#!/usr/bin/env bash

# Copyright © 2019 Dynare Team
#
# This file is part of Dynare.
#
# Dynare is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Dynare is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Dynare.  If not, see <http://www.gnu.org/licenses/>.

set -ex

set -o errexit
readonly LOG_FILE="$2"/install.log
sudo touch "$LOG_FILE"
exec 1>"$LOG_FILE"
exec 2>&1

# Remove dummy payload
rm -f "$2"/dummy

# Test for Internet connection
[[ -z $(curl -s -m 4 www.google.com) ]] && { echo "No internet connection found"; exit 1; }

# Install Command Line Tools
if [[ -z $(/usr/bin/xcode-select -print-path) ]]; then
    touch /tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress;
    SUC=$(softwareupdate -l |
              grep "\*.*Command Line" |
              grep -m1 "" |
              awk -F"*" '{print $2}' |
              sed -e 's/^ *//' |
              tr -d '\n')
    # On macOS 10.15 softwareupdate output is preceded by "Label: "
    [[ $SUC == Label:* ]] && SUC=${SUC#"Label: "}
    softwareupdate -i "$SUC" --verbose;
    rm -f /tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress;
    softwareupdate -l
fi

# If CLT installation didn't work, exit
[[ -z $(/usr/bin/xcode-select -print-path) ]] && \
    { echo "You must install Command Line Tools to proceed with installation of GCC"; exit 1; }

# Install Homebrew
BREWDIR="$2"/.brew
[ -d "$BREWDIR" ] || mkdir -p "$BREWDIR"

BREW_URL="https://github.com/Homebrew/brew"
BREW_BRANCH="master"

curl -\# -L "$BREW_URL"/tarball/"$BREW_BRANCH" | tar xz -m --strip 1 -C "$BREWDIR"

# Change ownership of Dynare directory
chown -R "$USER":staff "$2"

sudo -u "$USER" "$BREWDIR"/bin/brew tap homebrew/core
HOMEBREW_CACHE="$HOME"/Library/Caches/Homebrew-Dynare
HOMEBREW_NO_AUTO_UPDATE=1
[[ -z "${HOMEBREW_NO_ANALYTICS}" ]] && HOMEBREW_NO_ANALYTICS=1

# Move modified formulas to Homebrew Formula directory
mv "$2"/*.rb "$BREWDIR"/Library/Taps/homebrew/homebrew-core/Formula

# Install GCC & deps
sudo -u "$USER" "$BREWDIR"/bin/brew install gcc -v --force-bottle

exit 0