# HG changeset patch
# User Jeff Hammel <jhammel@mozilla.com>
# Date 1370705197 25200
# Node ID c64406cdcee101f3621263aaf2b963b43e290102
# Parent  5a0009051b1316a6a306f5453ca08ebec339e674
nearly works

diff -r 5a0009051b13 -r c64406cdcee1 bin/example/self-writing.sh
--- a/bin/example/self-writing.sh	Sat Jun 08 07:33:06 2013 -0700
+++ b/bin/example/self-writing.sh	Sat Jun 08 08:26:37 2013 -0700
@@ -1,6 +1,15 @@
 #!/bin/bash
 
 # illustrate self-writing script (example)
+# This one does something hard and replaces dynamic data with sed.
+# Other solutions (magic markers, etc) are possible
 
-path=`readlink $0`
-tmp=`tempfile`
\ No newline at end of file
+path=`readlink -f $0`
+tmp=`tempfile`
+datestamp=`date`
+nonce="This script regenerated at "
+
+# avoiding -i for safety
+sed 's/\(echo \"'"${nonce}"'\).*\"/\1'"${datestamp}"'\"/' ${path} > ${tmp}
+
+echo "This script regenerated at "
\ No newline at end of file