roll: pigweed, pw_toolchain: Revert "bazel: Use Python toolchain in custom rules"

This reverts commit a17b318ce670eaed29d3fa7ee819929e737ba589.

Reason for revert: Collides with http://pwrev.dev/204199 causing a breakage.

Original change's description:
> bazel: Use Python toolchain in custom rules
>
> This will make the bzlmod transition smoother (by removing the @python3
> reference: in the bzlmod version of rules_python this repo doesn't exist
> any more). The Python toolchain is the right way to access the
> interpreter anyway.
>
> Bug: 258836641
> Change-Id: I0bf515d13f105c421e6ceab0d4b9d29d243cd04d
> Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/224272
> Reviewed-by: Austin Foxley <afoxley@google.com>
> Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
> Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
> Pigweed-Auto-Submit: Ted Pudlik <tpudlik@google.com>
> Commit-Queue: Auto-Submit <auto-submit@pigweed-service-accounts.iam.gserviceaccount.com>

TBR=pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com,afoxley@google.com,tpudlik@google.com,android-build-ayeaye@system.gserviceaccount.com,auto-submit@pigweed-service-accounts.iam.gserviceaccount.com

Original-Bug: 258836641
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/224277

https://pigweed.googlesource.com/pigweed/pigweed
pigweed, pw_toolchain Rolled-Commits: 643065036063709..5e8ba3ccc03f4ea
Roller-URL: https://ci.chromium.org/b/8742041878883744369
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ia52c0efa868fab9d0ef0426814396914bbcb4ce1
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/224412
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
1 file changed
tree: 075f9662cd340bca3c7ebf56829fef5c45d0f78d
  1. .github/
  2. src/
  3. targets/
  4. tools/
  5. .bazelignore
  6. .bazelrc
  7. .bazelversion
  8. .gitignore
  9. BUILD.bazel
  10. echo.bzl
  11. LICENSE
  12. pigweed.json
  13. README.md
  14. requirements.in
  15. requirements_lock.txt
  16. WORKSPACE
README.md

Pigweed: minimal Bazel example

This repository contains a minimal example of a Bazel-based Pigweed project. It's an echo application for the STM32F429 Discovery Board.

Cloning

git clone --recursive https://pigweed.googlesource.com/pigweed/quickstart/bazel

If you already cloned but forgot to include --recursive, run git submodule update --init to pull all submodules.

TODO: b/300695111 - Don't require submodules for this example.

Building

We‘ll assume you already have Bazel on your system. If you don’t, the recommended way to get it is through Bazelisk.

To build the entire project (including building the application for both the host and the STM32 Discovery Board), run

bazel build //...

To run the application locally on your machine, run,

bazel run //src:echo

Flashing

To flash the firmware to a STM32F429 Discovery Board connected to your machine, run,

bazel run //tools:flash

Note that you don't need to build the firmware first: Bazel knows that the firmware images are needed to flash the board, and will build them for you. And if you edit the source of the firmware or any of its dependencies, it will get rebuilt when you flash.

Communicating

Run,

bazel run //tools:miniterm -- /dev/ttyACM0 --filter=debug

to communicate with the board. When you transmit a character, you should get the same character back!