Skip to content

Instantly share code, notes, and snippets.

View rrbutani's full-sized avatar
🌴
Back on June 24th

Rahul Butani rrbutani

🌴
Back on June 24th
61 followers · 500 following
  • 12:22 (UTC -07:00)
View GitHub Profile
@rrbutani
rrbutani / ..bazel-toolchain-bootstrapping.md
Last active June 3, 2024 21:45

Prototypes a stage-based toolchain bootstrap with transitions using "quux-lang" — a fictitious language — as an example.

❯ bazel cquery 'filter("^//:*", deps(:foo) - filter("//:_quux_toolchain_current_bootstrap_stage_is_[0-9]*", //:*)) - //:defs.bzl - //:toolchain - //:quux_toolchain_type' --output=graph > out.dot

@rrbutani
rrbutani / ..bazel-range-setting.md
Last active June 3, 2024 09:40

bazel query 'filter("^_version_is_at_.*$", ...) + true + false' --output=graph

flowchart TD
  classDef true stroke:#1F0
  classDef false stroke:#F00
  classDef m stroke:#F90
  classDef l stroke:#C0F
@rrbutani
rrbutani / ..double_exec_transition
Last active May 23, 2024 21:30
bazel double exec transition test
.
@rrbutani
rrbutani / eggnogg-flake.nix
Created January 1, 2024 05:30
eggnogg
{
inputs = {
nixpkgs.url = github:NixOS/nixpkgs/nixos-unstable;
flake-utils.url = github:numtide/flake-utils;
};
outputs = { nixpkgs, flake-utils, self }: flake-utils.lib.eachDefaultSystem (system: let
np = nixpkgs.legacyPackages.${system};
inherit (np) lib;
# TODO: macOS..
@rrbutani
rrbutani / .bazel-patchelf-rules
Created September 12, 2023 06:32
Rules for invoking patchelf in Bazel
@rrbutani
rrbutani / .bazel-toolchain-transitions.md
Last active October 28, 2023 22:32
.bazel-toolchain-transitions

September 5th, 2023

having a bit of a crisis

runfiles are broken

using platforms to model build environments is broken because of how strategies interact with platforms

bzlmod is conceptually pretty excellent but still has tons of warts and weird limitations that require lots of creative workarounds

@rrbutani
rrbutani / get_sibling_repo_name_in_module_extension.bzl
Last active September 5, 2023 04:47
Workaround for https://github.com/bazelbuild/bazel/issues/19055
"""Workarounds for https://github.com/bazelbuild/bazel/issues/19055."""
# TODO(build, bazel, blzmod): if new APIs are introduced resolving this issue:
# https://github.com/bazelbuild/bazel/issues/19055, use them in lieu of this
# function.
def get_sibling_repo_in_module_extension(rctx, repo_name):
"""Gets the _canonical_ name for a sibling repo in the module extension.
## Background
@rrbutani
rrbutani / starlark_new_local_repository.bzl
Created August 28, 2023 03:40
starlark_new_local_repository.bzl
"""Starlark version of `new_local_repository` for module extensions.
Currently `native.new_local_repository` cannot be called from Bazel module
extensions: https://github.com/bazelbuild/bazel/issues/15412
The plan is to eventually "starlark-ify" this rule:
- https://docs.google.com/document/d/17RZKMuMjAIgNfFdrsLhqNsMTQDSS-BBA-S-fCSBPV7M/edit
- https://github.com/bazelbuild/bazel/issues/18285
In the interim we've got our own Starlark-native `new_local_repository`
@rrbutani
rrbutani / .bazel-spawn-strategy-selection-for-non-host-exec-platform
Last active September 2, 2023 04:45
Bazel spawn strategy selection for non-host exec platforms
We couldn’t find that file to show.
@rrbutani
rrbutani / ..bazel-host-paths-experiment
Last active August 30, 2023 09:34
Meant to be used together with this Bazel fork:
- https://github.com/rrbutani/bazel/compare/70fc57d29ce21204f28f8462627badbd5b750787...b8553d4fcf157acddbac855a3945c74d0f962c27