bootstrap.sh

#!/bin/sh

# Get the absolute path to the directory containing this script.
DOTFILES_DIR=$(CDPATH='' cd -- "$(dirname -- "$0")" && pwd)

echo "Running from $DOTFILES_DIR"

# shellcheck source=shell/.config/shell/lib.sh
if ! . "$DOTFILES_DIR/shell/.config/shell/lib.sh"; then
    echo "Could not load shell/.config/shell/lib.sh" >&2
    exit 1
fi

# Only run sudo if we're not root.
as_root() {
    if [ "$(id -u)" -ne "0" ]; then
        command sudo "$@"
    else
        "$@"
    fi
}

ensure_file_does_not_exist() {
    if [ ! -f "$1" ] || [ -L "$1" ]; then
        return 0
    fi

    if mv "$1" "$1.bak"; then
        echo "moved '$1' -> '$1.bak'"
        return 0
    fi

    echo "'$1' could not be moved" >&2
    return 1
}

install_packages() {
    # Try to initialize Homebrew. This is useful if this script runs
    # just after installing Homebrew, but before Homebrew's dotfiles
    # are stow'd, so running `brew` will fail.
    # shellcheck source=brew/.config/shell/profile.d/10-brew.sh
    . "$DOTFILES_DIR/brew/.config/shell/profile.d/10-brew.sh" 2>/dev/null || true

    if has winget.exe; then
        echo "Installing packages using winget..."
        if ! winget.exe import -i winget-packages.jsonc \
             --accept-package-agreements --accept-source-agreements; then
            echo "winget could not install all packages." >&2
            exit 1
        fi
        echo "Successfully installed packages."
    fi

    if has brew; then
        echo "Installing packages using Homebrew..."
        if ! { brew update && brew bundle --file=Brewfile; } then
            echo "Homebrew could not install all packages." >&2
            exit 1
        fi
    elif has apt-get; then
        echo "Installing packages using apt-get..."
        if ! { as_root apt-get update \
            && as_root xargs -a apt-packages.txt apt-get install -y; } then
            echo "apt could not install all packages." >&2
            exit 1
        fi
    elif has apk; then
        echo "Installing packages using apk..."
        if ! { as_root apk update \
            && as_root xargs -a apk-packages.txt apk -v add; } then
            echo "apk could not install all packages." >&2
            exit 1
        fi
    else
        echo "No package manager found" >&2
        exit 1
    fi

    echo "Successfully installed packages."
    return 0
}

stow_shell() {
    ensure_file_does_not_exist "$HOME/.profile"

    stow -R shell
}

maybe_stow_bash() {
    if ! has bash; then
        return 0
    fi

    ensure_file_does_not_exist "$HOME/.bash_profile"
    ensure_file_does_not_exist "$HOME/.bashrc"

    stow -R bash
}

maybe_stow_brew() {
    if ! has brew; then
        return 0
    fi

    stow -R brew
}

maybe_stow_starship() {
    if ! has starship; then
        return 0
    fi

    stow -R starship
}

maybe_stow_zsh() {
    if ! has zsh; then
        return 0
    fi

    ensure_file_does_not_exist "$HOME/.zshenv"
    ensure_file_does_not_exist "$HOME/.zshrc"

    stow -R zsh
}

maybe_stow_git() {
    if ! has git; then
        return 0
    fi

    ensure_file_does_not_exist "$HOME/.gitconfig"

    stow -R git

    git update-index --skip-worktree "git/.gitconfig"
    git config --local core.hooksPath ".git-hooks/"
}

install_packages
stow_shell

maybe_stow_bash
maybe_stow_brew
maybe_stow_starship
maybe_stow_zsh
maybe_stow_git

echo "Bootstrapping complete"
return 0