From dc21f39d18a79415689c8038f7af772dc30c1aa2 Mon Sep 17 00:00:00 2001
From: Patrick Spek <p.spek@tyil.nl>
Date: Sun, 7 Mar 2021 21:36:23 +0100
Subject: Update chwp util

---
 .local/bin/chwp | 53 ++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 48 insertions(+), 5 deletions(-)

(limited to '.local')

diff --git a/.local/bin/chwp b/.local/bin/chwp
index 0bec61b..5dacc07 100755
--- a/.local/bin/chwp
+++ b/.local/bin/chwp
@@ -11,7 +11,9 @@ main()
 	directory=${CHWP_BASEDIR:-$HOME/pictures/wallpapers}
 	size=${CHWP_SIZE:-1920x1080}
 	timeout=${1:-0}
-	walldir=$directory/$size
+	walldir="$directory/$size"
+
+	log "main" "Checking $walldir for wallpapers"
 
 	# Fail early if there's no wallpaper directory
 	if [ ! -d "$walldir" ]
@@ -22,11 +24,16 @@ main()
 
 	CACHEFILE="$(mktemp)"
 
+	log "main" "Using $CACHEFILE as CACHEFILE"
+
 	find "${walldir}" -type f > "$CACHEFILE"
 
+	log main "Found $(wc -l "$CACHEFILE" | awk '{ print $1 }') wallpapers"
+
 	# If no timeout was set, just change it once
 	if [ "$timeout" -eq 0 ]
 	then
+		log main "No timeout set, only updating once"
 		set_papes
 		exit
 	fi
@@ -41,37 +48,67 @@ main()
 
 set_papes()
 {
+	log "set_papes" "Gathering wallpapers"
+
 	pape="$(make_pape)"
 
+	log set_papes "Setting wallpaper to $pape"
+
 	feh --bg-fill "$pape"
+
+	log set_papes "Cleaning up temporary wallpaper image"
+
 	rm -f -- "$pape"
 }
 
 make_pape()
 {
+	log "make_pape" "Creating wallpaper"
+
 	output="$(mktemp)"
 	imagelist="$(mktemp)"
 	monitorlist="$(mktemp)"
 
-	xrandr -q | grep -F ' connected ' > "$monitorlist"
+	if [ -z "$CHWP_MONITORS" ]
+	then
+		log "make_pape" "Trying to determine screens"
+
+		xrandr -q \
+			| grep -F ' connected ' \
+			| grep -Eo '[[:digit:]]+x[[:digit:]]+' \
+			> "$monitorlist"
+	else
+		log "make_pape" "Using \$CHWP_MONITORS for monitorlist"
+
+		printf "%s" "$CHWP_MONITORS" \
+			| tr " " "\n" \
+			| grep -v "^$" \
+			> "$monitorlist"
+	fi
 
-	for resolution in $CHWP_MONITORS
+	log "make_pape" "Found $(wc -l "$monitorlist" | awk '{ print $1 }') screen(s)"
+
+	while read -r resolution
 	do
+		log "make_pape" "Adding wallpaper for $resolution sized screen"
+
 		current_pape=$(get_pape "$resolution")
 
 		if [ "$current_pape" = "" ]
 		then
-			printf "No wallpapers for %s\n" "$resolution" >&2
+			log "make_pape" "No wallpapers for $resolution"
 
 			current_pape="$(mktemp --tmpdir XXXXX.png)"
 			convert -size "$resolution" canvas:gray "$current_pape"
+		else
+			log "make_pape" "Using $current_pape"
 		fi
 
 		printf '"%s"\n' "$current_pape" >> "$imagelist"
 
 		unset resolution
 		unset current_pape
-	done
+	done < "$monitorlist"
 
 	# shellcheck disable=SC2046
 	# shellcheck disable=SC2086
@@ -86,10 +123,16 @@ get_pape()
 {
 	if [ ! -d "$directory/$1" ]
 	then
+		log "get_pape" "$directory/$1 does not exist"
 		return 1
 	fi
 
 	printf "%s\n" "$(find "$directory/$1" -type f | shuf | head -n 1)"
 }
 
+log()
+{
+	printf "[%s] %s: %s\n" "$(date +%FT%T)" "$1" "$2" >&2
+}
+
 main "$@"
-- 
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