100 lines
1.6 KiB
Bash
Executable File
100 lines
1.6 KiB
Bash
Executable File
#!/usr/bin/env bash
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readonly PROGRAM_NAME=$(basename "$0")
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readonly PROGRAM_LOC=$(readlink -m "$(dirname $0)")
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readonly ARGS="$@"
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readonly ARG_COUNT="$#"
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LAST_SHA=0
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usage () {
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echo "usage: $PROGRAM_NAME [DIRECTORY] [WAIT_TIME]"
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}
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error () {
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local readonly message=$1; shift
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echo "$PROGRAM_NAME: $message"
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usage
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exit 1
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}
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current_sha () {
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ls -lR "$DIRECTORY" \
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| sha1sum
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}
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sha_changed? () {
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[[ "$(current_sha)" != "$LAST_SHA" ]]
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}
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update_sha () {
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LAST_SHA=$(current_sha)
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}
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alert_update () {
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now=$(date +"%Y-%m-%d %I:%M:%S")
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echo "[$now] Directory Updated"
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}
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directory? () {
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local readonly directory=$1; shift
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[[ -d $directory ]]
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}
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integer? () {
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local readonly number=$1; shift
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[[ $number =~ ^[0-9]+$ ]]
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}
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empty? () {
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local var=$1; shift
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[[ -z $var ]]
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}
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check_arguments () {
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if empty? "$DIRECTORY" || empty? "$WAIT_TIME"; then
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error "missing operand"
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fi
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if ! directory? "$DIRECTORY"; then
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error "$DIRECTORY is not a directory"
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fi
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if ! integer? "$WAIT_TIME"; then
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error "$WAIT_TIME is not an integer"
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fi
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}
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run () {
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while true; do
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if sha_changed?; then
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update_sha
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alert_update
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fi
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sleep "$WAIT_TIME"
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done
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}
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main () {
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local readonly d=$1; shift
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local readonly w=$1; shift
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readonly DIRECTORY=${d:-$(pwd)}
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readonly WAIT_TIME=${w:-15}
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check_arguments
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update_sha
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echo "--------------------------------------------------------------------------------"
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echo "+ Monitoring $DIRECTORY at interval $WAIT_TIME seconds"
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echo "--------------------------------------------------------------------------------"
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run
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}
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main $ARGS
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