Common useful functions for writing BUILD files and Starlark macros/rules
Go to file
Justin Pinkul ad48c0d855
fix: moving the preserve mtime test logic to Go for portability (#908)
* Fix: Moving the preserve mtiem test logic to Go for portability

* add tags to disable remote caching, execution and force the test to always re-run

* include docs

* use the runfiles library for windows compatability

* mark the test as manual

* remove duplicate word in comment

* chore: reduce duplication of the long caveats text

---------

Co-authored-by: Alex Eagle <alex@aspect.dev>
2024-09-17 17:25:26 -07:00
.aspect chore: update git urls (#926) 2024-09-17 17:05:35 -07:00
.bcr chore: bump buildifier, go and gazelle deps (#845) 2024-05-13 23:30:19 -07:00
.github/workflows chore: update git urls (#926) 2024-09-17 17:05:35 -07:00
docs fix: moving the preserve mtime test logic to Go for portability (#908) 2024-09-17 17:25:26 -07:00
e2e fix: moving the preserve mtime test logic to Go for portability (#908) 2024-09-17 17:25:26 -07:00
lib fix: moving the preserve mtime test logic to Go for portability (#908) 2024-09-17 17:25:26 -07:00
platforms chore: cleanup before bazel-contrib handoff (#918) 2024-09-02 09:32:38 -07:00
shlib chore: right size tests to supress bazel warning (#913) 2024-08-19 15:55:21 -07:00
tools chore: update git urls (#926) 2024-09-17 17:05:35 -07:00
.bazelignore chore: turn on more basic precommit checks 2023-02-17 11:00:00 -08:00
.bazeliskrc chore: cleanup before bazel-contrib handoff (#918) 2024-09-02 09:32:38 -07:00
.bazelrc chore: add --check_direct_dependencies to .bazelrc (#864) 2024-06-07 11:49:45 -07:00
.bazelversion chore: bump to Bazel 7.3.1 (#914) 2024-08-20 13:37:52 -04:00
.editorconfig chore: bazel run //:format (#682) 2023-12-08 00:30:39 -08:00
.gitattributes fix(typos): Fix almost all typos with hook (#884) 2024-07-31 10:09:17 -04:00
.gitignore chore: align ci patterns (#843) 2024-05-13 23:51:10 -07:00
.pre-commit-config.yaml chore: enable go, shell, yaml formatters and bazel run //:format (#917) 2024-08-20 11:56:40 -07:00
.prettierignore chore: upgrade to Aspect Workflows 5.9.0-rc.15 (#722) 2024-01-13 13:38:51 -08:00
.shellcheckrc chore: cleanup before bazel-contrib handoff (#918) 2024-09-02 09:32:38 -07:00
.typos.toml fix(typos): Fix almost all typos with hook (#884) 2024-07-31 10:09:17 -04:00
.vale.ini chore: cleanup before bazel-contrib handoff (#918) 2024-09-02 09:32:38 -07:00
BUILD.bazel chore: update git urls (#926) 2024-09-17 17:05:35 -07:00
CONTRIBUTING.md chore: cleanup before bazel-contrib handoff (#918) 2024-09-02 09:32:38 -07:00
LICENSE chore: turn on more basic precommit checks 2023-02-17 11:00:00 -08:00
MODULE.bazel chore: cleanup before bazel-contrib handoff (#918) 2024-09-02 09:32:38 -07:00
README.md chore: update git urls (#926) 2024-09-17 17:05:35 -07:00
WORKSPACE.bazel chore: cleanup before bazel-contrib handoff (#918) 2024-09-02 09:32:38 -07:00
deps.bzl chore: cleanup before bazel-contrib handoff (#918) 2024-09-02 09:32:38 -07:00
go.mod chore: update git urls (#926) 2024-09-17 17:05:35 -07:00
go.sum fix(deps): update golang.org/x/exp digest to 9b4947d (#923) 2024-09-02 15:39:17 -07:00
renovate.json Update renovate.json (#572) 2024-02-26 17:39:52 -08:00
yamlfmt.yaml chore: enable go, shell, yaml formatters and bazel run //:format (#917) 2024-08-20 11:56:40 -07:00

README.md

Bazel helpers library

Base Starlark libraries and basic Bazel rules which are useful for constructing rulesets and BUILD files.

This module depends on bazel-skylib. In theory all these utilities could be upstreamed to bazel-skylib, but the declared scope of that project is narrow and it's very difficult to get anyone's attention to review PRs there.

Installation

Installation instructions are included on each release: https://github.com/bazel-contrib/bazel-lib/releases

To use a commit rather than a release, you can point at any SHA of the repo.

For example to use commit abc123:

  1. Replace url = "https://github.com/bazel-contrib/bazel-lib/releases/download/v0.1.0/bazel-lib-v0.1.0.tar.gz" with a GitHub-provided source archive like url = "https://github.com/bazel-contrib/bazel-lib/archive/abc123.tar.gz"
  2. Replace strip_prefix = "bazel-lib-0.1.0" with strip_prefix = "bazel-lib-abc123"
  3. Update the sha256. The easiest way to do this is to comment out the line, then Bazel will print a message with the correct value.

Note that GitHub source archives don't have a strong guarantee on the sha256 stability, see https://github.blog/2023-02-21-update-on-the-future-stability-of-source-code-archives-and-hashes

Public API

Copying files

  • copy_directory Copies directories to another package.
  • copy_file Copies files to another package.
  • copy_to_bin Copies a source file to output tree at the same workspace-relative path.
  • copy_to_directory Copies and arranges files and directories into a new directory.
  • write_source_files Write to one or more files or folders in the source tree. Stamp out tests that ensure the sources exist and are up to date.

Transforming files

  • jq A toolchain and custom rule for running jq, a tool that is "like sed for json".
  • yq A toolchain and custom rule for running yq, a "YAML, JSON and XML processor".

Manipulating paths

  • directory_path Provide a label to reference some path within a directory, via DirectoryPathInfo.
  • output_files Forwards a subset of the files (via the DefaultInfo provider) from a given target's DefaultInfo or OutputGroupInfo.

Writing rules

  • expand_make_vars Perform make variable and location substitutions in strings..
  • expand_template Substitute templates with make variables, location resolves, stamp variables, and arbitrary strings.
  • paths Useful path resolution methods.
  • transitions Transition sources to a provided platform.
  • lists Functional-style helpers for working with list data structures.
  • utils Various utils for labels and globs.
  • params_file Generate encoded params file from a list of arguments.
  • repo_utils Useful methods for repository rule implementations.
  • run_binary Like skylib's run_binary but adds directory output support.
  • stamping Support version stamping in custom rules.
  • base64 Starlark Base64 encoder & decoder.

Testing

Generating documentation

  • docs Rules for generating docs and stamping tests to ensure they are up to date.