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-rw-r--r--pugl/waflib/extras/cython.py147
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+#! /usr/bin/env python
+# encoding: utf-8
+# Thomas Nagy, 2010-2015
+
+import re
+from waflib import Task, Logs
+from waflib.TaskGen import extension
+
+cy_api_pat = re.compile(r'\s*?cdef\s*?(public|api)\w*')
+re_cyt = re.compile(r"""
+ ^\s* # must begin with some whitespace characters
+ (?:from\s+(\w+)(?:\.\w+)*\s+)? # optionally match "from foo(.baz)" and capture foo
+ c?import\s(\w+|[*]) # require "import bar" and capture bar
+ """, re.M | re.VERBOSE)
+
+@extension('.pyx')
+def add_cython_file(self, node):
+ """
+ Process a *.pyx* file given in the list of source files. No additional
+ feature is required::
+
+ def build(bld):
+ bld(features='c cshlib pyext', source='main.c foo.pyx', target='app')
+ """
+ ext = '.c'
+ if 'cxx' in self.features:
+ self.env.append_unique('CYTHONFLAGS', '--cplus')
+ ext = '.cc'
+
+ for x in getattr(self, 'cython_includes', []):
+ # TODO re-use these nodes in "scan" below
+ d = self.path.find_dir(x)
+ if d:
+ self.env.append_unique('CYTHONFLAGS', '-I%s' % d.abspath())
+
+ tsk = self.create_task('cython', node, node.change_ext(ext))
+ self.source += tsk.outputs
+
+class cython(Task.Task):
+ run_str = '${CYTHON} ${CYTHONFLAGS} -o ${TGT[0].abspath()} ${SRC}'
+ color = 'GREEN'
+
+ vars = ['INCLUDES']
+ """
+ Rebuild whenever the INCLUDES change. The variables such as CYTHONFLAGS will be appended
+ by the metaclass.
+ """
+
+ ext_out = ['.h']
+ """
+ The creation of a .h file is known only after the build has begun, so it is not
+ possible to compute a build order just by looking at the task inputs/outputs.
+ """
+
+ def runnable_status(self):
+ """
+ Perform a double-check to add the headers created by cython
+ to the output nodes. The scanner is executed only when the cython task
+ must be executed (optimization).
+ """
+ ret = super(cython, self).runnable_status()
+ if ret == Task.ASK_LATER:
+ return ret
+ for x in self.generator.bld.raw_deps[self.uid()]:
+ if x.startswith('header:'):
+ self.outputs.append(self.inputs[0].parent.find_or_declare(x.replace('header:', '')))
+ return super(cython, self).runnable_status()
+
+ def post_run(self):
+ for x in self.outputs:
+ if x.name.endswith('.h'):
+ if not x.exists():
+ if Logs.verbose:
+ Logs.warn('Expected %r', x.abspath())
+ x.write('')
+ return Task.Task.post_run(self)
+
+ def scan(self):
+ """
+ Return the dependent files (.pxd) by looking in the include folders.
+ Put the headers to generate in the custom list "bld.raw_deps".
+ To inspect the scanne results use::
+
+ $ waf clean build --zones=deps
+ """
+ node = self.inputs[0]
+ txt = node.read()
+
+ mods = set()
+ for m in re_cyt.finditer(txt):
+ if m.group(1): # matches "from foo import bar"
+ mods.add(m.group(1))
+ else:
+ mods.add(m.group(2))
+
+ Logs.debug('cython: mods %r', mods)
+ incs = getattr(self.generator, 'cython_includes', [])
+ incs = [self.generator.path.find_dir(x) for x in incs]
+ incs.append(node.parent)
+
+ found = []
+ missing = []
+ for x in sorted(mods):
+ for y in incs:
+ k = y.find_resource(x + '.pxd')
+ if k:
+ found.append(k)
+ break
+ else:
+ missing.append(x)
+
+ # the cython file implicitly depends on a pxd file that might be present
+ implicit = node.parent.find_resource(node.name[:-3] + 'pxd')
+ if implicit:
+ found.append(implicit)
+
+ Logs.debug('cython: found %r', found)
+
+ # Now the .h created - store them in bld.raw_deps for later use
+ has_api = False
+ has_public = False
+ for l in txt.splitlines():
+ if cy_api_pat.match(l):
+ if ' api ' in l:
+ has_api = True
+ if ' public ' in l:
+ has_public = True
+ name = node.name.replace('.pyx', '')
+ if has_api:
+ missing.append('header:%s_api.h' % name)
+ if has_public:
+ missing.append('header:%s.h' % name)
+
+ return (found, missing)
+
+def options(ctx):
+ ctx.add_option('--cython-flags', action='store', default='', help='space separated list of flags to pass to cython')
+
+def configure(ctx):
+ if not ctx.env.CC and not ctx.env.CXX:
+ ctx.fatal('Load a C/C++ compiler first')
+ if not ctx.env.PYTHON:
+ ctx.fatal('Load the python tool first!')
+ ctx.find_program('cython', var='CYTHON')
+ if hasattr(ctx.options, 'cython_flags'):
+ ctx.env.CYTHONFLAGS = ctx.options.cython_flags
+