Re: contrib/bazel interest check

On 2026-01-05 at 15:34:45, Son Luong Ngoc wrote:

  Hi folks,

  For my personal use case, I have bootstrapped building libgit and git
  using Bazel, an open-sourced build tool by Google (1).  Currently, the
  code is squashed into a giant commit (2) in my repo at
  github.com/sluongng/git in the branch sluongng/next-bazel.  The commit
  is based on the 'next' branch from upstream.

  Similar to Meson, Bazel requires fine-grained BUILD files to be
  sprinkled throughout the repo.  So it's fairly invasive to try to get
  this merged.

  I also won't have the capacity to maintain this setup for every new
  upstream topic that comes up.  Though I am willing to spend the effort
  to maintain it for major releases.

  I want to send this as an interest check to see if there are folks who
  are willing to co-maintain this with me in-tree style inside git.git.
  Otherwise, I plan to send this to the Bazel Central Registry (3), the
  public package registry for the Bazel ecosystem, in overlay mode.  The
  overlay shall be applied on top of the checkout copy before Bazel
  starts the build.

We already have two officially supported build systems (Make and Meson),
plus CMake in contrib.  I don't think adding a fourth build system would
be a good idea, especially since it's already burdensome enough to deal
with the main two.

I'd also like to encourage you not to send this as-is to the Bazel
Central Registry, since it hard-codes various values that are intended
to be configurable, such as `SHELL_PATH`[0], `PERL_PATH`, and
`PYTHON_PATH`.  It also hard-codes a variety of define values which are
not necessarily correct for all systems (for instance, my Debian
unstable system _does_ have `strlcpy`).  Shipping a build system like
this would be a regression in functionality and result in broken
packages on a variety of systems[1].  If you're suggesting to the public
that this is an appropriate way to build Git in general, it would be
nice if it were no less functional and flexible than our existing build
system.

[0] For instance, I set `SHELL_PATH` to test building and running Git
against zsh from time to time.
[1] As an example, this would not work correctly on the version of Git
a previous employer ships because they ship their own version of Perl
and Python that should be used instead of the system one.
-- 
brian m. carlson (they/them)
Toronto, Ontario, CA