#!/bin/bash

# args:  [-f <feature>] [-d <dependencies (outside SDK)>] [-a <additional build args>] [-j <JVM args>] [-v] [-D]

function usage {
cat << _EOF_
usage: $0 [<options>]

Use PDE Build to build Eclipse features

Optional arguments:
   -h      Show this help message
   -f      Feature ID to build
   -d      Plugin dependencies in addition to Eclipse SDK
           (space-separated, names on which to glob features and plugins)
   -a      Additional build arguments (ex. -DjavacSource=1.5)
   -j      VM arguments (ex. -DJ2SE-1.5=%{_jvmdir}/java/jre/lib/rt.jar)
   -v      Be verbose
   -D      Debug platform itself (passes -consolelog -debug to Eclipse)
_EOF_
}

function copyPlatform {
    # This seems silly but I was running into issues with empty strings
    # counting as arguments to copy-platform -- overholt, 2008-03
    if [ -z $dependencies ]; then
        if [ $verbose -eq 1 ]; then
            echo "/bin/sh -x $datadir/eclipse/buildscripts/copy-platform $SDK $datadir/eclipse"
            /bin/sh -x $datadir/eclipse/buildscripts/copy-platform $SDK $datadir/eclipse
        else
            echo "/bin/sh $datadir/eclipse/buildscripts/copy-platform $SDK $datadir/eclipse"
            /bin/sh $datadir/eclipse/buildscripts/copy-platform $SDK $datadir/eclipse
        fi
    else
        if [ $verbose -eq 1 ]; then
            echo "/bin/sh -x $datadir/eclipse/buildscripts/copy-platform $SDK $datadir/eclipse $dependencies"
            /bin/sh -x $datadir/eclipse/buildscripts/copy-platform $SDK $datadir/eclipse $dependencies
        else
            echo "/bin/sh $datadir/eclipse/buildscripts/copy-platform $SDK $datadir/eclipse $dependencies"
            /bin/sh $datadir/eclipse/buildscripts/copy-platform $SDK $datadir/eclipse $dependencies
        fi
    fi
}

function findFeatureId {
    # We can determine the feature ID if we have only one
    numFeatures=$(find $sourceDir -name feature.xml | wc -l)
    if [ $numFeatures -ne 1 ]; then
        #echo "# features found = $numFeatures"
        echo "Cannot determine feature ID.  Please specify with -f."
        usage
        exit 1
    fi
    
    featureXml=$(find $sourceDir -name feature.xml)
    
    # Taken from Ben Konrath's package-build
    # make an ant build files to extract the id from the feature.xml
    buildFile=$buildDir/findFeatureForRPM-tmp-build.xml
    
    echo "<project default=\"main\">
    	<target name=\"main\">
                   	<xmlproperty file=\"$featureXml\" collapseAttributes=\"true\"/>
    		<fail unless=\"feature.id\" message=\"feature.id not set\"/>
                   	<echo message=\"\${feature.id}\" />
            </target>
    </project>" > $buildFile
    
    featureId=$(ant -Dbasedir=$sourceDir -f $buildFile 2>&1 | grep echo | cut --delimiter=' ' -f 7)
    rm $buildFile
}

sourceDir=$PWD
buildDir=$PWD/build
SDK=$buildDir/SDK
homeDir=$buildDir/home
libdir=`rpm --eval "%{_libdir}"`
datadir=`rpm --eval "%{_datadir}"`
pdeBuildDir=$datadir/eclipse/plugins/org.eclipse.pde.build

featureId=
dependencies=
additionalArgs=
vmArgs=
verbose=0
dryRun=0
debugPlatform=0

# See above.  r = dry run (used for testing)
while getopts “hf:d:a:j:vrD” OPTION
do
     case $OPTION in
         h)
             usage
             exit
             ;;
         f)
             featureId=$OPTARG
             ;;
         d)
             dependencies=$OPTARG
             ;;
         a)
             additionalArgs=$OPTARG
             ;;
         j)
             vmArgs=$OPTARG
             ;;
         v)
             verbose=1
             ;;
         r)
             dryRun=1
             ;;
         D)
             debugPlatform=1
             ;;
         ?)
             usage
             exit
             ;;
     esac
done

echo "mkdir -p $buildDir"
if [ $dryRun -ne 1 ]; then
    mkdir -p $buildDir
fi

# Eclipse may try to write to the building user's home directory so we create a
# temporary one for use by the build.
echo "mkdir -p $homeDir"
if [ $dryRun -ne 1 ]; then
    mkdir -p $homeDir
fi

if [ -z $featureId ]; then
    findFeatureId
fi

if [ -z $featureId ]; then
    echo "Cannot determine feature ID.  Please specify with -f."
    usage
    exit 1
fi

echo "Building feature = $featureId."

if [ -z "$dependencies" ]; then
    if [ $verbose -eq 1 ]; then
        echo "Assuming no dependencies except Eclipse SDK."
    fi
fi

# Symlink the SDK and dependencies for build
if [ -z "$dependencies" ]; then
    echo "Symlinking SDK into $SDK directory."
else
    echo "Symlinking SDK and \"$dependencies\" into $SDK directory."
fi
if [ $dryRun -ne 1 ]; then
    copyPlatform
fi

if [ $debugPlatform -eq 1 ]; then
    debugPlatformArgs="-debug -consolelog"
fi

echo
echo "Starting build:"

echo "
java -cp $SDK/startup.jar \
-Dosgi.sharedConfiguration.area=$libdir/eclipse/configuration \
org.eclipse.core.launcher.Main \
-application org.eclipse.ant.core.antRunner \
$debugPlatformArgs \
-Dtype=feature \
-Did=$featureId \
-DbaseLocation=$SDK \
-DsourceDirectory=$sourceDir \
-DbuildDirectory=$buildDir \
-Dbuilder=$datadir/eclipse/plugins/org.eclipse.pde.build/templates/package-build \
$additionalArgs \
-f $pdeBuildDir/scripts/build.xml \
-vmargs \
-Duser.home=$homeDir \
$vmArgs
"

if [ $dryRun -ne 1 ]; then
    java -cp $SDK/startup.jar \
    -Dosgi.sharedConfiguration.area=$libdir/eclipse/configuration \
    org.eclipse.core.launcher.Main \
    -application org.eclipse.ant.core.antRunner \
    $debugPlatformArgs \
    -Dtype=feature \
    -Did=$featureId \
    -DbaseLocation=$SDK \
    -DsourceDirectory=$sourceDir \
    -DbuildDirectory=$buildDir \
    -Dbuilder=$datadir/eclipse/plugins/org.eclipse.pde.build/templates/package-build \
    $additionalArgs \
    -f $pdeBuildDir/scripts/build.xml \
    -vmargs \
    -Duser.home=$homeDir \
    $vmArgs
fi