1#!/usr/bin/env python2 2 3""" 4setup.py file for SWIG libfdt 5Copyright (C) 2017 Google, Inc. 6Written by Simon Glass <sjg@chromium.org> 7 8SPDX-License-Identifier: GPL-2.0+ BSD-2-Clause 9 10Files to be built into the extension are provided in SOURCES 11C flags to use are provided in CPPFLAGS 12Object file directory is provided in OBJDIR 13Version is provided in VERSION 14 15If these variables are not given they are parsed from the Makefiles. This 16allows this script to be run stand-alone, e.g.: 17 18 ./pylibfdt/setup.py install [--prefix=...] 19""" 20 21from distutils.core import setup, Extension 22import os 23import re 24import sys 25 26# Decodes a Makefile assignment line into key and value (and plus for +=) 27RE_KEY_VALUE = re.compile('(?P<key>\w+) *(?P<plus>[+])?= *(?P<value>.*)$') 28 29 30def ParseMakefile(fname): 31 """Parse a Makefile to obtain its variables. 32 33 This collects variable assigments of the form: 34 35 VAR = value 36 VAR += more 37 38 It does not pick out := assignments, as these are not needed here. It does 39 handle line continuation. 40 41 Returns a dict: 42 key: Variable name (e.g. 'VAR') 43 value: Variable value (e.g. 'value more') 44 """ 45 makevars = {} 46 with open(fname) as fd: 47 prev_text = '' # Continuation text from previous line(s) 48 for line in fd.read().splitlines(): 49 if line and line[-1] == '\\': # Deal with line continuation 50 prev_text += line[:-1] 51 continue 52 elif prev_text: 53 line = prev_text + line 54 prev_text = '' # Continuation is now used up 55 m = RE_KEY_VALUE.match(line) 56 if m: 57 value = m.group('value') or '' 58 key = m.group('key') 59 60 # Appending to a variable inserts a space beforehand 61 if 'plus' in m.groupdict() and key in makevars: 62 makevars[key] += ' ' + value 63 else: 64 makevars[key] = value 65 return makevars 66 67def GetEnvFromMakefiles(): 68 """Scan the Makefiles to obtain the settings we need. 69 70 This assumes that this script is being run from the top-level directory, 71 not the pylibfdt directory. 72 73 Returns: 74 Tuple with: 75 List of swig options 76 Version string 77 List of files to build 78 List of extra C preprocessor flags needed 79 Object directory to use (always '') 80 """ 81 basedir = os.path.dirname(os.path.dirname(os.path.abspath(sys.argv[0]))) 82 swig_opts = ['-I%s' % basedir] 83 makevars = ParseMakefile(os.path.join(basedir, 'Makefile')) 84 version = '%s.%s.%s' % (makevars['VERSION'], makevars['PATCHLEVEL'], 85 makevars['SUBLEVEL']) 86 makevars = ParseMakefile(os.path.join(basedir, 'libfdt', 'Makefile.libfdt')) 87 files = makevars['LIBFDT_SRCS'].split() 88 files = [os.path.join(basedir, 'libfdt', fname) for fname in files] 89 files.append('pylibfdt/libfdt.i') 90 cflags = ['-I%s' % basedir, '-I%s/libfdt' % basedir] 91 objdir = '' 92 return swig_opts, version, files, cflags, objdir 93 94 95progname = sys.argv[0] 96files = os.environ.get('SOURCES', '').split() 97cflags = os.environ.get('CPPFLAGS', '').split() 98objdir = os.environ.get('OBJDIR') 99version = os.environ.get('VERSION') 100swig_opts = os.environ.get('SWIG_OPTS', '').split() 101 102# If we were called directly rather than through our Makefile (which is often 103# the case with Python module installation), read the settings from the 104# Makefile. 105if not all((swig_opts, version, files, cflags, objdir)): 106 swig_opts, version, files, cflags, objdir = GetEnvFromMakefiles() 107 108libfdt_module = Extension( 109 '_libfdt', 110 sources = files, 111 extra_compile_args = cflags, 112 swig_opts = swig_opts, 113) 114 115setup( 116 name='libfdt', 117 version= version, 118 author='Simon Glass <sjg@chromium.org>', 119 description='Python binding for libfdt', 120 ext_modules=[libfdt_module], 121 package_dir={'': objdir}, 122 py_modules=['pylibfdt/libfdt'], 123) 124