fix fallback directory detection

firefox (probably due to sandboxing) results in /proc-based cwds. This
can be annoying. So swaycwd will now detect if the cwd still is in /proc
and return the fallback dir.

The Fallbackdir (previously was hardcoded to /home/julian) can now be passed via a
command line arg. And since commandline args are parsed now, we can also
print a helptext as well :)

1 files changed, 55 insertions, 1 deletions

diff --git a/swaycwd b/swaycwd
index 6b75d53fca29..5585b6b12925 100644
--- a/swaycwd
+++ b/swaycwd
@@ -1,6 +1,60 @@
 #!/usr/bin/env bash
 
+fallback="$HOME"
+
+# taken from https://stackoverflow.com/questions/192249/how-do-i-parse-command-line-arguments-in-bash
+! PARSED=$(getopt --options="h?f:" --longoptions="fallback:,help" --name "$0" -- "$@")
+if [[ ${PIPESTATUS[0]} -ne 0 ]]; then
+    # e.g. return value is 1
+    #  then getopt has complained about wrong arguments to stdout
+    exit 2
+fi
+
+# helptext 
+usage="$(basename $0) [-h] [-f=/fallback/directory] 
+
+Get Current Working Directory for program under cursor in sway. 
+
+Options: 
+ -h, --help     Print this help text
+ -f, --fallback Set directory to print when error occured (defaults to $HOME)"
+
+# parse args
+eval set -- "$PARSED"
+
+while true; do
+	case "$1" in 
+	-f|--fallback) 
+		fallback="$2"
+		shift 2
+		;;
+	-h|--help)
+		echo "$usage"
+		exit 0
+		;;
+	--)
+		break
+		;;
+	*) 
+		echo "argparse error"
+		exit 1
+		;;
+	esac
+done
+
+# get parent pid of program under cursor
 pid=$(swaymsg -t get_tree | jq '.. | select(.type?) | select(.type=="con") | select(.focused==true).pid')
 ppid=$(pgrep --newest --parent ${pid})
 
-readlink /proc/${ppid}/cwd || echo $HOME
+# get cwd from proc dir
+location=$(readlink /proc/${ppid}/cwd)
+
+if [ "$?" -ne 0 ]; then 
+	# just print out fallback dir on error
+	echo $fallback
+	exit 0
+fi 
+
+# find out if the path points to /proc dir
+# use fallback in that case
+echo $location | grep -q /proc && echo $fallback || echo $location