install: break up files, add nix

README.md

@@ -1,11 +1,32 @@
-### Dotfiles
+## Dotfiles
 
-My personal configuration files.
+Developer config files.
 
-##### Usage
+| Tool     | Description |
+| -------- | ----------- |
+| Homebrew | Package management |
+| Nix      | Package management (experimental) |
+| Fish     | Shell |
+| Git      | Version control |
+| Neovim   | Editor |
 
-1. Clone this repository into `~/dotfiles`
-2. Install [Homebrew](https://brew.sh/): `./install-brew.sh`
-3. Install tools: `brew bundle install --file=brew/Brewfile`
-4. Install optional tools: `brew/install-extra.sh [--casks]`
-5. Install everything else, including symlinks: `./install.sh`
+MacOS is my primary work environment, hence Homebrew. This setup can be deployed on Linux too. I am aware of criticisms with Homebrew on Linux, but it fits my needs. Nix is being considered as an alternative.
+
+### Usage
+
+Run the interactive installer for Mac/Linux: `./install.sh`
+
+If you decline every prompt, it looks like this:
+
+```
+> ./install.sh
+Install Homebrew? [Y/n] n
+Install Homebrew packages? [Y/n] n
+Install Nix? [Y/n] n
+Install Nix packages? [Y/n] n
+Set login shell? [Y/n] n
+Create symlinks? [Y/n] n
+Install vim plugins? [Y/n] n
+```
+
+These steps _should_ be executed in order. You can safely rerun a step if needed; it tries to be idempotent. Backups are created if you have existing configs that would be overwritten. Definitely do not create symlinks until you have installed the [required](brew/Brewfile) packages (the config files depend on them).

brew/Brewfile

@@ -6,10 +6,6 @@ brew "diff-so-fancy"
 brew "fd"
 brew "fish"
 brew "fzf"
-brew "gawk"
-brew "git"
 brew "neovim"
 brew "ripgrep"
-brew "tldr"
 brew "tree"
-brew "wget"

brew/brews.txt

@@ -12,7 +12,9 @@ dungeon
 elvish
 fortune
 fzy
+gawk
 gcc
+git
 gitup
 go
 gradle
@@ -55,6 +57,7 @@ syncthing
 telnet
 termtosvg
 tig
+tldr
 triangle
 tmux
 ttyd
@@ -63,6 +66,7 @@ unrtf
 up
 vitetris
 watch
+wget
 yq
 zeek
 zsxd

fish/config.fish

@@ -72,6 +72,11 @@ if test -x /home/linuxbrew/.linuxbrew/bin/brew
     eval (/home/linuxbrew/.linuxbrew/bin/brew shellenv)
 end
 
+# Nix package manager
+if test -f ~/.nix-profile/etc/profile.d/nix.sh
+    functions -q fenv && fenv source ~/.nix-profile/etc/profile.d/nix.sh
+end
+
 # Cheatsheet widget (Ctrl+G)
 if command -q navi
     navi widget fish | source

install-brew.sh

@@ -1,17 +0,0 @@
-#!/bin/bash
-
-# Check if Homebrew is already installed
-if [ -x "$(command -v brew)" ]; then
-	echo "Homebrew is already installed."
-	exit 0
-fi
-
-# Install Homebrew
-case "$(uname -s)" in
-	Darwin|Linux)
-		/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
-		;;
-	*)
-		echo "Unsupported kernel: $(uname -s)"
-		;;
-esac

install.sh

@@ -1,22 +1,28 @@
 #!/bin/bash
 
-DOTFILES="$HOME/dotfiles"
+DOTFILES=$(cd "$(dirname "$0")" && pwd)
 
-# Install symlinks
-"$DOTFILES/install-symlinks.sh"
+confirm() {
+	local prompt="$1 [Y/n] "
 
-# Install plugin manager for Neovim, if it doesn't exist
-VIM_PLUG_SRC="https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim"
-VIM_PLUG_DST="$HOME/.local/share/nvim/site/autoload/plug.vim"
-if [ ! -f "$VIM_PLUG_DST" ]; then
-	echo "Downloading plug.vim ..."
-	curl -fsSL -o "$VIM_PLUG_DST" --create-dirs "$VIM_PLUG_SRC"
-fi
+	while true; do
+		read -e -p "$prompt" yn
+		case "$yn" in
+			""    ) return 0;; # default is yes
+			[Yy]* ) return 0;;
+			[Nn]* ) return 1;;
+			*     ) ;; # wait for yes or no
+		esac
+	done
+}
 
-# Install plugins for Neovim
-nvim +PlugInstall +qall
+# Install tools
+confirm "Install Homebrew?"          && "$DOTFILES/install/install-brew.sh"
+confirm "Install Homebrew packages?" && "$DOTFILES/install/install-brew-packages.sh"
+confirm "Install Nix?"               && "$DOTFILES/install/install-nix.sh"
+confirm "Install Nix packages?"      && "$DOTFILES/install/install-nix-packages.sh"
 
-# Make fish the default shell
-BREW_PREFIX=$(brew --prefix)
-grep -q "$BREW_PREFIX/bin/fish" /etc/shells || echo "$BREW_PREFIX/bin/fish" | sudo tee -a /etc/shells
-sudo chsh -s "$BREW_PREFIX/bin/fish" $(whoami)
+# Extra steps
+confirm "Set login shell?"           && "$DOTFILES/install/install-shell.sh"
+confirm "Create symlinks?"           && "$DOTFILES/install/install-symlinks.sh"
+confirm "Install vim plugins?"       && "$DOTFILES/install/install-vim-plugins.sh"

install/install-brew-packages.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+echo "***** INSTALL HOMEBREW PACKAGES *****"
+
+DOTFILES=$(cd "$(dirname "$0")/.." && pwd)
+
+# Install required tools
+brew bundle install --file="$DOTFILES/brew/Brewfile"
+
+# Install optional tools (prompted by fzf)
+"$DOTFILES/brew/install-extra.fish"
+
+echo

install/install-brew.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+echo "***** INSTALL HOMEBREW *****"
+
+if [ -x "$(command -v brew)" ]; then
+	echo "Homebrew is already installed."
+else
+	/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
+fi
+
+echo

install/install-nix-packages.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+echo "***** INSTALL NIX PACKAGES *****"
+
+NIX_ENV="$HOME/.nix-profile/bin/nix-env"
+
+if [ -x "$NIX_ENV" ]; then
+	"$NIX_ENV" -iA nixpkgs.bat
+	"$NIX_ENV" -iA nixpkgs.fd
+	"$NIX_ENV" -iA nixpkgs.fish
+	"$NIX_ENV" -iA nixpkgs.neovim
+	"$NIX_ENV" -iA nixpkgs.ripgrep
+	"$NIX_ENV" -iA nixpkgs.tree
+	"$NIX_ENV" -iA nixpkgs.gitAndTools.diff-so-fancy
+else
+	echo "Cannot install Nix packages! $NIX_ENV is not executable."
+fi
+
+echo

install/install-nix.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+echo "***** INSTALL NIX *****"
+
+if [ -d /nix ]; then
+	echo "Nix is already installed."
+else
+	/bin/bash -c "$(curl -fsSL https://nixos.org/nix/install) --no-daemon"
+fi
+
+echo

install/install-shell.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+echo "***** INSTALL SHELL *****"
+
+SHELL_PATH='/usr/local/bin/fish'
+
+if [ ! -x "$SHELL_PATH" ]; then
+	echo "Cannot set login shell! $SHELL_PATH is not executable."
+	exit 1
+fi
+
+if [ "$SHELL" = "$SHELL_PATH" ]; then
+	echo "$SHELL_PATH is already the login shell."
+else
+	echo "Setting the login shell to $SHELL_PATH ..."
+	grep -q "$SHELL_PATH" /etc/shells || echo "$SHELL_PATH" | sudo tee -a /etc/shells
+	sudo chsh -s "$SHELL_PATH" $(whoami)
+fi
+
+echo

install/install-symlinks.sh

@@ -1,6 +1,8 @@
 #!/bin/bash
 
-DOTFILES="$HOME/dotfiles"
+echo "***** INSTALL SYMLINKS *****"
+
+DOTFILES=$(cd "$(dirname "$0")/.." && pwd)
 
 backup_existing() {
 	if [ -e "$1" ]; then
@@ -24,3 +26,5 @@ ln -fsv "$DOTFILES/bash/.bashrc" "$HOME/.bashrc" # Bash does not support XDG con
 ln -fsv "$DOTFILES/fish"         "$HOME/.config"
 ln -fsv "$DOTFILES/nvim"         "$HOME/.config"
 ln -fsv "$DOTFILES/git"          "$HOME/.config"
+
+echo

install/install-vim-plugins.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+echo "***** INSTALL VIM PLUGINS *****"
+
+VIM_PLUG="$HOME/.local/share/nvim/site/autoload/plug.vim"
+
+if [ -f "$VIM_PLUG" ]; then
+	echo "Updating vim plugin manager..."
+	echo "Updating vim plugins..."
+	nvim +PlugUpgrade +PlugUpdate +qall
+else
+	echo "Installing vim plugin manager..."
+	curl -fsSL -o "$VIM_PLUG" --create-dirs https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
+	echo "Installing vim plugins..."
+	nvim +PlugInstall +qall
+fi
+
+echo