Ant example source code file (runant.py)

This example Ant source code file (runant.py) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Ant tags/keywords

ant_args, ant_home, ant_home, ant_lib, ant_opts, classpath, java_home, javacmd, javacmd, license, license, localclasspath, localclasspath, opts

The runant.py source code

#!/usr/bin/python
# Licensed to the Apache Software Foundation (ASF) under one or more
#  contributor license agreements.  See the NOTICE file distributed with
#  this work for additional information regarding copyright ownership.
#  The ASF licenses this file to You under the Apache License, Version 2.0
#  (the "License"); you may not use this file except in compliance with
#  the License.  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.
#

"""

 runant.py

    This script is a translation of the runant.pl written by Steve Loughran.
    It runs ant with/out arguments, it should be quite portable (thanks to
    the python os library)
    This script has been tested with Python2.0/Win2K

 created:         2001-04-11
 author:          Pierre Dittgen pierre.dittgen@criltelecom.com

 Assumptions:

 - the "java" executable/script is on the command path
"""
import os, os.path, string, sys

# Change it to 1 to get extra debug information
debug = 0

#######################################################################

# If ANT_HOME is not set default to script's parent directory
if os.environ.has_key('ANT_HOME'):
    ANT_HOME = os.environ['ANT_HOME']
else:
    ANT_HOME = os.path.dirname(os.path.dirname(os.path.abspath(sys.argv[0])))

# set ANT_LIB location
ANT_LIB = os.path.join(ANT_HOME, 'lib')

# set JAVACMD (check variables JAVACMD and JAVA_HOME)
JAVACMD = None
if not os.environ.has_key('JAVACMD'):
    if os.environ.has_key('JAVA_HOME'):
        if not os.path.exists(os.environ['JAVA_HOME']):
            print "Warning: JAVA_HOME is not defined correctly."
        else:
            JAVACMD = os.path.join(os.environ['JAVA_HOME'], 'bin', 'java')
    else:
        print "Warning: JAVA_HOME not set."
else:
    JAVACMD = os.environ['JAVACMD']
if not JAVACMD:
    JAVACMD = 'java'

launcher_jar = os.path.join(ANT_LIB, 'ant-launcher.jar')
if not os.path.exists(launcher_jar):
    print 'Unable to locate ant-launcher.jar. Expected to find it in %s' % \
        ANT_LIB

# Build up standard classpath (LOCALCLASSPATH)
LOCALCLASSPATH = launcher_jar
if os.environ.has_key('LOCALCLASSPATH'):
    LOCALCLASSPATH += os.pathsep + os.environ['LOCALCLASSPATH']

ANT_OPTS = ""
if os.environ.has_key('ANT_OPTS'):
    ANT_OPTS = os.environ['ANT_OPTS']

OPTS = ""
if os.environ.has_key('JIKESPATH'):
    OPTS = '-Djikes.class.path=\"%s\"' % os.environ['JIKESPATH']

ANT_ARGS = ""
if os.environ.has_key('ANT_ARGS'):
    ANT_ARGS = os.environ['ANT_ARGS']

CLASSPATH = ""
if os.environ.has_key('CLASSPATH'):
    CLASSPATH = os.environ['CLASSPATH']

# Builds the commandline
cmdline = ('%s %s -classpath %s -Dant.home=%s %s ' + \
    'org.apache.tools.ant.launch.Launcher %s -lib %s %s') \
     % (JAVACMD, ANT_OPTS, LOCALCLASSPATH, ANT_HOME, OPTS, ANT_ARGS, \
        CLASSPATH, string.join(sys.argv[1:], ' '))

if debug:
    print '\n%s\n\n' % (cmdline)
sys.stdout.flush()

# Run the biniou!
os.system(cmdline)