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# Copyright 2016, Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import os
import os.path
import shutil
import sys
import tempfile
from distutils import errors
import commands
C_PYTHON_DEV = """
#include <Python.h>
int main(int argc, char **argv) { return 0; }
"""
C_PYTHON_DEV_ERROR_MESSAGE = """
Could not find <Python.h>. This could mean the following:
* You're on Ubuntu and haven't `apt-get install`ed `python-dev`.
* You're on Mac OS X and the usual Python framework was somehow corrupted
(check your environment variables or try re-installing?)
* You're on Windows and your Python installation was somehow corrupted
(check your environment variables or try re-installing?)
* Note: Windows users should look into installing `vcpython27`.
"""
C_CHECKS = {
C_PYTHON_DEV: C_PYTHON_DEV_ERROR_MESSAGE,
}
def _compile(compiler, source_string):
tempdir = tempfile.mkdtemp()
cpath = os.path.join(tempdir, 'a.c')
with open(cpath, 'w') as cfile:
cfile.write(source_string)
try:
compiler.compile([cpath])
except errors.CompileError as error:
return error
finally:
shutil.rmtree(tempdir)
def _expect_compile(compiler, source_string, error_message):
if _compile(compiler, source_string) is not None:
sys.stderr.write(error_message)
raise commands.CommandError(
"Diagnostics found a compilation environment issue:\n{}"
.format(error_message))
def diagnose_compile_error(build_ext, error):
"""Attempt to diagnose an error during compilation."""
for c_check, message in C_CHECKS.items():
_expect_compile(build_ext.compiler, c_check, message)
python_sources = [
source for source in build_ext.get_source_files()
if source.startswith('./src/python') and source.endswith('c')
]
for source in python_sources:
if not os.path.isfile(source):
raise commands.CommandError(
("Diagnostics found a missing Python extension source file:\n{}\n\n"
"This is usually because the Cython sources haven't been transpiled "
"into C yet and you're building from source.\n"
"Try setting the environment variable "
"`GRPC_PYTHON_BUILD_WITH_CYTHON=1` when invoking `setup.py` or "
"when using `pip`, e.g.:\n\n"
"pip install -rrequirements.txt\n"
"GRPC_PYTHON_BUILD_WITH_CYTHON=1 pip install .")
.format(source)
)
_ERROR_DIAGNOSES = {
errors.CompileError: diagnose_compile_error
}
def diagnose_build_ext_error(build_ext, error, formatted):
diagnostic = _ERROR_DIAGNOSES.get(type(error))
if diagnostic is None:
raise commands.CommandError(
"\n\nWe could not diagnose your build failure. Please file an issue at "
"http://www.github.com/grpc/grpc with `[Python install]` in the title."
"\n\n{}".format(formatted))
else:
diagnostic(build_ext, error)
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