Add option to copy wallpaper to a file instead of setting the wallpaper

dwall.sh

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 
-## Author  : Aditya Shakya (adi1090x)
-## Mail    : adi1090x@gmail.com
-## Github  : @adi1090x
-## Twitter : @adi1090x
+## Author  : Aditya Shakya (adi1090x), GitGangGuy
+## Mail    : adi1090x@gmail.com, -
+## Github  : @adi1090x, @GitGangGuy
+## Twitter : @adi1090x, -
 
 ## Dynamic Wallpaper : Set wallpapers according to current time.
 ## Created to work better with job schedulers (cron)
@@ -44,7 +44,7 @@ trap exit_on_signal_SIGTERM SIGTERM
 
 ## Prerequisite
 Prerequisite() { 
-    dependencies=(feh xrandr crontab)
+    dependencies=(feh xrandr crontab xargs)
     for dependency in "${dependencies[@]}"; do
         type -p "$dependency" &>/dev/null || {
             echo -e ${RED}"[!] ERROR: Could not find ${GREEN}'${dependency}'${RED}, is it installed?" >&2
@@ -59,18 +59,22 @@ usage() {
     cat <<- EOF
 		${RED}╺┳┓╻ ╻┏┓╻┏━┓┏┳┓╻┏━╸   ${GREEN}╻ ╻┏━┓╻  ╻  ┏━┓┏━┓┏━┓┏━╸┏━┓
 		${RED} ┃┃┗┳┛┃┗┫┣━┫┃┃┃┃┃     ${GREEN}┃╻┃┣━┫┃  ┃  ┣━┛┣━┫┣━┛┣╸ ┣┳┛
-		${RED}╺┻┛ ╹ ╹ ╹╹ ╹╹ ╹╹┗━╸   ${GREEN}┗┻┛╹ ╹┗━╸┗━╸╹  ╹ ╹╹  ┗━╸╹┗╸${WHITE}
+		${RED}╺┻┛ ╹ ╹ ╹╹ ╹╹ ╹╹┗━╸   ${GREEN}┗┻┛╹ ╹┗━╸┗━╸╹  ╹ ╹╹  ┗━╸╹┗╸
+		${CYAN}[ I M P R O V E D ]${WHITE}
 
-		Dwall V2.0   : Set wallpapers according to current time.
-		Developed By : Aditya Shakya (@adi1090x)
-			
-		Usage : `basename $0` [-h] [-p] [-s style]
+		A bash script to adapt your wallpaper to the time
+		By Aditya Shakya (@adi1090x) and GitGangGuy
+
+		Usage                            `basename $0` [ -h ] [ -p [ -b backend ] [ -a | -l ] ] [ -s style ] [ -o output ]
 
 		Options:
-		   -h	Show this help message
-		   -p	Use pywal to set wallpaper
-		   -s	Name of the style to apply
-
+		  -h                             Show this help message
+		  -p                             Use pywal to set wallpaper
+		    -b                           Pass a backend to pywal (optional)
+		    -l                           Force light color scheme
+		    -a                           Automatically set light/dark color scheme based on GNOME theme or daytime
+		  -s                             Name of the style to apply
+      -o                             Output wallpaper to file instead of setting it
 	EOF
 
 	styles=(`ls $DIR`)
@@ -79,10 +83,13 @@ usage() {
 	printf -- '\n\n'${WHITE}
 
     cat <<- EOF
-		Examples: 
-		`basename $0` -s beach        Set wallpaper from 'beach' style
-		`basename $0` -p -s sahara    Set wallpaper from 'sahara' style using pywal
-
+		Examples:
+		`basename $0` -s beach                   Set 'beach' style wallpaper
+		`basename $0` -s beach -o ~/.wallpaper   Save 'beach' style wallpaper into file '~/.wallpaper'
+		`basename $0` -p -s sahara               Set 'beach' style wallpaper, and refresh the pywal theme
+		`basename $0` -p -b colorz -s sahara     " with 'colorz' backend
+		`basename $0` -p -b colorz -s sahara -a    " with automatic light/dark mode
+		`basename $0` -p -b colorz -s sahara -l    " with forced light mode
 	EOF
 }
 
@@ -106,6 +113,11 @@ set_cinnamon() {
 	 gsettings set org.cinnamon.desktop.background picture-uri "file:///$1"
 }
 
+## Set wallpaper in GNOME
+set_gnome() {
+	gsettings set org.gnome.desktop.background picture-uri "file:///$1"
+	gsettings set org.gnome.desktop.screensaver picture-uri "file:///$1"
+}
 ## For XFCE only
 if [[ "$OSTYPE" == "linux"* ]]; then
 	SCREEN="$(xrandr --listactivemonitors | awk -F ' ' 'END {print $1}' | tr -d \:)"
@@ -128,7 +140,7 @@ case "$OSTYPE" in
 			elif [[ "$DESKTOP_SESSION" =~ ^(/usr/share/xsessions/plasma|NEON|Neon|neon|PLASMA|Plasma|plasma|KDE|Kde|kde)$ ]]; then
 				SETTER=set_kde
 			elif [[ "$DESKTOP_SESSION" =~ ^(PANTHEON|Pantheon|pantheon|GNOME|Gnome|gnome|Gnome-xorg|gnome-xorg|UBUNTU|Ubuntu|ubuntu|DEEPIN|Deepin|deepin|POP|Pop|pop)$ ]]; then
-				SETTER="gsettings set org.gnome.desktop.background picture-uri"
+				SETTER=set_gnome
 			else 
 				SETTER="feh --bg-fill"
 			fi
@@ -150,17 +162,59 @@ get_img() {
 	fi
 }
 
+## Check valid pywal backend
+pywal_backend() {
+	backends=$(wal --backend | tail -n +2 | cut -d ' ' -f 3 | xargs)
+	[[ "$backends" =~ (^| )"$1"($| ) ]] && return 0 || return 1
+}
+
+## Determine light/dark scheme based on GNOME night light or daytime
+pywal_light() {
+	[[ $WALSCHEME == 'light' ]] && return 0
+	if [[ $WALSCHEME == 'auto' ]]; then
+		[[ $DESKTOP_SESSION =~ ^(GNOME|Gnome|gnome|Gnome-xorg|gnome-xorg)$ && $(gsettings get org.gnome.desktop.interface gtk-theme) != *"dark"* ]] && return 0
+		(( $HOUR > 6 && $HOUR < 18 )) && return 0
+	fi
+	return 1
+}
+
 ## Set wallpaper with pywal
 pywal_set() {
 	get_img "$1"
+	if ! pywal_backend "$2"; then
+		echo -e ${RED}"[!] $2 is not a valid pywal backend. Check valid backends with `wal --backend`. Exiting..."
+		{ reset_color; exit 1; }
+	fi
 	if [[ -x `command -v wal` ]]; then
-		wal -i "$image.$FORMAT"
+		local walcmd=(wal --backend "$2" -i "$image.$FORMAT" -n)
+		if pywal_light; then
+			walcmd+=(-l)
+		fi
+		"${walcmd[@]}"
+		set_wallpaper "$1"
 	else
 		echo -e ${RED}"[!] pywal is not installed on your system, exiting..."
 		{ reset_color; exit 1; }
 	fi
 }
 
+## Put wallpaper in $OUTPUT
+file_set() {
+	get_img "$1"
+	if [[ -n $(echo "$OUTPUT" | grep -o "^[/~]") ]]
+	then
+		DIR=$(dirname $OUTPUT)
+		if [[ -d $DIR ]]
+		then
+			cp "$image.$FORMAT" "$OUTPUT"
+		else
+			echo "[!] Directory $DIR does not exist, exiting..."
+		fi
+	else
+		echo "[!] Output must be an absolute path, $OUTPUT isn't, exiting..."
+	fi
+}
+
 ## Wallpaper Setter
 set_wallpaper() {
 	cfile="$HOME/.cache/dwall_current"
@@ -205,21 +259,37 @@ main() {
 	num=$(($HOUR/1))
 	# set wallpaper accordingly
 	if [[ -n "$PYWAL" ]]; then
-		{ pywal_set "$num"; reset_color; exit 0; }
+		_walbackend=${WALBACKEND:-wal}
+		{ pywal_set "$num" "$_walbackend"; reset_color; exit 0; }
+	elif [[ -n "$OUTPUT" ]]; then
+		{ file_set "$num"; reset_color; exit 0; }
 	else
 		{ set_wallpaper "$num"; reset_color; exit 0; }
 	fi
 }
 
+WALSCHEME='dark'
 ## Get Options
-while getopts ":s:hp" opt; do
+while getopts ":hplas:b:o:" opt; do
 	case ${opt} in
 		p)
 			PYWAL=true
 			;;
+		o)
+			OUTPUT=$OPTARG
+      ;;
+		b)
+			WALBACKEND=$OPTARG
+			;;
 		s)
 			STYLE=$OPTARG
 			;;
+		l)
+			WALSCHEME='light'
+			;;
+		a)
+			WALSCHEME='auto'
+			;;
 		h)
 			{ usage; reset_color; exit 0; }
 			;;

images/bigsur/1.jpg

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+0.jpg

images/bigsur/10.jpg

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+9.jpg

images/bigsur/11.jpg

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+9.jpg

images/bigsur/12.jpg

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+9.jpg

images/bigsur/14.jpg

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+13.jpg

images/bigsur/15.jpg

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+13.jpg

images/bigsur/16.jpg

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+13.jpg

images/bigsur/2.jpg

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+0.jpg

images/bigsur/20.jpg

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+0.jpg

images/bigsur/21.jpg

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+0.jpg

images/bigsur/22.jpg

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+0.jpg

images/bigsur/23.jpg

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+0.jpg

images/bigsur/3.jpg

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+0.jpg

images/bigsur/4.jpg

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+0.jpg

images/bigsur/5.jpg

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+0.jpg

images/bigsur/9.jpg

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+8.jpg