setup

#!/usr/bin/env python

'''
/*
 * The Shadow Simulator
 * Copyright (c) 2010-2011, Rob Jansen
 * See LICENSE for licensing information
 */
'''

import sys, os, argparse, subprocess, multiprocessing, shlex, shutil, urllib2, tarfile, gzip, stat, time
from datetime import datetime

import logging
logging.basicConfig(format='%(asctime)s %(levelname)s %(message)s', level=logging.DEBUG)

BUILD_PREFIX="./build"
INSTALL_PREFIX=os.path.expanduser("~/.shadow")

def main():
    parser_main = argparse.ArgumentParser(
        description='Utility to help setup the Shadow simulator', 
        formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    
    # setup our commands
    subparsers_main = parser_main.add_subparsers(
        help='run a subcommand (for help use <subcommand> --help)')
        
    # configure build subcommand
    parser_build = subparsers_main.add_parser('build',
        help='configure and build Shadow', 
        formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    parser_build.set_defaults(func=build, 
        formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    
    # add building options
    parser_build.add_argument('-p', '--prefix', 
        help="configure PATH as Shadow root installation directory", 
        metavar="PATH",
        action="store", dest="prefix",
        default=INSTALL_PREFIX)
    
    parser_build.add_argument('-i', '--include', 
        help="append PATH to the list of paths searched for headers. useful if dependencies are installed to non-standard locations, or when compiling custom libraries.",
        metavar="PATH",
        action="append", dest="extra_includes",
        default=[INSTALL_PREFIX+ "/include"])
    
    parser_build.add_argument('-l', '--library', 
        help="append PATH to the list of paths searched for libraries. useful if dependencies are installed to non-standard locations, or when compiling custom libraries.",
        metavar="PATH",
        action="append", dest="extra_libraries",
        default=[INSTALL_PREFIX+ "/lib"])

    parser_build.add_argument('-c', '--clean',
        help="force a full rebuild of Shadow by removing build cache",
        action="store_true", dest="do_force_rebuild",
        default=False)
    
    parser_build.add_argument('-g', '--debug',
        help="build in extra memory checks and debugging symbols when running Shadow",
        action="store_true", dest="do_debug",
        default=False)

    parser_build.add_argument('-v', '--verbose',
        help="print verbose output from the compiler",
        action="store_true", dest="do_verbose",
        default=False)
        
    parser_build.add_argument('-j', '--jobs',
        help="number of jobs to run simultaneously during the build",
        metavar="N", type=int,
        action="store", dest="njobs",
        default=multiprocessing.cpu_count())
        
    parser_build.add_argument('-o', '--profile',
        help="build in gprof profiling information when running Shadow",
        action="store_true", dest="do_profile",
        default=False)
    
    parser_build.add_argument('-t', '--test',
        help="build tests", 
        action="store_true", dest="do_test",
        default=False)
    
    parser_build.add_argument('--export-libraries', 
        help="export Shadow's plug-in service libraries and headers", 
        action="store_true", dest="export_libraries",
        default=False)
        
    parser_build.add_argument('--disable-plugin-tgen',
        help="do not build the built-in traffic generator plug-in (tgen)", 
        action="store_true", dest="disable_tgen",
        default=False)
    
    # configure install subcommand
    parser_install = subparsers_main.add_parser('install', help='install Shadow', 
        formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    parser_install.set_defaults(func=install, 
        formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    
    # get arguments, accessible with args.value
    args = parser_main.parse_args()
    # run chosen command
    r = args.func(args)
    
    logging.info("returning code '{0}'".format(r))

def build(args):
    # get absolute paths
    if args.prefix is not None: args.prefix = getfullpath(args.prefix)
    
    filepath=getfullpath(__file__)
    rootdir=filepath[:filepath.rfind("/")]
    builddir=getfullpath(BUILD_PREFIX)
    shadowdir=builddir+"/shadow"
    installdir=getfullpath(args.prefix)
    
    # clear cmake cache
    if args.do_force_rebuild and os.path.exists(shadowdir): shutil.rmtree(shadowdir)
    
    # create directories
    if not os.path.exists(shadowdir): os.makedirs(shadowdir)
    if not os.path.exists(installdir): os.makedirs(installdir)
        
    # build up args string for the cmake command
    cmake_cmd = "cmake " + rootdir + " -DCMAKE_INSTALL_PREFIX=" + installdir

    # other cmake options
    if args.do_debug: cmake_cmd += " -DSHADOW_DEBUG=ON"
    if args.do_verbose: os.putenv("VERBOSE", "1")
    if args.do_test: cmake_cmd += " -DSHADOW_TEST=ON"
    if args.do_profile: cmake_cmd += " -DSHADOW_PROFILE=ON"
    if args.export_libraries: cmake_cmd += " -DSHADOW_EXPORT=ON"
    if args.disable_tgen: cmake_cmd += " -DBUILD_TGEN=OFF"

    # we will run from build directory
    calledDirectory = os.getcwd()
    
    # run build tasks
    os.chdir(shadowdir)
    
    # hack to make passing args to CMAKE work... doesnt seem to like the first arg
    args.extra_includes.insert(0, "./")
    args.extra_libraries.insert(0, "./")
    
    # add extra library and include directories as absolution paths
    make_paths_absolute(args.extra_includes)
    make_paths_absolute(args.extra_libraries)

    # make sure we can access them from cmake
    cmake_cmd += " -DCMAKE_EXTRA_INCLUDES=" + ';'.join(args.extra_includes)
    cmake_cmd += " -DCMAKE_EXTRA_LIBRARIES=" + ';'.join(args.extra_libraries)

    # look for the clang/clang++ compilers
    clangccpath = which("clang")
    if clangccpath is None: 
        logging.error("can't find 'clang' compiler in your PATH! Is it installed?")
    clangcxxpath = which("clang++")
    if clangcxxpath is None: 
        logging.error("can't find 'clang++' compiler in your PATH! Is it installed?")
    if clangccpath is None or clangcxxpath is None: return -1
    
    # set clang/llvm as compiler
    os.putenv("CC", clangccpath)
    os.putenv("CXX", clangcxxpath)
    #cmake_cmd += " -D_CMAKE_TOOLCHAIN_PREFIX=llvm-"
    
    # call cmake to configure the make process, wait for completion
    logging.info("running \'{0}\' from \'{1}\'".format(cmake_cmd, os.getcwd()))
    retcode = subprocess.call(cmake_cmd.strip().split())
    logging.info("cmake returned " + str(retcode))
    
    if retcode == 0:
        # call make, wait for it to finish
        make = "make -j{0}".format(args.njobs)
        logging.info("calling " + make)
        retcode = subprocess.call(shlex.split(make))
        logging.info("make returned " + str(retcode))
        if retcode == 0: logging.info("now run \'./setup install\'")
        else: logging.error("Non-zero return code from make.")
    else: logging.error(" Non-zero return code from cmake.")

    # go back to where we came from
    os.chdir(calledDirectory)
    return retcode

def install(args):
    builddir=getfullpath(BUILD_PREFIX)
    shadowdir=builddir+"/shadow"
    if not os.path.exists(shadowdir): 
        logging.error("please build before installing!")
        return

    # go to build dir and install from makefile
    calledDirectory = os.getcwd()
    os.chdir(shadowdir)
    
    # call make install, wait for it to finish
    makeCommand = "make install"
    
    logging.info("calling \'"+makeCommand+"\'")
    retcode = subprocess.call(makeCommand.strip().split())
    logging.info("make install returned " + str(retcode))
    if retcode == 0: logging.info("now run \'shadow\' from \'PREFIX/bin\' (check your PATH)")
    
    # go back to where we came from
    os.chdir(calledDirectory)
    return retcode

def getfullpath(path):
    return os.path.abspath(os.path.expanduser(path))

def make_paths_absolute(list):
    for i in xrange(len(list)): list[i] = getfullpath(list[i])

## helper - test if program is in path
def which(program):
    def is_exe(fpath):
        return os.path.isfile(fpath) and os.access(fpath, os.X_OK)
    fpath, fname = os.path.split(program)
    if fpath:
        if is_exe(program):
            return program
    else:
        for path in os.environ["PATH"].split(os.pathsep):
            exe_file = os.path.join(path, program)
            if is_exe(exe_file):
                return exe_file
    return None
    
if __name__ == '__main__':
    main()