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pigweed / pigweed / examples / d7f4f767035a93c870b1df5d2194c1efd76a5864
commitd7f4f767035a93c870b1df5d2194c1efd76a5864[log] [tgz]
authorAlexei Frolov <frolv@pigweed.infra.roller.google.com>Wed Jul 16 17:49:43 2025 -0700
committerCQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>Wed Jul 16 17:49:43 2025 -0700
tree944ba29363615fb9be69d931153cd0a9c35cd0b9
parent26baef97fa15ba59875b696a3c3397d7ab2377fd [diff]
roll: third_party/pigweed pw_multibuf: Add TruncateTopLayer()

This adds a `TruncateTopLayer` function to MultiBuf v2 which changes
the size of the top layer while maintaining its offset into the layer
below.

This allows users of MultiBuf to shrink the buffer to the size of the
data they populated without having to know how much space is reserved
in front of that data by the underlying layer.

Original-Bug: 432038569
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/304790
Copybara-Verified: Copybara Prod <copybara-worker-blackhole@google.com>
Original-Revision: 6e82f7d7aa3d6be0550e3fae8c7e262b80ba572f

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 174bd6040bedd5..6e82f7d7aa3d6b
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8709141256594891601
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Id31bcb4e13686e3e58f33b472c90910cc3e222e3
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/305655
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
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: 944ba29363615fb9be69d931153cd0a9c35cd0b9
  1. build_overrides/
  2. docs/
  3. examples/
  4. images/
  5. infra/
  6. libraries/
  7. targets/
  8. third_party/
  9. tools/
  10. .clang-format ⇨ third_party/pigweed/.clang-format
  11. activate.sh ⇨ bootstrap.sh
  12. .bazelignore
  13. .bazelrc
  14. .bazelversion
  15. .clang-tidy
  16. .gitattributes
  17. .gitignore
  18. .gitmodules
  19. .gn
  20. .pw_console.yaml
  21. activate.bat
  22. banner.txt
  23. bootstrap.bat
  24. bootstrap.sh
  25. BUILD.bazel
  26. BUILD.gn
  27. BUILDCONFIG.gn
  28. LICENSE
  29. MODULE.bazel
  30. navbar.md
  31. OWNERS
  32. pigweed.json
  33. pyproject.toml
  34. 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.