import configparser

from distutils import ccompiler, sysconfig

from distutils.core import Extension

import functools

import hashlib

from io import BytesIO

import logging

import os

from pathlib import Path

import platform

import shlex

import shutil

import subprocess

import sys

import tarfile

import textwrap

import urllib.request

import versioneer

_log = logging.getLogger(__name__)

def _get_xdg_cache_dir():

"""

Return the XDG cache directory.

See https://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html

"""

cache_dir = os.environ.get('XDG_CACHE_HOME')

if not cache_dir:

cache_dir = os.path.expanduser('~/.cache')

if cache_dir.startswith('~/'): # Expansion failed.

return None

return Path(cache_dir, 'matplotlib')

def _get_hash(data):

"""Compute the sha256 hash of *data*."""

hasher = hashlib.sha256()

hasher.update(data)

return hasher.hexdigest()

@functools.lru_cache()

def _get_ssl_context():

import certifi

import ssl

return ssl.create_default_context(cafile=certifi.where())

def get_from_cache_or_download(url, sha):

"""

Get bytes from the given url or local cache.

Parameters

----------

url : str

The url to download.

sha : str

The sha256 of the file.

Returns

-------

BytesIO

The file loaded into memory.

"""

cache_dir = _get_xdg_cache_dir()

if cache_dir is not None: # Try to read from cache.

try:

data = (cache_dir / sha).read_bytes()

except IOError:

pass

else:

if _get_hash(data) == sha:

return BytesIO(data)

# jQueryUI's website blocks direct downloads from urllib.request's

# default User-Agent, but not (for example) wget; so I don't feel too

# bad passing in an empty User-Agent.

with urllib.request.urlopen(

urllib.request.Request(url, headers={"User-Agent": ""}),

context=_get_ssl_context()) as req:

data = req.read()

file_sha = _get_hash(data)

if file_sha != sha:

raise Exception(

f"The downloaded file does not match the expected sha. {url} was "

f"expected to have {sha} but it had {file_sha}")

if cache_dir is not None: # Try to cache the downloaded file.

try:

cache_dir.mkdir(parents=True, exist_ok=True)

with open(cache_dir / sha, "xb") as fout:

fout.write(data)

except IOError:

pass

return BytesIO(data)

def get_and_extract_tarball(urls, sha, dirname):

"""

Obtain a tarball (from cache or download) and extract it.

Parameters

----------

urls : list[str]

URLs from which download is attempted (in order of attempt), if the

tarball is not in the cache yet.

sha : str

SHA256 hash of the tarball; used both as a cache key (by

`get_from_cache_or_download`) and to validate a downloaded tarball.

dirname : path-like

Directory where the tarball is extracted.

"""

toplevel = Path("build", dirname)

if not toplevel.exists(): # Download it or load it from cache.

Path("build").mkdir(exist_ok=True)

for url in urls:

try:

tar_contents = get_from_cache_or_download(url, sha)

break

except Exception:

pass

else:

raise IOError(

f"Failed to download any of the following: {urls}. "

f"Please download one of these urls and extract it into "

f"'build/' at the top-level of the source repository.")

print("Extracting {}".format(urllib.parse.urlparse(url).path))

with tarfile.open(fileobj=tar_contents, mode="r:gz") as tgz:

if os.path.commonpath(tgz.getnames()) != dirname:

raise IOError(

f"The downloaded tgz file was expected to have {dirname} "

f"as sole top-level directory, but that is not the case")

tgz.extractall("build")

return toplevel

# SHA256 hashes of the FreeType tarballs

_freetype_hashes = {

'2.6.1':

'0a3c7dfbda6da1e8fce29232e8e96d987ababbbf71ebc8c75659e4132c367014',

'2.6.2':

'8da42fc4904e600be4b692555ae1dcbf532897da9c5b9fb5ebd3758c77e5c2d4',

'2.6.3':

'7942096c40ee6fea882bd4207667ad3f24bff568b96b10fd3885e11a7baad9a3',

'2.6.4':

'27f0e38347a1850ad57f84fc4dfed68ba0bc30c96a6fa6138ef84d485dd9a8d7',

'2.6.5':

'3bb24add9b9ec53636a63ea8e867ed978c4f8fdd8f1fa5ccfd41171163d4249a',

'2.7':

'7b657d5f872b0ab56461f3bd310bd1c5ec64619bd15f0d8e08282d494d9cfea4',

'2.7.1':

'162ef25aa64480b1189cdb261228e6c5c44f212aac4b4621e28cf2157efb59f5',

'2.8':

'33a28fabac471891d0523033e99c0005b95e5618dc8ffa7fa47f9dadcacb1c9b',

'2.8.1':

'876711d064a6a1bd74beb18dd37f219af26100f72daaebd2d86cb493d7cd7ec6',

'2.9':

'bf380e4d7c4f3b5b1c1a7b2bf3abb967bda5e9ab480d0df656e0e08c5019c5e6',

'2.9.1':

'ec391504e55498adceb30baceebd147a6e963f636eb617424bcfc47a169898ce',

'2.10.0':

'955e17244e9b38adb0c98df66abb50467312e6bb70eac07e49ce6bd1a20e809a',

'2.10.1':

'3a60d391fd579440561bf0e7f31af2222bc610ad6ce4d9d7bd2165bca8669110',

}

# This is the version of FreeType to use when building a local

# version. It must match the value in

# lib/matplotlib.__init__.py and also needs to be changed below in the

# embedded windows build script (grep for "REMINDER" in this file)

LOCAL_FREETYPE_VERSION = '2.6.1'

LOCAL_FREETYPE_HASH = _freetype_hashes.get(LOCAL_FREETYPE_VERSION, 'unknown')

LOCAL_QHULL_VERSION = '2020.2'

# matplotlib build options, which can be altered using setup.cfg

setup_cfg = os.environ.get('MPLSETUPCFG', 'setup.cfg')

config = configparser.ConfigParser()

if os.path.exists(setup_cfg):

config.read(setup_cfg)

options = {

'backend': config.get('rc_options', 'backend', fallback=None),

'system_freetype': config.getboolean(

'libs', 'system_freetype', fallback=sys.platform.startswith('aix')),

'system_qhull': config.getboolean('libs', 'system_qhull',

fallback=False),

}

if '-q' in sys.argv or '--quiet' in sys.argv:

def print_raw(*args, **kwargs): pass # Suppress our own output.

else:

print_raw = print

def print_status(package, status):

initial_indent = "%12s: " % package

indent = ' ' * 18

print_raw(textwrap.fill(str(status), width=80,

initial_indent=initial_indent,

subsequent_indent=indent))

@functools.lru_cache(1) # We only need to compute this once.

def get_pkg_config():

"""

Get path to pkg-config and set up the PKG_CONFIG environment variable.

"""

if sys.platform == 'win32':

return None

pkg_config = os.environ.get('PKG_CONFIG', 'pkg-config')

if shutil.which(pkg_config) is None:

print(

"IMPORTANT WARNING:\n"

" pkg-config is not installed.\n"

" Matplotlib may not be able to find some of its dependencies.")

return None

pkg_config_path = sysconfig.get_config_var('LIBDIR')

if pkg_config_path is not None:

pkg_config_path = os.path.join(pkg_config_path, 'pkgconfig')

try:

os.environ['PKG_CONFIG_PATH'] += ':' + pkg_config_path

except KeyError:

os.environ['PKG_CONFIG_PATH'] = pkg_config_path

return pkg_config

def pkg_config_setup_extension(

ext, package,

atleast_version=None, alt_exec=None, default_libraries=()):

"""Add parameters to the given *ext* for the given *package*."""

# First, try to get the flags from pkg-config.

pkg_config = get_pkg_config()

cmd = [pkg_config, package] if pkg_config else alt_exec

if cmd is not None:

try:

if pkg_config and atleast_version:

subprocess.check_call(

[*cmd, f"--atleast-version={atleast_version}"])

# Use sys.getfilesystemencoding() to allow round-tripping

# when passed back to later subprocess calls; do not use

# locale.getpreferredencoding() which universal_newlines=True

# would do.

cflags = shlex.split(

os.fsdecode(subprocess.check_output([*cmd, "--cflags"])))

libs = shlex.split(

os.fsdecode(subprocess.check_output([*cmd, "--libs"])))

except (OSError, subprocess.CalledProcessError):

pass

else:

ext.extra_compile_args.extend(cflags)

ext.extra_link_args.extend(libs)

return

# If that fails, fall back on the defaults.

# conda Windows header and library paths.

# https://github.com/conda/conda/issues/2312 re: getting the env dir.

if sys.platform == 'win32':

conda_env_path = (os.getenv('CONDA_PREFIX') # conda >= 4.1

or os.getenv('CONDA_DEFAULT_ENV')) # conda < 4.1

if conda_env_path and os.path.isdir(conda_env_path):

conda_env_path = Path(conda_env_path)

ext.include_dirs.append(str(conda_env_path / "Library/include"))

ext.library_dirs.append(str(conda_env_path / "Library/lib"))

# Default linked libs.

ext.libraries.extend(default_libraries)

class Skipped(Exception):

"""

Exception thrown by `SetupPackage.check` to indicate that a package should

be skipped.

"""

class SetupPackage:

def check(self):

"""

If the package should be installed, return an informative string, or

None if no information should be displayed at all.

If the package should be skipped, raise a `Skipped` exception.

If a missing build dependency is fatal, call `sys.exit`.

"""

def get_package_data(self):

"""

Get a package data dictionary to add to the configuration.

These are merged into to the *package_data* list passed to

`setuptools.setup`.

"""

return {}

def get_extensions(self):

"""

Return or yield a list of C extensions (`distutils.core.Extension`

objects) to add to the configuration. These are added to the

*extensions* list passed to `setuptools.setup`.

"""

return []

def do_custom_build(self, env):

"""

If a package needs to do extra custom things, such as building a

third-party library, before building an extension, it should

override this method.

"""

class OptionalPackage(SetupPackage):

config_category = "packages"

default_config = True

def check(self):

"""

Check whether ``setup.cfg`` requests this package to be installed.

May be overridden by subclasses for additional checks.

"""

if config.getboolean(self.config_category, self.name,

fallback=self.default_config):

return "installing"

else: # Configuration opt-out by user

raise Skipped("skipping due to configuration")

class Platform(SetupPackage):

name = "platform"

def check(self):

return sys.platform

class Python(SetupPackage):

name = "python"

def check(self):

return sys.version

def _pkg_data_helper(pkg, subdir):

"""Glob "lib/$pkg/$subdir/**/*", returning paths relative to "lib/$pkg"."""

base = Path("lib", pkg)

return [str(path.relative_to(base)) for path in (base / subdir).rglob("*")]

class Matplotlib(SetupPackage):

name = "matplotlib"

def check(self):

return versioneer.get_version()

def get_package_data(self):

return {

'matplotlib': [

'mpl-data/matplotlibrc',

*_pkg_data_helper('matplotlib', 'mpl-data'),

*_pkg_data_helper('matplotlib', 'backends/web_backend'),

'*.dll', # Only actually matters on Windows.

],

}

def get_extensions(self):

# agg

ext = Extension(

"matplotlib.backends._backend_agg", [

"src/mplutils.cpp",

"src/py_converters.cpp",

"src/_backend_agg.cpp",

"src/_backend_agg_wrapper.cpp",

])

add_numpy_flags(ext)

add_libagg_flags_and_sources(ext)

FreeType.add_flags(ext)

yield ext

# c_internal_utils

ext = Extension(

"matplotlib._c_internal_utils", ["src/_c_internal_utils.c"],

libraries=({

"linux": ["dl"],

"win32": ["ole32", "shell32", "user32"],

}.get(sys.platform, [])))

yield ext

# contour

ext = Extension(

"matplotlib._contour", [

"src/_contour.cpp",

"src/_contour_wrapper.cpp",

"src/py_converters.cpp",

])

add_numpy_flags(ext)

add_libagg_flags(ext)

yield ext

# ft2font

ext = Extension(

"matplotlib.ft2font", [

"src/ft2font.cpp",

"src/ft2font_wrapper.cpp",

"src/mplutils.cpp",

"src/py_converters.cpp",

])

FreeType.add_flags(ext)

add_numpy_flags(ext)

add_libagg_flags(ext)

yield ext

# image

ext = Extension(

"matplotlib._image", [

"src/_image.cpp",

"src/mplutils.cpp",

"src/_image_wrapper.cpp",

"src/py_converters.cpp",

])

add_numpy_flags(ext)

add_libagg_flags_and_sources(ext)

yield ext

# path

ext = Extension(

"matplotlib._path", [

"src/py_converters.cpp",

"src/_path_wrapper.cpp",

])

add_numpy_flags(ext)

add_libagg_flags_and_sources(ext)

yield ext

# qhull

ext = Extension(

"matplotlib._qhull", ["src/qhull_wrap.c"],

define_macros=[("MPL_DEVNULL", os.devnull)])

add_numpy_flags(ext)

Qhull.add_flags(ext)

yield ext

# tkagg

ext = Extension(

"matplotlib.backends._tkagg", [

"src/_tkagg.cpp",

],

include_dirs=["src"],

# psapi library needed for finding Tcl/Tk at run time.

libraries=({"linux": ["dl"], "win32": ["psapi"],

"cygwin": ["psapi"]}.get(sys.platform, [])),

extra_link_args={"win32": ["-mwindows"]}.get(sys.platform, []))

add_numpy_flags(ext)

add_libagg_flags(ext)

yield ext

# tri

ext = Extension(

"matplotlib._tri", [

"src/tri/_tri.cpp",

"src/tri/_tri_wrapper.cpp",

"src/mplutils.cpp",

])

add_numpy_flags(ext)

yield ext

# ttconv

ext = Extension(

"matplotlib._ttconv", [

"src/_ttconv.cpp",

"extern/ttconv/pprdrv_tt.cpp",

"extern/ttconv/pprdrv_tt2.cpp",

"extern/ttconv/ttutil.cpp",

],

include_dirs=["extern"])

add_numpy_flags(ext)

yield ext

class Tests(OptionalPackage):

name = "tests"

default_config = False

def get_package_data(self):

return {

'matplotlib': [

*_pkg_data_helper('matplotlib', 'tests/baseline_images'),

*_pkg_data_helper('matplotlib', 'tests/tinypages'),

'tests/cmr10.pfb',

'tests/mpltest.ttf',

],

'mpl_toolkits': [

*_pkg_data_helper('mpl_toolkits', 'tests/baseline_images'),

]

}

def add_numpy_flags(ext):

import numpy as np

ext.include_dirs.append(np.get_include())

ext.define_macros.extend([

# Ensure that PY_ARRAY_UNIQUE_SYMBOL is uniquely defined for each

# extension.

('PY_ARRAY_UNIQUE_SYMBOL',

'MPL_' + ext.name.replace('.', '_') + '_ARRAY_API'),

('NPY_NO_DEPRECATED_API', 'NPY_1_7_API_VERSION'),

# Allow NumPy's printf format specifiers in C++.

('__STDC_FORMAT_MACROS', 1),

])

def add_libagg_flags(ext):

# We need a patched Agg not available elsewhere, so always use the vendored

# version.

ext.include_dirs.insert(0, "extern/agg24-svn/include")

def add_libagg_flags_and_sources(ext):

# We need a patched Agg not available elsewhere, so always use the vendored

# version.

ext.include_dirs.insert(0, "extern/agg24-svn/include")

agg_sources = [

"agg_bezier_arc.cpp",

"agg_curves.cpp",

"agg_image_filters.cpp",

"agg_trans_affine.cpp",

"agg_vcgen_contour.cpp",

"agg_vcgen_dash.cpp",

"agg_vcgen_stroke.cpp",

"agg_vpgen_segmentator.cpp",

]

ext.sources.extend(

os.path.join("extern", "agg24-svn", "src", x) for x in agg_sources)

# First compile checkdep_freetype2.c, which aborts the compilation either

# with "foo.h: No such file or directory" if the header is not found, or an

# appropriate error message if the header indicates a too-old version.

class FreeType(SetupPackage):

name = "freetype"

@classmethod

def add_flags(cls, ext):

ext.sources.insert(0, 'src/checkdep_freetype2.c')

if options.get('system_freetype'):

pkg_config_setup_extension(

# FreeType 2.3 has libtool version 9.11.3 as can be checked

# from the tarball. For FreeType>=2.4, there is a conversion

# table in docs/VERSIONS.txt in the FreeType source tree.

ext, 'freetype2',

atleast_version='9.11.3',

alt_exec=['freetype-config'],

default_libraries=['freetype'])

ext.define_macros.append(('FREETYPE_BUILD_TYPE', 'system'))

else:

src_path = Path('build', f'freetype-{LOCAL_FREETYPE_VERSION}')

# Statically link to the locally-built freetype.

# This is certainly broken on Windows.

ext.include_dirs.insert(0, str(src_path / 'include'))

if sys.platform == 'win32':

libfreetype = 'libfreetype.lib'

else:

libfreetype = 'libfreetype.a'

ext.extra_objects.insert(

0, str(src_path / 'objs' / '.libs' / libfreetype))

ext.define_macros.append(('FREETYPE_BUILD_TYPE', 'local'))

def do_custom_build(self, env):

# We're using a system freetype

if options.get('system_freetype'):

return

tarball = f'freetype-{LOCAL_FREETYPE_VERSION}.tar.gz'

src_path = get_and_extract_tarball(

urls=[

(f'https://downloads.sourceforge.net/project/freetype'

f'/freetype2/{LOCAL_FREETYPE_VERSION}/{tarball}'),

(f'https://download.savannah.gnu.org/releases/freetype'

f'/{tarball}')

],

sha=LOCAL_FREETYPE_HASH,

dirname=f'freetype-{LOCAL_FREETYPE_VERSION}',

)

if sys.platform == 'win32':

libfreetype = 'libfreetype.lib'

else:

libfreetype = 'libfreetype.a'

if (src_path / 'objs' / '.libs' / libfreetype).is_file():

return # Bail out because we have already built FreeType.

print(f"Building freetype in {src_path}")

if sys.platform != 'win32': # compilation on non-windows

env = {**env, "CFLAGS": "{} -fPIC".format(env.get("CFLAGS", ""))}

subprocess.check_call(

["./configure", "--with-zlib=no", "--with-bzip2=no",

"--with-png=no", "--with-harfbuzz=no", "--enable-static",

"--disable-shared"],

env=env, cwd=src_path)

if 'GNUMAKE' in env:

make = env['GNUMAKE']

elif 'MAKE' in env:

make = env['MAKE']

else:

try:

output = subprocess.check_output(['make', '-v'],

stderr=subprocess.DEVNULL)

except subprocess.CalledProcessError:

output = b''

if b'GNU' not in output and b'makepp' not in output:

make = 'gmake'

else:

make = 'make'

subprocess.check_call([make], env=env, cwd=src_path)

else: # compilation on windows

shutil.rmtree(src_path / "objs", ignore_errors=True)

msbuild_platform = (

'x64' if platform.architecture()[0] == '64bit' else 'Win32')

base_path = Path("build/freetype-2.6.1/builds/windows")

vc = 'vc2010'

sln_path = (

base_path / vc / "freetype.sln"

)

# https://developercommunity.visualstudio.com/comments/190992/view.html

(sln_path.parent / "Directory.Build.props").write_text("""

<Project>

<PropertyGroup>

<!-- The following line *cannot* be split over multiple lines. -->

<WindowsTargetPlatformVersion>$([Microsoft.Build.Utilities.ToolLocationHelper]::GetLatestSDKTargetPlatformVersion('Windows', '10.0'))</WindowsTargetPlatformVersion>

</PropertyGroup>

</Project>

""")

# It is not a trivial task to determine PlatformToolset to plug it

# into msbuild command, and Directory.Build.props will not override

# the value in the project file.

# The DefaultPlatformToolset is from Microsoft.Cpp.Default.props

with open(base_path / vc / "freetype.vcxproj", 'r+b') as f:

toolset_repl = b'PlatformToolset>$(DefaultPlatformToolset)<'

vcxproj = f.read().replace(b'PlatformToolset>v100<',

toolset_repl)

assert toolset_repl in vcxproj, (

'Upgrading Freetype might break this')

f.seek(0)

f.truncate()

f.write(vcxproj)

cc = ccompiler.new_compiler()

cc.initialize() # Get msbuild in the %PATH% of cc.spawn.

cc.spawn(["msbuild", str(sln_path),

"/t:Clean;Build",

f"/p:Configuration=Release;Platform={msbuild_platform}"])

# Move to the corresponding Unix build path.

(src_path / "objs" / ".libs").mkdir()

# Be robust against change of FreeType version.

lib_path, = (src_path / "objs" / vc / msbuild_platform).glob(

"freetype*.lib")

shutil.copy2(lib_path, src_path / "objs/.libs/libfreetype.lib")

class Qhull(SetupPackage):

name = "qhull"

_extensions_to_update = []

@classmethod

def add_flags(cls, ext):

if options.get("system_qhull"):

ext.libraries.append("qhull_r")

else:

cls._extensions_to_update.append(ext)

def do_custom_build(self, env):

if options.get('system_qhull'):

return

toplevel = get_and_extract_tarball(

urls=["http://www.qhull.org/download/qhull-2020-src-8.0.2.tgz"],

sha="b5c2d7eb833278881b952c8a52d20179eab87766b00b865000469a45c1838b7e",

dirname=f"qhull-{LOCAL_QHULL_VERSION}",

)

shutil.copyfile(toplevel / "COPYING.txt", "LICENSE/LICENSE_QHULL")

for ext in self._extensions_to_update:

qhull_path = Path(f'build/qhull-{LOCAL_QHULL_VERSION}/src')

ext.include_dirs.insert(0, str(qhull_path))

ext.sources.extend(map(str, sorted(qhull_path.glob('libqhull_r/*.c'))))

if sysconfig.get_config_var("LIBM") == "-lm":

ext.libraries.extend("m")

class BackendMacOSX(OptionalPackage):

config_category = 'gui_support'

name = 'macosx'

def check(self):

if sys.platform != 'darwin':

raise Skipped("Mac OS-X only")

return super().check()

def get_extensions(self):

sources = [

'src/_macosx.m'

]

ext = Extension('matplotlib.backends._macosx', sources)

ext.extra_compile_args.extend(['-Werror=unguarded-availability'])

ext.extra_link_args.extend(['-framework', 'Cocoa'])

if platform.python_implementation().lower() == 'pypy':

ext.extra_compile_args.append('-DPYPY=1')

yield ext