makesymlinks.sh

#!/usr/bin/env bash

set -e  # Exit immediately if a command exits with a non-zero status

############################
# .make.sh
# This script creates symlinks from the home directory to any desired dotfiles in ~/dotfiles

dir=~/dotfiles                    # dotfiles directory
olddir=~/dotfiles_old             # old dotfiles backup directory
files=("bash_aliases" "vimrc" "vim" "tmux.conf" "gitignore_global" "inputrc" "zsh_aliases" "pdbrc" "pdbrc.py") # list of files/folders to symlink in homedir

# Add shell specific rc file
case "$(detect_shell)" in
    zsh)
        files+=("zshrc")
        ;;
    *)
        files+=("bashrc")
        ;;
esac

detect_shell() {
    basename "$SHELL"
}

detect_os() {
    local os="$(uname)"
    case "$os" in
        Darwin)
            echo "macos"
            ;;
        Linux)
            if [ -f /etc/os-release ]; then
                . /etc/os-release
                case "$ID" in
                    ubuntu)
                        echo "ubuntu"
                        ;;
                    rhel|centos)
                        echo "redhat"
                        ;;
                    *)
                        echo "linux"
                        ;;
                esac
            else
                echo "linux"
            fi
            ;;
        *)
            echo "unknown"
            ;;
    esac
}

os_specific_setup() {
    local os_name
    os_name=$(detect_os)
    case "$os_name" in
        macos)
            echo "macOS detected"
            if command -v brew >/dev/null 2>&1; then
                xargs brew install < "$dir/brew_requirements.txt"
            fi
            ;;
        ubuntu)
            echo "Ubuntu detected"
            if command -v apt-get >/dev/null 2>&1; then
                sudo apt-get update
            fi
            ;;
        redhat)
            echo "RedHat detected"
            if command -v yum >/dev/null 2>&1; then
                sudo yum update -y
            fi
            ;;
        *)
            echo "OS $os_name not specifically handled"
            ;;
    esac
}

create_backup() {
    # Create dotfiles_old in homedir
    echo -n "Creating $olddir for backup of any existing dotfiles in ~ ..."
    mkdir -p "$olddir" && echo "done" || echo "failed"
}

move_and_link_files() {
    for file in "${files[@]}"; do # Use "${files[@]}" to loop over array items
        local src="${HOME}/.${file}"
        local dest="$dir/$file"
        if [ -e "$src" ]; then
            echo "Moving existing dotfile $file from ~ to $olddir"
            mv "$src" "$olddir"
        fi
        echo "Creating symlink to $file in home directory."
        ln -s "$dest" "$src"
    done

    if [ ! -d ~/.config/htop/ ]; then
        echo "making .htoprc"
        mkdir -p ~/.config/htop
    fi

    if [ ! -d ~/.config/nvim/ ]; then
        echo "Creating symlink for nvim config"
        ln -s "$dir/nvim" ~/.config/nvim
    fi
}


setup_git() {
    echo "Setting git settings"
    git config --global core.excludesfile ~/.gitignore_global
    git config --global diff.tool nvimdiff
    git config --global difftool.prompt false
    git config --global merge.tool vimdiff
    git config --global merge.tool nvimdiff
    git config --global mergetool.keepBackup false
    git config --global init.defaultBranch main
    git config --global rerere.enabled true
    git config --global rerere.autoUpdate true
    git config --global branch.sort -committerdate
    git config --global alias.blame "blame -w -C -C -C"
    git config --global alias.graph "log --oneline --branches --graph --decorate"
    git config --global alias.fpush "push --force-with-lease"
    
    # Additional configurations
    git config --global color.ui auto
    git config --global core.editor nvim
    git config --global pull.rebase false
    git config --global fetch.prune true
    git config --global alias.st "status"
    git config --global alias.co "checkout"
    git config --global alias.ci "commit"
    git config --global alias.br "branch"
    git config --global alias.lg "log --oneline --graph --decorate --all"
    git config --global alias.unstage "reset HEAD --"
    git config --global alias.last "log -1 HEAD"
    git config --global alias.visual "!gitk"
    git config --global push.default simple
}


setup_new_files() {
    ln -s $dir/htoprc ~/.config/htop/htoprc

    # Create a directory for vim temporary files 
    echo "making vim_tmp dir"
    mkdir -p ~/.vim_tmp

    # Set the global .gitignore script
    echo "Setting up ipython evn" 
    if [ ! -d ~/.ipython/profile_default/ ]; then
        echo "making .ipython dir"
        mkdir -p ~/.ipython/profile_default/startup/
    fi
    ln -s $dir/ipython/profile_default/ipython_config.py ~/.ipython/profile_default/ipython_config.py
    ln -s $dir/ipython/profile_default/startup/ipython_startup.py ~/.ipython/profile_default/startup/ipython_startup.py
}


main() {
    create_backup
    cd ~ || exit
    move_and_link_files
    cd ~ || exit
    setup_new_files
    setup_git
    os_specific_setup
}


main "$@"