Add utils

[max/saltfiles.git] / states / utils / files / onchanges.bash

diff --git a/states/utils/files/onchanges.bash b/states/utils/files/onchanges.bash
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+#!/bin/bash
+#
+# Watch current directory (recursively) for file changes, and execute
+# a command when a file or directory is created, modified or deleted.
+#
+# Written by: Senko Rasic <senko.rasic@dobarkod.hr>
+#
+# Requires Linux, bash and inotifywait (from inotify-tools package).
+#
+# To avoid executing the command multiple times when a sequence of
+# events happen, the script waits one second after the change - if
+# more changes happen, the timeout is extended by a second again.
+#
+# Installation:
+#     chmod a+rx onchange.sh
+#     sudo cp onchange.sh /usr/local/bin
+#
+# Example use - rsync local changes to the remote server:
+#    
+#    onchange.sh rsync -avt . host:/remote/dir
+#
+# Released to Public Domain. Use it as you like.
+#
+
+EVENTS="CREATE,CLOSE_WRITE,DELETE,MODIFY,MOVED_FROM,MOVED_TO"
+
+if [ -z "$1" ]; then
+    echo "Usage: $0 cmd ..."
+    exit -1;
+fi
+
+inotifywait -e "$EVENTS" -m -r --format '%:e %f' . | (
+    WAITING="";
+    while true; do
+        LINE="";
+        read -t 1 LINE;
+        if test -z "$LINE"; then
+            if test ! -z "$WAITING"; then
+                    echo "CHANGE";
+                    WAITING="";
+            fi;
+        else
+            WAITING=1;
+        fi;
+    done) | (
+    while true; do
+        read TMP;
+        echo $@
+        eval $@
+    done
+)