with changeDir(runDir):
        print "mvn clean"
        subprocess.call(["mvn clean"], shell=True)
    with changeDir(runDir):
        print "mvn compile"
        subprocess.call(["mvn compile"], shell=True)
    print "compile time",datetime.now() - startTime
    startTime = datetime.now()
    with changeDir(runDir):
        print "mvn package"
        subprocess.call(["mvn package -DskipTests=true"], shell=True)
    with changeDir(runDir):
        subprocess.call(["export MAVEN_OPTS="-Xmx10g -Xms10g -XX:MaxPermSize=10g -XX:+UseConcMarkSweepGC -XX:-UseGCOverheadLimit""], shell=True)
        print "mvn exec"
        subprocess.call(["mvn exec:java -Dexec.mainClass=examples.Example -Dexec.args="pathToFile"+fname+"""], shell=True)

[INFO] Scanning for projects...
[INFO] Inspecting build with total of 1 modules...
[INFO] Installing Nexus Staging features:
....
..

mvn clean
mvn compile
compile time 0:00:08.027680
mvn package
mvn exec

mvn clean
    [INFO] Scanning for projects...
    [INFO] Inspecting build with total of 1 modules...
    [INFO] Installing Nexus Staging features:
....
..
mvn compile
    [INFO] Scanning for projects...
    [INFO] Inspecting build with total of 1 modules...
    [INFO] Installing Nexus Staging features: