#! /usr/bin/env python
# encoding: utf-8

import re
import Utils,Options
_options=[x.split(', ')for x in'''
bindir, user executables, $(EXEC_PREFIX)/bin
sbindir, system admin executables, $(EXEC_PREFIX)/sbin
libexecdir, program executables, $(EXEC_PREFIX)/libexec
sysconfdir, read-only single-machine data, $(PREFIX)/etc
sharedstatedir, modifiable architecture-independent data, $(PREFIX)/com
localstatedir, modifiable single-machine data, $(PREFIX)/var
libdir, object code libraries, $(EXEC_PREFIX)/lib
includedir, C header files, $(PREFIX)/include
oldincludedir, C header files for non-gcc, /usr/include
datarootdir, read-only arch.-independent data root, $(PREFIX)/share
datadir, read-only architecture-independent data, $(DATAROOTDIR)
infodir, info documentation, $(DATAROOTDIR)/info
localedir, locale-dependent data, $(DATAROOTDIR)/locale
mandir, man documentation, $(DATAROOTDIR)/man
docdir, documentation root, $(DATAROOTDIR)/doc/$(PACKAGE)
htmldir, html documentation, $(DOCDIR)
dvidir, dvi documentation, $(DOCDIR)
pdfdir, pdf documentation, $(DOCDIR)
psdir, ps documentation, $(DOCDIR)
'''.split('\n')if x]
re_var=re.compile(r'\$\(([a-zA-Z0-9_]+)\)')
def subst_vars(foo,vars):
	def repl(m):
		s=m.group(1)
		return s and''+vars[s]or''
	return re_var.sub(repl,foo)
def detect(conf):
	def get_param(varname,default):
		return getattr(Options.options,varname,'')or default
	env=conf.env
	env['EXEC_PREFIX']=get_param('EXEC_PREFIX',env['PREFIX'])
	env['PACKAGE']=Utils.g_module.APPNAME or env['PACKAGE']
	complete=False
	iter=0
	while not complete and iter<len(_options)+1:
		iter+=1
		complete=True
		for name,help,default in _options:
			name=name.upper()
			if not env[name]:
				try:
					env[name]=subst_vars(get_param(name,default),env)
				except TypeError:
					complete=False
	if not complete:
		lst=[name for name,_,_ in _options if not env[name.upper()]]
		raise Utils.WafError('Variable substitution failure %r'%lst)
def set_options(opt):
	inst_dir=opt.add_option_group('Installation directories','By default, "waf install" will put the files in\
 "/usr/local/bin", "/usr/local/lib" etc. An installation prefix other\
 than "/usr/local" can be given using "--prefix", for example "--prefix=$HOME"')
	for k in('--prefix','--destdir'):
		option=opt.parser.get_option(k)
		if option:
			opt.parser.remove_option(k)
			inst_dir.add_option(option)
	inst_dir.add_option('--exec-prefix',help='installation prefix [Default: $(PREFIX)]',default='',dest='EXEC_PREFIX')
	dirs_options=opt.add_option_group('Pre-defined installation directories','')
	for name,help,default in _options:
		option_name='--'+name
		str_default=default
		str_help='%s [Default: %s]'%(help,str_default)
		dirs_options.add_option(option_name,help=str_help,default='',dest=name.upper())

