GitHub - iain/dotfiles: My bash / zsh / vim / pry settings

Config files for macOS. Managed with symlinks via install.rb.

New Laptop Setup

1. Install Homebrew

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

2. Clone This Repo

git clone <repo-url> ~/iain/dotfiles
cd ~/iain/dotfiles

3. Install Everything

ruby install.rb -n   # preview what will happen
ruby install.rb      # do it

This does three things in order:

Symlinks config files into place (config/* → ~/.config/*, rc/* → ~/.<name>, claude/* → ~/.claude/*). Existing files are backed up with a .backup suffix.
brew bundle — installs packages from the Brewfile (auto-detected when the file exists).
macos.sh — applies macOS defaults (auto-detected on macOS).

Each step can be controlled with flags:

ruby install.rb --no-brew    # skip brew bundle
ruby install.rb --no-macos   # skip macOS defaults

5. Set Up Git Identity

Create ~/.config/git/config.local with your per-machine identity (see config/git/config.local.example):

[user]
  email = you@example.com
  name = Your Name
  signingKey = ~/.ssh/id_ed25519.pub

6. Generate an SSH Key (for Git Signing)

ssh-keygen -t ed25519 -C "you@example.com"

Add the public key to config/git/allowed_signers and to your GitHub account (both for authentication and signing).

7. Set Fish as Default Shell

echo /opt/homebrew/bin/fish | sudo tee -a /etc/shells
chsh -s /opt/homebrew/bin/fish

8. Install Vim Plugins

Open vim and run:

Structure

config/
  fish/config.fish    — shell: PATH, aliases, abbreviations
  git/                — git config, global ignore, diff attributes, allowed signers
  ghostty/config      — terminal appearance and keybinds
  mise/config.toml    — runtime version manager settings
  starship.toml       — prompt theme (single-line, Nerd Font icons)
  vim/                — modular vim config (auto-sourced via glob)
rc/
  vimrc               — vim entry point (sources files from config/vim/)
claude/
  commands/           — custom Claude Code slash commands
Brewfile              — Homebrew packages and casks
install.rb            — installer: symlinks, brew bundle, macOS defaults
macos.sh              — macOS system preferences (run via install.rb or standalone)