diff --git a/.bazelrc b/.bazelrc index 66a644e28..c44124d96 100644 --- a/.bazelrc +++ b/.bazelrc @@ -4,8 +4,8 @@ # (Note, we cannot use `common --deleted_packages` because the bazel version command doesn't support it) # To update these lines, execute # `bazel run @rules_bazel_integration_test//tools:update_deleted_packages` -build --deleted_packages=examples/build_file_generation,examples/build_file_generation/random_number_generator,examples/bzlmod,examples/bzlmod/entry_points,examples/bzlmod/entry_points/tests,examples/bzlmod/libs/my_lib,examples/bzlmod/other_module,examples/bzlmod/other_module/other_module/pkg,examples/bzlmod/patches,examples/bzlmod/py_proto_library,examples/bzlmod/py_proto_library/example.com/another_proto,examples/bzlmod/py_proto_library/example.com/proto,examples/bzlmod/runfiles,examples/bzlmod/tests,examples/bzlmod/tests/other_module,examples/bzlmod/whl_mods,examples/bzlmod_build_file_generation,examples/bzlmod_build_file_generation/other_module/other_module/pkg,examples/bzlmod_build_file_generation/runfiles,examples/multi_python_versions/libs/my_lib,examples/multi_python_versions/requirements,examples/multi_python_versions/tests,examples/pip_parse,examples/pip_parse_vendored,examples/pip_repository_annotations,examples/py_proto_library,examples/py_proto_library/example.com/another_proto,examples/py_proto_library/example.com/proto,gazelle,gazelle/manifest,gazelle/manifest/generate,gazelle/manifest/hasher,gazelle/manifest/test,gazelle/modules_mapping,gazelle/python,gazelle/python/private,gazelle/pythonconfig,tests/integration/compile_pip_requirements,tests/integration/compile_pip_requirements_test_from_external_repo,tests/integration/custom_commands,tests/integration/ignore_root_user_error,tests/integration/ignore_root_user_error/submodule,tests/integration/local_toolchains,tests/integration/pip_parse,tests/integration/pip_parse/empty,tests/integration/py_cc_toolchain_registered -query --deleted_packages=examples/build_file_generation,examples/build_file_generation/random_number_generator,examples/bzlmod,examples/bzlmod/entry_points,examples/bzlmod/entry_points/tests,examples/bzlmod/libs/my_lib,examples/bzlmod/other_module,examples/bzlmod/other_module/other_module/pkg,examples/bzlmod/patches,examples/bzlmod/py_proto_library,examples/bzlmod/py_proto_library/example.com/another_proto,examples/bzlmod/py_proto_library/example.com/proto,examples/bzlmod/runfiles,examples/bzlmod/tests,examples/bzlmod/tests/other_module,examples/bzlmod/whl_mods,examples/bzlmod_build_file_generation,examples/bzlmod_build_file_generation/other_module/other_module/pkg,examples/bzlmod_build_file_generation/runfiles,examples/multi_python_versions/libs/my_lib,examples/multi_python_versions/requirements,examples/multi_python_versions/tests,examples/pip_parse,examples/pip_parse_vendored,examples/pip_repository_annotations,examples/py_proto_library,examples/py_proto_library/example.com/another_proto,examples/py_proto_library/example.com/proto,gazelle,gazelle/manifest,gazelle/manifest/generate,gazelle/manifest/hasher,gazelle/manifest/test,gazelle/modules_mapping,gazelle/python,gazelle/python/private,gazelle/pythonconfig,tests/integration/compile_pip_requirements,tests/integration/compile_pip_requirements_test_from_external_repo,tests/integration/custom_commands,tests/integration/ignore_root_user_error,tests/integration/ignore_root_user_error/submodule,tests/integration/local_toolchains,tests/integration/pip_parse,tests/integration/pip_parse/empty,tests/integration/py_cc_toolchain_registered +build --deleted_packages=examples/build_file_generation,examples/build_file_generation/random_number_generator,examples/bzlmod,examples/bzlmod_build_file_generation,examples/bzlmod_build_file_generation/other_module/other_module/pkg,examples/bzlmod_build_file_generation/runfiles,examples/bzlmod/entry_points,examples/bzlmod/entry_points/tests,examples/bzlmod/libs/my_lib,examples/bzlmod/other_module,examples/bzlmod/other_module/other_module/pkg,examples/bzlmod/patches,examples/bzlmod/py_proto_library,examples/bzlmod/py_proto_library/example.com/another_proto,examples/bzlmod/py_proto_library/example.com/proto,examples/bzlmod/runfiles,examples/bzlmod/tests,examples/bzlmod/tests/other_module,examples/bzlmod/whl_mods,examples/multi_python_versions/libs/my_lib,examples/multi_python_versions/requirements,examples/multi_python_versions/tests,examples/pip_parse,examples/pip_parse_vendored,examples/pip_repository_annotations,examples/py_proto_library,examples/py_proto_library/example.com/another_proto,examples/py_proto_library/example.com/proto,gazelle,gazelle/manifest,gazelle/manifest/generate,gazelle/manifest/hasher,gazelle/manifest/test,gazelle/modules_mapping,gazelle/python,gazelle/pythonconfig,gazelle/python/private,tests/integration/compile_pip_requirements,tests/integration/compile_pip_requirements_test_from_external_repo,tests/integration/custom_commands,tests/integration/ignore_root_user_error,tests/integration/ignore_root_user_error/submodule,tests/integration/local_toolchains,tests/integration/pip_parse,tests/integration/pip_parse/empty,tests/integration/py_cc_toolchain_registered +query --deleted_packages=examples/build_file_generation,examples/build_file_generation/random_number_generator,examples/bzlmod,examples/bzlmod_build_file_generation,examples/bzlmod_build_file_generation/other_module/other_module/pkg,examples/bzlmod_build_file_generation/runfiles,examples/bzlmod/entry_points,examples/bzlmod/entry_points/tests,examples/bzlmod/libs/my_lib,examples/bzlmod/other_module,examples/bzlmod/other_module/other_module/pkg,examples/bzlmod/patches,examples/bzlmod/py_proto_library,examples/bzlmod/py_proto_library/example.com/another_proto,examples/bzlmod/py_proto_library/example.com/proto,examples/bzlmod/runfiles,examples/bzlmod/tests,examples/bzlmod/tests/other_module,examples/bzlmod/whl_mods,examples/multi_python_versions/libs/my_lib,examples/multi_python_versions/requirements,examples/multi_python_versions/tests,examples/pip_parse,examples/pip_parse_vendored,examples/pip_repository_annotations,examples/py_proto_library,examples/py_proto_library/example.com/another_proto,examples/py_proto_library/example.com/proto,gazelle,gazelle/manifest,gazelle/manifest/generate,gazelle/manifest/hasher,gazelle/manifest/test,gazelle/modules_mapping,gazelle/python,gazelle/pythonconfig,gazelle/python/private,tests/integration/compile_pip_requirements,tests/integration/compile_pip_requirements_test_from_external_repo,tests/integration/custom_commands,tests/integration/ignore_root_user_error,tests/integration/ignore_root_user_error/submodule,tests/integration/local_toolchains,tests/integration/pip_parse,tests/integration/pip_parse/empty,tests/integration/py_cc_toolchain_registered test --test_output=errors diff --git a/CHANGELOG.md b/CHANGELOG.md index 9cd6b8275..5b5d045ed 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -74,6 +74,8 @@ Unreleased changes template. Other changes: * (python_repository) Start honoring the `strip_prefix` field for `zstd` archives. * (pypi) {bzl:obj}`pip_parse.extra_hub_aliases` now works in WORKSPACE files. +* (binaries/tests) For {obj}`--bootstrap_impl=script`, a binary-specific (but + otherwise empty) virtual env is used to customize `sys.path` initialization. {#v0-0-0-fixed} ### Fixed @@ -83,6 +85,9 @@ Other changes: Fixes ([2337](https://github.com/bazelbuild/rules_python/issues/2337)). * (uv): Correct the sha256sum for the `uv` binary for aarch64-apple-darwin. Fixes ([2411](https://github.com/bazelbuild/rules_python/issues/2411)). +* (binaries/tests) ({obj}`--bootstrap_impl=scipt`) Using `sys.executable` will + use the same `sys.path` setup as the calling binary. + ([2169](https://github.com/bazelbuild/rules_python/issues/2169)). {#v0-0-0-added} ### Added @@ -97,6 +102,9 @@ Other changes: for the latest toolchain versions for each minor Python version. You can control the toolchain selection by using the {bzl:obj}`//python/config_settings:py_linux_libc` build flag. +* (providers) Added {obj}`py_runtime_info.site_init_template` and + {obj}`PyRuntimeInfo.site_init_template` for specifying the template to use to + initialize the interpreter via venv startup hooks. {#v0-0-0-removed} ### Removed diff --git a/python/private/BUILD.bazel b/python/private/BUILD.bazel index 39af217bf..9772089e9 100644 --- a/python/private/BUILD.bazel +++ b/python/private/BUILD.bazel @@ -702,6 +702,14 @@ filegroup( visibility = ["//visibility:public"], ) +filegroup( + name = "site_init_template", + srcs = ["site_init_template.py"], + # Not actually public. Only public because it's an implicit dependency of + # py_runtime. + visibility = ["//visibility:public"], +) + # NOTE: Windows builds don't use this bootstrap. Instead, a native Windows # program locates some Python exe and runs `python.exe foo.zip` which # runs the __main__.py in the zip file. diff --git a/python/private/py_executable_bazel.bzl b/python/private/py_executable_bazel.bzl index 6f9c0947a..60c3815c9 100644 --- a/python/private/py_executable_bazel.bzl +++ b/python/private/py_executable_bazel.bzl @@ -81,6 +81,9 @@ the `srcs` of Python targets as required. "_py_toolchain_type": attr.label( default = TARGET_TOOLCHAIN_TYPE, ), + "_python_version_flag": attr.label( + default = "//python/config_settings:python_version", + ), "_windows_launcher_maker": attr.label( default = "@bazel_tools//tools/launcher:launcher_maker", cfg = "exec", @@ -177,6 +180,8 @@ def _create_executable( else: base_executable_name = executable.basename + venv = None + # The check for stage2_bootstrap_template is to support legacy # BuiltinPyRuntimeInfo providers, which is likely to come from # @bazel_tools//tools/python:autodetecting_toolchain, the toolchain used @@ -184,6 +189,13 @@ def _create_executable( if (BootstrapImplFlag.get_value(ctx) == BootstrapImplFlag.SCRIPT and runtime_details.effective_runtime and hasattr(runtime_details.effective_runtime, "stage2_bootstrap_template")): + venv = _create_venv( + ctx, + output_prefix = base_executable_name, + imports = imports, + runtime_details = runtime_details, + ) + stage2_bootstrap = _create_stage2_bootstrap( ctx, output_prefix = base_executable_name, @@ -192,11 +204,12 @@ def _create_executable( imports = imports, runtime_details = runtime_details, ) - extra_runfiles = ctx.runfiles([stage2_bootstrap]) + extra_runfiles = ctx.runfiles([stage2_bootstrap] + venv.files_without_interpreter) zip_main = _create_zip_main( ctx, stage2_bootstrap = stage2_bootstrap, runtime_details = runtime_details, + venv = venv, ) else: stage2_bootstrap = None @@ -272,6 +285,7 @@ def _create_executable( zip_file = zip_file, stage2_bootstrap = stage2_bootstrap, runtime_details = runtime_details, + venv = venv, ) elif bootstrap_output: _create_stage1_bootstrap( @@ -282,6 +296,7 @@ def _create_executable( is_for_zip = False, imports = imports, main_py = main_py, + venv = venv, ) else: # Otherwise, this should be the Windows case of launcher + zip. @@ -296,13 +311,20 @@ def _create_executable( build_zip_enabled = build_zip_enabled, )) + # The interpreter is added this late in the process so that it isn't + # added to the zipped files. + if venv: + extra_runfiles = extra_runfiles.merge(ctx.runfiles([venv.interpreter])) return create_executable_result_struct( extra_files_to_build = depset(extra_files_to_build), output_groups = {"python_zip_file": depset([zip_file])}, extra_runfiles = extra_runfiles, ) -def _create_zip_main(ctx, *, stage2_bootstrap, runtime_details): +def _create_zip_main(ctx, *, stage2_bootstrap, runtime_details, venv): + python_binary = _runfiles_root_path(ctx, venv.interpreter.short_path) + python_binary_actual = _runfiles_root_path(ctx, venv.interpreter_actual_path) + # The location of this file doesn't really matter. It's added to # the zip file as the top-level __main__.py file and not included # elsewhere. @@ -311,7 +333,8 @@ def _create_zip_main(ctx, *, stage2_bootstrap, runtime_details): template = runtime_details.effective_runtime.zip_main_template, output = output, substitutions = { - "%python_binary%": runtime_details.executable_interpreter_path, + "%python_binary%": python_binary, + "%python_binary_actual%": python_binary_actual, "%stage2_bootstrap%": "{}/{}".format( ctx.workspace_name, stage2_bootstrap.short_path, @@ -321,6 +344,82 @@ def _create_zip_main(ctx, *, stage2_bootstrap, runtime_details): ) return output +# Create a venv the executable can use. +# For venv details and the venv startup process, see: +# * https://docs.python.org/3/library/venv.html +# * https://snarky.ca/how-virtual-environments-work/ +# * https://github.com/python/cpython/blob/main/Modules/getpath.py +# * https://github.com/python/cpython/blob/main/Lib/site.py +def _create_venv(ctx, output_prefix, imports, runtime_details): + venv = "_{}.venv".format(output_prefix.lstrip("_")) + + # The pyvenv.cfg file must be present to trigger the venv site hooks. + # Because it's paths are expected to be absolute paths, we can't reliably + # put much in it. See https://github.com/python/cpython/issues/83650 + pyvenv_cfg = ctx.actions.declare_file("{}/pyvenv.cfg".format(venv)) + ctx.actions.write(pyvenv_cfg, "") + + runtime = runtime_details.effective_runtime + if runtime.interpreter: + py_exe_basename = paths.basename(runtime.interpreter.short_path) + + # Even though ctx.actions.symlink() is used, using + # declare_symlink() is required to ensure that the resulting file + # in runfiles is always a symlink. An RBE implementation, for example, + # may choose to write what symlink() points to instead. + interpreter = ctx.actions.declare_symlink("{}/bin/{}".format(venv, py_exe_basename)) + interpreter_actual_path = runtime.interpreter.short_path + parent = "/".join([".."] * (interpreter_actual_path.count("/") + 1)) + rel_path = parent + "/" + interpreter_actual_path + ctx.actions.symlink(output = interpreter, target_path = rel_path) + else: + py_exe_basename = paths.basename(runtime.interpreter_path) + interpreter = ctx.actions.declare_symlink("{}/bin/{}".format(venv, py_exe_basename)) + ctx.actions.symlink(output = interpreter, target_path = runtime.interpreter_path) + interpreter_actual_path = runtime.interpreter_path + + if runtime.interpreter_version_info: + version = "{}.{}".format( + runtime.interpreter_version_info.major, + runtime.interpreter_version_info.minor, + ) + else: + version_flag = ctx.attr._python_version_flag[config_common.FeatureFlagInfo].value + version_flag_parts = version_flag.split(".")[0:2] + version = "{}.{}".format(*version_flag_parts) + + # See site.py logic: free-threaded builds append "t" to the venv lib dir name + if "t" in runtime.abi_flags: + version += "t" + + site_packages = "{}/lib/python{}/site-packages".format(venv, version) + pth = ctx.actions.declare_file("{}/bazel.pth".format(site_packages)) + ctx.actions.write(pth, "import _bazel_site_init\n") + + site_init = ctx.actions.declare_file("{}/_bazel_site_init.py".format(site_packages)) + computed_subs = ctx.actions.template_dict() + computed_subs.add_joined("%imports%", imports, join_with = ":", map_each = _map_each_identity) + ctx.actions.expand_template( + template = runtime.site_init_template, + output = site_init, + substitutions = { + "%import_all%": "True" if ctx.fragments.bazel_py.python_import_all_repositories else "False", + "%site_init_runfiles_path%": "{}/{}".format(ctx.workspace_name, site_init.short_path), + "%workspace_name%": ctx.workspace_name, + }, + computed_substitutions = computed_subs, + ) + + return struct( + interpreter = interpreter, + # Runfiles-relative path or absolute path + interpreter_actual_path = interpreter_actual_path, + files_without_interpreter = [pyvenv_cfg, pth, site_init], + ) + +def _map_each_identity(v): + return v + def _create_stage2_bootstrap( ctx, *, @@ -363,6 +462,13 @@ def _create_stage2_bootstrap( ) return output +def _runfiles_root_path(ctx, path): + # The ../ comes from short_path for files in other repos. + if path.startswith("../"): + return path[3:] + else: + return "{}/{}".format(ctx.workspace_name, path) + def _create_stage1_bootstrap( ctx, *, @@ -371,12 +477,24 @@ def _create_stage1_bootstrap( stage2_bootstrap = None, imports = None, is_for_zip, - runtime_details): + runtime_details, + venv = None): runtime = runtime_details.effective_runtime + if venv: + python_binary_path = _runfiles_root_path(ctx, venv.interpreter.short_path) + else: + python_binary_path = runtime_details.executable_interpreter_path + + if is_for_zip and venv: + python_binary_actual = _runfiles_root_path(ctx, venv.interpreter_actual_path) + else: + python_binary_actual = "" + subs = { "%is_zipfile%": "1" if is_for_zip else "0", - "%python_binary%": runtime_details.executable_interpreter_path, + "%python_binary%": python_binary_path, + "%python_binary_actual%": python_binary_actual, "%target%": str(ctx.label), "%workspace_name%": ctx.workspace_name, } @@ -447,6 +565,7 @@ def _create_windows_exe_launcher( ) def _create_zip_file(ctx, *, output, original_nonzip_executable, zip_main, runfiles): + """Create a Python zipapp (zip with __main__.py entry point).""" workspace_name = ctx.workspace_name legacy_external_runfiles = _py_builtins.get_legacy_external_runfiles(ctx) @@ -524,7 +643,14 @@ def _get_zip_runfiles_path(path, workspace_name, legacy_external_runfiles): zip_runfiles_path = paths.normalize("{}/{}".format(workspace_name, path)) return "{}/{}".format(_ZIP_RUNFILES_DIRECTORY_NAME, zip_runfiles_path) -def _create_executable_zip_file(ctx, *, output, zip_file, stage2_bootstrap, runtime_details): +def _create_executable_zip_file( + ctx, + *, + output, + zip_file, + stage2_bootstrap, + runtime_details, + venv): prelude = ctx.actions.declare_file( "{}_zip_prelude.sh".format(output.basename), sibling = output, @@ -536,6 +662,7 @@ def _create_executable_zip_file(ctx, *, output, zip_file, stage2_bootstrap, runt stage2_bootstrap = stage2_bootstrap, runtime_details = runtime_details, is_for_zip = True, + venv = venv, ) else: ctx.actions.write(prelude, "#!/usr/bin/env python3\n") diff --git a/python/private/py_runtime_info.bzl b/python/private/py_runtime_info.bzl index ff95c4a44..34be0db69 100644 --- a/python/private/py_runtime_info.bzl +++ b/python/private/py_runtime_info.bzl @@ -68,7 +68,8 @@ def _PyRuntimeInfo_init( interpreter_version_info = None, stage2_bootstrap_template = None, zip_main_template = None, - abi_flags = ""): + abi_flags = "", + site_init_template = None): if (interpreter_path and interpreter) or (not interpreter_path and not interpreter): fail("exactly one of interpreter or interpreter_path must be specified") @@ -117,6 +118,7 @@ def _PyRuntimeInfo_init( "interpreter_version_info": interpreter_version_info_struct_from_dict(interpreter_version_info), "pyc_tag": pyc_tag, "python_version": python_version, + "site_init_template": site_init_template, "stage2_bootstrap_template": stage2_bootstrap_template, "stub_shebang": stub_shebang, "zip_main_template": zip_main_template, @@ -126,6 +128,11 @@ PyRuntimeInfo, _unused_raw_py_runtime_info_ctor = define_bazel_6_provider( doc = """Contains information about a Python runtime, as returned by the `py_runtime` rule. +:::{warning} +This is an **unstable public** API. It may change more frequently and has weaker +compatibility guarantees. +::: + A Python runtime describes either a *platform runtime* or an *in-build runtime*. A platform runtime accesses a system-installed interpreter at a known path, whereas an in-build runtime points to a `File` that acts as the interpreter. In @@ -139,6 +146,9 @@ the same conventions as the standard CPython interpreter. :type: str The runtime's ABI flags, i.e. `sys.abiflags`. + +:::{versionadded} 0.41.0 +::: """, "bootstrap_template": """ :type: File @@ -160,7 +170,8 @@ is expected to behave and the substutitions performed. `%target%`, `%workspace_name`, `%coverage_tool%`, `%import_all%`, `%imports%`, `%main%`, `%shebang%` * `--bootstrap_impl=script` substititions: `%is_zipfile%`, `%python_binary%`, - `%target%`, `%workspace_name`, `%shebang%, `%stage2_bootstrap%` + `%python_binary_actual%`, `%target%`, `%workspace_name`, + `%shebang%`, `%stage2_bootstrap%` Substitution definitions: @@ -172,6 +183,19 @@ Substitution definitions: * An absolute path to a system interpreter (e.g. begins with `/`). * A runfiles-relative path to an interpreter (e.g. `somerepo/bin/python3`) * A program to search for on PATH, i.e. a word without spaces, e.g. `python3`. + + When `--bootstrap_impl=script` is used, this is always a runfiles-relative + path to a venv-based interpreter executable. + +* `%python_binary_actual%`: The path to the interpreter that + `%python_binary%` invokes. There are three types of paths: + * An absolute path to a system interpreter (e.g. begins with `/`). + * A runfiles-relative path to an interpreter (e.g. `somerepo/bin/python3`) + * A program to search for on PATH, i.e. a word without spaces, e.g. `python3`. + + Only set for zip builds with `--bootstrap_impl=script`; other builds will use + an empty string. + * `%workspace_name%`: The name of the workspace the target belongs to. * `%is_zipfile%`: The string `1` if this template is prepended to a zipfile to create a self-executable zip file. The string `0` otherwise. @@ -250,6 +274,15 @@ correctly. Indicates whether this runtime uses Python major version 2 or 3. Valid values are (only) `"PY2"` and `"PY3"`. +""", + "site_init_template": """ +:type: File + +The template to use for the binary-specific site-init hook run by the +interpreter at startup. + +:::{versionadded} 0.41.0 +::: """, "stage2_bootstrap_template": """ :type: File diff --git a/python/private/py_runtime_rule.bzl b/python/private/py_runtime_rule.bzl index 746cd19dc..5ce8161cf 100644 --- a/python/private/py_runtime_rule.bzl +++ b/python/private/py_runtime_rule.bzl @@ -129,6 +129,7 @@ def _py_runtime_impl(ctx): stage2_bootstrap_template = ctx.file.stage2_bootstrap_template, zip_main_template = ctx.file.zip_main_template, abi_flags = abi_flags, + site_init_template = ctx.file.site_init_template, )) if not IS_BAZEL_7_OR_HIGHER: @@ -316,6 +317,17 @@ However, in the future this attribute will be mandatory and have no default value. """, ), + "site_init_template": attr.label( + allow_single_file = True, + default = "//python/private:site_init_template", + doc = """ +The template to use for the binary-specific site-init hook run by the +interpreter at startup. + +:::{versionadded} 0.41.0 +::: +""", + ), "stage2_bootstrap_template": attr.label( default = "//python/private:stage2_bootstrap_template", allow_single_file = True, diff --git a/python/private/site_init_template.py b/python/private/site_init_template.py new file mode 100644 index 000000000..7a32210bf --- /dev/null +++ b/python/private/site_init_template.py @@ -0,0 +1,196 @@ +# Copyright 2024 The Bazel Authors. All rights reserved. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +"""site initialization logic for Bazel-built py_binary targets.""" +import os +import os.path +import sys + +# Colon-delimited string of runfiles-relative import paths to add +_IMPORTS_STR = "%imports%" +# Though the import all value is the correct literal, we quote it +# so this file is parsable by tools. +_IMPORT_ALL = "%import_all%" == "True" +_WORKSPACE_NAME = "%workspace_name%" +# runfiles-relative path to this file +_SELF_RUNFILES_RELATIVE_PATH = "%site_init_runfiles_path%" +# Runfiles-relative path to the coverage tool entry point, if any. +_COVERAGE_TOOL = "%coverage_tool%" + + +def _is_verbose(): + return bool(os.environ.get("RULES_PYTHON_BOOTSTRAP_VERBOSE")) + + +def _print_verbose_coverage(*args): + if os.environ.get("VERBOSE_COVERAGE") or _is_verbose(): + _print_verbose(*args) + + +def _print_verbose(*args, mapping=None, values=None): + if not _is_verbose(): + return + + print("bazel_site_init:", *args, file=sys.stderr, flush=True) + + +_print_verbose("imports_str:", _IMPORTS_STR) +_print_verbose("import_all:", _IMPORT_ALL) +_print_verbose("workspace_name:", _WORKSPACE_NAME) +_print_verbose("self_runfiles_path:", _SELF_RUNFILES_RELATIVE_PATH) +_print_verbose("coverage_tool:", _COVERAGE_TOOL) + + +def _find_runfiles_root(): + # Give preference to the environment variables + runfiles_dir = os.environ.get("RUNFILES_DIR", None) + if not runfiles_dir: + runfiles_manifest_file = os.environ.get("RUNFILES_MANIFEST_FILE", "") + if runfiles_manifest_file.endswith( + ".runfiles_manifest" + ) or runfiles_manifest_file.endswith(".runfiles/MANIFEST"): + runfiles_dir = runfiles_manifest_file[:-9] + + # Be defensive: the runfiles dir should contain ourselves. If it doesn't, + # then it must not be our runfiles directory. + if runfiles_dir and os.path.exists( + os.path.join(runfiles_dir, _SELF_RUNFILES_RELATIVE_PATH) + ): + return runfiles_dir + + num_dirs_to_runfiles_root = _SELF_RUNFILES_RELATIVE_PATH.count("/") + 1 + runfiles_root = os.path.dirname(__file__) + for _ in range(num_dirs_to_runfiles_root): + runfiles_root = os.path.dirname(runfiles_root) + return runfiles_root + + +_RUNFILES_ROOT = _find_runfiles_root() + +_print_verbose("runfiles_root:", _RUNFILES_ROOT) + + +def _is_windows(): + return os.name == "nt" + + +def _get_windows_path_with_unc_prefix(path): + path = path.strip() + # No need to add prefix for non-Windows platforms. + if not _is_windows() or sys.version_info[0] < 3: + return path + + # Starting in Windows 10, version 1607(OS build 14393), MAX_PATH limitations have been + # removed from common Win32 file and directory functions. + # Related doc: https://docs.microsoft.com/en-us/windows/win32/fileio/maximum-file-path-limitation?tabs=cmd#enable-long-paths-in-windows-10-version-1607-and-later + import platform + + if platform.win32_ver()[1] >= "10.0.14393": + return path + + # import sysconfig only now to maintain python 2.6 compatibility + import sysconfig + + if sysconfig.get_platform() == "mingw": + return path + + # Lets start the unicode fun + unicode_prefix = "\\\\?\\" + if path.startswith(unicode_prefix): + return path + + # os.path.abspath returns a normalized absolute path + return unicode_prefix + os.path.abspath(path) + + +def _search_path(name): + """Finds a file in a given search path.""" + search_path = os.getenv("PATH", os.defpath).split(os.pathsep) + for directory in search_path: + if directory: + path = os.path.join(directory, name) + if os.path.isfile(path) and os.access(path, os.X_OK): + return path + return None + + +def _setup_sys_path(): + seen = set(sys.path) + python_path_entries = [] + + def _maybe_add_path(path): + if path in seen: + return + path = _get_windows_path_with_unc_prefix(path) + if _is_windows(): + path = path.replace("/", os.sep) + + _print_verbose("append sys.path:", path) + sys.path.append(path) + seen.add(path) + + for rel_path in _IMPORTS_STR.split(":"): + abs_path = os.path.join(_RUNFILES_ROOT, rel_path) + _maybe_add_path(abs_path) + + if _IMPORT_ALL: + repo_dirs = sorted( + os.path.join(_RUNFILES_ROOT, d) for d in os.listdir(_RUNFILES_ROOT) + ) + for d in repo_dirs: + if os.path.isdir(d): + _maybe_add_path(d) + else: + _maybe_add_path(os.path.join(_RUNFILES_ROOT, _WORKSPACE_NAME)) + + # COVERAGE_DIR is set if coverage is enabled and instrumentation is configured + # for something, though it could be another program executing this one or + # one executed by this one (e.g. an extension module). + # NOTE: Coverage is added last to allow user dependencies to override it. + coverage_setup = False + if os.environ.get("COVERAGE_DIR"): + cov_tool = _COVERAGE_TOOL + if cov_tool: + _print_verbose_coverage(f"Using toolchain coverage_tool {cov_tool}") + elif cov_tool := os.environ.get("PYTHON_COVERAGE"): + _print_verbose_coverage(f"PYTHON_COVERAGE: {cov_tool}") + + if cov_tool: + if os.path.isabs(cov_tool): + pass + elif os.sep in os.path.normpath(cov_tool): + cov_tool = os.path.join(_RUNFILES_ROOT, cov_tool) + else: + cov_tool = _search_path(cov_tool) + if cov_tool: + # The coverage entry point is `