Salesforce package.xml builder from GIT repository

sf_pkg_builder_from_git.sh

#/usr/bin/env bash
# -bname build name
# -wspace build workspace dir
# -lcommit builds last commit

#read command line args
while getopts b:w:l: option
do
        case "${option}"
        in
                b) BNAME=${OPTARG};;
                w) WSPACE=${OPTARG};;
                l) LCOMMIT=${OPTARG};;
        esac
done

echo Build Name: $BNAME
echo Workspace: $WSPACE

if [ -z "$LCOMMIT" ]
then
    LCOMMIT=`git rev-parse HEAD`
fi
echo Last Commit: $LCOMMIT

# check for the existence of an existing commit file for this
# project
SCRIPTFILE='/var/lib/jenkins/workspace/lastcommit/'$BNAME'.txt'
echo Searching for script file $SCRIPTFILE...
if [ -e $SCRIPTFILE ]
then
        PREVRSA=$(<$SCRIPTFILE) &&
        echo Found previous SHA $PREVRSA
fi

if [ -z "$PREVRSA" ]
then
    PREVRSA=`git rev-list --max-parents=0 HEAD`
    echo `git rev-list --max-parents=0 HEAD`
fi
echo PREVRSA: $PREVRSA

#change working directory to the dir for this build
echo Changing working directory to /var/lib/jenkins/workspace
cd /var/lib/jenkins/workspace

# Backup existing Package.xml
cd $WSPACE/src
echo changing directory to $WSPACE
cp package.xml{,.bak} &&
    echo Backing up package.xml to package.xml.bak &&
    read -d '' NEWPKGXML <<EOF
<?xml version="1.0" encoding="UTF-8"?>
<Package>
</Package>
EOF
echo ===PKGXML===
echo $NEWPKGXML
echo Creating new package.xml
echo $NEWPKGXML > $WSPACE/src/package.xml

echo "git diff-tree --no-commit-id --name-only -r $LCOMMIT $PREVRSA"
for CFILE in `git diff-tree --no-commit-id --name-only -r $LCOMMIT $PREVRSA`
do
    echo Analyzing file `basename $CFILE`

    case "$CFILE"
        in
        *.cls*) TYPENAME="ApexClass";;
        *.page*) TYPENAME="ApexPage";;
        *.component*) TYPENAME="ApexComponent";;
        *.trigger*) TYPENAME="ApexTrigger";;
        *.app*) TYPENAME="CustomApplication";;
        *.labels*) TYPENAME="CustomLabels";;
        *.object*) TYPENAME="CustomObject";;
        *.tab*) TYPENAME="CustomTab";;
        *.resource*) TYPENAME="StaticResource";;
        *.workflow*) TYPENAME="Workflow";;
        *.remoteSite*) TYPENAME="RemoteSiteSettings";;
        *.pagelayout*) TYPENAME="Layout";;
        *) TYPENAME="UNKNOWN TYPE";;
    esac

    if [[ "$TYPENAME" != "UNKNOWN TYPE" ]]
    then
        ENTITY=$(basename "$CFILE")
        ENTITY="${ENTITY%.*}"
        echo ENTITY NAME: $ENTITY

        if grep -Fq "$TYPENAME" $WSPACE/src/package.xml
        then
            echo Generating new member for $ENTITY
            xmlstarlet ed -L -s "/Package/types[name='$TYPENAME']" -t elem -n members -v "$ENTITY" $WSPACE/src/package.xml
        else
            echo Generating new $TYPENAME type
            xmlstarlet ed -L -s /Package -t elem -n types -v "" $WSPACE/src/package.xml
            xmlstarlet ed -L -s '/Package/types[not(*)]' -t elem -n name -v "$TYPENAME" $WSPACE/src/package.xml
            echo Generating new member for $ENTITY
            xmlstarlet ed -L -s "/Package/types[name='$TYPENAME']" -t elem -n members -v "$ENTITY" $WSPACE/src/package.xml
        fi
    else
        echo ERROR: UNKNOWN FILE TYPE $CFILE
    fi
    echo ====UPDATED PACKAGE.XML====
    cat $WSPACE/src/package.xml
done
echo Saving last RSA Commit
echo $LCOMMIT > /var/lib/jenkins/workspace/lastcommit/$BNAME.txt
echo Cleaning up Package.xml
xmlstarlet ed -L -s /Package -t elem -n version -v "27.0" $WSPACE/src/package.xml
xmlstarlet ed -L -i /Package -t attr -n xmlns -v "http://soap.sforce.com/2006/04/metadata" $WSPACE/src/package.xml

echo ====FINAL PACKAGE.XML=====
cat $WSPACE/src/package.xml