Add swatch.sh script

my-scripts/shell/swatch.sh

@@ -0,0 +1,40 @@
+# https://gist.github.com/ablacklama/550420c597f9599cf804d57dd6aad131
+
+swatch_usage() {
+    cat <<EOF >&2
+NAME
+       swatch - execute a program periodically with "watch". Supports aliases.
+
+SYNOPSIS
+       swatch [options] command
+
+OPTIONS
+       -n, --interval seconds (default: 1)
+              Specify update interval.  The command will not allow quicker than 
+              0.1 second interval.
+EOF
+}
+
+if [ $# -eq 0 ]; then
+    swatch_usage
+    return 1
+fi
+seconds=1
+
+case "$1" in
+-n)
+    seconds="$2"
+    args=${*:3}
+    ;;
+-h)
+    swatch_usage
+    return 1
+    ;;
+*)
+    seconds=1
+    args=${*:1}
+    ;;
+
+esac
+
+watch --color -n "$seconds" --exec bash -ic "$args || true"