roll: third_party/pigweed pw_channel: Rework inheritance to avoid SiblingCast

Change pw_channel to a new inheritance pattern that places AnyChannel in
the middle of the hierarchy. The various Channel API classes are private
empty bases of AnyChannel. This ensures conversions between compatible
Channel variants are valid, since all channel implementations have all
channel variants as bases. Channel implementations extend a ChannelImpl
with properties specified in template parameters, and unsupported
functions are automatically disabled.

This change also refactors and simplifies the channel.h header.
Properties and code for checking them are moved to a properties.h
header. Also, the macros to generate ChannelImpl specializations are
greatly simplified.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/247732
Original-Revision: 0422de1761e52ad5d1fad821880025fc27facf1c

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: c521eeca9d3860..0422de1761e52a
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8731489287627470897
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I9a5ac1d4db76eb434ae07a9445fd419f35635571
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/248099
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
1 file changed
tree: 845be69a100ec95bf235267c1040fb612a5cd225
  1. build_overrides/
  2. docs/
  3. examples/
  4. images/
  5. infra/
  6. libraries/
  7. targets/
  8. third_party/
  9. tools/
  10. .bazelignore
  11. .bazelrc
  12. .bazelversion
  13. .gitattributes
  14. .gitignore
  15. .gitmodules
  16. .gn
  17. .pw_console.yaml
  18. activate.bat
  19. banner.txt
  20. bootstrap.bat
  21. bootstrap.sh
  22. BUILD.bazel
  23. BUILD.gn
  24. BUILDCONFIG.gn
  25. LICENSE
  26. MODULE.bazel
  27. navbar.md
  28. OWNERS
  29. pigweed.json
  30. pyproject.toml
  31. README.md
README.md

Pigweed Sample Project

This repository outlines the recommended way of using Pigweed in a new or existing project. Feel free to fork this repository, or read it as a reference.

For more information see the Pigweed Getting started guide.

Check back for more complex examples and features coming soon!

Getting started

Make sure you've set up Pigweed's prerequisites.

If you're on Windows, you can automate the initial setup by downloading the first-time setup script from cmd.exe:

curl https://pigweed.googlesource.com/pigweed/sample_project/+/main/tools/setup_windows_prerequisites.bat?format=TEXT > setup_pigweed_prerequisites.b64 && certutil -decode -f setup_pigweed_prerequisites.b64 setup_pigweed_prerequisites.bat && del setup_pigweed_prerequisites.b64

Then you can run the script with the following command in cmd.exe:

setup_pigweed_prerequisites.bat

Note: You may see a few UAC prompts as the script installs Git, Python, and enables developer mode.

Once that is done, you can clone this project with the following command:

git clone https://pigweed.googlesource.com/pigweed/sample_project

Environment setup

Pigweed uses a local development environment for most of its tools. This means tools are not installed to your machine, and are instead stored in a directory inside your project (Note: git ignores this directory). The tools are temporarily added to the PATH of the current shell session.

To make sure the latest tooling has been fetched and set up, run the bootstrap command for your operating system:

Windows

bootstrap.bat

Linux & Mac

source ./bootstrap.sh

After tooling updates, you might need to run bootstrap again to ensure the latest tools.

After the initial bootstrap, you can use use the activate scripts to configure the current shell for development without doing a full update.

Windows

activate.bat

Linux & Mac

source ./activate.sh

Building

All of these commands must be run from inside an activated developer environment. See Environment setup

One-shot build

To build the project, documentation, and tests, run the following command in an activated environment:

pw build

Automatically build on file save

Alternatively, if you'd like an automatic rebuild to trigger whenever you save changes to files, use pw watch:

pw watch

Typical workflow

When you pull latest repository changes, run bootstrap:

source ./bootstrap.sh

If you're just launching a new shell session, you can activate instead:

source ./activate.sh

and rebuild with:

pw build

More info and Examples

Extended documentation and examples are built along code changes. You can view them at out/gn/docs/gen/docs/html/index.html.