87 lines
2.6 KiB
Bash
Executable file
87 lines
2.6 KiB
Bash
Executable file
#!/usr/bin/env bash
|
|
|
|
_VERSION="0.2.0"
|
|
|
|
function help() {
|
|
I=" "
|
|
cat <<USAGE
|
|
fsw - run a command when a file is modified
|
|
|
|
Usage:
|
|
${I}fsw <command> [filter] [dirs...]
|
|
|
|
${I}command - the specified bash command to eval
|
|
${I}filter - an optional filename filter
|
|
${I}dirs - the directories to watch (defaults to current directory)
|
|
|
|
Advanced:
|
|
${I}Command Variables:
|
|
${I}${I}Your commands have runtime access to some variables associated with the
|
|
${I}${I}${I}inotifywait event enabling further extensibility:
|
|
${I}${I}+ FSW_FILENAME - the name of the file
|
|
${I}${I}+ FSW_DIR - the directory containing the file
|
|
${I}${I}+ FSW_PATH - the full relative path of the file
|
|
${I}${I}+ FSW_FILE_EVENTS - a comma-separated list of the inotify events
|
|
${I}Environment:
|
|
${I}${I}Some customization options exist using environment variables
|
|
${I}${I}${I}due to their uncommon usage.
|
|
${I}${I}+ FSW_EVENTS - the list of events to have inotifywait observe
|
|
|
|
References:
|
|
${I}+ Filter works with grep -P
|
|
${I}+ See inotifywait(1) for FSW_EVENTS options.
|
|
|
|
Examples:
|
|
${I}fsw 'make' '\.c$'
|
|
${I}fsw 'bash \$filename' '\.bash$'
|
|
${I}fsw 'mix test --failed' '.exs?$' lib test
|
|
${I}FSW_EVENTS=open,access fsw 'espeak "Intruder Alert!"' \\
|
|
${I}${I}${I}'.*' /etc/secrets \$HOME/.secrets
|
|
USAGE
|
|
}
|
|
|
|
dbg() {
|
|
if [[ ! -z ${FSW_DEBUG+x} ]]; then
|
|
echo -e "[debug] fsw: $@"
|
|
fi
|
|
}
|
|
|
|
if [[ $1 = '-h' ]] || [[ $1 = '--help' ]] || [[ -z $1 ]]; then
|
|
help
|
|
exit 0
|
|
fi
|
|
|
|
FSW_EVENTS="${FSW_EVENTS:-close_write}"
|
|
dbg "Events: $FSW_EVENTS"
|
|
SHELL_COMMAND="${1}"; shift
|
|
dbg "Command: $SHELL_COMMAND"
|
|
FILTER="${1}"; shift
|
|
dbg "Filter: $FILTER"
|
|
dbg "Directory: ${1}"
|
|
DIRS=("${1:-.}"); shift
|
|
if [[ -e $FILTER ]]; then
|
|
# TODO: this is a sad hack/workaround
|
|
echo "It looks like your filter is an actual file. I'll just watch that for you."
|
|
DIRS=("${FILTER}")
|
|
fi
|
|
while [[ ! -z $1 ]] && $(realpath $1) &> /dev/null; do
|
|
dbg "Directory: ${1}"
|
|
DIRS+=("$1"); shift
|
|
done
|
|
inotifywait -m -e "${FSW_EVENTS}" -r "${DIRS[@]}" 2>&1 \
|
|
| grep --line-buffered -v ' Beware: since -r was given, this may take a while!' \
|
|
| while read -r dir events filename; do
|
|
if [[ "$dir $events" = "Watches established." ]]; then
|
|
echo "Ready."
|
|
dbg "Directory: ${DIRS[@]}"
|
|
else
|
|
export FSW_FILENAME="$filename"
|
|
export FSW_DIR="$dir"
|
|
export FSW_PATH="$dir$filename"
|
|
export FSW_FILE_EVENTS="$events"
|
|
export FSW_EVENT="$events $dir$filename"
|
|
dbg "Event:\n $(date)\n $FSW_PATH\n $FILTER\n $FSW_EVENT\n $dir $events $filename\n ${SHELL_COMMAND}"
|
|
dbg "Filtered Event: $(<<< "$FSW_PATH" grep -P "$FILTER")"
|
|
<<< "$FSW_PATH" grep -P "$FILTER" > /dev/null 2>&1 && eval "${SHELL_COMMAND}" &> /dev/null
|
|
fi
|
|
done
|