"""
This module provides an interface for invoking CMake executable.
"""
from __future__ import annotations
import argparse
import configparser
import contextlib
import glob
import itertools
import os
import os.path
import platform
import re
import shlex
import subprocess
import sys
import sysconfig
import textwrap
from pathlib import Path
from shlex import quote
from typing import Mapping, Sequence, overload
import distutils.sysconfig as du_sysconfig
from .constants import (
CMAKE_BUILD_DIR,
CMAKE_DEFAULT_EXECUTABLE,
CMAKE_INSTALL_DIR,
SETUPTOOLS_INSTALL_DIR,
)
from .exceptions import SKBuildError
from .platform_specifics import get_platform
RE_FILE_INSTALL = re.compile(r"""[ \t]*file\(INSTALL DESTINATION "([^"]+)".*"([^"]+)"\).*""")
@overload
def pop_arg(arg: str, args: Sequence[str], default: None = None) -> tuple[list[str], str | None]:
...
@overload
def pop_arg(arg: str, args: Sequence[str], default: str) -> tuple[list[str], str]:
...
[docs]
def pop_arg(arg: str, args: Sequence[str], default: str | None = None) -> tuple[list[str], str | None]:
"""Pops an argument ``arg`` from an argument list ``args`` and returns the
new list and the value of the argument if present and a default otherwise.
"""
parser = argparse.ArgumentParser(add_help=False)
parser.add_argument(arg)
namespace_names, args = parser.parse_known_args(args)
namespace = tuple(vars(namespace_names).items())
val = namespace[0][1] if namespace and namespace[0][1] is not None else default
return args, val
def _remove_cwd_prefix(path: str) -> str:
cwd = os.getcwd()
result = path.replace("/", os.sep)
if result.startswith(cwd):
result = os.path.relpath(result, cwd)
if platform.system() == "Windows":
result = result.replace("\\\\", os.sep)
return result.replace("\n", "")
[docs]
def has_cmake_cache_arg(cmake_args: list[str], arg_name: str, arg_value: str | None = None) -> bool:
"""Return True if ``-D<arg_name>:TYPE=<arg_value>`` is found
in ``cmake_args``. If ``arg_value`` is None, return True only if
``-D<arg_name>:`` is found in the list."""
for arg in reversed(cmake_args):
if arg.startswith(f"-D{arg_name}:"):
if arg_value is None:
return True
if "=" in arg:
return arg.split("=")[1] == arg_value
return False
[docs]
def get_cmake_version(cmake_executable: str = CMAKE_DEFAULT_EXECUTABLE) -> str:
"""
Runs CMake and extracts associated version information.
Raises :class:`skbuild.exceptions.SKBuildError` if it failed to execute CMake.
Example:
>>> # xdoc: IGNORE_WANT
>>> from skbuild.cmaker import get_cmake_version
>>> print(get_cmake_version())
3.14.4
"""
try:
version_string_bytes = subprocess.run(
[cmake_executable, "--version"], check=True, stdout=subprocess.PIPE
).stdout
except (OSError, subprocess.CalledProcessError) as err:
msg = f"Problem with the CMake installation, aborting build. CMake executable is {cmake_executable}"
raise SKBuildError(msg) from err
version_string = version_string_bytes.decode()
return version_string.splitlines()[0].split(" ")[-1]
[docs]
class CMaker:
r"""Interface to CMake executable.
Example:
>>> # Setup dummy repo
>>> from skbuild.cmaker import CMaker
>>> import ubelt as ub
>>> from os.path import join
>>> repo_dpath = ub.ensure_app_cache_dir('skbuild', 'test_cmaker')
>>> ub.delete(repo_dpath)
>>> src_dpath = ub.ensuredir(join(repo_dpath, 'SRC'))
>>> cmake_fpath = join(src_dpath, 'CMakeLists.txt')
>>> open(cmake_fpath, 'w').write(ub.codeblock(
'''
cmake_minimum_required(VERSION 3.5.0)
project(foobar NONE)
file(WRITE "${CMAKE_BINARY_DIR}/foo.txt" "# foo")
install(FILES "${CMAKE_BINARY_DIR}/foo.txt" DESTINATION ".")
install(CODE "message(STATUS \\"Project has been installed\\")")
message(STATUS "CMAKE_SOURCE_DIR:${CMAKE_SOURCE_DIR}")
message(STATUS "CMAKE_BINARY_DIR:${CMAKE_BINARY_DIR}")
'''
>>> ))
>>> # create a cmaker instance in the dummy repo, configure, and make.
>>> from skbuild.utils import push_dir
>>> with push_dir(repo_dpath):
>>> cmkr = CMaker()
>>> config_kwargs = {'cmake_source_dir': str(src_dpath)}
>>> print('--- test cmaker configure ---')
>>> env = cmkr.configure(**config_kwargs)
>>> print('--- test cmaker make ---')
>>> cmkr.make(env=env)
"""
def __init__(self, cmake_executable: str = CMAKE_DEFAULT_EXECUTABLE) -> None:
self.cmake_executable = cmake_executable
self.cmake_version = get_cmake_version(self.cmake_executable)
self.platform = get_platform()
[docs]
@staticmethod
def get_cached(variable_name: str) -> str | None:
"""If set, returns the variable cached value from the :func:`skbuild.constants.CMAKE_BUILD_DIR()`, otherwise returns None"""
variable_name = f"{variable_name}:"
cmake_cache = Path(CMAKE_BUILD_DIR()) / "CMakeCache.txt"
with contextlib.suppress(OSError):
for line in cmake_cache.read_text("utf8").splitlines():
if line.startswith(variable_name):
return line.split("=", 1)[-1].strip()
return None
[docs]
@classmethod
def get_cached_generator_name(cls) -> str | None:
"""Reads and returns the cached generator from the :func:`skbuild.constants.CMAKE_BUILD_DIR()`:.
Returns None if not found.
"""
return cls.get_cached("CMAKE_GENERATOR")
[docs]
def get_cached_generator_env(self) -> dict[str, str] | None:
"""If any, return a mapping of environment associated with the cached generator."""
generator_name = self.get_cached_generator_name()
if generator_name is not None:
return self.platform.get_generator(generator_name).env
return None
[docs]
@staticmethod
def get_python_version() -> str:
"""Get version associated with the current python interpreter.
Returns:
str: python version string
Example:
>>> # xdoc: +IGNORE_WANT
>>> from skbuild.cmaker import CMaker
>>> python_version = CMaker.get_python_version()
>>> print('python_version = {!r}'.format(python_version))
python_version = '3.7'
"""
python_version = sysconfig.get_config_var("VERSION")
if not python_version:
python_version = sysconfig.get_config_var("py_version_short")
if not python_version:
python_version = ".".join(map(str, sys.version_info[:2]))
assert isinstance(python_version, str)
return python_version
# NOTE(opadron): The try-excepts raise the cyclomatic complexity, but we
# need them for this function.
[docs]
@staticmethod
def get_python_include_dir(python_version: str) -> str | None:
"""Get include directory associated with the current python
interpreter.
Args:
python_version (str): python version, may be partial.
Returns:
PathLike: python include dir
Example:
>>> # xdoc: +IGNORE_WANT
>>> from skbuild.cmaker import CMaker
>>> python_version = CMaker.get_python_version()
>>> python_include_dir = CMaker.get_python_include_dir(python_version)
>>> print('python_include_dir = {!r}'.format(python_include_dir))
python_include_dir = '.../conda/envs/py37/include/python3.7m'
"""
# determine python include dir
python_include_dir: str | None = sysconfig.get_config_var("INCLUDEPY")
# if Python.h not found (or python_include_dir is None), try to find a
# suitable include dir
found_python_h = python_include_dir is not None and os.path.exists(os.path.join(python_include_dir, "Python.h"))
if not found_python_h:
# NOTE(opadron): these possible prefixes must be guarded against
# AttributeErrors and KeyErrors because they each can throw on
# different platforms or even different builds on the same platform.
include_py: str | None = sysconfig.get_config_var("INCLUDEPY")
include_dir: str | None = sysconfig.get_config_var("INCLUDEDIR")
include: str | None = None
plat_include: str | None = None
python_inc: str | None = None
python_inc2: str | None = None
with contextlib.suppress(AttributeError, KeyError):
include = sysconfig.get_path("include")
with contextlib.suppress(AttributeError, KeyError):
plat_include = sysconfig.get_path("platinclude")
with contextlib.suppress(AttributeError):
python_inc = sysconfig.get_python_inc() # type: ignore[attr-defined]
if include_py is not None:
include_py = os.path.dirname(include_py)
if include is not None:
include = os.path.dirname(include)
if plat_include is not None:
plat_include = os.path.dirname(plat_include)
if python_inc is not None:
python_inc2 = os.path.join(python_inc, ".".join(map(str, sys.version_info[:2])))
all_candidate_prefixes = [include_py, include_dir, include, plat_include, python_inc, python_inc2]
candidate_prefixes: list[str] = [pre for pre in all_candidate_prefixes if pre]
candidate_versions: tuple[str, ...] = (python_version,)
if python_version:
candidate_versions += ("",)
pymalloc = None
with contextlib.suppress(AttributeError):
pymalloc = bool(sysconfig.get_config_var("WITH_PYMALLOC"))
if pymalloc:
candidate_versions += (python_version + "m",)
candidates = (
os.path.join(prefix, "".join(("python", ver)))
for (prefix, ver) in itertools.product(candidate_prefixes, candidate_versions)
)
for candidate in candidates:
if os.path.exists(os.path.join(candidate, "Python.h")):
# we found an include directory
python_include_dir = candidate
break
# TODO(opadron): what happens if we don't find an include directory?
# Throw SKBuildError?
return python_include_dir
[docs]
@staticmethod
def get_python_library(python_version: str) -> str | None:
"""Get path to the python library associated with the current python
interpreter.
Args:
python_version (str): python version, may be partial.
Returns:
PathLike: python_library : python shared library
Example:
>>> # xdoc: +IGNORE_WANT
>>> from skbuild.cmaker import CMaker
>>> python_version = CMaker.get_python_version()
>>> python_library = CMaker.get_python_include_dir(python_version)
>>> print('python_library = {!r}'.format(python_library))
python_library = '.../conda/envs/py37/include/python3.7m'
"""
# On Windows, support cross-compiling in the same way as setuptools
# When cross-compiling, check DIST_EXTRA_CONFIG first
config_file = os.environ.get("DIST_EXTRA_CONFIG", None)
if config_file and Path(config_file).is_file():
cp = configparser.ConfigParser()
cp.read(config_file)
result = cp.get("build_ext", "library_dirs", fallback="")
if result:
minor = sys.version_info[1]
return str(Path(result) / f"python3{minor}.lib")
# This seems to be the simplest way to detect the library path with
# modern python versions that avoids the complicated construct below.
# It avoids guessing the library name. Tested with cpython 3.8 and
# pypy 3.8 on Ubuntu.
libdir: str | None = sysconfig.get_config_var("LIBDIR")
ldlibrary: str | None = sysconfig.get_config_var("LDLIBRARY")
if libdir and ldlibrary and os.path.exists(libdir):
if sysconfig.get_config_var("MULTIARCH"):
masd = sysconfig.get_config_var("multiarchsubdir")
if masd:
if masd.startswith(os.sep):
masd = masd[len(os.sep) :]
libdir_masd = os.path.join(libdir, masd)
if os.path.exists(libdir_masd):
libdir = libdir_masd
libpath = os.path.join(libdir, ldlibrary)
if libpath and os.path.exists(libpath):
return libpath
return CMaker._guess_python_library(python_version)
@staticmethod
def _guess_python_library(python_version: str) -> str | None:
# determine direct path to libpython
python_library: str | None = sysconfig.get_config_var("LIBRARY")
# if static (or nonexistent), try to find a suitable dynamic libpython
if not python_library or os.path.splitext(python_library)[1][-2:] == ".a":
candidate_lib_prefixes = ["", "lib"]
candidate_suffixes = [""]
candidate_implementations = ["python"]
if sys.implementation.name == "pypy":
candidate_implementations[:0] = ["pypy-c", "pypy3-c", "pypy"]
candidate_suffixes.append("-c")
candidate_extensions = [".lib", ".so", ".a"]
# On pypy + MacOS, the variable WITH_DYLD is not set. It would
# actually be possible to determine the python library there using
# LDLIBRARY + LIBDIR. As a simple fix, we check if the LDLIBRARY
# ends with .dylib and add it to the candidate matrix in this case.
with_ld = sysconfig.get_config_var("WITH_DYLD")
ld_lib = sysconfig.get_config_var("LDLIBRARY")
if with_ld or (ld_lib and ld_lib.endswith(".dylib")):
candidate_extensions.insert(0, ".dylib")
candidate_versions = [python_version]
if python_version:
candidate_versions.append("")
candidate_versions.insert(0, "".join(python_version.split(".")[:2]))
abiflags = getattr(sys, "abiflags", "")
candidate_abiflags = [abiflags]
if abiflags:
candidate_abiflags.append("")
# Ensure the value injected by virtualenv is
# returned on windows.
# Because calling `sysconfig.get_config_var('multiarchsubdir')`
# returns an empty string on Linux, `du_sysconfig` is only used to
# get the value of `LIBDIR`.
candidate_libdirs = []
libdir_a = du_sysconfig.get_config_var("LIBDIR")
assert not isinstance(libdir_a, int)
if libdir_a is None:
libdest = sysconfig.get_config_var("LIBDEST")
candidate_libdirs.append(os.path.abspath(os.path.join(libdest, "..", "libs") if libdest else "libs"))
libdir_b = sysconfig.get_config_var("LIBDIR")
for libdir in (libdir_a, libdir_b):
if libdir is None:
continue
if sysconfig.get_config_var("MULTIARCH"):
masd = sysconfig.get_config_var("multiarchsubdir")
if masd:
if masd.startswith(os.sep):
masd = masd[len(os.sep) :]
candidate_libdirs.append(os.path.join(libdir, masd))
candidate_libdirs.append(libdir)
candidates = (
os.path.join(libdir, "".join((pre, impl, ver, abi, suf, ext)))
for (libdir, pre, impl, ext, ver, abi, suf) in itertools.product(
candidate_libdirs,
candidate_lib_prefixes,
candidate_implementations,
candidate_extensions,
candidate_versions,
candidate_abiflags,
candidate_suffixes,
)
)
for candidate in candidates:
if os.path.exists(candidate):
# we found a (likely alternate) libpython
python_library = candidate
break
# Temporary workaround for some libraries (opencv) processing the
# string output. Will return None instead of empty string in future
# versions if the library does not exist.
if python_library is None:
return None
return python_library if python_library and os.path.exists(python_library) else ""
[docs]
@staticmethod
def check_for_bad_installs() -> None:
"""This function tries to catch files that are meant to be installed
outside the project root before they are actually installed.
Indeed, we can not wait for the manifest, so we try to extract the
information (install destination) from the CMake build files
``*.cmake`` found in :func:`skbuild.constants.CMAKE_BUILD_DIR()`.
It raises :class:`skbuild.exceptions.SKBuildError` if it found install destination outside of
:func:`skbuild.constants.CMAKE_INSTALL_DIR()`.
"""
bad_installs = []
install_dir = os.path.join(os.getcwd(), CMAKE_INSTALL_DIR())
for root, _, file_list in os.walk(CMAKE_BUILD_DIR()):
for filename in file_list:
if os.path.splitext(filename)[1] != ".cmake":
continue
with open(os.path.join(root, filename), encoding="utf-8") as fp:
lines = fp.readlines()
for line in lines:
match = RE_FILE_INSTALL.match(line)
if match is None:
continue
destination = os.path.normpath(match.group(1).replace("${CMAKE_INSTALL_PREFIX}", install_dir))
if not destination.startswith(install_dir):
bad_installs.append(os.path.join(destination, os.path.basename(match.group(2))))
if bad_installs:
msg = "\n".join(
(
" CMake-installed files must be within the project root.",
" Project Root:",
f" {install_dir}",
" Violating Files:",
"\n".join(f" {_install}" for _install in bad_installs),
)
)
raise SKBuildError(msg)
[docs]
def make(
self,
clargs: Sequence[str] = (),
config: str = "Release",
source_dir: str = ".",
install_target: str = "install",
env: Mapping[str, str] | None = None,
) -> None:
"""Calls the system-specific make program to compile code.
install_target: string
Name of the target responsible to install the project.
Default is "install".
.. note::
To workaround CMake issue #8438.
See https://gitlab.kitware.com/cmake/cmake/-/issues/8438
Due to a limitation of CMake preventing from adding a dependency
on the "build-all" built-in target, we explicitly build the project first when
the install target is different from the default on.
"""
clargs, config = pop_arg("--config", clargs, config)
clargs, install_target = pop_arg("--install-target", clargs, install_target)
if not os.path.exists(CMAKE_BUILD_DIR()):
msg = (
f"CMake build folder ({CMAKE_BUILD_DIR()}) does not exist. "
"Did you forget to run configure before make?"
)
raise SKBuildError(msg)
# Workaround CMake issue #8438
# See https://gitlab.kitware.com/cmake/cmake/-/issues/8438
# Due to a limitation of CMake preventing from adding a dependency
# on the "build-all" built-in target, we explicitly build
# the project first when
# the install target is different from the default on.
if install_target != "install":
self.make_impl(clargs=clargs, config=config, source_dir=source_dir, install_target=None, env=env)
self.make_impl(clargs=clargs, config=config, source_dir=source_dir, install_target=install_target, env=env)
[docs]
def make_impl(
self,
clargs: list[str],
config: str,
source_dir: str,
install_target: str | None,
env: Mapping[str, str] | None = None,
) -> None:
"""
Precondition: clargs does not have --config nor --install-target options.
These command line arguments are extracted in the caller function
`make` with `clargs, config = pop_arg('--config', clargs, config)`
This is a refactor effort for calling the function `make` twice in
case the install_target is different than the default `install`.
"""
if not install_target:
cmd = [self.cmake_executable, "--build", source_dir, "--config", config, "--"]
else:
cmd = [self.cmake_executable, "--build", source_dir, "--target", install_target, "--config", config, "--"]
cmd.extend(clargs)
cmd.extend(filter(bool, shlex.split(os.environ.get("SKBUILD_BUILD_OPTIONS", ""))))
rtn = subprocess.run(cmd, cwd=CMAKE_BUILD_DIR(), env=env, check=False).returncode
# For reporting errors (if any)
if not install_target:
install_target = "internal build step [valid]"
if rtn != 0:
msg = textwrap.dedent(
f"""\
An error occurred while building with CMake.
Command:
{self._formatArgsForDisplay(cmd)}
Install target:
{install_target}
Source directory:
{os.path.abspath(source_dir)}
Working directory:
{os.path.abspath(CMAKE_BUILD_DIR())}
Please check the install target is valid and see CMake's output for more information.
"""
)
raise SKBuildError(msg)
[docs]
def install(self) -> list[str]:
"""Returns a list of file paths to install via setuptools that is
compatible with the data_files keyword argument.
"""
return self._parse_manifests()
def _parse_manifests(self) -> list[str]:
paths = glob.glob(os.path.join(CMAKE_BUILD_DIR(), "install_manifest*.txt"))
try:
return next(self._parse_manifest(path) for path in paths)
except StopIteration:
return []
@staticmethod
def _parse_manifest(install_manifest_path: str) -> list[str]:
with open(install_manifest_path, encoding="utf-8") as manifest:
return [_remove_cwd_prefix(path) for path in manifest]
@staticmethod
def _formatArgsForDisplay(args: Sequence[str]) -> str:
"""Format a list of arguments appropriately for display. When formatting
a command and its arguments, the user should be able to execute the
command by copying and pasting the output directly into a shell.
Currently, the only formatting is naively surrounding each argument with
quotation marks.
"""
return " ".join(quote(arg) for arg in args)
