Add shellcheck-action, fix shellcheck-errors (#206)

.github/workflows/shellcheck.yml

@@ -0,0 +1,16 @@
+name: ShellCheck
+
+on: [push, pull_request]
+
+jobs:
+  shellcheck:
+    name: ShellCheck
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Run ShellCheck
+        uses: ludeeus/action-shellcheck@master
+        with:
+          severity: style

betterlockscreen

@@ -6,7 +6,7 @@
 
 # find your resolution so images can be resized to match your screen resolution
 res=$(xdpyinfo | grep dimensions | sed -r 's/^[^0-9]*([0-9]+x[0-9]+).*$/\1/')
-default_timeout="$(cut -d ' ' -f4 <<< $(xset q | sed -n '25p'))"
+default_timeout="$(cut -d ' ' -f4 <<< "$(xset q | sed -n '25p')")"
 default_dpms=$(xset q | awk '/^[[:blank:]]*DPMS is/ {print $(NF)}')
 
 init_filenames() {
@@ -34,6 +34,7 @@ init_filenames() {
 	# override defaults with config
 	theme_rc="$HOME/.config/betterlockscreenrc"
 	if [ -e "$theme_rc" ]; then
+		# shellcheck disable=SC1090
 		source "$theme_rc"
 	fi
 
@@ -41,7 +42,7 @@ init_filenames() {
 	res_folder="$HOME/.cache/i3lock/$1"
 	folder="$HOME/.cache/i3lock/current"
 	echo "Got" "$@" "$res_folder"
-	if [ ! -d "$folder" -o -n "$2" ]; then
+	if [ ! -d "$folder" ] || [ -n "$2" ]; then
 		rm -rf "$folder"
 		mkdir -p "$res_folder"
 		ln -s "$res_folder" "$folder"
@@ -74,10 +75,10 @@ init_filenames "$res"
 
 
 prelock() {
-	if [ ! -z "$lock_timeout" ]; then
+	if [ -n "$lock_timeout" ]; then
 		xset dpms "$lock_timeout"
 	fi
-	if [ ! -z "$(pidof dunst)" ]; then
+	if [ -n "$(pidof dunst)" ]; then
 		pkill -u "$USER" -USR1 dunst
 	fi
 }
@@ -86,7 +87,7 @@ prelock() {
 lock() {
 	#$1 image path
 
-	i3lock \
+	i3lock-color \
 		-c 00000000 \
 		-t -i "$1" \
 		--timepos='x+110:h-70' \
@@ -99,19 +100,19 @@ lock() {
 		--radius=20 --ring-width=4 --veriftext='' --wrongtext='' \
 		--verifcolor="$verifcolor" --timecolor="$timecolor" --datecolor="$datecolor" \
 		--time-font="$font" --date-font="$font" --layout-font="$font" --verif-font="$font" --wrong-font="$font" \
-		--noinputtext='' --force-clock --pass-media-keys $lockargs
+		--noinputtext='' --force-clock --pass-media-keys "$lockargs"
 
 }
 
 
 postlock() {
-	if [ ! -z "$lock_timeout" ]; then
+	if [ -n "$lock_timeout" ]; then
 		xset dpms "$default_timeout"
 		if [ "$default_dpms" = "Disabled" ]; then
 			xset -dpms
 		fi
 	fi
-	if [ ! -z "$(pidof dunst)" ] ; then
+	if [ -n "$(pidof dunst)" ] ; then
 		pkill -u "$USER" -USR2 dunst
 	fi
 }
@@ -123,9 +124,10 @@ rec_get_random() {
 		user_input="$dir"
 		return
 	fi
-	dir=("$dir"/*)
+	dirs=("$dir"*)
-	dir="${dir[RANDOM % ${#dir[@]}]}"
+	random_dir="${dirs[RANDOM % ${#dirs[@]}]}"
-	rec_get_random "$dir"
+	rec_get_random "$random_dir"
+	exit 1
 }
 
 
@@ -165,8 +167,8 @@ lockselect() {
 logical_px() {
 	# get dpi value from xrdb
 	local DPI
-	DPI=$(cat ~/.Xresources | grep -oP 'Xft.dpi:\s*\K\d+' | bc)
+	DPI=$(grep -oP 'Xft.dpi:\s*\K\d+' ~/.Xresources | bc)
-	if [ -z "$DPI" ]; then
+	if [ -n "$DPI" ]; then
 		DPI=$(xdpyinfo | sed -En "s/\s*resolution:\s*([0-9]*)x([0-9]*)\s.*/\\$2/p" | head -n1)
 	fi
 
@@ -196,7 +198,7 @@ update() {
 	rectangles=" "
 	SR=$(xrandr --query | grep ' connected' | grep -o '[0-9][0-9]*x[0-9][0-9]*[^ ]*')
 	for RES in $SR; do
-		SRA=(${RES//[x+]/ })
+		SRA=("${RES//[x+]/ }")
 		CX=$((SRA[2] + $(logical_px 25 1)))
 		CY=$((SRA[1] - $(logical_px 30 2)))
 		rectangles+="rectangle $CX,$CY $((CX+$(logical_px 300 1))),$((CY-$(logical_px 80 2))) "