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| #!/bin/bash -e | |
| # | |
| # Author: Werner Beroux <werner@beroux.com> | |
| # Help? | |
| if [[ $# -eq 0 || $1 == --help || $1 == -h ]] | |
| then | |
| echo "inotifyexec version 1.1.0" | |
| echo "Requires inotify-tools." | |
| echo "" | |
| echo "Usage: inotifyexec <command> <inotifywait arguments...>" | |
| echo "Example: inotifyexec make -r . -e modify,create,delete --exclude '*.swp'" | |
| echo "" | |
| echo "Once watch established, press Ctrl + C once to shutdown the watch cleanly." | |
| if [[ $# -eq 0 ]] | |
| then | |
| exit 1 | |
| else | |
| exit 0 | |
| fi | |
| fi | |
| exec_command=$1 | |
| shift | |
| trigger_tmp_file=$(mktemp) | |
| lock_tmp_file=$(mktemp) | |
| # Listen to a single file changes, should be the temporary file changes. | |
| inotify_single_file() { | |
| while inotifywait -qq -e attrib $trigger_tmp_file | |
| do | |
| # Create the lock after all touch even have passed. | |
| sleep 0.5 | |
| touch $lock_tmp_file | |
| # Execute the desired command. | |
| set +e | |
| $exec_command | |
| set -e | |
| # Delete the lock | |
| rm -rf $lock_tmp_file | |
| done | |
| } | |
| # Fork a listener on the temporary file. | |
| inotify_single_file & | |
| rm -rf $lock_tmp_file | |
| # Keep listening to the desired directory: | |
| # Each change will touch the temporary file again. | |
| inotifywait --monitor $* | while read dir ev file | |
| do | |
| # If there is a lock wait until it's unlocked | |
| if [[ -e $lock_tmp_file ]] | |
| then | |
| inotifywait -qq -e delete $lock_tmp_file || true | |
| # Wait until watch has been established again | |
| sleep 0.2 | |
| fi | |
| # Tell a change happened. | |
| touch $trigger_tmp_file | |
| done | |
| rm -f $trigger_tmp_file 2> /dev/null | |
| rm -f $lock_tmp_file 2> /dev/null |
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