.dotsetup

#!/bin/sh
# dotsetup v1.1: Setup utility to bootstrap dotfiles.
# Copyright © 2017 Adrian Pistol <vifino@tty.sh>
# This work is free. You can redistribute it and/or modify it under the
# terms of the Do What The Fuck You Want To Public License, Version 2,
# as published by Sam Hocevar. See http://www.wtfpl.net/ for more details.

# To use this script for your own dotfiles,
# you need to have a few things: Git, a git host,
# and the bourne shell.
#
# Start by setting a few variables in the shell
# you wanna use to setup your dotfiles:
# $ export REPO_DIR="$HOME/.dotfiles"                         # or wherever you want them.
# $ export REPO_DST="$HOME"                                   # where to check things out, shouldn't need to change this.
# $ export REPO_URL="https://mygithost.tld/user/dotfiles.git" # shouldn't be hard to figure out what this is.
#
# Then, copy *this* file to `$REPO_DST/.dotsetup` and
# change the variables there too. Not too hard.
#
# Setting up the repo:
# $ git init --bare "$REPO_DIR"
# $ alias dotfiles='git --git-dir="$REPO_DIR" --work-tree="$REPO_DST"'
# $ dotfiles add "$REPO_DST/.dotsetup"
# $ dotfiles commit -m "My first dotfiles commit." -m "Thanks for .dotsetup, @vifino."
# $ dotfiles remote add origin "$REPO_URL"
# $ dotfiles push --set-upstream origin master
#
# After that, given you (or I) didn't fuck
# anything up, `curl`-ing your dotsetup file
# into `sh`, `ash`, `bash`, or `zsh` should work.
#
# The aliases given out at the end should be added
# to your favourite shell's RC.
#
# PS: I'd love a poke about this if you decide to use it.
#     Maybe makes me a little bit happier
#
# Good luck and happy dotfiling!
# - vifino

# Bail out on errors.
set -e

# Variables! CHANGE THIS.
# Note: Escape $, so it's \$, will make things better.
REPO_URL="https://github.com/vifino/.files"
REPO_DIR="\$HOME/.dotfiles"
REPO_DST="\$HOME"

# You normally shouldn't need to change anything below here.

# Private variables
# Because having uninterpreted variables in the variables above is very good,
# we need to `eval` them, which is... questionable. But hey, it works.
REPO_URL_PARSED=`eval echo "$REPO_URL"`
REPO_DIR_PARSED=`eval echo "$REPO_DIR"`
REPO_DST_PARSED=`eval echo "$REPO_DST"`

# Helpers
msg_info() {
	printf ">>> %s\n" "$1"
}

msg_exec() {
	echo "$ $@"
	"$@"
}

dotfiles() {
	git --git-dir="$REPO_DIR_PARSED" --work-tree="$REPO_DST_PARSED" "$@"
}

msg_dotcmd() {
	msg_exec git --git-dir="$REPO_DIR_PARSED" --work-tree="$REPO_DST_PARSED" "$@"
}

##
# Actual(tm) logic.
##

# Initialization logic.
if [ ! -d "$HOME/.dotfiles" ]; then
	msg_info "No dotfiles clone found, cloning..."
	git clone --depth=1 --bare "$REPO_URL_PARSED" "$REPO_DIR_PARSED"
	dotfiles config --local status.showUntrackedFiles no
fi

# Updating logic.
msg_info "Updating dotfiles repo..."
msg_dotcmd pull

msg_info "Checking out..."
msg_dotcmd checkout

# Info banner.
DOTVERSION=`dotfiles rev-parse --short HEAD`
msg_info "Hooray! Checked out $DOTVERSION."
msg_info "Should you wish to update the repo, simply run this script again."
msg_info "A couple handy aliases you might wish to have:"
cat <<EOF
  alias dotfiles='git --git-dir="$REPO_DIR" --work-tree="$REPO_DST"'
  alias update-dotfiles='"$REPO_DST/.dotsetup"'
EOF