#!/usr/bin/env bash


# File: ssh-lyx-tester

# Usage:
# ssh-lyx-tester <path-to-key> <server>

# Description:
# Uploads required files to a server and runs lyx-tester


# Copyright 2013, Scott Kostyshak
# Copyright 2013, Kornel Benko

# This program 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 2 of the License, or
# (at your option) any later version.
#
# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.


set -o nounset

if [[ "$-" =~ i ]]; then
  ECHOPREFIX=
else
  ECHOPREFIX="$( basename "$0" ): "
fi
ERRORPREFIX="${ECHOPREFIX}Error: "
WARNINGPREFIX="${ECHOPREFIX}Warning: "
USAGE="correct usage: $( basename "$0" ) <key> <server>"

# TODO implement command parsing and options.
# if SOURCE_ENV is 1, then the path will be reloaded in each new bash instance.
# This is useful on a server when you don't want to restart.
SOURCE_ENV=0

if [ "$#" != "2" ]; then
  echo -e "${ERRORPREFIX}incorrect usage.\n${USAGE}"
  exit 1
fi

key="$1"
server="$2"

if [ ! -r ${key} ]; then
  echo -e "${ERRORPREFIX}specified key does not exist or does not have read permission.\n${USAGE}"
  exit 1
fi

# This is a personal preference (if this line is removed though, you might need
# to run the next ssh/scp command with -o StrictHostKeyChecking=no).
ssh -o StrictHostKeyChecking=no -f -i "${key}" ubuntu@${server} 'byobu-launcher-install' \
  >/dev/null 2>&1 || { echo "${ERRORPREFIX}could not run byobu-launcher-install" >&2; exit 1; }

filesToTransfer=(
  lyx-tester
  debian-control-texlive-in.txt
  install-tl-ubuntu
  lyxbuild
)

for file in ${filesToTransfer[@]}; do
  [ -e "${file}" ] || { echo "${ERRORPREFIX}required file, ${file}, does not exist." >&2; exit 1; }
done

echo "${ECHOPREFIX}transfering files..."
scp -r -i "${key}" "${filesToTransfer[@]}" ubuntu@${server}:/home/ubuntu/ >/dev/null 2>&1 \
  || { echo "${ERRORPREFIX}could not scp the main files over." >&2; exit 1; }
echo "${ECHOPREFIX}transfer done."

ssh -f -i "${key}" ubuntu@${server} "mkdir /home/ubuntu/lyx-tester-logs && sudo /home/ubuntu/lyx-tester >/home/ubuntu/lyx-tester-logs/mainlog.log 2>&1" \
  || { echo "${ERRORPREFIX}could not dispatch lyx-tester." >&2; exit 1; }

if [ "${SOURCE_ENV}" ]; then
  ssh -i "${key}" ubuntu@${server} "echo \"source /etc/environment\" >> ~/.bashrc" \
    || { echo "${ERRORPREFIX}: could not append to .bashrc." >&2; }
fi

echo "${ECHOPREFIX}lyx-tester is off and running on the remote server."