Improve the build process for Homebrew

[nickstenning]

We've recently run into issues where Homebrew's build process for cog doesn't match the build process we use for our own binaries.

This commit makes changes to our build process that will hopefully allow us to update Homebrew to use our Makefile to run its builds.

1. Use python -m pip wheel to build the wheel rather than relying on a manual pip install -e .[dev] and python -m build.

2. Allow COG_VERSION_OVERRIDE and COG_COMMIT_OVERRIDE to specify the version and commit values used by goreleaser.

3. Set the -trimpath flag for go build so we don't capture directory names from the Homebrew build process or GitHub Actions.

[meatballhat]

🤩

[nickstenning]

Marking this as draft for now because while this works (with the following cog.rb) for brew install cog --HEAD, it's not going to work for bottle builds because make cog uses a snapshot build with goreleaser. I think we'll need to figure out how to do release builds through the Makefile, or at least how to do a full release build when needed.

cog.rb

class Cog < Formula
  desc "Containers for machine learning"
  homepage "https://cog.run/"
  url "https://github.com/replicate/cog/archive/refs/tags/v0.9.26.tar.gz"
  sha256 "46ae16f928c8591622c8c61c44bce029a9a5202b5d65609ce505686d935f4e08"
  license "Apache-2.0"
  head "https://github.com/replicate/cog.git", branch: "homebrew-friendly-build"

  bottle do
    sha256 cellar: :any_skip_relocation, arm64_sequoia: "d3343952291b3eee0656ba53c3f4a9342432071fc1701f03054a5e5d4afe1f20"
    sha256 cellar: :any_skip_relocation, arm64_sonoma:  "d3343952291b3eee0656ba53c3f4a9342432071fc1701f03054a5e5d4afe1f20"
    sha256 cellar: :any_skip_relocation, arm64_ventura: "d3343952291b3eee0656ba53c3f4a9342432071fc1701f03054a5e5d4afe1f20"
    sha256 cellar: :any_skip_relocation, sonoma:        "056ca086a31900b35b9e0517483cad9da89665d5f3250a8f628191bbaf96dc39"
    sha256 cellar: :any_skip_relocation, ventura:       "056ca086a31900b35b9e0517483cad9da89665d5f3250a8f628191bbaf96dc39"
    sha256 cellar: :any_skip_relocation, x86_64_linux:  "727ce1d0bcb33af40b10b67a6750b3994fc24ab29fa4cc75f5873d6bd2e01efe"
  end

  depends_on "go" => :build
  depends_on "python@3.12" => :build

  conflicts_with "cocogitto", because: "both install `cog` binaries"

  def install
    python3 = "python3.12"

    # If we're building --HEAD then we'll have the git metadata that eliminates
    # the need for these overrides.
    if !build.head?
      ENV["COG_VERSION_OVERRIDE"] = version
      ENV["COG_COMMIT_OVERRIDE"] = tap.user
    end

    system "make", "cog", "PYTHON=#{python3}"
    bin.install "cog"

    generate_completions_from_executable(bin/"cog", "completion")
  end

  test do
    system bin/"cog", "init"
    assert_match "Configuration for Cog", (testpath/"cog.yaml").read

    assert_match "cog version #{version}", shell_output("#{bin}/cog --version")
  end
end