1# Copyright 2024 The Bazel Authors. All rights reserved. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14 15"""Create toolchain alias targets.""" 16 17load("@rules_python//python:versions.bzl", "PLATFORMS") 18 19def toolchain_aliases(*, name, platforms, visibility = None, native = native): 20 """Create toolchain aliases for the python toolchains. 21 22 Args: 23 name: {type}`str` The name of the current repository. 24 platforms: {type}`platforms` The list of platforms that are supported 25 for the current toolchain repository. 26 visibility: {type}`list[Target] | None` The visibility of the aliases. 27 native: The native struct used in the macro, useful for testing. 28 """ 29 for platform in PLATFORMS.keys(): 30 if platform not in platforms: 31 continue 32 33 native.config_setting( 34 name = platform, 35 flag_values = PLATFORMS[platform].flag_values, 36 constraint_values = PLATFORMS[platform].compatible_with, 37 visibility = ["//visibility:private"], 38 ) 39 40 prefix = name 41 for name in [ 42 "files", 43 "includes", 44 "libpython", 45 "py3_runtime", 46 "python_headers", 47 "python_runtimes", 48 ]: 49 native.alias( 50 name = name, 51 actual = select({ 52 ":" + platform: "@{}_{}//:{}".format(prefix, platform, name) 53 for platform in platforms 54 }), 55 visibility = visibility, 56 ) 57 58 native.alias( 59 name = "python3", 60 actual = select({ 61 ":" + platform: "@{}_{}//:{}".format(prefix, platform, "python.exe" if "windows" in platform else "bin/python3") 62 for platform in platforms 63 }), 64 visibility = visibility, 65 ) 66 native.alias( 67 name = "pip", 68 actual = select({ 69 ":" + platform: "@{}_{}//:python_runtimes".format(prefix, platform) 70 for platform in platforms 71 if "windows" not in platform 72 }), 73 visibility = visibility, 74 ) 75