herwig-bootstrap
sidsule (Siddharth Sule)
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	sidsule
	Aug 9 2023, 2:57 PM

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herwig-bootstrap
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	#!/usr/bin/env python
	import subprocess,glob
	import sys, os, errno, platform, shutil, ssl

	try:
	from urllib.request import Request as Request
	from urllib.request import urlopen as urlopen
	from urllib.error import URLError as URLError
	from urllib.error import HTTPError as HTTPError
	except ImportError:
	from urllib2 import Request as Request
	from urllib2 import urlopen as urlopen
	from urllib2 import URLError as URLError
	from urllib2 import HTTPError as HTTPError

	import tarfile
	from optparse import OptionParser, OptionGroup
	from optparse import SUPPRESS_HELP as NOHELP
	from time import sleep

	if platform.system() == 'Darwin':
	default_cc = os.getenv('CC', '/usr/bin/clang')
	default_cxx = os.getenv('CXX', '/usr/bin/clang++')
	default_fc = os.getenv('FC', '/opt/homebrew/bin/gfortran')
	else:
	default_cc = os.getenv('CC', 'gcc')
	default_cxx = os.getenv('CXX', 'g++')
	default_fc = os.getenv('FC', 'gfortran')

	# from http://stackoverflow.com/a/377028
	def which(program):
	import os
	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):
	path = path.strip('"')
	exe_file = os.path.join(path, program)
	if is_exe(exe_file):
	return exe_file

	return None

	parser = OptionParser(usage='Usage: %prog [options] DEST_DIR\n'
	' %prog --help')

	without_helptext = """
	can optionally be satisfied with pre-existing installations. Specifying the PATH to an
	existing installation will prevent a local build.
	Each --with-FOO option has a corresponding --without-FOO,
	to disable that package completely.
	We can't help with build errors arising from use of --with and --without!
	"""

	parser_core = OptionGroup(parser,"Override main dependencies",
	"The main dependencies for Herwig"+without_helptext)

	parser_nlo = OptionGroup(parser,"Override NLO dependencies",
	"The dependencies on NLO providers"+without_helptext)

	parser_scm = OptionGroup(parser,"Source code repositories (for developers)",
	"Some dependencies are also available as "
	"direct source code checkouts. "
	"Default repo URLs are already provided, you only "
	"need to use the --foo-repo= options to change the defaults.")

	parser_versions = OptionGroup(parser, "Code versions",
	"Change the default version of the installation.")

	parser_misc = OptionGroup(parser,"Miscellaneous options",
	"Options for special use cases, not required for a regular build.")

	parser.add_option_group(parser_core)
	parser.add_option_group(parser_nlo)
	parser.add_option_group(parser_versions)
	parser.add_option_group(parser_scm)
	parser.add_option_group(parser_misc)

	# src directory
	parser_misc.add_option("--src-dir",
	metavar='PATH',
	type='string',
	default="",
	dest='src_dir',
	help='Separate the source/build directory. [DEST_DIR/src]')

	# lite optin (build a minimal set of packages)
	def lite(option, opt, value, parser):
	non_lite_components = ['vbfnlo', 'madgraph', 'evtgen', 'yoda', 'njet', 'gosam', 'openloops', 'hjets', 'rivet', 'fastjet_contrib', 'pythia']
	for program in non_lite_components:
	setattr(parser.values, program, False)
	pass

	parser_misc.add_option("--lite",action="callback", callback=lite,help='Build the minimal set of packages to run Herwig')

	# function to set up the standard flags for a program
	def setUpFlags(parser,program,version) :
	parser.add_option("--with-"+program ,
	dest=program+'_loc',
	metavar='PATH',
	default=None,
	help="")
	parser.add_option("--without-"+program,
	action='store_false',
	dest=program,
	default=True,
	help=NOHELP)
	if version:
	parser_versions.add_option("--"+program+"-version",
	metavar='VER',
	type='string',
	default=version,
	dest=program+"_ver",
	help="[%default]")
	# compiler building
	parser.add_option("--build-gcc",
	action='store_true' ,
	dest="gcc",
	default=False,
	help="Build a local copy of the gcc compilers to use for the rest of bootstrap.")

	parser_versions.add_option("--gcc-version",
	metavar='VER',
	type='string',
	default='12.2.0',
	dest="gcc_ver",
	help="[%default]")

	# C++ 14
	parser.add_option("--c++14-flag",
	metavar="'...'",
	type='string',
	dest="cxx14",
	default='-std=c++14',
	help="Compiler flag which enables C++14 compatibility. ['%default']")

	# gengetopt
	parser_misc.add_option("--build-gengetopt",
	action='store_true' ,
	dest='gengetopt',
	default=False,
	help="Always build a local version of gengetopt instead of automatic detection.")

	# flags for boost
	setUpFlags(parser_core,"boost","1.80.0")
	parser_misc.add_option("--boost-all",
	action='store_false',
	dest="boost_minimal",
	default=True,
	help='Install all the boost libaries, including those not required by Herwig.')
	# flags for gsl
	setUpFlags(parser_core,"gsl","2.7")
	# flags for fastjet
	setUpFlags(parser_core,"fastjet","3.4.0")
	# flags for fastjet
	setUpFlags(parser_core,"fastjet_contrib","1.050")
	# flags for hepmc
	setUpFlags(parser_core,"hepmc","3.2.5")
	# flags for lhapdf
	setUpFlags(parser_core,"lhapdf","6.5.3")
	parser_misc.add_option("--add-pdf",
	metavar='PDF',
	action='append',
	dest="pdfs",
	default=["MMHT2014lo68cl","MMHT2014nlo68cl","CT14lo","CT14nlo"],
	help='Add a PDF to the defaults %default')
	# flags for yoda
	setUpFlags(parser_core,"yoda","1.9.8")
	parser_scm.add_option("--yoda-git",
	action='store_true',
	dest="yoda_git",
	default=False,
	help='')
	parser_scm.add_option("--yoda-repo",
	metavar='URL',
	type='string',
	default="https://gitlab.com/hepcedar/yoda.git",
	dest='yoda_repo',
	help='[%default]')
	parser_misc.add_option("--yoda-disable-root",
	action='store_false',
	dest='yoda_root',
	default=True,
	help='Configure YODA with the --disable-root option.')
	# flags for rivet
	setUpFlags(parser_core,"rivet","3.1.8")
	parser_scm.add_option("--rivet-git",
	action='store_true',
	dest="rivet_git",
	default=False,
	help='')
	parser_scm.add_option("--rivet-repo",
	metavar='URL',
	type='string',
	default="https://gitlab.com/hepcedar/rivet.git",
	dest='rivet_repo',
	help='[%default]')
	# flags for thepeg
	setUpFlags(parser_core,"thepeg","2.3.0")
	parser_scm.add_option("--thepeg-hg",
	action='store_true',
	dest="thepeg_hg",
	default=False,
	help='')
	parser_scm.add_option("--thepeg-repo",
	metavar='URL',
	type='string',
	default="https://phab.hepforge.org/source/thepeghg/",
	dest='thepeg_repo',
	help='[%default]')

	# flags for herwig
	setUpFlags(parser_core,"herwig","7.3.0")
	parser_scm.add_option("--herwig-hg",
	action='store_true',
	dest="herwig_hg",
	default=False,
	help='')
	parser_scm.add_option("--herwig-repo",
	metavar='URL',
	type='string',
	default="https://phab.hepforge.org/source/herwighg/",
	dest='herwig_repo',
	help=' [%default]')
	# madgraph
	setUpFlags(parser_nlo,"madgraph","3.5.1")
	parser_scm.add_option("--madgraph-bzr",
	action='store_true',
	dest="madgraph_bzr",
	default=False,
	help='')
	parser_scm.add_option("--madgraph-repo",
	metavar='URL',
	type='string',
	default="lp:~matchboxteam/mg5amcnlo/matchbox_output",
	dest='madgraph_repo',
	help='[%default]')
	# flags for njet
	setUpFlags(parser_nlo,"njet","2.1.1")
	# flags for vbfnlo
	setUpFlags(parser_nlo,"vbfnlo","3.0.0beta5")
	parser_misc.add_option("--vbfnlo-processes",
	metavar='PROCS',
	type='string',
	default="vbf,hjjj",
	dest='vbfnlo_processes',
	help='The processes for VBFNLO [%default]')
	parser_scm.add_option("--vbfnlo-git",
	action='store_true',
	dest="vbfnlo_git",
	default=False,
	help='')
	parser_scm.add_option("--vbfnlo-repo",
	metavar='URL',
	type='string',
	default="https://github.com/vbfnlo/vbfnlo.git",
	dest='vbfnlo_repo',
	help='[%default]')
	# flags for GoSam
	setUpFlags(parser_nlo,"gosam","")
	# flags for OpenLoops
	setUpFlags(parser_nlo,"openloops","2.1.2")
	parser_scm.add_option("--openloops-svn",
	action='store_true',
	dest="openloops_svn",
	default=False,
	help='')
	parser_scm.add_option("--openloops-repo",
	metavar='URL',
	type='string',
	default="svn+ssh://phab.hepforge.org/source/openloopssvn/OpenLoops/",
	dest='openloops_repo',
	help='[%default]')
	parser_misc.add_option("--openloops-processes",
	metavar='PROCS',
	type='string',
	default="ppll",
	dest='openloops_processes',
	help='The processes for OpenLoops [%default]')
	# flags for hjets
	setUpFlags(parser_nlo,"hjets","1.3")
	parser_scm.add_option("--hjets-hg",
	action='store_true',
	dest="hjets_hg",
	default=False,
	help='')
	parser_scm.add_option("--hjets-repo",
	metavar='URL',
	type='string',
	default="https://hjets.hepforge.org/hg/hjets",
	dest='hjets_repo',
	help='[%default]')

	## Dependencies for EvtGen
	# pythia
	setUpFlags(parser_core,"pythia",None)
	# version needs to be held fixed at R01-07-00
	setUpFlags(parser_core,"evtgen",None)

	# no of cores
	try:
	from multiprocessing import cpu_count
	ncore = max(cpu_count()-1, 1)
	del cpu_count
	except:
	ncore = 1

	parser.add_option("-j",
	type='int',
	metavar='N',
	default=ncore,
	dest="ncore",
	help="Use N cores in make -j to speed up compilation. [%default]")

	del ncore

	# get the options and locations
	opts, install_dir = parser.parse_args()

	if len(install_dir) != 1:
	parser.print_usage(sys.stderr)
	exit(1)
	install_dir = install_dir[0]

	# enable C++14
	default_cxx = "%s %s" % (default_cxx, opts.cxx14)

	# gengetopt is always needed for Herwig hg build
	if opts.herwig_hg and which('gengetopt') is None:
	opts.gengetopt = True

	if platform.system() == 'Darwin':
	# problem with dd_real from libqd
	opts.njet = False
	sys.stderr.write("* OS X: disabling NJet (need more dd_real overloads for math.h) *\n")

	if opts.gcc:
	sys.stderr.write("""
	*********************************************************
	*
	* Self-building the compilers is not supported on OS X.
	*
	* Set FC to a Fortran compiler you have installed from
	* another source (e.g. MacPorts, Fink or Homebrew) and
	* rerun bootstrap without '--build-gcc'.
	*
	*********************************************************

	""")
	sys.exit(1)

	if default_fc is None:
	sys.stderr.write("""
	*********************************************************
	*
	* Set FC to a Fortran compiler you have installed from
	* another source (e.g. MacPorts, Fink or Homebrew).
	*
	*********************************************************

	""")
	sys.exit(1)

	if not opts.gcc:
	print ("""
	*********************************************************
	* Using CC="%s" CXX="%s" FC="%s".
	* Set these environment variables to change compilers.
	*********************************************************

	""" % (default_cc,default_cxx,default_fc))

	else:
	print ("""
	*********************************************************************
	* Using self-installed CC, CXX and FC. To use other compilers,
	* remove --build-gcc and optionally set these 3 environment variables.
	*********************************************************************

	""")

	# warnings and checks for python 3
	if sys.version_info[0] == 3:
	if opts.madgraph :
	vtemp = opts.madgraph_ver.split(".")
	for i in range(0,len(vtemp)): vtemp[i]=int(vtemp[i])
	if(vtemp[0]==2 and (vtemp[1]<7 or (vtemp[1]==7 and vtemp[2]<3))) :
	print ("Version %s of Madgraph is too old to work with python 3\n" % opts.madgraph_ver)
	print ("Please use at least 2.8.1\n")
	quit()
	if which("cython") is None and which("cython3") is None:
	print (
	"""Python 3 install needs cython to rebuild lhapdf, yoda and
	rivet python interfaces
	""")
	quit()

	if which("autoreconf") is None:
	print ("Python 3 install needs autoreconf to rebuild lhapdf configure script\n")
	quit()
	sleep(1)



	# set the base directory
	current_dir=os.getcwd()

	base_dir=os.path.join(current_dir,install_dir)
	if not os.path.isdir(base_dir):
	os.mkdir(base_dir)

	opt_dir = os.path.join(base_dir,'opt')
	if not os.path.isdir(opt_dir):
	os.mkdir(opt_dir)

	if not opts.src_dir:
	src_dir = os.path.join(base_dir,'src')
	else:
	src_dir = os.path.join(current_dir,opts.src_dir)
	if not os.path.isdir(src_dir):
	os.mkdir(src_dir)

	# store the used command line for easy repetition later
	current_cmdline = [
	'CC="%s"' % default_cc,
	'CXX="%s"' % default_cxx,
	'FC="%s"' % default_fc,
	]
	current_cmdline += sys.argv

	with open(os.path.join(src_dir,'herwig_bootstrap_last_cmd'),'w') as f:
	f.write(' '.join(current_cmdline)+'\n')

	del current_cmdline

	os.chdir(src_dir)


	# set the environment variables
	bin_dir = os.path.join(base_dir,'bin')
	try:
	os.environ['PATH'] = os.pathsep.join([bin_dir, os.environ['PATH']])
	except KeyError:
	os.environ['PATH'] = bin_dir


	ld_env_name = 'LD_LIBRARY_PATH' if platform.system() != 'Darwin' else 'DYLD_LIBRARY_PATH'
	libpaths = [os.path.join(base_dir,'lib')]
	if platform.system() != 'Darwin':
	libpaths.append(os.path.join(base_dir,'lib64'))
	lib_dirs = os.pathsep.join(libpaths)
	try:
	os.environ[ld_env_name] = os.pathsep.join([lib_dirs, os.environ[ld_env_name]])
	except KeyError:
	os.environ[ld_env_name] = lib_dirs

	iloc_python=3
	try :
	int(sys.version[iloc_python])
	iloc_python+=1
	except :
	pass
	python_path = os.pathsep.join([os.path.join(base_dir,'lib64','python'+sys.version[:iloc_python],'site-packages'),
	os.path.join(base_dir,'lib', 'python'+sys.version[:iloc_python],'site-packages'),
	os.path.join(base_dir,'local', 'lib64', 'python'+sys.version[:iloc_python],'dist-packages'),
	os.path.join(base_dir,'local', 'lib', 'python'+sys.version[:iloc_python],'dist-packages')])
	try:
	os.environ['PYTHONPATH'] = os.pathsep.join([python_path, os.environ['PYTHONPATH']])
	except KeyError:
	os.environ['PYTHONPATH'] = python_path


	# storage of prefix info for individual packages
	class Prefixes(dict):
	# return None instead of raising KeyError for unknown package name
	def __missing__(self, key):
	return None
	prefix = Prefixes()

	def check_call(arglist):
	print(' '.join(arglist))
	subprocess.check_call(arglist)

	# checkout
	def checkout( location, base, version, repo, branch, repo_type='hg', revision=None) :
	os.chdir(location)
	if repo_type == 'hg':
	directory=base
	if version:
	directory += "-"+version
	if not os.path.isdir(directory):
	check_call(["hg","clone",repo,directory])
	else:
	check_call(["hg","pull","-R",directory,repo])
	os.chdir(os.path.join(location,directory))
	if revision:
	check_call(["hg","up","-r",revision])
	else:
	check_call(["hg","up",branch])
	if os.access('Makefile',os.R_OK):
	print('Makefile exists, skipping autoreconf')
	else:
	check_call(["autoreconf","-vi"])
	elif repo_type == 'git':
	directory=base
	if version:
	directory += "-"+version
	if not os.path.isdir(directory):
	check_call(["git","clone",repo,directory])
	os.chdir(os.path.join(location,directory))
	else:
	os.chdir(os.path.join(location,directory))
	check_call(["git","pull"])
	if revision:
	check_call(["git","checkout",revision])
	else:
	try :
	check_call(["git","fetch","origin",branch])
	except :
	pass
	check_call(["git","checkout",branch])
	if os.access('Makefile',os.R_OK):
	print('Makefile exists, skipping autoreconf')
	else:
	check_call(["autoreconf","-vi"])
	elif repo_type == "bzr":
	check_call(["bzr","co",repo,base])
	elif repo_type == "svn":
	if revision:
	check_call(["svn","checkout",repo+"/"+branch,base,"-r",revision])
	else:
	check_call(["svn","checkout",repo+"/"+branch,base])
	os.chdir(os.path.join(location,base))
	else:
	sys.stderr.write('Only supports checkout from hg, git, svn or bzr\n')
	exit(1)

	def download_only(url_base,tar_name,distinct=False) :
	if os.access(tar_name, os.R_OK):
	print('Found existing %s' % tar_name)
	return

	if distinct:
	program_url = url_base
	else:
	program_url = '%s/%s' % (url_base,tar_name)
	print("Download %s as %s" % (program_url,tar_name))

	req_headers = {
	'User-Agent' : 'herwig-bootstrap',
	'Accept' : '/'
	}
	request = Request(program_url, headers=req_headers)

	def response(request, verify_cert=True):
	"""Returns response from urllib, accounting for Python2/3 function
	signatures and recursive attempt without certificate validation"""
	try:
	try:
	context = ssl.create_default_context()
	if not verify_cert:
	context.check_hostname = False
	context.verify_mode = ssl.CERT_NONE
	response = urlopen(request, context=context)
	except AttributeError:
	response = urlopen(request)
	except (HTTPError) as e:
	reason = getattr(e, 'reason', '[HTTPError did not provide a reason]')
	sys.stderr.write('Remote server returned error code %s: %s\n' % (e.code, reason))
	exit(1)
	except (URLError) as e:
	sys.stderr.write('Could not reach server: %s\n' % e.reason)
	if verify_cert:
	sys.stderr.write('Trying without certificates\n')
	response = response(request, False)
	else:
	exit(1)
	else:
	return response

	response = response(request)
	with open(tar_name, 'wb') as f:
	f.write(response.read())

	def download(url_base,tar_name,args=[],distinct=False) :
	download_only(url_base,tar_name,distinct)
	# tarfile module can't use the 'with' context in Python 2.6
	tar = tarfile.open(tar_name,'r')
	lastfile = tar.getnames()[-1]
	if os.access(lastfile, os.R_OK):
	print('Extracted %s exists already' % lastfile.split('/')[0])
	else:
	print("Extract %s" % tar_name)
	tar.extractall()
	tar.close()


	def compile(config_flags=[]) :
	if os.access('Makefile',os.R_OK):
	print('Makefile exists, skipping configure')
	else:
	if not os.access('configure', os.X_OK):
	os.chmod('configure', 0o755)
	flags = ["./configure","--prefix="+base_dir]
	flags += config_flags
	check_call(flags)
	check_call(["make","-s","-j%s" % opts.ncore])

	# TODO ?? skip here if some file already exists in /lib or /bin ??
	check_call(["make","-s","install"])
	os.chdir(src_dir)

	def downloadAndCompile(url_base,base_name,suffix,config_flags) :
	download(url_base,base_name+suffix)
	os.chdir(os.path.join(src_dir,base_name))
	compile(config_flags)

	def deletelibtool() :
	os.chdir(base_dir)
	for directory in ["lib","lib64","lib32"] :
	full_path = os.path.join(base_dir,directory)
	if os.path.isdir(full_path) :
	check_call(["find",full_path,"-name","*.la","-delete"])

	GCC_SUFFIX = '-herwig-%s' % opts.gcc_ver

	def unsupported_gcc():
	sys.stderr.write("Unsupported gcc version %s requested.\n" % opts.gcc_ver)
	sys.exit(1)

	def patch(project,patchtext):
	os.chdir(os.path.join(src_dir,project))
	print('patching in %s' % os.getcwd())
	try:
	p = subprocess.Popen(['patch','-p1'], stdout=subprocess.PIPE, stdin=subprocess.PIPE, stderr=subprocess.PIPE)
	stdout_data, stderr_data = p.communicate(input=patchtext)
	print(stdout_data)
	print(stderr_data)
	if p.returncode != 0:
	sys.stderr.write('patch failed\n')
	except OSError:
	sys.stderr.write('patch failed\n')

	def buildgcc() :
	# build gmp with --enable-fat to allow portability
	# --enable-fat currently broken on Mac, see
	# https://gmplib.org/repo/gmp/raw-rev/1fab0adc5ff7
	gmp_fatoption = ['--enable-fat']
	if platform.system() == 'Darwin':
	gmp_fatoption = []
	# build gmp
	if marker_is_missing('gmp'):
	downloadAndCompile('https://gmplib.org/download/gmp',"gmp-6.2.1",".tar.bz2",gmp_fatoption)
	prefix['gmp']=base_dir
	mark_as_done('gmp')
	# build mpfr
	if marker_is_missing('mpfr'):
	downloadAndCompile('http://mpfr.loria.fr/mpfr-4.1.0',"mpfr-4.1.0",".tar.bz2",["--with-gmp="+base_dir])
	prefix['mpfr']=base_dir
	mark_as_done('mpfr')
	# build mpc
	if marker_is_missing('mpc'):
	downloadAndCompile("https://ftpmirror.gnu.org/gnu/mpc","mpc-1.2.1",".tar.gz",["--with-gmp="+base_dir,"--with-mpfr="+base_dir])
	prefix['mpc']=base_dir
	mark_as_done('mpc')
	# gcc
	download('https://ftpmirror.gnu.org/gnu/gcc/gcc-'+opts.gcc_ver,
	"gcc-%s.tar.gz" % opts.gcc_ver)

	os.chdir("gcc-%s" % opts.gcc_ver)

	obj_path=os.path.join(src_dir,"gcc-build")
	if not os.access(obj_path, os.R_OK):
	os.mkdir(obj_path)
	os.chdir(obj_path)
	else:
	os.chdir(obj_path)
	# don't use check_call here, the command may not always complete OK
	subprocess.call(["make","distclean"])
	try:
	gcc_version = list(map(int,opts.gcc_ver.split(".")[:2]))
	except:
	sys.stderr.write('Unknown gcc version format. Expecting "N.N.N".\n')
	exit(1)
	flags=["../gcc-%s/configure" % opts.gcc_ver,
	"--prefix="+base_dir,
	"--program-suffix="+GCC_SUFFIX,
	"--disable-multilib"]
	if gcc_version[0] <= 3:
	unsupported_gcc()
	elif gcc_version[0] >= 4:
	if gcc_version[0] == 4 and gcc_version[1] < 8:
	unsupported_gcc()
	else:
	flags.append("--enable-languages=c,c++,fortran")
	flags.append("--with-gmp="+base_dir)
	flags.append("--with-mpfr="+base_dir)
	flags.append("--with-mpc="+base_dir)

	check_call(flags)
	check_call(["make","-s","-j%s" % opts.ncore])
	check_call(["make","-s","install"])
	deletelibtool()
	os.chdir(src_dir)

	def lockfile_path(name,version):
	if version:
	version = '_' + version.replace('.','_')
	path = os.path.join(src_dir,
	'herwig_bootstrap_%s%s_done' % (name,version))
	return path

	def mark_as_done(name,version=''):
	lfpath = lockfile_path(name,version)
	with open(lfpath, 'w') as f:
	f.write('%s\n' % prefix[name])

	def build_needed(name,version=''):
	alternate_path = getattr(opts,'%s_loc' % name,False)
	if alternate_path:
	print('Alternative given for ' + name + '.\nUsing ' + alternate_path)
	prefix[name] = alternate_path
	return False
	cmdline_flag_set = getattr(opts,name,False) # default to false if not found

	if cmdline_flag_set:
	return marker_is_missing(name,version)
	else:
	return False

	def marker_is_missing(name,version=''):
	lfpath = lockfile_path(name,version)
	try:
	with open(lfpath) as f:
	prefixpath = f.readline().rstrip()
	except EnvironmentError:
	return True
	else:
	print('Marker file for ' + name + version + ' exists in src/, skipping build,')
	print(' using prefix=' + prefixpath)
	prefix[name] = prefixpath
	return False


	# download and compile gcc
	if build_needed('gcc'):
	buildgcc()
	mark_as_done('gcc')

	if opts.gcc:
	default_cc = os.path.join(bin_dir,'gcc%s' % GCC_SUFFIX)
	default_cxx = os.path.join(bin_dir,'g++%s %s' % (GCC_SUFFIX, opts.cxx14) )
	default_fc = os.path.join(bin_dir,'gfortran%s' % GCC_SUFFIX)

	os.environ['CC'] = default_cc
	os.environ['CXX'] = default_cxx
	os.environ['FC'] = default_fc
	os.environ['F77'] = default_fc

	if build_needed('gengetopt'):
	os.chdir(src_dir)
	tmp_ncore=opts.ncore
	opts.ncore=1
	downloadAndCompile("https://ftpmirror.gnu.org/gnu/gengetopt/",
	"gengetopt-2.22.6",".tar.gz",[])
	opts.ncore=tmp_ncore
	mark_as_done('gengetopt')


	# install boost if required
	if build_needed('boost'):
	os.chdir(src_dir)
	boost_ver2=opts.boost_ver.replace(".","_")
	boost_base = "boost_"+ boost_ver2
	try :
	download("https://boostorg.jfrog.io/artifactory/main/release/"+opts.boost_ver+"/source",
	boost_base+".tar.bz2")
	except:
	download("http://sourceforge.net/projects/boost/files/boost/"+opts.boost_ver,
	boost_base+".tar.bz2")
	os.chdir(os.path.join(src_dir,boost_base))

	# make sure we use our own compiler
	# this works as long as default_cxx is sufficiently gcc-like
	# need to separate out the cxxflag addition
	boost_cxx = ' '.join(default_cxx.split(' ')[:-1])
	boost_cxxflags = opts.cxx14

	with open('tools/build/src/user-config.jam','w') as f:
	f.write('using gcc : : "%s" : <cxxflags>"%s" ;\n'
	% (boost_cxx, boost_cxxflags))

	if opts.boost_minimal:
	check_call(["./bootstrap.sh","--prefix="+base_dir,'threading=multi',"--with-libraries=filesystem,system,test"])
	else :
	check_call(["./bootstrap.sh","--prefix="+base_dir,'threading=multi'])
	check_call(["./b2","--layout=tagged","install","-j%s" % opts.ncore])
	os.chdir(src_dir)

	# on OS X, write helper script
	if platform.system() == 'Darwin':
	helpername='./boost-osx-path-fix'
	with open(helpername,'w') as f:
	f.write(
	"""\
	#!/bin/bash
	for i in %s/lib/libboost.dylib
	do
	install_name_tool -id $i $i \|\| true
	if [ $(basename $i) == 'libboost_filesystem-mt.dylib' ]; then
	install_name_tool -change libboost_system-mt.dylib $(dirname $i)/libboost_system-mt.dylib $i \|\| true
	fi
	done
	""" % base_dir)
	os.chmod(helpername,0o755)
	check_call([helpername])

	prefix['boost']=base_dir
	mark_as_done('boost')


	# install gsl if required
	if build_needed('gsl'):
	os.chdir(src_dir)
	downloadAndCompile("https://ftpmirror.gnu.org/gnu/gsl",
	"gsl-"+opts.gsl_ver,".tar.gz",
	[])
	prefix['gsl']=base_dir
	mark_as_done('gsl')


	# install fastjet if required
	if build_needed('fastjet'):
	os.chdir(src_dir)
	downloadAndCompile("https://fastjet.fr/repo",
	"fastjet-"+opts.fastjet_ver,".tar.gz",
	["--enable-allcxxplugins","--disable-auto-ptr"])
	prefix['fastjet']=base_dir
	mark_as_done('fastjet')

	if build_needed('fastjet_contrib'):
	download("https://fastjet.hepforge.org/contrib/downloads",
	"fjcontrib-"+opts.fastjet_contrib_ver+".tar.gz")
	os.chdir(os.path.join(src_dir,"fjcontrib-"+opts.fastjet_contrib_ver))
	# force use of CXX from configure
	files=glob.glob("*/Makefile")
	files.append("Makefile.in")
	for make in files :
	with open('tmp.tmp','w') as outfile:
	with open(make) as infile:
	for line in infile:
	if("CXX=" not in line) :
	outfile.write(line)
	shutil.move('tmp.tmp',make)
	# compile
	compile(["--fastjet-config=%s/bin/fastjet-config" % prefix['fastjet']])
	# rivet needs these options for the install
	os.chdir(os.path.join(src_dir,"fjcontrib-"+opts.fastjet_contrib_ver))
	check_call(["make","fragile-shared-install","-j%s" % opts.ncore])
	os.chdir(src_dir)

	prefix['fastjet_contrib']=base_dir
	mark_as_done('fastjet_contrib')

	# install hepmc if needed
	if build_needed('hepmc'):
	if opts.hepmc_ver[0]=="2":
	download("https://hepmc.web.cern.ch/hepmc/releases",
	"hepmc"+opts.hepmc_ver+".tgz")
	try :
	os.chdir(os.path.join(src_dir,"hepmc"+opts.hepmc_ver))
	except :
	os.chdir(os.path.join(src_dir,"HepMC-"+opts.hepmc_ver))
	compile(["--with-momentum=GEV","--with-length=MM"])
	else :
	download("https://gitlab.cern.ch/hepmc/HepMC3/-/archive/"+opts.hepmc_ver,
	"HepMC3-"+opts.hepmc_ver+".tar.bz2")
	if not os.path.exists(os.path.join(src_dir,"hepmc_build")) :
	os.mkdir(os.path.join(src_dir,"hepmc_build"))
	os.chdir(os.path.join(src_dir,"hepmc_build"))
	args=["cmake",os.path.join(src_dir,"HepMC3-"+opts.hepmc_ver),
	"-DCMAKE_INSTALL_PREFIX="+base_dir,
	"-DHEPMC3_ENABLE_ROOTIO:BOOL=OFF",
	"-DHEPMC3_ENABLE_PYTHON:BOOL=OFF"]
	check_call(args)
	check_call(["make","-j%s" %opts.ncore])
	check_call(["make","install"])
	prefix['hepmc']=base_dir
	mark_as_done('hepmc')
	# install lhapdf if needed
	if build_needed('lhapdf'):
	os.chdir(src_dir)
	args=[]
	if prefix['boost']:
	args.append("--with-boost="+prefix['boost'])
	downloadAndCompile("https://lhapdf.hepforge.org/downloads",
	"LHAPDF-"+opts.lhapdf_ver, ".tar.gz",
	args)
	for pdf in opts.pdfs :
	lhapdftool = os.path.join(bin_dir,'lhapdf')
	check_call([lhapdftool,
	'--listdir='+os.path.join(base_dir,'share','LHAPDF'),
	'--pdfdir='+os.path.join(base_dir,'share','LHAPDF'),
	"install",
	pdf])

	prefix['lhapdf']=base_dir
	mark_as_done('lhapdf')

	if opts.lhapdf:
	os.environ['LHAPATH'] = os.path.join(base_dir,'share','LHAPDF')

	# install yoda if needed
	if build_needed('yoda'):
	os.chdir(src_dir)
	# from tar ball
	if not opts.yoda_git:
	download("https://yoda.hepforge.org/downloads/",
	"YODA-"+opts.yoda_ver+".tar.bz2")
	os.chdir(os.path.join(src_dir,"YODA-"+opts.yoda_ver))
	else :
	if opts.yoda_ver :
	if len(opts.yoda_ver)==5:
	branch="yoda-"+opts.yoda_ver
	else :
	branch=opts.yoda_ver
	else :
	branch=""
	checkout(src_dir,"YODA",opts.yoda_ver,opts.yoda_repo,branch,'git')
	if sys.version_info[0] == 3:
	for val in ["pyext/yoda/core.cpp","pyext/yoda/util.cpp"]:
	if os.path.isfile(val) : os.remove(val)

	compile([] if opts.yoda_root else ['--disable-root'])
	prefix['yoda']=base_dir
	mark_as_done('yoda')

	# install rivet if needed
	if build_needed('rivet'):
	os.chdir(src_dir)
	# from tar ball
	if not opts.rivet_git:
	download("https://rivet.hepforge.org/downloads/",
	"Rivet-"+opts.rivet_ver+".tar.bz2")
	os.chdir(os.path.join(src_dir,"Rivet-"+opts.rivet_ver))
	else:
	if len(opts.rivet_ver)==5:
	branch="rivet-"+opts.rivet_ver
	else:
	branch=opts.rivet_ver
	checkout(src_dir,"Rivet",opts.rivet_ver,opts.rivet_repo,branch,'git')

	if os.path.exists(base_dir+"/lib64") and os.path.isfile(base_dir+"/lib/libfastjetcontribfragile.so"):
	print("soft linking lib/fastjetcontribfragile.so to lib64")
	os.system("ln -s "+base_dir+"/lib/libfastjetcontribfragile.so "+base_dir+"/lib64/libfastjetcontribfragile.so")

	args = []
	for tool in ['yoda','hepmc','fastjet', 'fastjet_contrib']:
	if prefix[tool]:
	if tool == "hepmc" and opts.hepmc_ver[0]=="3" :
	args.append( "--with-%s3=%s" % (tool,prefix[tool]) )
	elif tool == "fastjet_contrib":
	args.append( "--with-fjcontrib=%s" % (prefix[tool]) )
	else:
	args.append( "--with-%s=%s" % (tool,prefix[tool]) )

	compile(args)
	prefix['rivet']=base_dir
	mark_as_done('rivet')


	# install thepeg if needed
	if build_needed('thepeg',opts.thepeg_ver):
	os.chdir(src_dir)
	# from tar ball

	if not opts.thepeg_hg:
	download("https://thepeg.hepforge.org/downloads","ThePEG-"+opts.thepeg_ver+".tar.bz2")
	os.chdir(os.path.join(src_dir,"ThePEG-"+opts.thepeg_ver))
	else:
	if len(opts.thepeg_ver)==5:
	branch="release-"+opts.thepeg_ver[:3].replace(".","-")
	else:
	branch=opts.thepeg_ver
	checkout(src_dir,"ThePEG",opts.thepeg_ver,opts.thepeg_repo,branch)

	args=[]
	for tool in ['boost','gsl','rivet','hepmc','fastjet','lhapdf']:
	if prefix[tool]:
	args.append( "--with-%s=%s" % (tool,prefix[tool]) )
	if tool == "hepmc" and opts.hepmc_ver[0]=="3" :
	args.append("--with-hepmcversion=3")
	compile(args)
	prefix['thepeg']=base_dir
	mark_as_done('thepeg',opts.thepeg_ver)

	# function to run madgraph
	def runMadgraph(mgCommand) :
	with open('proc.dat', 'w') as f:
	f.write(mgCommand)
	mg_exe = os.path.join(prefix['madgraph'],'bin','mg5_aMC')
	try :
	check_call([mg_exe,'proc.dat'])
	except :
	check_call(['python2',mg_exe,'proc.dat'])

	# install madgraph
	if build_needed('madgraph'):
	os.chdir(src_dir)
	# from tar ball
	if not opts.madgraph_bzr:
	mg_name = "MG5_aMC_v"+opts.madgraph_ver.replace(".","_")
	mg_tar = "MG5_aMC_v%s" % opts.madgraph_ver

	if sys.version_info[0] == 3 and opts.madgraph_ver == "2.7.3" :
	mg_name +="_py3"
	mg_tar+=".py3"
	mg_tar+=".tar.gz"
	try :
	download("http://madgraph.physics.illinois.edu/Downloads/",mg_tar)
	except :
	print("Madgraph download for Illinois server failed, trying launchpad")
	vSplit=opts.madgraph_ver.split(".")
	mg_loc="https://launchpad.net/mg5amcnlo/%s.0/%s.%s.x/+download" % (vSplit[0],vSplit[0],
	vSplit[1])
	download(mg_loc,mg_tar)
	prefix['madgraph']=os.path.join(opt_dir, mg_name)
	print('mv ' + os.path.join(src_dir, mg_name) + os.path.join(opt_dir, mg_name))
	shutil.move(os.path.join(src_dir, mg_name), os.path.join(opt_dir, mg_name))
	del mg_name
	else :
	checkout(opt_dir,"madgraph",opts.madgraph_ver,opts.madgraph_repo,"",'bzr')
	prefix['madgraph']=os.path.join(opt_dir,"madgraph")

	# temp directory for madgraph
	mg_tmp_dir = os.path.join(prefix['madgraph'],'tmp_hw_bootstrap_test')

	if not os.path.isdir(mg_tmp_dir):
	os.mkdir(mg_tmp_dir)

	os.chdir(mg_tmp_dir)

	# run madgraph so loop stuff is installed
	# and try to automatically convert all python2 models
	# Note: the command "set acknowledged_v3.1_syntax True --global"
	# reverts MG >= 3.2.0 syntax to before 3.1.
	mg_initial_run = """\
	set auto_update 0
	set cpp_compiler {cxx}
	set fortran_compiler {fc}
	set auto_convert_model T
	set acknowledged_v3.1_syntax True --global
	import model sm
	generate g g > h > w+ w- [virt=QCD]
	output

	""".format(cxx=default_cxx,fc=default_fc)

	runMadgraph(mg_initial_run)

	# force import of the heft model
	heftTemplate = """\
	set auto_update 0
	set cpp_compiler {cxx}
	set fortran_compiler {fc}
	{convert}
	import model heft

	"""
	mg_heft = heftTemplate.format(cxx=default_cxx,fc=default_fc,convert="set auto_convert_model T")
	runMadgraph(mg_heft)
	# remove tmp directory
	shutil.rmtree(mg_tmp_dir)

	mark_as_done('madgraph')

	# install the NLO codes if needed
	# install njet if required
	if build_needed('njet'):
	os.chdir(src_dir)
	download("https://bitbucket.org/njet/njet/downloads",
	"njet-"+opts.njet_ver+".tar.gz")
	patch("njet-"+opts.njet_ver,
	b"""\
	diff blha/njet_olp.cpp
	--- a/blha/njet_olp.cpp 2014-04-25 12:38:30.000000000 +0100
	+++ b/blha/njet_olp.cpp 2016-11-22 12:44:34.187725299 +0000
	@@ -1076,12 +1076,12 @@
	string line;
	int linenum = 0;

	- while (is_good && (is_good = getline(*input, line))) {
	+ while (is_good && (is_good = bool(getline(*input, line)))) {
	linenum++;
	if (line.find(SIGNPREF) == 0) {
	is_njet = true;
	if (stringstream(line.substr(SIGNPREF.length())) >> signval) {
	- is_good = getline(*input, line);
	+ is_good = bool(getline(*input, line));
	linenum++;
	body.push_back(line);
	continue;
	""")
	compile(["--disable-autoflags",
	"FC="+default_fc,
	"F77="+default_fc,
	"FFLAGS=-std=legacy"])
	prefix['njet']=base_dir
	mark_as_done('njet')


	OPENLOOPS_CONFIG = """\
	[OpenLoops]
	fortran_compiler = {fc}
	compile_extra = 0
	"""

	# install openloops if needed
	if build_needed('openloops'):
	if not opts.openloops_svn:
	os.chdir(opt_dir)
	download("https://openloops.hepforge.org/downloads","OpenLoops-"+opts.openloops_ver+".tar.gz")
	os.chdir(os.path.join(opt_dir,"OpenLoops-"+opts.openloops_ver))

	with open('openloops.cfg','w') as f:
	f.write(OPENLOOPS_CONFIG.format(fc=default_fc))

	# We know our gcc works. Disable the strange test that uses the system version number.
	if opts.gcc:
	searchtext = "env.subst('$CCVERSION').split('.')[:2])) < (4,6)"
	with open('tmp.tmp','w') as outfile:
	with open('SConstruct') as infile:
	for line in infile:
	outfile.write(line.replace(searchtext, searchtext + " and False"))
	shutil.move('tmp.tmp','SConstruct')
	del searchtext
	check_call(["./scons","--jobs=%s" % opts.ncore])
	check_call(["./openloops","libinstall",opts.openloops_processes,
	"num_jobs=%s" % opts.ncore])
	os.chdir(src_dir)
	prefix['openloops']=opt_dir+"/OpenLoops-"+opts.openloops_ver
	mark_as_done('openloops')
	else:
	checkout(opt_dir,"OpenLoops",opts.openloops_ver,opts.openloops_repo,opts.openloops_ver,'svn',
	revision='1945')

	with open('openloops.cfg','w') as f:
	f.write(OPENLOOPS_CONFIG.format(fc=default_fc))

	# We know our gcc works. Disable the strange test that uses the system version number.
	if opts.gcc:
	searchtext = "env.subst('$CCVERSION').split('.')[:2])) < (4,6)"
	with open('tmp.tmp','w') as outfile:
	with open('SConstruct') as infile:
	for line in infile:
	outfile.write(line.replace(searchtext, searchtext + " and False"))
	shutil.move('tmp.tmp','SConstruct')
	del searchtext

	check_call(["./openloops","libinstall",opts.openloops_processes,
	"num_jobs=%s" % opts.ncore])
	os.chdir(src_dir)
	prefix['openloops']=opt_dir+"/OpenLoops"
	mark_as_done('openloops')


	# install gosam if needed
	if build_needed('gosam'):
	os.chdir(src_dir)
	# build qgraf
	if marker_is_missing('qgraf'):
	download("https://herwig.hepforge.org/downloads/mirror","qgraf-3.4.2.tgz")
	os.chdir(os.path.join(src_dir,'qgraf-3.4.2'))
	check_call([default_fc,'qgraf-3.4.2.f','-o','qgraf','-O2'])
	shutil.move('qgraf',os.path.join(bin_dir,'qgraf'))
	prefix['qgraf']=base_dir
	os.chdir(src_dir)
	mark_as_done('qgraf')
	# build form
	if marker_is_missing('form'):
	download("https://github.com/vermaseren/form/releases/download/v4.2.1","form-4.2.1.tar.gz")
	os.chdir(os.path.join(src_dir,'form-4.2.1'))
	compile([])
	prefix['form']=base_dir
	mark_as_done('form')
	# build gosam-contrib
	if marker_is_missing('gosam-contrib'):
	download('https://github.com/gudrunhe/gosam-contrib/releases/download/gosam-contrib-2.0-20200904/gosam-contrib-2.0-20200904.tar.gz',
	"gosam-contrib-2.0.tar.gz", distinct=True)
	os.chdir(os.path.join(src_dir,'gosam-contrib-2.0'))
	# Gosams build system sometimes hangs and needs a second trial
	try:
	compile(["FFLAGS=-std=legacy"])
	except subprocess.CalledProcessError:
	compile(["FFLAGS=-std=legacy"])
	prefix['gosam-contrib']=base_dir
	mark_as_done('gosam-contrib')

	download('https://github.com/gudrunhe/gosam/releases/download/2.1.1/gosam-2.1.1-4b98559.tar.gz','gosam-2.1.1.tar.gz', distinct=True)
	try:
	os.chdir(os.path.join(src_dir,'gosam-2.1.1-4b98559'))
	except OSError:
	os.chdir(os.path.join(src_dir,'gosam'))

	check_call(["./setup.py",
	"install",
	"--prefix="+base_dir,
	"-f"])
	os.chdir(src_dir)
	prefix['gosam']=base_dir
	mark_as_done('gosam')


	# install vbfnlo if required
	if build_needed('vbfnlo'):
	os.chdir(src_dir)
	# from tar ball
	if not opts.vbfnlo_git:
	download("https://www.itp.kit.edu/vbfnlo/archive","vbfnlo-"+opts.vbfnlo_ver+".tgz")
	os.chdir(os.path.join(src_dir,"VBFNLO-"+opts.vbfnlo_ver))
	else:
	checkout(src_dir,"VBFNLO",opts.vbfnlo_ver,opts.vbfnlo_repo,"v"+opts.vbfnlo_ver,'git')
	if opts.vbfnlo_ver == "3.0.0beta1" or opts.vbfnlo_ver == "3.0.0beta2":
	# 3.0.0beta1 and 2 did not yet accept setting F77
	del os.environ['F77']
	check_call(["./configure","--prefix="+base_dir,"--enable-processes="+opts.vbfnlo_processes,
	"FCFLAGS=-std=legacy"])
	check_call(["make","-s","-j%s"%opts.ncore])
	check_call(["make","-s","install"])
	if opts.vbfnlo_ver == "3.0.0beta1" or opts.vbfnlo_ver == "3.0.0beta2":
	# reinsert F77 for the others
	os.environ['F77'] = default_fc
	os.chdir(src_dir)
	prefix['vbfnlo']=base_dir
	mark_as_done('vbfnlo')

	# # install TAUOLA if needed
	# if build_needed('tauola'):
	# download("http://tauolapp.web.cern.ch/tauolapp/resources/TAUOLA." + opts.tauola_ver,
	# "TAUOLA." + opts.tauola_ver + ".tar.gz")
	# os.chdir(os.path.join(src_dir,"TAUOLA"))
	# args=["./configure","--prefix="+base_dir]
	# if prefix['hepmc']:
	# args.append("--with-hepmc="+prefix['hepmc'])
	# check_call(args)
	# check_call(["make"])
	# check_call(["make","install"])
	# os.chdir(src_dir)
	# prefix['tauola']=base_dir
	# mark_as_done('tauola')

	# # install PHOTOS if needed
	# if build_needed('photos'):
	# download("http://photospp.web.cern.ch/photospp/resources/PHOTOS."+opts.photos_ver,
	# "PHOTOS."+opts.photos_ver+".tar.gz")
	# os.chdir(os.path.join(src_dir,"PHOTOS"))
	# args=["./configure","--prefix="+base_dir]
	# if prefix['hepmc']:
	# args.append("--with-hepmc="+prefix['hepmc'])
	# check_call(args)
	# check_call(["make","-j%s" % opts.ncore])
	# check_call(["make","install"])
	# os.chdir(src_dir)
	# prefix['photos']=base_dir
	# mark_as_done('photos')

	# install Pytiha8 if needed
	if build_needed('pythia'):
	os.chdir(src_dir)
	pythia_version = "8.307".replace(".","")
	download("https://pythia.org/download/pythia83","pythia%s.tgz" % pythia_version)
	os.chdir(os.path.join(src_dir,"pythia%s" % pythia_version))
	args=["./configure",
	"--prefix=%s" % base_dir,
	"--enable-shared",]
	### newer versions need this instead of USRCXXFLAGS
	### "--cxx-common='-O2 -pedantic -W -Wall -Wshadow'"]
	if prefix['hepmc']:
	if opts.hepmc_ver[0]=="2" :
	args.append("--with-hepmc2=%s" % prefix['hepmc'])
	else :
	args.append("--with-hepmc3=%s" % prefix['hepmc'])
	os.environ['USRCXXFLAGS'] = opts.cxx14
	check_call(args)
	check_call(["make","-j%s" % opts.ncore])
	check_call(["make","-s","install"])
	del os.environ['USRCXXFLAGS']
	os.chdir(src_dir)
	prefix['pythia'] = base_dir
	mark_as_done('pythia')

	# install EvtGen if needed
	if build_needed('evtgen'):
	os.chdir(src_dir)
	evtgen_version = '02.02.00'
	evtgen_srcpath = os.path.join('EvtGen', 'R'+evtgen_version.replace('.','-'))
	download("https://evtgen.hepforge.org/downloads",
	"EvtGen-%s.tar.gz" % evtgen_version)
	if not os.path.exists(os.path.join(src_dir,"evtgen_build")) :
	os.mkdir(os.path.join(src_dir,"evtgen_build"))
	os.chdir(os.path.join(src_dir,"evtgen_build"))

	args=["cmake",os.path.join(src_dir,evtgen_srcpath),"-DCMAKE_INSTALL_PREFIX="+base_dir]
	if prefix['hepmc'] and opts.hepmc_ver[0]=="2":
	args.append("-DEVTGEN_HEPMC3=OFF")
	args.append("-DHEPMC2_ROOT_DIR="+prefix['hepmc'])
	# if prefix['tauola']:
	# args.append("--tauoladir="+prefix['tauola'])
	# if prefix['photos']:
	# args.append("--photosdir="+prefix['photos'])
	if prefix['pythia']:
	args.append("-DEVTGEN_PYTHIA=ON")
	args.append("-DPYTHIA8_ROOT_DIR="+prefix['pythia'])
	check_call(args)
	# Has to be single thread build. Dependencies are broken otherwise.
	check_call(["make","-j1"])
	check_call(["make","install"])
	if platform.system() == 'Darwin':
	# fix path settings to help autodetection of lib locations
	os.chdir(os.path.join(base_dir,'lib'))
	for i in ["libEvtGen.dylib", "libEvtGenExternal.dylib"]:
	check_call(["install_name_tool","-id",os.path.join(os.getcwd(),i),i])
	for i in ["libEvtGen.dylib","libpythia8.dylib","liblhapdfdummy.dylib"]:
	check_call(["install_name_tool","-change",i,os.path.join(os.getcwd(),i),"libEvtGenExternal.dylib"])

	os.chdir(src_dir)
	prefix['evtgen']=base_dir
	mark_as_done('evtgen')

	# install herwig if needed
	if build_needed('herwig',opts.herwig_ver):
	os.chdir(src_dir)
	# from tar ball
	if not opts.herwig_hg:
	download("https://herwig.hepforge.org/downloads/","Herwig-"+opts.herwig_ver+".tar.bz2")
	os.chdir(os.path.join(src_dir,"Herwig-"+opts.herwig_ver))
	else:
	if len(opts.herwig_ver)==5:
	branch = "herwig-"+opts.herwig_ver[:3].replace(".","-")
	else:
	branch = opts.herwig_ver
	checkout(src_dir,"Herwig",opts.herwig_ver,opts.herwig_repo,branch)
	args=[]
	for tool in ['thepeg','boost','gsl','fastjet',
	'madgraph','njet','openloops','gosam','vbfnlo',
	'pythia','evtgen']:
	if prefix[tool]:
	args.append( "--with-%s=%s" % (tool,prefix[tool]) )
	compile(args)
	prefix['herwig']=base_dir
	mark_as_done('herwig',opts.herwig_ver)

	# need to have Herwig if we want HJets++
	if not opts.herwig:
	opts.hjets = False

	# install hjets if needed
	if build_needed('hjets'):
	os.chdir(src_dir)
	# from tar ball
	if not opts.hjets_hg:
	download("http://www.hepforge.org/archive/hjets",
	"HJets-"+opts.hjets_ver+".tar.bz2")
	os.chdir(os.path.join(src_dir,"HJets-"+opts.hjets_ver))
	else :
	if len(opts.hjets_ver)==3:
	branch = "release "+opts.hjets_ver
	else:
	branch = opts.hjets_ver
	checkout(src_dir,"HJets",opts.hjets_ver,opts.hjets_repo,branch)
	args=[]
	args.append("--with-herwig="+prefix['herwig'])
	del os.environ['F77']
	compile(args)
	os.environ['F77'] = default_fc
	prefix['hjets']=base_dir
	lib_dirs = os.pathsep.join([os.path.join(prefix['hjets'], 'lib64','HJets'),
	os.path.join(prefix['hjets'], 'lib','HJets'),
	lib_dirs])
	mark_as_done('hjets')

	# generate an 'activate' shell include like python's virtualenv does
	from string import Template

	class ShellTemplate(Template):
	delimiter = '@'

	ACTIVATE = ShellTemplate("""\
	# Herwig bootstrap 'activate',
	# based on Python's virtualenv mechanism

	# This file must be used with "source @{bin_dir}/activate"
	# from bash or zsh. You cannot run it directly.

	deactivate () {

	# reset old environment variables
	if [ "${_OLD_VIRTUAL_PATH-}" = "Unset" ] ; then
	unset PATH
	unset _OLD_VIRTUAL_PATH
	elif [ -n "${_OLD_VIRTUAL_PATH-}" ] ; then
	PATH="$_OLD_VIRTUAL_PATH"
	export PATH
	unset _OLD_VIRTUAL_PATH
	fi

	if [ "${_OLD_VIRTUAL_PYTHONPATH-}" = "Unset" ] ; then
	unset PYTHONPATH
	unset _OLD_VIRTUAL_PYTHONPATH
	elif [ -n "${_OLD_VIRTUAL_PYTHONPATH-}" ] ; then
	PYTHONPATH="$_OLD_VIRTUAL_PYTHONPATH"
	export PYTHONPATH
	unset _OLD_VIRTUAL_PYTHONPATH
	fi

	if [ "${_OLD_VIRTUAL_LHAPATH-}" = "Unset" ] ; then
	unset LHAPATH
	unset _OLD_VIRTUAL_LHAPATH
	elif [ -n "${_OLD_VIRTUAL_LHAPATH-}" ] ; then
	LHAPATH="$_OLD_VIRTUAL_LHAPATH"
	export LHAPATH
	unset _OLD_VIRTUAL_LHAPATH
	fi

	if [ "${_OLD_VIRTUAL_@{ld_env_name}-}" = "Unset" ] ; then
	unset @{ld_env_name}
	unset _OLD_VIRTUAL_@{ld_env_name}
	elif [ -n "${_OLD_VIRTUAL_@{ld_env_name}-}" ] ; then
	@{ld_env_name}="$_OLD_VIRTUAL_@{ld_env_name}"
	export @{ld_env_name}
	unset _OLD_VIRTUAL_@{ld_env_name}
	fi

	if [ "${_OLD_VIRTUAL_CC-}" = "Unset" ] ; then
	unset CC
	unset _OLD_VIRTUAL_CC
	elif [ -n "${_OLD_VIRTUAL_CC-}" ] ; then
	CC="$_OLD_VIRTUAL_CC"
	export CC
	unset _OLD_VIRTUAL_CC
	fi

	if [ "${_OLD_VIRTUAL_CXX-}" = "Unset" ] ; then
	unset CXX
	unset _OLD_VIRTUAL_CXX
	elif [ -n "${_OLD_VIRTUAL_CXX-}" ] ; then
	CXX="$_OLD_VIRTUAL_CXX"
	export CXX
	unset _OLD_VIRTUAL_CXX
	fi

	if [ "${_OLD_VIRTUAL_FC-}" = "Unset" ] ; then
	unset FC
	unset _OLD_VIRTUAL_FC
	elif [ -n "${_OLD_VIRTUAL_FC-}" ] ; then
	FC="$_OLD_VIRTUAL_FC"
	export FC
	unset _OLD_VIRTUAL_FC
	fi

	if [ "${_OLD_VIRTUAL_F77-}" = "Unset" ] ; then
	unset F77
	unset _OLD_VIRTUAL_F77
	elif [ -n "${_OLD_VIRTUAL_F77-}" ] ; then
	F77="$_OLD_VIRTUAL_F77"
	export F77
	unset _OLD_VIRTUAL_F77
	fi

	# This should detect bash and zsh, which have a hash command that must
	# be called to get it to forget past commands. Without forgetting
	# past commands the $PATH changes we made may not be respected
	if [ -n "${BASH-}" -o -n "${ZSH_VERSION-}" ] ; then
	hash -r 2>/dev/null
	fi

	if [ -n "${_OLD_VIRTUAL_PS1-}" ] ; then
	PS1="$_OLD_VIRTUAL_PS1"
	export PS1
	unset _OLD_VIRTUAL_PS1
	fi

	unset TEXMFHOME
	unset HOMETEXMF
	unset TEXMFCNF
	unset TEXINPUTS
	unset LATEXINPUTS
	unset HERWIG_ENV
	if [ ! "${1-}" = "nondestructive" ] ; then
	# Self destruct!
	unset -f deactivate
	fi
	}

	# unset irrelevant variables
	deactivate nondestructive

	HERWIG_ENV="@{base_dir}"
	export HERWIG_ENV

	# adding the path to rivet latex required packages
	export TEXMFHOME="${HERWIG_ENV}/share/Rivet/texmf:$TEXMFHOME"
	export HOMETEXMF="${HERWIG_ENV}/share/Rivet/texmf:$HOMETEXMF"
	export TEXMFCNF="${HERWIG_ENV}/share/Rivet/texmf/cnf:$TEXMFCNF"
	export TEXINPUTS="${HERWIG_ENV}/share/Rivet/texmf/tex//:$TEXINPUTS"
	export LATEXINPUTS="${HERWIG_ENV}/share/Rivet/texmf/tex//:$LATEXINPUTS"

	_OLD_VIRTUAL_PATH="${PATH-Unset}"
	PATH="@{bin_dir}:$PATH"
	export PATH

	_OLD_VIRTUAL_PYTHONPATH="${PYTHONPATH-Unset}"
	PYTHONPATH="@{python_path}:$PYTHONPATH"
	export PYTHONPATH

	_OLD_VIRTUAL_LHAPATH="${LHAPATH-Unset}"
	LHAPATH="@{lha_path}:$LHAPATH"
	export LHAPATH

	_OLD_VIRTUAL_@{ld_env_name}="${@{ld_env_name}-Unset}"
	@{ld_env_name}="@{lib_dirs}:$@{ld_env_name}"
	export @{ld_env_name}

	_OLD_VIRTUAL_CC="${CC-Unset}"
	CC="@{default_cc}"
	export CC

	_OLD_VIRTUAL_CXX="${CXX-Unset}"
	CXX="@{default_cxx}"
	export CXX

	_OLD_VIRTUAL_FC="${FC-Unset}"
	FC="@{default_fc}"
	export FC

	_OLD_VIRTUAL_F77="${F77-Unset}"
	F77="@{default_fc}"
	export F77

	if [ -z "${HERWIG_ENV_DISABLE_PROMPT-}" ] ; then
	_OLD_VIRTUAL_PS1="$PS1"
	if [ "x" != x ] ; then
	PS1="$PS1"
	else
	PS1="(`basename \"$HERWIG_ENV\"`)$PS1"
	fi
	export PS1
	fi

	# This should detect bash and zsh, which have a hash command that must
	# be called to get it to forget past commands. Without forgetting
	# past commands the $PATH changes we made may not be respected
	if [ -n "${BASH-}" -o -n "${ZSH_VERSION-}" ] ; then
	hash -r 2>/dev/null
	fi

	""")

	subs = {
	'ld_env_name' : ld_env_name,
	'bin_dir' : bin_dir,
	'base_dir' : base_dir,
	'python_path' : python_path,
	'lib_dirs' : lib_dirs,
	'default_cc' : os.path.basename(default_cc),
	'default_cxx' : os.path.basename(default_cxx),
	'default_fc' : os.path.basename(default_fc),
	'lha_path' : os.path.join(base_dir,'share','LHAPDF')
	}

	activate_file = os.path.join(bin_dir,'activate')

	with open(activate_file,'w') as f:
	f.write(ACTIVATE.substitute(subs))


	# back to the original directory
	os.chdir(current_dir)

	try:
	path_to_activate = os.path.join(os.path.relpath(bin_dir,current_dir),'activate')
	except:
	path_to_activate = activate_file

	print ("""
	################ / / ^^/ ##########################
	############### /--/ / ###########################
	############## / / / ############################

	Herwig 7 bootstrap was successful.

	$ source %s

	activates all required environment variables.

	$ deactivate

	returns to the original environment variables.
	""" % path_to_activate)

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