//python:py_exec_tools_toolchain.bzl

Toolchain for build-time tools.

rulepy_exec_tools_toolchain(name,exec_interpreter='@rules_python//python/private:current_interpreter_executable',precompiler=None)

Provides a toolchain for build time tools.

This providesToolchainInfo with the following attributes:

• exec_tools:PyExecToolsInfo

• toolchain_label:Labelonly present when--visibile_for_testing=Truefor internal testing. The rule’s label; this allows identifying what toolchainimplmentation was selected for testing purposes.

Attributes:

• name –(Name)

  A unique name for this target.

  mandatory

• exec_interpreter –(label)(default“@rules_python//python/private:current_interpreter_executable”)

  An interpreter that is directly usable in the exec configuration

  If not specified, the interpreter from//python:toolchain_type willbe used.

  To disable, specify the special target//python:none; the raw valueNonewill use the default.

  Note

  This is only useful forctx.actions.run calls thatdirectly invoke theinterpreter, which is fairly uncommon and low level. It is better to use acfg="exec" attribute that points to apy_binary rule instead, which willhandle all the necessary transitions and runtime setup to invoke a program.

  SeePyExecToolsInfo.exec_interpreter for further docs.

  Changed in version 1.4.0:From now on the provided target also needs to provideplatform_common.ToolchainInfoso that the toolchainpy_runtime field can be correctly forwarded.

  optional

  Required providers:[DefaultInfo,ToolchainInfo]

• precompiler –(label)(defaultNone)

  SeePyExecToolsInfo.precompiler

  optional