Chezmoi Dotfiles Management

This skill helps manage dotfiles using chezmoi in this repository.

Repository Location

All dotfiles are managed in ~/.local/share/chezmoi which is a git repository synced to GitHub at https://github.com/craigtkhill/dotfiles.git.

Critical Workflow

When creating or modifying dotfiles, you MUST follow this exact order:

1. Check for drift before every new task — no exceptions

   Run this before starting any new task in this repo, not just once per session — other processes (e.g. Obsidian) edit tracked files live and can create drift mid-session:

   chezmoi status
   

   Empty output → proceed. Any output → re-add every drifted file immediately (paths from chezmoi status are home-relative), regardless of whether it's related to the current task:

   chezmoi status | awk '{print $2}' | while read -r f; do chezmoi re-add ~/"$f"; done
   

   The pre-commit hook blocks commits when home directory files differ from the chezmoi source. Never wait to be asked or reminded.

2. Navigate to chezmoi source directory

   cd ~/.local/share/chezmoi
   

3. Create or edit files using chezmoi naming conventions

   • Use dot_ prefix for dotfiles (e.g., dot_gitconfig → ~/.gitconfig)
   • Preserve directory structure (e.g., dot_config/fish/functions/ → ~/.config/fish/functions/)
   • You can edit directly in ~/.local/share/chezmoi or use chezmoi edit <target-path>

4. Apply changes to home directory

   chezmoi apply
   # or for specific file:
   chezmoi apply ~/.config/fish/functions/myfile.fish
   

5. Commit and push to GitHub

   cd ~/.local/share/chezmoi
   git add .
   git commit -m "your message"
   git push origin main
   

6. Verify it's managed

   chezmoi managed | grep myfile
   

Common Commands

• chezmoi status - Show what has changed
• chezmoi diff - Show detailed differences
• chezmoi managed - List all managed files
• chezmoi apply - Apply changes from dotfiles to home directory
• chezmoi apply --force - Force apply, overriding conflicts
• chezmoi add <file> - Add a file to chezmoi tracking
• chezmoi re-add <file> - Re-add a tracked file

Fish Shell Specifics

Fish automatically loads functions from ~/.config/fish/functions/. Each function must be in its own file named functionname.fish.

After adding new fish functions:

1. Copy to ~/.config/fish/functions/
2. Functions are immediately available (fish auto-loads them)
3. No need to source or reload

Adding Existing Files to Chezmoi

If you want to add an existing file from your home directory to chezmoi:

chezmoi add ~/.config/fish/functions/myfile.fish

This will copy the file to ~/.local/share/chezmoi with proper naming and make it managed.

Package Manager Policy

Tools are split across two files:

• Brewfile — preferred for macOS. Use when Homebrew version is equal to or newer than Cargo.
• Cargofile — use only when Cargo has a newer version than Homebrew, or when there is no Homebrew equivalent (e.g. cargo-update).

When adding a new CLI tool:

1. Check Homebrew version: brew info <tool> --json | python3 -c "import sys,json; print(json.load(sys.stdin)[0]['versions']['stable'])"
2. Check Cargo version: curl -s https://crates.io/api/v1/crates/<tool> | python3 -c "import sys,json; print(json.load(sys.stdin)['crate']['newest_version'])"
3. If versions are equal → Brewfile
4. If Cargo is newer → Cargofile
5. If no Homebrew equivalent → Cargofile

Common Mistakes

❌ DON'T: Edit files directly in ~/.config/fish/ without updating chezmoi

• Changes will be lost when chezmoi applies source files

❌ DON'T: Forget to commit and push changes to GitHub

• Your dotfiles won't be backed up or available on other machines

❌ DON'T: Retry git commit immediately after a hook failure without re-running chezmoi apply

• Hooks like end-of-file-fixer rewrite files in the working tree on failure, silently re-creating drift against home. Always chezmoi apply && chezmoi status (must be empty) before retrying.

❌ DON'T: Trust what's staged after a failed commit attempt

• A prior git add -A can leave unrelated files staged, bundling them into your next, supposedly-separate commit. Run git diff --cached --stat and confirm only intended paths before committing.

❌ DON'T: Write the commit message before your final check of what's staged

• A hook or chezmoi apply running between staging and committing can change the staged diff, making an earlier-drafted message stale. Run git diff --cached --stat immediately before git commit and confirm it still matches the message — if not, stop and reconcile before committing.

✅ DO: Edit in ~/.local/share/chezmoi → Apply → Commit → Push