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#! /usr/bin/env python
# encoding: UTF-8
# Petar Forai
# Thomas Nagy 2008-2010 (ita)
import re
from waflib import Task, Logs
from waflib.TaskGen import extension, feature, after_method
from waflib.Configure import conf
from waflib.Tools import c_preproc
"""
tasks have to be added dynamically:
- swig interface files may be created at runtime
- the module name may be unknown in advance
"""
SWIG_EXTS = ['.swig', '.i']
re_module = re.compile(r'%module(?:\s*\(.*\))?\s+(.+)', re.M)
re_1 = re.compile(r'^%module.*?\s+([\w]+)\s*?$', re.M)
re_2 = re.compile(r'[#%](?:include|import(?:\(module=".*"\))+|python(?:begin|code)) [<"](.*)[">]', re.M)
class swig(Task.Task):
color = 'BLUE'
run_str = '${SWIG} ${SWIGFLAGS} ${SWIGPATH_ST:INCPATHS} ${SWIGDEF_ST:DEFINES} ${SRC}'
ext_out = ['.h'] # might produce .h files although it is not mandatory
vars = ['SWIG_VERSION', 'SWIGDEPS']
def runnable_status(self):
for t in self.run_after:
if not t.hasrun:
return Task.ASK_LATER
if not getattr(self, 'init_outputs', None):
self.init_outputs = True
if not getattr(self, 'module', None):
# search the module name
txt = self.inputs[0].read()
m = re_module.search(txt)
if not m:
raise ValueError("could not find the swig module name")
self.module = m.group(1)
swig_c(self)
# add the language-specific output files as nodes
# call funs in the dict swig_langs
for x in self.env['SWIGFLAGS']:
# obtain the language
x = x[1:]
try:
fun = swig_langs[x]
except KeyError:
pass
else:
fun(self)
return super(swig, self).runnable_status()
def scan(self):
"scan for swig dependencies, climb the .i files"
lst_src = []
seen = []
missing = []
to_see = [self.inputs[0]]
while to_see:
node = to_see.pop(0)
if node in seen:
continue
seen.append(node)
lst_src.append(node)
# read the file
code = node.read()
code = c_preproc.re_nl.sub('', code)
code = c_preproc.re_cpp.sub(c_preproc.repl, code)
# find .i files and project headers
names = re_2.findall(code)
for n in names:
for d in self.generator.includes_nodes + [node.parent]:
u = d.find_resource(n)
if u:
to_see.append(u)
break
else:
missing.append(n)
return (lst_src, missing)
# provide additional language processing
swig_langs = {}
def swigf(fun):
swig_langs[fun.__name__.replace('swig_', '')] = fun
return fun
swig.swigf = swigf
def swig_c(self):
ext = '.swigwrap_%d.c' % self.generator.idx
flags = self.env['SWIGFLAGS']
if '-c++' in flags:
ext += 'xx'
out_node = self.inputs[0].parent.find_or_declare(self.module + ext)
if '-c++' in flags:
c_tsk = self.generator.cxx_hook(out_node)
else:
c_tsk = self.generator.c_hook(out_node)
c_tsk.set_run_after(self)
# transfer weights from swig task to c task
if getattr(self, 'weight', None):
c_tsk.weight = self.weight
if getattr(self, 'tree_weight', None):
c_tsk.tree_weight = self.tree_weight
try:
self.more_tasks.append(c_tsk)
except AttributeError:
self.more_tasks = [c_tsk]
try:
ltask = self.generator.link_task
except AttributeError:
pass
else:
ltask.set_run_after(c_tsk)
# setting input nodes does not declare the build order
# because the build already started, but it sets
# the dependency to enable rebuilds
ltask.inputs.append(c_tsk.outputs[0])
self.outputs.append(out_node)
if not '-o' in self.env['SWIGFLAGS']:
self.env.append_value('SWIGFLAGS', ['-o', self.outputs[0].abspath()])
@swigf
def swig_python(tsk):
node = tsk.inputs[0].parent
if tsk.outdir:
node = tsk.outdir
tsk.set_outputs(node.find_or_declare(tsk.module+'.py'))
@swigf
def swig_ocaml(tsk):
node = tsk.inputs[0].parent
if tsk.outdir:
node = tsk.outdir
tsk.set_outputs(node.find_or_declare(tsk.module+'.ml'))
tsk.set_outputs(node.find_or_declare(tsk.module+'.mli'))
@extension(*SWIG_EXTS)
def i_file(self, node):
# the task instance
tsk = self.create_task('swig')
tsk.set_inputs(node)
tsk.module = getattr(self, 'swig_module', None)
flags = self.to_list(getattr(self, 'swig_flags', []))
tsk.env.append_value('SWIGFLAGS', flags)
tsk.outdir = None
if '-outdir' in flags:
outdir = flags[flags.index('-outdir')+1]
outdir = tsk.generator.bld.bldnode.make_node(outdir)
outdir.mkdir()
tsk.outdir = outdir
@feature('c', 'cxx', 'd', 'fc', 'asm')
@after_method('apply_link', 'process_source')
def enforce_swig_before_link(self):
try:
link_task = self.link_task
except AttributeError:
pass
else:
for x in self.tasks:
if x.__class__.__name__ == 'swig':
link_task.run_after.add(x)
@conf
def check_swig_version(conf, minver=None):
"""
Check if the swig tool is found matching a given minimum version.
minver should be a tuple, eg. to check for swig >= 1.3.28 pass (1,3,28) as minver.
If successful, SWIG_VERSION is defined as 'MAJOR.MINOR'
(eg. '1.3') of the actual swig version found.
:param minver: minimum version
:type minver: tuple of int
:return: swig version
:rtype: tuple of int
"""
assert minver is None or isinstance(minver, tuple)
swigbin = conf.env['SWIG']
if not swigbin:
conf.fatal('could not find the swig executable')
# Get swig version string
cmd = swigbin + ['-version']
Logs.debug('swig: Running swig command %r', cmd)
reg_swig = re.compile(r'SWIG Version\s(.*)', re.M)
swig_out = conf.cmd_and_log(cmd)
swigver_tuple = tuple([int(s) for s in reg_swig.findall(swig_out)[0].split('.')])
# Compare swig version with the minimum required
result = (minver is None) or (swigver_tuple >= minver)
if result:
# Define useful environment variables
swigver = '.'.join([str(x) for x in swigver_tuple[:2]])
conf.env['SWIG_VERSION'] = swigver
# Feedback
swigver_full = '.'.join(map(str, swigver_tuple[:3]))
if minver is None:
conf.msg('Checking for swig version', swigver_full)
else:
minver_str = '.'.join(map(str, minver))
conf.msg('Checking for swig version >= %s' % (minver_str,), swigver_full, color=result and 'GREEN' or 'YELLOW')
if not result:
conf.fatal('The swig version is too old, expecting %r' % (minver,))
return swigver_tuple
def configure(conf):
conf.find_program('swig', var='SWIG')
conf.env.SWIGPATH_ST = '-I%s'
conf.env.SWIGDEF_ST = '-D%s'
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