Add a changelog generator script

Signed-off-by: ronaxdevil <pratabidya.007@gmail.com>

changelog.sh

@@ -0,0 +1,42 @@
+#!/bin/sh
+
+export Changelog=$PWD/Changelog.txt
+
+if [ -z $CHGLOGDUR ];
+then
+    CHGLOGDUR="10"
+fi
+
+if [ $CHGLOGDUR -gt 30 ];
+then
+    echo "Duration greater than 30 is not allowed, resetting to 10"
+    CHGLOGDUR="10"
+fi
+
+if [ -f $Changelog ]; 
+then
+	rm -f $Changelog
+fi
+
+touch $Changelog
+
+echo "Generating changelog..."
+
+for i in $(seq $CHGLOGDUR);
+do
+export After_Date=`date --date="$i days ago" +%m-%d-%Y`
+k=$(expr $i - 1)
+	export Until_Date=`date --date="$k days ago" +%m-%d-%Y`
+
+	# Line with after --- until was too long for a small ListView
+	echo '=======================' >> $Changelog;
+	echo  "     "$Until_Date       >> $Changelog;
+	echo '=======================' >> $Changelog;
+	echo >> $Changelog;
+
+	# Cycle through every repo to find commits between 2 dates
+	repo forall -pc 'git log --oneline --after=$After_Date --until=$Until_Date' >> $Changelog
+	echo >> $Changelog;
+done
+
+sed -i 's/project/   */g' $Changelog