#! /bin/bash
# Adapted from github.com/gkilleen33/overleaf-offline under the MIT license

# .autoltx file contents as per line numbers:
# 1. build date in epoch, for checking for updates.

# CD into the main directory
echo
cd /app/project || exit 2

if test -d "pdf/"; then
    rm -r pdf/
fi

requiresUpdate=0
settingsExists=0

# Check for updates
if test -f "/app/project/.autoltx"; then
  buildDate=`cat /app/setupFiles/buildDate`
  installedVersion=`sed -n "1p" /app/project/.autoltx`
  settingsExists=1
  if [[ installedVersion -eq buildDate ]]; then
      requiresUpdate=0
      echo AutoLTX already installed, skipping steup...
  else
      requiresUpdate=1
      echo Found old AutoLTX files, updating...
  fi
else
    echo "1" > /app/project/.autoltx
    requiresUpdate=1
    echo AutoLTX not installed, configuring...
fi

# Update files if necessary
if [[ requiresUpdate -eq 1 ]]; then
    # Add latexmk rc file to build files
    cp /app/setupFiles/latexmkrc /app/project/
    # Add compile script to build files
    cp /app/setupFiles/compile.sh /app/project/

    chmod +x compile.sh

    if test -f "/app/project/.gitignore"; then
        # Adding build files to .gitignore
        grep -qxF 'pdf/' .gitignore || echo 'pdf/' >> .gitignore
        grep -qxF 'latexmkrc' .gitignore || echo 'latexmkrc' >> .gitignore
        grep -qxF 'compile.sh' .gitignore || echo 'compile.sh' >> .gitignore
        grep -qxF '.autoltx' .gitignore || echo '.autoltx' >> .gitignore
        grep -qxF 'output.pdf' .gitignore || echo 'output.pdf' >> .gitignore
        grep -qxF '*.aux' .gitignore || echo '*.aux' >> .gitignore
    else
        # Creates .gitignore file
        echo Configuring .gitignore for this project
        printf 'pdf/\nlatexmkrc\ncompile.sh\n.autoltx\noutput.pdf\n*.aux\n' >> /app/project/.gitignore
    fi
    sed -i "1s/.*/$buildDate/" /app/project/.autoltx
fi
echo