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fix(uv): fix UV_BIN usage with current_toolchain (bazelbuild#2074)
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Before this PR the `uv` toolchain could not be used in a `genrule` it
seems because the `//python/uv:toolchain` does not have the necessary
providers for using the make variables and the re-exporting of the make
variables from the `toolchain` in the `current_toolchain` rule did not
seem to work.

This PR removes the provider construction in the `toolchain` and does
that only in the `current_toolchain`. This better mirrors how the Python
toolchains are setup (grepping `PYTHON3` is sufficient to get examples).
This also splits out work done in bazelbuild#2059 to decrease its scope, so that
this can be discussed separately.

Work towards bazelbuild#1975
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aignas committed Jul 19, 2024
1 parent 6e9a65f commit bd0ca99
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4 changes: 2 additions & 2 deletions .bazelrc
Original file line number Diff line number Diff line change
Expand Up @@ -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_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,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,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

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14 changes: 14 additions & 0 deletions MODULE.bazel
Original file line number Diff line number Diff line change
Expand Up @@ -130,3 +130,17 @@ use_repo(
"build_bazel_bazel_rolling",
"build_bazel_bazel_self",
)

# EXPERIMENTAL: This is experimental and may be removed without notice
uv = use_extension(
"//python/uv:extensions.bzl",
"uv",
dev_dependency = True,
)
uv.toolchain(uv_version = "0.2.23")
use_repo(uv, "uv_toolchains")

register_toolchains(
"@uv_toolchains//:all",
dev_dependency = True,
)
5 changes: 4 additions & 1 deletion python/uv/BUILD.bazel
Original file line number Diff line number Diff line change
Expand Up @@ -41,7 +41,10 @@ current_toolchain(
# even if no toolchain is registered.
tags = ["manual"],
# EXPERIMENTAL: Visibility is restricted to allow for changes.
visibility = ["@rules_python//examples:__subpackages__"],
visibility = [
"//:__subpackages__",
"@rules_python//examples:__subpackages__",
],
)

bzl_library(
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10 changes: 8 additions & 2 deletions python/uv/private/current_toolchain.bzl
Original file line number Diff line number Diff line change
Expand Up @@ -30,7 +30,9 @@ def _current_toolchain_impl(ctx):
# Bazel requires executable rules to create the executable themselves,
# so we create a symlink in this rule so that it appears this rule created its executable.
original_uv_executable = toolchain_info.uv_toolchain_info.uv[DefaultInfo].files_to_run.executable
symlink_uv_executable = ctx.actions.declare_file("uv_symlink_{}".format(original_uv_executable.basename))

# Use `uv` as the name of the binary to make the help message well formatted
symlink_uv_executable = ctx.actions.declare_file("current_toolchain/uv".format(original_uv_executable.basename))
ctx.actions.symlink(output = symlink_uv_executable, target_file = original_uv_executable)

new_default_info = DefaultInfo(
Expand All @@ -39,10 +41,14 @@ def _current_toolchain_impl(ctx):
executable = symlink_uv_executable,
)

template_variable_info = platform_common.TemplateVariableInfo({
"UV_BIN": symlink_uv_executable.path,
})

return [
toolchain_info,
new_default_info,
toolchain_info.template_variable_info,
template_variable_info,
toolchain_info.uv_toolchain_info,
]

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5 changes: 0 additions & 5 deletions python/uv/toolchain.bzl
Original file line number Diff line number Diff line change
Expand Up @@ -31,21 +31,16 @@ def _uv_toolchain_impl(ctx):
uv = uv,
version = ctx.attr.version,
)
template_variable_info = platform_common.TemplateVariableInfo({
"UV_BIN": uv[DefaultInfo].files_to_run.executable.path,
})

# Export all the providers inside our ToolchainInfo
# so the current_toolchain rule can grab and re-export them.
toolchain_info = platform_common.ToolchainInfo(
default_info = default_info,
template_variable_info = template_variable_info,
uv_toolchain_info = uv_toolchain_info,
)
return [
default_info,
toolchain_info,
template_variable_info,
]

uv_toolchain = rule(
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22 changes: 22 additions & 0 deletions tests/uv/toolchain/BUILD.bazel
Original file line number Diff line number Diff line change
@@ -0,0 +1,22 @@
load("//python:py_test.bzl", "py_test")
load("//python/private:bzlmod_enabled.bzl", "BZLMOD_ENABLED") # buildifier: disable=bzl-visibility

# We only test this feature when `bzlmod` is enabled.
_TARGET_COMPATIBLE_WITH = [] if BZLMOD_ENABLED else ["@platforms//:incompatible"]

genrule(
name = "uv_help",
outs = ["uv_help.txt"],
cmd = "$(UV_BIN) --python-fetch manual --help >$@",
target_compatible_with = _TARGET_COMPATIBLE_WITH,
toolchains = ["//python/uv:current_toolchain"],
)

py_test(
name = "uv_help_test",
srcs = ["uv_help_test.py"],
data = [":uv_help"],
env = {"DATA": "$(rlocationpath :uv_help)"},
target_compatible_with = _TARGET_COMPATIBLE_WITH,
deps = ["//python/runfiles"],
)
27 changes: 27 additions & 0 deletions tests/uv/toolchain/uv_help_test.py
Original file line number Diff line number Diff line change
@@ -0,0 +1,27 @@
#!/usr/bin/env python

import os
import unittest
from pathlib import Path

from python.runfiles import runfiles


class TestUV(unittest.TestCase):
def test_uv_help(self):
rfiles = runfiles.Create()
assert rfiles is not None, "rfiles creation failed"

data_rpath = os.environ["DATA"]
uv_help_path = rfiles.Rlocation(data_rpath)
assert (
uv_help_path is not None
), f"the rlocation path was not found: {data_rpath}"

uv_help = Path(uv_help_path).read_text()

self.assertIn("Usage: uv [OPTIONS] <COMMAND>", uv_help)


if __name__ == "__main__":
unittest.main()

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