source: swig/swig.py @ 020d80e

#! /usr/bin/env python
# encoding: UTF-8
# Petar Forai
# Thomas Nagy 2008

import re
import Task, Utils, Logs
from TaskGen import extension
from Configure import conf
import preproc

SWIG_EXTS = ['.swig', '.i']

swig_str = '${SWIG} ${SWIGFLAGS} ${SRC}'
cls = Task.simple_task_type('swig', swig_str, color='BLUE', before='cc cxx')

re_module = re.compile('%module(?:\s*\(.*\))?\s+(.+)', re.M)

re_1 = re.compile(r'^%module.*?\s+([\w]+)\s*?$', re.M)
re_2 = re.compile('%include "(.*)"', re.M)
re_3 = re.compile('#include "(.*)"', re.M)

def scan(self):
        "scan for swig dependencies, climb the .i files"
        env = self.env

        lst_src = []

        seen = []
        to_see = [self.inputs[0]]

        while to_see:
                node = to_see.pop(0)
                if node.id in seen:
                        continue
                seen.append(node.id)
                lst_src.append(node)

                # read the file
                code = node.read(env)
                code = preproc.re_nl.sub('', code)
                code = preproc.re_cpp.sub(preproc.repl, code)

                # find .i files and project headers
                names = re_2.findall(code) + re_3.findall(code)
                for n in names:
                        for d in self.generator.swig_dir_nodes + [node.parent]:
                                u = d.find_resource(n)
                                if u:
                                        to_see.append(u)
                                        break
                        else:
                                Logs.warn('could not find %r' % n)

        # list of nodes this one depends on, and module name if present
        if Logs.verbose:
                Logs.debug('deps: deps for %s: %s' % (str(self), str(lst_src)))
        return (lst_src, [])
cls.scan = scan

# provide additional language processing
swig_langs = {}
def swig(fun):
        swig_langs[fun.__name__.replace('swig_', '')] = fun

@swig
def swig_python(tsk):
        tsk.set_outputs(tsk.inputs[0].parent.find_or_declare(tsk.module + '.py'))

@swig
def swig_ocaml(tsk):
        tsk.set_outputs(tsk.inputs[0].parent.find_or_declare(tsk.module + '.ml'))
        tsk.set_outputs(tsk.inputs[0].parent.find_or_declare(tsk.module + '.mli'))

def add_swig_paths(self):
        if getattr(self, 'add_swig_paths_done', None):
                return
        self.add_swig_paths_done = True

        self.swig_dir_nodes = []
        for x in self.to_list(self.includes):
                node = self.path.find_dir(x)
                if not node:
                        Logs.warn('could not find the include %r' % x)
                        continue
                self.swig_dir_nodes.append(node)

        # add the top-level, it is likely to be added
        self.swig_dir_nodes.append(self.bld.srcnode)
        for x in self.swig_dir_nodes:
                self.env.append_unique('SWIGFLAGS', '-I%s' % x.abspath(self.env)) # build dir
                self.env.append_unique('SWIGFLAGS', '-I%s' % x.abspath()) # source dir

@extension(SWIG_EXTS)
def i_file(self, node):
        flags = self.to_list(getattr(self, 'swig_flags', []))

        ext = '.swigwrap_%d.c' % self.idx
        if '-c++' in flags:
                ext += 'xx'

        # the user might specify the module directly
        module = getattr(self, 'swig_module', None)
        if not module:
                # else, open the files and search
                txt = node.read(self.env)
                m = re_module.search(txt)
                if not m:
                        raise "for now we are expecting a module name in the main swig file"
                module = m.group(1)
        out_node = node.parent.find_or_declare(module + ext)

        # the task instance
        tsk = self.create_task('swig')
        tsk.set_inputs(node)
        tsk.set_outputs(out_node)
        tsk.module = module
        tsk.env['SWIGFLAGS'] = flags

        if not '-outdir' in flags:
                flags.append('-outdir')
                flags.append(node.parent.abspath(self.env))

        if not '-o' in flags:
                flags.append('-o')
                flags.append(out_node.abspath(self.env))

        # add the language-specific output files as nodes
        # call funs in the dict swig_langs
        for x in flags:
                # obtain the language
                x = x[1:]
                try:
                        fun = swig_langs[x]
                except KeyError:
                        pass
                else:
                        fun(tsk)

        self.allnodes.append(out_node)

        add_swig_paths(self)

@conf
def check_swig_version(conf, minver=None):
        """Check for a minimum swig version  like conf.check_swig_version('1.3.28')
        or conf.check_swig_version((1,3,28)) """
        reg_swig = re.compile(r'SWIG Version\s(.*)', re.M)

        swig_out = Utils.cmd_output('%s -version' % conf.env['SWIG'])

        swigver = [int(s) for s in reg_swig.findall(swig_out)[0].split('.')]
        if isinstance(minver, basestring):
                minver = [int(s) for s in minver.split(".")]
        if isinstance(minver, tuple):
                minver = [int(s) for s in minver]
        result = (minver is None) or (minver[:3] <= swigver[:3])
        swigver_full = '.'.join(map(str, swigver))
        if result:
                conf.env['SWIG_VERSION'] = swigver_full
        minver_str = '.'.join(map(str, minver))
        if minver is None:
                conf.check_message_custom('swig version', '', swigver_full)
        else:
                conf.check_message('swig version', '>= %s' % (minver_str,), result, option=swigver_full)
        return result

def detect(conf):
        swig = conf.find_program('swig', var='SWIG', mandatory=True)