Add graphviz to Homebrew brews list

[shunkakinoki]

Include graphviz in the list of available Homebrew brews.

---

Summary by cubic

Added graphviz to the nix-darwin Homebrew brews list so DOT diagram rendering is available by default on macOS dev machines.

^{Written for commit 3e86e00. Summary will update automatically on new commits.}

[gemini-code-assist]

Summary of Changes

Hello @shunkakinoki, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request integrates the graphviz utility into the Homebrew package list within the nix-darwin configuration. This change ensures that graphviz is automatically provisioned for users leveraging this specific Homebrew setup, streamlining the availability of this powerful graph visualization tool.

Highlights

• Homebrew Package Addition: The graphviz package has been added to the list of Homebrew brews managed by the nix-darwin configuration.

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[coderabbitai]

📝 Walkthrough

Summary by CodeRabbit

• Chores
  • Added graphviz to the system package installation list, expanding available tools in the development environment.

Walkthrough

The change adds the "graphviz" package to the homebrew package list in the nix-darwin configuration. This is a single-line addition to the existing brews attribute, enabling graphviz installation when the system configuration is applied.

Changes

Cohort / File(s)	Summary
Homebrew package addition nix-darwin/config/homebrew.nix	Added "graphviz" to the homebrew.brews list

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A diagram tool joins the brew,
Graphviz adds a graph or two,
In Darwin's home, it now will stay,
Visualizing the config way! ✨

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title directly and clearly describes the main change: adding graphviz to the Homebrew brews list, matching the primary modification in the changeset.
Description check	✅ Passed	The description is related to the changeset, explaining the purpose of adding graphviz to enable DOT diagram rendering on macOS development machines.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch chore-add-graphviz

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[gemini-code-assist]

Code Review

This pull request adds graphviz to the list of Homebrew packages. The change is straightforward and correctly maintains the alphabetical sorting of the package list. I have no further feedback.

[Copilot]

Pull Request Overview

This PR adds the graphviz package to the list of Homebrew brews managed by nix-darwin configuration. Graphviz is a graph visualization software toolkit commonly used for rendering diagrams and network graphs.

Key Changes

• Added "graphviz" entry to the homebrew.nix brews list in alphabetical order

---

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[coderabbitai]

Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

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You can enable these sources in your CodeRabbit configuration.

📥 Commits

Reviewing files that changed from the base of the PR and between 6e20b50 and 3e86e00.

📒 Files selected for processing (1)

• nix-darwin/config/homebrew.nix (1 hunks)

🧰 Additional context used

📓 Path-based instructions (2)

**/*.nix

📄 CodeRabbit inference engine (CLAUDE.md)

Format all Nix files with nixfmt

**/*.nix: Nix: Use 2 spaces for indentation
Nix: Keep line length under 100 characters
Nix: Sort attribute sets alphabetically
Nix: Use consistent spacing around operators
Nix: Format lists and sets consistently

Follow the Nix expression language style guide

Files:

• nix-darwin/config/homebrew.nix

nix-darwin/**

📄 CodeRabbit inference engine (CLAUDE.md)

Use Homebrew only for macOS-specific applications within nix-darwin configs

Keep Darwin-specific configurations under nix-darwin/

Files:

• nix-darwin/config/homebrew.nix

🧠 Learnings (2)

📓 Common learnings

Learnt from: CR
Repo: shunkakinoki/dotfiles PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-09-28T16:25:07.125Z
Learning: Applies to nix-darwin/** : Use Homebrew only for macOS-specific applications within nix-darwin configs

Learnt from: CR
Repo: shunkakinoki/dotfiles PR: 0
File: .cursor/rules/general.mdc:0-0
Timestamp: 2025-09-28T16:26:18.516Z
Learning: Applies to nix-darwin/** : Keep Darwin-specific configurations under nix-darwin/

📚 Learning: 2025-09-28T16:25:07.125Z

Learnt from: CR
Repo: shunkakinoki/dotfiles PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-09-28T16:25:07.125Z
Learning: Applies to nix-darwin/** : Use Homebrew only for macOS-specific applications within nix-darwin configs

Applied to files:

• nix-darwin/config/homebrew.nix

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (9)

• GitHub Check: cubic · AI code reviewer
• GitHub Check: nix-nixos
• GitHub Check: nix-linux
• GitHub Check: nix-darwin
• GitHub Check: docker-build-push (linux/arm64, arm64, ubuntu-24.04-arm)
• GitHub Check: docker-build-push (linux/amd64, amd64, ubuntu-latest)
• GitHub Check: e2e-run (Ubuntu, ubuntu-latest)
• GitHub Check: e2e-run (MacOS, macos-latest)
• GitHub Check: e2e-run (NixOS, ubuntu-latest)

[coderabbitai]

⚠️ Potential issue | 🟠 Major

Consider installing graphviz via Nix instead of Homebrew.

Graphviz is a cross-platform tool available in nixpkgs and should be installed via Nix rather than Homebrew, as it's not a macOS-specific application.

Based on learnings and coding guidelines.

Apply this diff to remove it from the Homebrew brews list:

-      "graphviz"

Then add it to your Nix configuration (e.g., in a packages list) instead:

environment.systemPackages = with pkgs; [
  graphviz
  # ... other packages
];

🤖 Prompt for AI Agents

In nix-darwin/config/homebrew.nix around line 29 the Homebrew brews list
contains "graphviz" which should be removed because Graphviz belongs in nixpkgs;
remove that entry from the brews list and instead add graphviz to your Nix
environment packages (e.g., add graphviz to environment.systemPackages = with
pkgs; [ graphviz ... ] in your Nix configuration).

[cubic-dev-ai]

No issues found across 1 file

[mesa-dot-dev]

Mesa Description

TL;DR

Added graphviz to the nix-darwin Homebrew brews list to enable DOT diagram rendering on macOS development machines.

What changed?

The file summaries are undefined, so a detailed list of changes by file cannot be provided. However, based on the PR title and summary, graphviz was added to the Homebrew brews list, likely within nix-darwin/config/homebrew.nix.

^{Description generated by Mesa. Update settings}