#!/bin/sh
# Bootstrap script for Honu.
# Installs essential Debian/Ubuntu packages if it can, then clones
# Honu and MakeStuff, and runs make in Honu.

# The bootstrap process is controlled by the following environment variables:
# INSTALL_PKGS=true                     -- set to false if you're not in the sudo group
# HAVE_X=true                           -- set to false if $DISPLAY is undefined
# REPOS=https://github.com/ssavitzky    -- base for git repositories

# HAVE_X will work on systems with X and a fair amount of space; for a
# tiny system like a Raspberry Pi you'd want to export HAVE_X=false and
# be selective about which packages you install.

### Preliminaries:

if [ root = `whoami` ]; then
    echo "Honu creates many files and directories in your home directory."
    echo "If you are running as root, you won't be able to edit them."
    echo "Giving up."
    exit 1
fi

# Set sensible defaults for INSTALL_PKGS and HAVE_X

if [ -z $INSTALL_PKGS ]; then
    if groups | grep -q sudo; then
	INSTALL_PKGS=true	# set false if you don't want to install packages
    else
	echo "You don't appear to be in the sudo group, so I won't try to install packages."
	INSTALL_PKGS=false
    fi
fi

if [ -z $HAVE_X ]; then
    if [ -z $DISPLAY ]; then
	HAVE_X=false
    else
	HAVE_X=true
    fi
fi

if $INSTALL_PKGS; then
    # See whether we can (and want to) install packages
    sudo : || $INSTALL_PKGS=false
fi

if $INSTALL_PKGS; then		### Install packages.

    # Required packages: if we don't get these, all is lost.
    sudo apt-get -y install git curl wget make openssh-client

elif for f in git wget make ssh;  do which $f > /dev/null; done; then
    # ok, we have all the required packages without having to install them.
    # It's still possible that things won't work, but at least we can run
    # the makefiles.
    true
else
    echo "You don't have all the required packages, and can't install them."
    echo "Giving up."
    exit -1
fi # INSTALL_PKGS

export INSTALL_PKGS HAVE_X

### Now that we have git, we can fetch the repositories we need:

# Prefix for the git repos
if [ -z "$REPOS" ]; then
    REPOS=https://github.com/ssavitzky
fi
# fetch the repositories we need.  (Currently just Honu and MakeStuff)
for r in Honu MakeStuff; do
    [ -d $$r ] || git clone $REPOS/$r.git
done

if $INSTALL_PKGS; then
    # TODO:  look at HAVE_X in the makefiles
    (cd Honu; make install-pkgs)
fi

### Install the dotfiles and other goodies.
#   Note that not all of it will be useful or even usable without the
#   packages, but what's there will give you a comfortable $HOME.
(cd Honu; make install)

echo You may need to set up both gnome and xfce power managers.
echo Welcome home, $USER.  Home is wherever you carry your \$SHELL.