initial commit of bin scripts into git

diff_dir

@@ -0,0 +1,50 @@
+#!/bin/bash
+# Compare two directories using rsync and print the differences
+# CAUTION: options MUST appear after the directories
+#
+# SYNTAX
+#---------
+# diff-dirs Left_Dir Right_Dir [options]
+#
+# EXAMPLE OF OUTPUT
+#------------------
+# L             file-only-in-Left-dir
+# R             file-only-in-right-dir
+# X >f.st...... file-with-dif-size-and-time
+# X .f...p..... file-with-dif-perms
+#
+# L / R mean that the file/dir appears only at the `L`eft or `R`ight dir. 
+#
+# X     means that a file appears on both sides but is not the same (in which
+#       case the next 11 characters give you more info. In most cases knowing
+#       that s,t,T and p depict differences in Size, Time and Permissions 
+#       is enough but `man rsync` has more info
+#       (look at the --itemize-changes option)
+#
+# OPTIONS
+#---------
+# All options are passed to rsync. Here are the most useful for the purpose
+# of directory comparisons:
+#
+# -c will force comparison of file contents (otherwise only
+#    time & size is compared which is much faster)
+#
+# -p/-o/-g will force comparison of permissions/owner/group
+
+if [[ -z $2 ]] ; then
+    echo "USAGE: $0 dir1 dir2 [optional rsync arguments]"
+    exit 1
+fi
+
+set -e
+
+LEFT_DIR=$1; shift
+RIGHT_DIR=$1; shift
+OPTIONS="$*"
+
+# Files that don't exist in Right_Dir
+rsync $OPTIONS -rin --ignore-existing "$LEFT_DIR"/ "$RIGHT_DIR"/|sed -e 's/^[^ ]* /L             /'
+# Files that don't exist in Left_Dir
+#rsync $OPTIONS -rin --ignore-existing "$RIGHT_DIR"/ "$LEFT_DIR"/|sed -e 's/^[^ ]* /R             /'
+# Files that exist in both dirs but have differences
+#rsync $OPTIONS -rin --existing "$LEFT_DIR"/ "$RIGHT_DIR"/|sed -e 's/^/X /'