Script to automatically set the build number to the date

xcode-build-number-generator.sh

#!/bin/sh
# xcode-build-number-generator.sh
# @desc Automaticvally create build number every time using curent day, month and year
# @usage
# 1. Select: your Target in Xcode
# 2. Select: Build Phases Tab
# 3. Select: Add Build Phase -> Add Run Script
# 4. Paste code below in to new "Run Script" section
# 5. Drag the "Run Script" below "Link Binaries With Libraries"


#Credits
# sekati@github for intial direction about automatic versioning
# http://www.codinghorror.com/blog/2007/02/whats-in-a-version-number-anyway.html (For unferstanding the Software Versoining)
#Feel free to leave comment or report issues


MONTH=`date | awk '{print $3}'`

case "$MONTH" in
    'Jan' | [Jj][Aa][Na] )
        MONTHNUMBER=01
   ;;
  'Feb' |[Ff][Ee][Bb])
        MONTHNUMBER=02
  ;;
  'Mar' |[Mm][Aa][Rr])
        MONTHNUMBER=03
  echo "Month is $MONTHNUMBER"
  ;;
  'Apr' |[Aa][Pp][Rr])
        MONTHNUMBER=04
  ;;
  'May' |[Mm][Aa][Yy])
        MONTHNUMBER=05
        ;;
  'Jun' |[Jj][Uu][Nn])
        MONTHNUMBER=06
        ;;
  'Jul' |[Jj][Uu][Ll])
        MONTHNUMBER=07
        ;;
  'Aug' |[Aa][Uu][Gg])
        MONTHNUMBER=08
        ;;
  'Sep' |[Ss][Ee][Pp])
        MONTHNUMBER=09
        ;;
  'Oct' |[Oo][Cc][Tt])
        MONTHNUMBER=10
        ;;
  'Nov' |[Nn][Oo][Vv])
        MONTHNUMBER=11
        ;;
  'Dec' |[Dd][Ee][Cc])
        MONTHNUMBER=12
        ;;
esac

DATE=`date | awk '{print $2}'`
echo "Day = $DATE"
YEAR=`date | awk '{print $4}'`
echo "Year = $YEAR"

### only uxncomment section below if testing the format in terminal
# echo "BuildNumber1 = $MONTH$DATE$YEAR"
# echo "or BUILD NUMBER = $DATE$MONTH$YEAR"
# echo "or BUILD NUMBER = $MONTHNUMBER$DATE$YEAR Format is |Month Number Date Year|"
# echo "or BUILD NUMBER = $DATE$MONTHNUMBER$YEAR format is |Date MonthNumber Year|"
############################

#### Uncomment only one one style or last one will be in effect
#buildNumber=$MONTH$DATE$YEAR
#buildNumber=$DATE$MONTH$YEAR
#buildNumber=$MONTHNUMBER$DATE$YEAR
#buildNumber=$DATE$MONTHNUMBER$YEAR
buildNumber=$YEAR$MONTHNUMBER$DATE


echo "Final Build number is $buildNumber"
## Below command write buildNumber in the property list
/usr/libexec/PlistBuddy -c "Set :CFBundleVersion $buildNumber" "${PROJECT_DIR}/${INFOPLIST_FILE}"

You could skip most of the above code (parsing the date output) and just set buildNumber directly:

# line 77:
buildNumber=$(date +%Y%m%d)