|
|
|
# Adapted with modifications from tensorflow/third_party/py/
|
|
|
|
"""Repository rule for Python autoconfiguration.
|
|
|
|
|
|
|
|
`python_configure` depends on the following environment variables:
|
|
|
|
|
|
|
|
* `PYTHON2_BIN_PATH`: location of python binary.
|
|
|
|
* `PYTHON2_LIB_PATH`: Location of python libraries.
|
|
|
|
"""
|
|
|
|
|
|
|
|
_BAZEL_SH = "BAZEL_SH"
|
|
|
|
_PYTHON2_BIN_PATH = "PYTHON2_BIN_PATH"
|
|
|
|
_PYTHON2_LIB_PATH = "PYTHON2_LIB_PATH"
|
|
|
|
_PYTHON3_BIN_PATH = "PYTHON3_BIN_PATH"
|
|
|
|
_PYTHON3_LIB_PATH = "PYTHON3_LIB_PATH"
|
|
|
|
|
|
|
|
|
|
|
|
def _tpl(repository_ctx, tpl, substitutions={}, out=None):
|
|
|
|
if not out:
|
|
|
|
out = tpl
|
|
|
|
repository_ctx.template(out, Label("//third_party/py:%s.tpl" % tpl),
|
|
|
|
substitutions)
|
|
|
|
|
|
|
|
|
|
|
|
def _fail(msg):
|
|
|
|
"""Output failure message when auto configuration fails."""
|
|
|
|
red = "\033[0;31m"
|
|
|
|
no_color = "\033[0m"
|
|
|
|
fail("%sPython Configuration Error:%s %s\n" % (red, no_color, msg))
|
|
|
|
|
|
|
|
|
|
|
|
def _is_windows(repository_ctx):
|
|
|
|
"""Returns true if the host operating system is windows."""
|
|
|
|
os_name = repository_ctx.os.name.lower()
|
|
|
|
return os_name.find("windows") != -1
|
|
|
|
|
|
|
|
|
|
|
|
def _execute(repository_ctx,
|
|
|
|
cmdline,
|
|
|
|
error_msg=None,
|
|
|
|
error_details=None,
|
|
|
|
empty_stdout_fine=False):
|
|
|
|
"""Executes an arbitrary shell command.
|
|
|
|
|
|
|
|
Args:
|
|
|
|
repository_ctx: the repository_ctx object
|
|
|
|
cmdline: list of strings, the command to execute
|
|
|
|
error_msg: string, a summary of the error if the command fails
|
|
|
|
error_details: string, details about the error or steps to fix it
|
|
|
|
empty_stdout_fine: bool, if True, an empty stdout result is fine, otherwise
|
|
|
|
it's an error
|
|
|
|
Return:
|
|
|
|
the result of repository_ctx.execute(cmdline)
|
|
|
|
"""
|
|
|
|
result = repository_ctx.execute(cmdline)
|
|
|
|
if result.stderr or not (empty_stdout_fine or result.stdout):
|
|
|
|
_fail("\n".join([
|
|
|
|
error_msg.strip() if error_msg else "Repository command failed",
|
|
|
|
result.stderr.strip(), error_details if error_details else ""
|
|
|
|
]))
|
|
|
|
else:
|
|
|
|
return result
|
|
|
|
|
|
|
|
|
|
|
|
def _read_dir(repository_ctx, src_dir):
|
|
|
|
"""Returns a string with all files in a directory.
|
|
|
|
|
|
|
|
Finds all files inside a directory, traversing subfolders and following
|
|
|
|
symlinks. The returned string contains the full path of all files
|
|
|
|
separated by line breaks.
|
|
|
|
"""
|
|
|
|
if _is_windows(repository_ctx):
|
|
|
|
src_dir = src_dir.replace("/", "\\")
|
|
|
|
find_result = _execute(
|
|
|
|
repository_ctx,
|
|
|
|
["cmd.exe", "/c", "dir", src_dir, "/b", "/s", "/a-d"],
|
|
|
|
empty_stdout_fine=True)
|
|
|
|
# src_files will be used in genrule.outs where the paths must
|
|
|
|
# use forward slashes.
|
|
|
|
return find_result.stdout.replace("\\", "/")
|
|
|
|
else:
|
|
|
|
find_result = _execute(
|
|
|
|
repository_ctx, ["find", src_dir, "-follow", "-type", "f"],
|
|
|
|
empty_stdout_fine=True)
|
|
|
|
return find_result.stdout
|
|
|
|
|
|
|
|
|
|
|
|
def _genrule(src_dir, genrule_name, command, outs):
|
|
|
|
"""Returns a string with a genrule.
|
|
|
|
|
|
|
|
Genrule executes the given command and produces the given outputs.
|
|
|
|
"""
|
|
|
|
return ('genrule(\n' + ' name = "' + genrule_name + '",\n' +
|
|
|
|
' outs = [\n' + outs + '\n ],\n' + ' cmd = """\n' +
|
|
|
|
command + '\n """,\n' + ')\n')
|
|
|
|
|
|
|
|
|
|
|
|
def _normalize_path(path):
|
|
|
|
"""Returns a path with '/' and remove the trailing slash."""
|
|
|
|
path = path.replace("\\", "/")
|
|
|
|
if path[-1] == "/":
|
|
|
|
path = path[:-1]
|
|
|
|
return path
|
|
|
|
|
|
|
|
|
|
|
|
def _symlink_genrule_for_dir(repository_ctx,
|
|
|
|
src_dir,
|
|
|
|
dest_dir,
|
|
|
|
genrule_name,
|
|
|
|
src_files=[],
|
|
|
|
dest_files=[]):
|
|
|
|
"""Returns a genrule to symlink(or copy if on Windows) a set of files.
|
|
|
|
|
|
|
|
If src_dir is passed, files will be read from the given directory; otherwise
|
|
|
|
we assume files are in src_files and dest_files
|
|
|
|
"""
|
|
|
|
if src_dir != None:
|
|
|
|
src_dir = _normalize_path(src_dir)
|
|
|
|
dest_dir = _normalize_path(dest_dir)
|
|
|
|
files = '\n'.join(
|
|
|
|
sorted(_read_dir(repository_ctx, src_dir).splitlines()))
|
|
|
|
# Create a list with the src_dir stripped to use for outputs.
|
|
|
|
dest_files = files.replace(src_dir, '').splitlines()
|
|
|
|
src_files = files.splitlines()
|
|
|
|
command = []
|
|
|
|
outs = []
|
|
|
|
for i in range(len(dest_files)):
|
|
|
|
if dest_files[i] != "":
|
|
|
|
# If we have only one file to link we do not want to use the dest_dir, as
|
|
|
|
# $(@D) will include the full path to the file.
|
|
|
|
dest = '$(@D)/' + dest_dir + dest_files[i] if len(
|
|
|
|
dest_files) != 1 else '$(@D)/' + dest_files[i]
|
|
|
|
# On Windows, symlink is not supported, so we just copy all the files.
|
|
|
|
cmd = 'cp -f' if _is_windows(repository_ctx) else 'ln -s'
|
|
|
|
command.append(cmd + ' "%s" "%s"' % (src_files[i], dest))
|
|
|
|
outs.append(' "' + dest_dir + dest_files[i] + '",')
|
|
|
|
return _genrule(src_dir, genrule_name, " && ".join(command),
|
|
|
|
"\n".join(outs))
|
|
|
|
|
|
|
|
|
|
|
|
def _get_python_bin(repository_ctx, bin_path_key, default_bin_path):
|
|
|
|
"""Gets the python bin path."""
|
|
|
|
python_bin = repository_ctx.os.environ.get(bin_path_key, default_bin_path)
|
|
|
|
if not repository_ctx.path(python_bin).exists:
|
|
|
|
# It's a command, use 'which' to find its path.
|
|
|
|
python_bin_path = repository_ctx.which(python_bin)
|
|
|
|
else:
|
|
|
|
# It's a path, use it as it is.
|
|
|
|
python_bin_path = python_bin
|
|
|
|
if python_bin_path != None:
|
|
|
|
return str(python_bin_path)
|
|
|
|
_fail("Cannot find python in PATH, please make sure " +
|
|
|
|
"python is installed and add its directory in PATH, or --define " +
|
|
|
|
"%s='/something/else'.\nPATH=%s" %
|
|
|
|
(bin_path_key, repository_ctx.os.environ.get("PATH", "")))
|
|
|
|
|
|
|
|
|
|
|
|
def _get_bash_bin(repository_ctx):
|
|
|
|
"""Gets the bash bin path."""
|
|
|
|
bash_bin = repository_ctx.os.environ.get(_BAZEL_SH)
|
|
|
|
if bash_bin != None:
|
|
|
|
return bash_bin
|
|
|
|
else:
|
|
|
|
bash_bin_path = repository_ctx.which("bash")
|
|
|
|
if bash_bin_path != None:
|
|
|
|
return str(bash_bin_path)
|
|
|
|
else:
|
|
|
|
_fail(
|
|
|
|
"Cannot find bash in PATH, please make sure " +
|
|
|
|
"bash is installed and add its directory in PATH, or --define "
|
|
|
|
+ "%s='/path/to/bash'.\nPATH=%s" %
|
|
|
|
(_BAZEL_SH, repository_ctx.os.environ.get("PATH", "")))
|
|
|
|
|
|
|
|
|
|
|
|
def _get_python_lib(repository_ctx, python_bin, lib_path_key):
|
|
|
|
"""Gets the python lib path."""
|
|
|
|
python_lib = repository_ctx.os.environ.get(lib_path_key)
|
|
|
|
if python_lib != None:
|
|
|
|
return python_lib
|
|
|
|
print_lib = (
|
|
|
|
"<<END\n" + "from __future__ import print_function\n" +
|
|
|
|
"import site\n" + "import os\n" + "\n" + "try:\n" +
|
|
|
|
" input = raw_input\n" + "except NameError:\n" + " pass\n" + "\n" +
|
|
|
|
"python_paths = []\n" + "if os.getenv('PYTHONPATH') is not None:\n" +
|
|
|
|
" python_paths = os.getenv('PYTHONPATH').split(':')\n" + "try:\n" +
|
|
|
|
" library_paths = site.getsitepackages()\n" +
|
|
|
|
"except AttributeError:\n" +
|
|
|
|
" from distutils.sysconfig import get_python_lib\n" +
|
|
|
|
" library_paths = [get_python_lib()]\n" +
|
|
|
|
"all_paths = set(python_paths + library_paths)\n" + "paths = []\n" +
|
|
|
|
"for path in all_paths:\n" + " if os.path.isdir(path):\n" +
|
|
|
|
" paths.append(path)\n" + "if len(paths) >=1:\n" +
|
|
|
|
" print(paths[0])\n" + "END")
|
|
|
|
cmd = '%s - %s' % (python_bin, print_lib)
|
|
|
|
result = repository_ctx.execute([_get_bash_bin(repository_ctx), "-c", cmd])
|
|
|
|
return result.stdout.strip('\n')
|
|
|
|
|
|
|
|
|
|
|
|
def _check_python_lib(repository_ctx, python_lib):
|
|
|
|
"""Checks the python lib path."""
|
|
|
|
cmd = 'test -d "%s" -a -x "%s"' % (python_lib, python_lib)
|
|
|
|
result = repository_ctx.execute([_get_bash_bin(repository_ctx), "-c", cmd])
|
|
|
|
if result.return_code == 1:
|
|
|
|
_fail("Invalid python library path: %s" % python_lib)
|
|
|
|
|
|
|
|
|
|
|
|
def _check_python_bin(repository_ctx, python_bin, bin_path_key):
|
|
|
|
"""Checks the python bin path."""
|
|
|
|
cmd = '[[ -x "%s" ]] && [[ ! -d "%s" ]]' % (python_bin, python_bin)
|
|
|
|
result = repository_ctx.execute([_get_bash_bin(repository_ctx), "-c", cmd])
|
|
|
|
if result.return_code == 1:
|
|
|
|
_fail("--define %s='%s' is not executable. Is it the python binary?" %
|
|
|
|
(bin_path_key, python_bin))
|
|
|
|
|
|
|
|
|
|
|
|
def _get_python_include(repository_ctx, python_bin):
|
|
|
|
"""Gets the python include path."""
|
|
|
|
result = _execute(
|
|
|
|
repository_ctx, [
|
|
|
|
python_bin, "-c", 'from __future__ import print_function;' +
|
|
|
|
'from distutils import sysconfig;' +
|
|
|
|
'print(sysconfig.get_python_inc())'
|
|
|
|
],
|
|
|
|
error_msg="Problem getting python include path.",
|
|
|
|
error_details=(
|
|
|
|
"Is the Python binary path set up right? " + "(See ./configure or "
|
|
|
|
+ _PYTHON2_BIN_PATH + ".) " + "Is distutils installed?"))
|
|
|
|
return result.stdout.splitlines()[0]
|
|
|
|
|
|
|
|
|
|
|
|
def _get_python_import_lib_name(repository_ctx, python_bin, bin_path_key):
|
|
|
|
"""Get Python import library name (pythonXY.lib) on Windows."""
|
|
|
|
result = _execute(
|
|
|
|
repository_ctx, [
|
|
|
|
python_bin, "-c",
|
|
|
|
'import sys;' + 'print("python" + str(sys.version_info[0]) + ' +
|
|
|
|
' str(sys.version_info[1]) + ".lib")'
|
|
|
|
],
|
|
|
|
error_msg="Problem getting python import library.",
|
|
|
|
error_details=("Is the Python binary path set up right? " +
|
|
|
|
"(See ./configure or " + bin_path_key + ".) "))
|
|
|
|
return result.stdout.splitlines()[0]
|
|
|
|
|
|
|
|
|
|
|
|
def _create_single_version_package(repository_ctx,
|
|
|
|
variety_name,
|
|
|
|
bin_path_key,
|
|
|
|
default_bin_path,
|
|
|
|
lib_path_key):
|
|
|
|
"""Creates the repository containing files set up to build with Python."""
|
|
|
|
python_bin = _get_python_bin(repository_ctx, bin_path_key, default_bin_path)
|
|
|
|
_check_python_bin(repository_ctx, python_bin, bin_path_key)
|
|
|
|
python_lib = _get_python_lib(repository_ctx, python_bin, lib_path_key)
|
|
|
|
_check_python_lib(repository_ctx, python_lib)
|
|
|
|
python_include = _get_python_include(repository_ctx, python_bin)
|
|
|
|
python_include_rule = _symlink_genrule_for_dir(
|
|
|
|
repository_ctx, python_include, '{}_include'.format(variety_name),
|
|
|
|
'{}_include'.format(variety_name))
|
|
|
|
python_import_lib_genrule = ""
|
|
|
|
# To build Python C/C++ extension on Windows, we need to link to python import library pythonXY.lib
|
|
|
|
# See https://docs.python.org/3/extending/windows.html
|
|
|
|
if _is_windows(repository_ctx):
|
|
|
|
python_include = _normalize_path(python_include)
|
|
|
|
python_import_lib_name = _get_python_import_lib_name, bin_path_key(
|
|
|
|
repository_ctx, python_bin)
|
|
|
|
python_import_lib_src = python_include.rsplit(
|
|
|
|
'/', 1)[0] + "/libs/" + python_import_lib_name
|
|
|
|
python_import_lib_genrule = _symlink_genrule_for_dir(
|
|
|
|
repository_ctx, None, '', '{}_import_lib'.format(variety_name),
|
|
|
|
[python_import_lib_src], [python_import_lib_name])
|
|
|
|
_tpl(
|
|
|
|
repository_ctx, "variety", {
|
|
|
|
"%{PYTHON_INCLUDE_GENRULE}": python_include_rule,
|
|
|
|
"%{PYTHON_IMPORT_LIB_GENRULE}": python_import_lib_genrule,
|
|
|
|
"%{VARIETY_NAME}": variety_name,
|
|
|
|
},
|
|
|
|
out="{}/BUILD".format(variety_name))
|
|
|
|
|
|
|
|
|
|
|
|
def _python_autoconf_impl(repository_ctx):
|
|
|
|
"""Implementation of the python_autoconf repository rule."""
|
|
|
|
_create_single_version_package(repository_ctx,
|
|
|
|
"_python2",
|
|
|
|
_PYTHON2_BIN_PATH,
|
|
|
|
"python",
|
|
|
|
_PYTHON2_LIB_PATH)
|
|
|
|
_create_single_version_package(repository_ctx,
|
|
|
|
"_python3",
|
|
|
|
_PYTHON3_BIN_PATH,
|
|
|
|
"python3",
|
|
|
|
_PYTHON3_LIB_PATH)
|
|
|
|
_tpl(repository_ctx, "BUILD")
|
|
|
|
|
|
|
|
|
|
|
|
python_configure = repository_rule(
|
|
|
|
implementation=_python_autoconf_impl,
|
|
|
|
environ=[
|
|
|
|
_BAZEL_SH,
|
|
|
|
_PYTHON2_BIN_PATH,
|
|
|
|
_PYTHON2_LIB_PATH,
|
|
|
|
_PYTHON3_BIN_PATH,
|
|
|
|
_PYTHON3_LIB_PATH,
|
|
|
|
],
|
|
|
|
)
|
|
|
|
"""Detects and configures the local Python.
|
|
|
|
|
|
|
|
It is expected that the system have both a working Python 2 and python 3
|
|
|
|
installation
|
|
|
|
|
|
|
|
Add the following to your WORKSPACE FILE:
|
|
|
|
|
|
|
|
```python
|
|
|
|
python_configure(name = "local_config_python")
|
|
|
|
```
|
|
|
|
|
|
|
|
Args:
|
|
|
|
name: A unique name for this workspace rule.
|
|
|
|
"""
|
|
|
|
|