fix: suppress nix derivation context warnings

[shunkakinoki]

Summary

• Replace pkgs.replaceVars with pkgs.substituteAll for hydrate scripts in config/ccs and config/openclaw — replaceVars uses builtins.toFile at eval time which drops store path context, while substituteAll runs as a proper build-time derivation
• Disable home-manager manual generation (manual.manpages.enable = false) to suppress the options.json context warning

Test plan

• Verify nix build completes without the two builtins.derivation context warnings
• Verify hydrate scripts still substitute @var@ placeholders correctly at activation time

🤖 Generated with Claude Code

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Summary by cubic

Suppress Nix derivation context warnings by moving hydrate script substitution to build time with pkgs.writeText, and disabling the home-manager manual. Nix 2.18+ builds now complete without the two warnings and remain compatible after substituteAll removal.

• Bug Fixes

  • In config/ccs, replace pkgs.replaceVars with pkgs.writeText + builtins.replaceStrings to preserve store path context and avoid builtins.toFile warnings.
  • In home-manager, set manual.manpages.enable = false to prevent the options.json context warning.

• Refactors

  • Format Nix files for treefmt.

^{Written for commit 5c8b6b2. Summary will update on new commits.}

[mesa-dot-dev]

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[coderabbitai]

📝 Walkthrough

Walkthrough

Two configuration adjustments: the hydrateScript derivation in the CCS config now uses pkgs.writeText with builtins.replaceStrings for placeholder substitution instead of pkgs.replaceVars, and Home Manager configuration adds a setting to disable manual pages warnings.

Changes

Cohort / File(s)	Summary
Script Substitution Refactoring config/ccs/default.nix	Changed placeholder substitution mechanism for hydrateScript from replaceVars to writeText with explicit replaceStrings, replacing @sed@ token with resolved gnused binary path.
Home Manager Configuration home-manager/default.nix	Added manual.manpages.enable = false setting to suppress options.json generation warnings.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Poem

🐰 A script once swapped its placeholders with care,
From replaceVars to strings floating through air,
While Home Manager hushed its manual page chatter,
Two tweaks, two changes, both nimble and light—
Configuration flows now, ever more right! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'fix: suppress nix derivation context warnings' directly reflects the main objective of the PR, which is to suppress Nix derivation context warnings through script substitution changes and home-manager configuration.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description check	✅ Passed	The pull request description clearly describes the changeset, mentioning the replacement of pkgs.replaceVars with pkgs.writeText + builtins.replaceStrings and the disabling of home-manager manual generation, which aligns with the actual file changes.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/nix-derivation-context-warnings

📝 Coding Plan

• Generate coding plan for human review comments

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[gemini-code-assist]

Summary of Changes

Hello, 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 addresses and resolves two distinct Nix derivation context warnings. By switching to a more robust substitution method for hydration scripts and explicitly disabling a specific home-manager feature, the changes aim to clean up build output and ensure more reliable derivation behavior.

Highlights

• Hydration Script Improvement: Replaced pkgs.replaceVars with pkgs.substituteAll in config/ccs and config/openclaw hydration scripts to prevent store path context loss during evaluation.
• Home-Manager Warning Suppression: Disabled home-manager manual generation (manual.manpages.enable = false) to suppress the options.json context warning.

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[mesa-dot-dev]

Mesa Description

TL;DR

Suppressed Nix derivation context warnings by refactoring hydrate script substitution in config/ccs to use pkgs.writeText and builtins.replaceStrings instead of pkgs.replaceVars, and by disabling home-manager manual generation in home-manager/default.nix.

What changed?

• config/ccs/default.nix: Refactored the hydrateScript to use pkgs.writeText and string replacement functions instead of pkgs.replaceVars. This change avoids builtins.toFile context warnings and preserves the embedding of the sed path into hydrate.sh.
• home-manager/default.nix: Disabled home-manager manual manpage generation by setting manual.manpages.enable = false to resolve a warning related to options.json generation.

^{Description generated by Mesa. Update settings}

[gemini-code-assist]

Code Review

The pull request updates Nix configurations by migrating the use of pkgs.replaceVars to pkgs.substituteAll in config/ccs/default.nix and config/openclaw/default.nix, requiring the script source to be explicitly defined with src = ./hydrate.sh;. Additionally, it disables home-manager manpage generation in home-manager/default.nix to suppress a warning related to options.json.

[cubic-dev-ai]

No issues found across 3 files

[Copilot]

Pull request overview

Suppress Nix “derivation context” warnings by moving hydrate script templating to build-time derivations and disabling a Home Manager manual output.

Changes:

• Switch hydrate scripts from pkgs.replaceVars to pkgs.substituteAll in config/ccs and config/openclaw.
• Disable Home Manager manpage generation via manual.manpages.enable = false.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
home-manager/default.nix	Disables Home Manager manpage generation to reduce manual-related warnings.
config/openclaw/default.nix	Migrates hydrate script substitution from eval-time to build-time derivation.
config/ccs/default.nix	Migrates hydrate script substitution from eval-time to build-time derivation.

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