Fix date handling in git log script: use today's date if no argument is provided

Author: mbridak

parse_gitlog.sh

@@ -1,4 +1,14 @@
+#!/bin/bash
+
 # call git log, requesting just the commit date and commit message and direct the output to a temporary file.
 
-git log --since=$1 --pretty=format:"%ad %s" --date=short > scratch.txt
+#If no date passed in, use today.
+thevar=""
+if [$1 -eq ""]; then
+    thevar=`date +"%F"`
+else
+    thevar=$1
+fi
+
+git log --since=$thevar --pretty=format:"%ad %s" --date=short > scratch.txt
 python process-scratch.py