createproject-rstudio

#!/usr/bin/env bash
set -ue

projectdir="$PWD"
containerdir="$(dirname "${BASH_SOURCE[0]}")"
startfilename="rstudio" # can be set arbitrarily

msg(){ echo "$@" >&2; }

help(){
  cat <<EOF
Set up the working directory as project root"
Usage: createproject [options]"

Options:
  --ask   Show a message with the current working directory
          and ask for confirmation before continuing. This is
          the default.
  --yes   Omit the user confirmation
  --help  Show this message
EOF
}

# Default is to ask user
if [ "$#" = 0 ]; then set -- --ask; fi

declare ask
while [ ! "$#" = 0 ]; do 
  case "$1" in
    --ask) ask=yes; shift; ;;
    --yes) ask=no; shift; ;;
    --help) help; exit 0; ;;
    *)
      msg "Unknown argument: '$1'. Use --help for help."
      exit 1
      ;;
  esac
done

if [ "$ask" = yes ]; then
   echo "This will set up the current directory as project root:"
   echo 
   echo "  $PWD"
   echo 
   echo "This will copy a script called '$startfilename' to this directory that"
   echo "can be used to execute programs in the container."
   echo -n "> Do you want to continue? [y/N]"
   read answer
   if [[ ! "$answer" =~ [yY] ]]; then
     echo "Cancelled."
     exit 1
   fi
fi

if [ -e "$startfilename" ]; then
  msg "File \"$startfilename\" already exists in this directory."
  msg " * If you want to change the container, delete the old file."
  msg " * If you want to use more than one container, edit the file manually"
  msg "   to link to more than one container."
  exit 1
fi

while read -r line; do
  if [[ "$line" =~ .*###REPLACE_HERE###.* ]]; then
    echo "CONTAINER_DIR='$containerdir'"
  else
    echo "$line"
  fi
done < "$containerdir/user-launcher-rstudio" > "$PWD/$startfilename"

chmod u+x "$startfilename"

echo "Done."
echo "Call \"./$startfilename start\" to start an RStudio instance."
echo "Call \"./$startfilename --help\" for info on more options."
echo