpak runtime; else, modify it in a temporary directory first, then copy it
			if [ ! "$USE_CUSTOM_ELEMENTARY_DARK" -eq 1 ]; then
				cp -r "$TARGET_THEME_LOCATION" "$RUNTIME_THEME_DIR"
				log "$THEME theme has been installed into $RUNTIME Flatpak runtime"
			else
				TEMP_DIR="$(mktemp -d)"
				cp -r "$TARGET_THEME_LOCATION" "$TEMP_DIR"
				cp -r "$TEMP_DIR"/"$THEME" "$TEMP_DIR"/"$THEME"-dark
				mv "$TEMP_DIR"/"$THEME"-dark/plank "$TEMP_DIR"/"$THEME"-dark/plank-light
				mv "$TEMP_DIR"/"$THEME"-dark/plank-dark "$TEMP_DIR"/"$THEME"-dark/plank
				mv "$TEMP_DIR"/"$THEME"-dark/gtk-3.0/gtk.css "$TEMP_DIR"/"$THEME"-dark/gtk-3.0/gtk-light.css
				mv "$TEMP_DIR"/"$THEME"-dark/gtk-3.0/gtk-dark.css "$TEMP_DIR"/"$THEME"-dark/gtk-3.0/gtk.css
				cp -r "$TEMP_DIR"/"$THEME"-dark "$RUNTIME_THEME_DIR"
				rm -r "$TEMP_DIR"
				log "$THEME theme has been modified to $THEME-dark and installed into $RUNTIME Flatpak runtime"
			fi
		else
			log "$THEME theme is already installed in the $RUNTIME Flatpak runtime, no changes made" 0 0 1
		fi
		# Now that the theme is installed, do the override if needed
		CURRENT_APP_THEME="$(flatpak override --user --show "$APP_ID" | grep GTK_THEME= | tail -c +11)"
		FINAL_OVERRIDE_THEME_NAME="$([ "$USE_CUSTOM_ELEMENTARY_DARK" == 1 ] && echo "$(echo "$THEME" | head -c -1 | tail -c +1)-dark" || echo "$THEME")"
		if [ "$CURRENT_APP_THEME" != "$FINAL_OVERRIDE_THEME_NAME" ]; then
			flatpak override --user --env=GTK_THEME="$FINAL_OVERRIDE_THEME_NAME" "$APP_ID"
			log "Flatpak environment variable override 'GTK_THEME=$FINAL_OVERRIDE_THEME_NAME' has been added for $APP_ID"
		else
			log "Flatpak environment variable override 'GTK_THEME=$FINAL_OVERRIDE_THEME_NAME' is already set for $APP_ID, no changes made" 0 0 1
		fi
	done
}


# =======================================
# Actual execution
# =======================================

# 1. Change the universal GTK dark theme preference if needed
# 2. Change the wallpaper if needed
# 3. Change the Mailspring theme if needed
# 4. Change the theme of all non-elementary Flatpak apps if needed

SYSTEM_DARK_PREF="$(getSystemDarkStylePref)"
changeGTKUniversalDarkPrefIfNeeded "$SYSTEM_DARK_PREF"
changeWallpaperIfNeeded "$([ "$SYSTEM_DARK_PREF" == 1 ] && echo "$DARK_THEME_WALLPAPER" || echo "$LIGHT_THEME_WALLPAPER")"
changeMailSpringThemeIfNeeded "$([ "$SYSTEM_DARK_PREF" == 1 ] && echo "$MAILSPRING_DARK_THEME" || echo "$MAILSPRING_LIGHT_THEME")"
changeNonElementaryFlatpakThemesIfNeeded "$SYSTEM_DARK_PREF"
	#!/usr/bin/bash


	# =======================================
	# eOS-Universal-Dark-Style
	# =======================================

	# elementaryOS 6 has great dark themes, but they only apply to "curated" appcenter apps
	# This script forces the system theme to work with regular Debian packages as well as non-curated Flatpak apps
	# It also optionally changes the wallpaper based on the theme
	# It also supports changing themes for the Mailspring email app (both .deb and Snap versions)


	# =======================================
	# Instructions
	# =======================================

	# 1. Save this script and make it executable
	# 2. Change the configuration variables below as needed
	# 3. Use a cron job to run the script automatically on a desired schedule; you can learn about cron by running `man crontab` in a terminal
	# Note that system updates can reset the forced Flatpak theming, so running the script frequently (every few minutes) is recommended

	# =======================================
	# Configuration
	# =======================================

	#LIGHT_THEME_WALLPAPER='/usr/share/backgrounds/odin.jpg' # Leave empty to disable wallpaper switching on light theme
	#DARK_THEME_WALLPAPER='/usr/share/backgrounds/odin-dark.jpg' # Leave empty to disable wallpaper switching on dark theme
	#MAILSPRING_LIGHT_THEME='ui-light' # Leave empty to disable Mailspring theme switching on light theme
	#MAILSPRING_DARK_THEME='ui-dark' # Leave empty to disable Mailspring theme switching on dark theme
	SHOW_DEBUG_MESSAGES=0 # If debug logs should be printed, set to 1


	# =======================================
	# Script functions
	# =======================================

	# Echoes provided string with a date prefix. If $2 is 1, redirects to stderr with ERROR prefix. If $3 is 1, echoes a crash message to stderr and exits with code 1
	# If $4 is 1, the message is treated as a debug log (only shown if the relevant configuration variable above is set)
	log() {
	if [ "$2" == 1 ]; then
	echo -e "ERROR: $(date): $1" >&2
	elif [ "$4" == 1 ]; then
	if [ "$SHOW_DEBUG_MESSAGES" == 1 ]; then
	echo -e "DEBUG: $(date): $1"
	fi
	else
	echo -e "MESSG: $(date): $1"
	fi
	if [ "$3" == 1 ]; then
	echo -e "CRASHED." >&2
	exit 1
	fi

	}

	# Echoes 1 if the system dark style is set, 0 otherwise
	getSystemDarkStylePref() {
	#[ "$(gsettings get org.freedesktop prefers-color-scheme)" = "'dark'" ] && echo 1 \|\| echo 0
	echo 1
	}

	# Changes the universal GTK dark theme preference based on the provided argument (if they are different)
	changeGTKUniversalDarkPrefIfNeeded() {
	# Ensure the provided argument is valid before making the change
	echo "$1 HI"
	[ "$1" == 0 ] \|\| [ "$1" == 1 ] \|\| log "GTK universal dark preference can only be set to 0 or 1" 1 1
	# The location of the universal GTK dark preference config file
	GTK_UNIVERSAL_PREF_FILE=~/.config/gtk-3.0/settings.ini
	# Ensure the file exists (if not, create it)
	if [ ! -f "$GTK_UNIVERSAL_PREF_FILE" ]; then
	echo -e '[Settings]\ngtk-application-prefer-dark-theme=1\n' > "$GTK_UNIVERSAL_PREF_FILE"
	fi
	# Grab the pref
	GTK_UNIVERSAL_PREF_IS_DARK="$(cat "$GTK_UNIVERSAL_PREF_FILE" \| grep -o [0-1])"
	# If needed, make the change
	if [ "$GTK_UNIVERSAL_PREF_IS_DARK" != "$1" ]; then
	sed -i "s/gtk-application-prefer-dark-theme=.*/gtk-application-prefer-dark-theme=$1/" "$GTK_UNIVERSAL_PREF_FILE"
	log "GTK universal dark preference has been set to $1"
	else
	log "GTK universal dark preference is already $1, no changes made" 0 0 1
	fi
	}

	# Changes the wallpaper to the one given in the argument (if not already set)
	# If the argument is empty, does nothing (does NOT throw an error)
	changeWallpaperIfNeeded() {
	if [ ! -z "$1" ]; then
	CURRENT_WALLPAPER="$(gsettings get org.gnome.desktop.background picture-uri \| head -c -2 \| tail -c +9)"
	if [ "$CURRENT_WALLPAPER" != "$1" ]; then
	# This if statement allows the wallpaper change to work even when running from a cron job
	if [ -z "$DBUS_SESSION_BUS_ADDRESS" ]; then
	PID=$(pgrep gnome-session)
	export DBUS_SESSION_BUS_ADDRESS=$(grep -z DBUS_SESSION_BUS_ADDRESS /proc/$PID/environ \| tr '\0' '\n' \| cut -d= -f2-)
	fi
	gsettings set org.gnome.desktop.background picture-uri file://"$1"
	log "Wallpaper has been set to $1"
	else
	log "Wallpaper is already $1, no changes made" 0 0 1
	fi
	else
	log "Wallpaper argument is empty, no changes made" 0 0 1
	fi
	}

	# Changes the Mailspring theme to the provided string if a Mailspring config can be found (indicating it is installed)
	# If not installed or if no theme provided, does nothing (does NOT throw an error)
	# Warning: This abruptly kills the Mailspring process and restarts it in the background
	changeMailSpringThemeIfNeeded() {
	if [ ! -z "$1" ]; then
	MAILSPRING_CONFIG_FILE=~/.config/Mailspring/config.json
	if [ ! -f "$MAILSPRING_CONFIG_FILE" ]; then MAILSPRING_CONFIG_FILE=~/snap/mailspring/common/config.json; fi
	if [ -f "$MAILSPRING_CONFIG_FILE" ] && [ ! -z "$1" ]; then
	CURRENT_MAILSPRING_THEME="$(cat "$MAILSPRING_CONFIG_FILE" \| grep \"theme\": \| tr -d ' ' \| tail -c +10 \| head -c -3)"
	if [ "$CURRENT_MAILSPRING_THEME" != "$1" ]; then
	sed -i "s/\"theme\":.*/\"theme\": \"$1\",/g" "$MAILSPRING_CONFIG_FILE"
	log "Mailspring theme has been set to $1"
	pkill -f mailspring > /dev/null 2>&1
	log "Mailspring process has been killed"
	mailspring -b </dev/null &>/dev/null &
	log "Mailspring process has been started in background"
	else
	log "Mailspring theme is already $1, no changes made" 0 0 1
	fi
	else
	log "Mailspring not installed, no changes made" 0 0 1
	fi
	else
	log "Mailspring theme argument is empty, no changes made" 0 0 1
	fi
	}

	# First, installs the current system theme into the Flatpak runtimes used by all non-curated (non-appcenter) apps (if not already installed)
	# If the current theme is an elementary theme (io.elementary.stylesheet.*) and if the $1 argument is 1, it makes these changes before installing the theme:
	# - Renames it by adding a -dark suffix
	# - Modifies it so the default stylesheet is dark themed; this is needed as elementary themes do not have traditional separate dark variants
	# Then, forces all the apps to use the current theme by adding an environment variable override (if not already set)
	changeNonElementaryFlatpakThemesIfNeeded() {
	# The location of Flatpak runtimes
	FLATPAK_RUNTIME_DIR=~/.local/share/flatpak/runtime
	# Where themes are stored in a Flatpak runtime
	RUNTIME_THEME_SUBDIR='active/files/share/themes'
	# Grab the current system theme
	THEME="$(gsettings get org.gnome.desktop.interface gtk-theme \| head -c -2 \| tail -c +2)"
	# Set the variable that indicates whether to add the '-dark' prefix to the theme based on the $1 argument and whether the current theme is an elementary one
	USE_CUSTOM_ELEMENTARY_DARK="$([ "$1" == 1 ] && [ ! -z "$(echo "$THEME" \| grep -e "^io\.elementary\.stylesheet\..*")" ] && echo 1 \|\| echo 0)"
	# Grab the list of app IDs for all non-appcenter installed Flatpaks
	TARGET_APP_IDS=($(flatpak list --columns=application,origin,runtime \| awk -F "\t" '{if ($2 != "appcenter" && $3 != "") print $1}'))
	# For each target app ID...
	for APP_ID in "${TARGET_APP_IDS[@]}"; do
	# Grab the appropriate Flatpak runtime
	RUNTIME="$(flatpak info --show-runtime "$APP_ID")"
	# Ensure the runtime has a theme directory
	RUNTIME_THEME_DIR="$FLATPAK_RUNTIME_DIR"/"$RUNTIME"/"$RUNTIME_THEME_SUBDIR"
	if [ ! -d "$RUNTIME_THEME_DIR" ]; then mkdir -p "$RUNTIME_THEME_DIR"; fi
	# Check to see if the current theme (or the current theme plus the '-dark' suffix if needed) is already installed in the runtime
	THEME_IN_RUNTIME_SEARCH_RESULT="$([ "$USE_CUSTOM_ELEMENTARY_DARK" -eq 1 ] && echo "$(ls "$RUNTIME_THEME_DIR" \| grep "$THEME"-dark)" \|\| echo "$(ls "$RUNTIME_THEME_DIR" \| grep "$THEME")")"
	# If not, find where the theme is stored (in the system or user directory) and copy it into the runtime theme folder
	# Add '-dark' suffix to it if needed and make the necessary changes
	if [ -z "$THEME_IN_RUNTIME_SEARCH_RESULT" ]; then
	# Find where the theme is stored
	TARGET_THEME_LOCATION=''
	POSSIBLE_THEME_LOCATIONS=(/usr/share/themes ~/.local/share/themes)
	for LOCATION in "${POSSIBLE_THEME_LOCATIONS[@]}"; do
	if [ ! -z "$(ls "$LOCATION" \| grep -e ^"$THEME"$)" ]; then TARGET_THEME_LOCATION="$LOCATION"/"$THEME"; fi
	done
	[ ! -z "$TARGET_THEME_LOCATION" ] \|\| log "Location of the currently set theme - $THEME - could not be found" 1 1
	# If there is not need to make the '-dark' modifications, copy the theme into the Flatpak runtime; else, modify it in a temporary directory first, then copy it
	if [ ! "$USE_CUSTOM_ELEMENTARY_DARK" -eq 1 ]; then
	cp -r "$TARGET_THEME_LOCATION" "$RUNTIME_THEME_DIR"
	log "$THEME theme has been installed into $RUNTIME Flatpak runtime"
	else
	TEMP_DIR="$(mktemp -d)"
	cp -r "$TARGET_THEME_LOCATION" "$TEMP_DIR"
	cp -r "$TEMP_DIR"/"$THEME" "$TEMP_DIR"/"$THEME"-dark
	mv "$TEMP_DIR"/"$THEME"-dark/plank "$TEMP_DIR"/"$THEME"-dark/plank-light
	mv "$TEMP_DIR"/"$THEME"-dark/plank-dark "$TEMP_DIR"/"$THEME"-dark/plank
	mv "$TEMP_DIR"/"$THEME"-dark/gtk-3.0/gtk.css "$TEMP_DIR"/"$THEME"-dark/gtk-3.0/gtk-light.css
	mv "$TEMP_DIR"/"$THEME"-dark/gtk-3.0/gtk-dark.css "$TEMP_DIR"/"$THEME"-dark/gtk-3.0/gtk.css
	cp -r "$TEMP_DIR"/"$THEME"-dark "$RUNTIME_THEME_DIR"
	rm -r "$TEMP_DIR"
	log "$THEME theme has been modified to $THEME-dark and installed into $RUNTIME Flatpak runtime"
	fi
	else
	log "$THEME theme is already installed in the $RUNTIME Flatpak runtime, no changes made" 0 0 1
	fi
	# Now that the theme is installed, do the override if needed
	CURRENT_APP_THEME="$(flatpak override --user --show "$APP_ID" \| grep GTK_THEME= \| tail -c +11)"
	FINAL_OVERRIDE_THEME_NAME="$([ "$USE_CUSTOM_ELEMENTARY_DARK" == 1 ] && echo "$(echo "$THEME" \| head -c -1 \| tail -c +1)-dark" \|\| echo "$THEME")"
	if [ "$CURRENT_APP_THEME" != "$FINAL_OVERRIDE_THEME_NAME" ]; then
	flatpak override --user --env=GTK_THEME="$FINAL_OVERRIDE_THEME_NAME" "$APP_ID"
	log "Flatpak environment variable override 'GTK_THEME=$FINAL_OVERRIDE_THEME_NAME' has been added for $APP_ID"
	else
	log "Flatpak environment variable override 'GTK_THEME=$FINAL_OVERRIDE_THEME_NAME' is already set for $APP_ID, no changes made" 0 0 1
	fi
	done
	}


	# =======================================
	# Actual execution
	# =======================================

	# 1. Change the universal GTK dark theme preference if needed
	# 2. Change the wallpaper if needed
	# 3. Change the Mailspring theme if needed
	# 4. Change the theme of all non-elementary Flatpak apps if needed

	SYSTEM_DARK_PREF="$(getSystemDarkStylePref)"
	changeGTKUniversalDarkPrefIfNeeded "$SYSTEM_DARK_PREF"
	changeWallpaperIfNeeded "$([ "$SYSTEM_DARK_PREF" == 1 ] && echo "$DARK_THEME_WALLPAPER" \|\| echo "$LIGHT_THEME_WALLPAPER")"
	changeMailSpringThemeIfNeeded "$([ "$SYSTEM_DARK_PREF" == 1 ] && echo "$MAILSPRING_DARK_THEME" \|\| echo "$MAILSPRING_LIGHT_THEME")"
	changeNonElementaryFlatpakThemesIfNeeded "$SYSTEM_DARK_PREF"