57 lines
1.4 KiB
Bash
57 lines
1.4 KiB
Bash
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#!/bin/sh
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# name: diff_notify.sh
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# desc: monitor a file for changes; then notify the user when it changes
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# by default it makes your PC beep a couple times
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# lisc: cc0
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# FILEPATH -> SHA256_HASH
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# get a file's hash, using the proper program
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function file_hash {
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local file="$1"
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local hash="$(sha256sum "$file" 2>/dev/null | awk '{print $1}' 2>/dev/null)"
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if test -z "$hash"; then
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hash="$(sha256 -q "$file" 2>/dev/null)"
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fi
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echo "$hash"
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}
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# NIL -> NIL
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# beeps even on systems without the beep command
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function true_beep {
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if beep 2>/dev/null; then printf '\007\n'; fi
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}
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# FILEPATH -> NIL
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# monitor a file for changes 'till death, notify the user when it changes
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function monitor_file {
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local file="$1"
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local old_hash="$(file_hash "$file")"
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local new_hash="$old_hash"
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echo "monitoring $file"
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while test 1 -eq 1; do
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old_hash="$new_hash"
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new_hash="$(file_hash "$file")"
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if test "$old_hash" != "$new_hash"; then
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notify "$file" "$(tail -1 "$file")"
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fi
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sleep 5
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done
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}
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# HEADER MESSAGE -> ??
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# notify the user *somehow*-- depending on what's uncommented
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function notify {
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local header="$1"
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local message="$2"
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## As you can tell, there are a bunch of ways to be notified. =w=
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# notify-send "$header" "$message"
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# zenity --notification --text="$header"
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# mpv ~/.notification.ogg
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true_beep; true_beep
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}
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# INVOCATION
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# ==================
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FILE="$1"
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monitor_file "$FILE"
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