#!/usr/bin/env bash

default_flag="$rvm_default_flag"
# Prevent it from recursing.
unset rvm_default_flag rvm_wrapper_name

source "$rvm_scripts_path/base"

full_binary_name() {
  echo "$binary_name" | __rvm_strip 
}

wrap() {
  mkdir -p "$(dirname "$file_name")"
  rm -f "$file_name"

  echo "#!/usr/bin/env sh" > "$file_name"
  echo "if [ -s \"${rvm_environments_path}/${environment_identifier}\" ] ; then" >> "$file_name"
  echo "  . \"${rvm_environments_path}/${environment_identifier}\"" >> "$file_name"
  echo "  exec $binary_name \"\$@\"" >> "$file_name"
  echo "else" >> $file_name
  echo "  echo \"ERROR: Missing RVM environment file: '${rvm_environments_path}/${environment_identifier}'\"" >> $file_name
  echo "  exit 1" >> $file_name
  echo "fi" >> $file_name

  if [[ -f $file_name ]] ; then chmod +x $file_name ; fi
}

symlink_binary() {
  # Generate the default wrapper with the given binary name.
  # We first check if we can wrap the binary and if we were able to,
  # we then symlink it into place.
  if wrap_binary && [[ -f "$file_name" ]]; then
    rm -f "${rvm_bin_path}/${prefix}_${binary_name}"
    ln -fs "$file_name" "${rvm_bin_path}/${prefix}_${binary_name}"
  fi
}

wrap_binary() {
  # We wrap when the given binary is in the path or override_check is set to one.
  if [[ "$override_check" = "1" ]] || command -v $binary_name > /dev/null; then
    wrap
  else
    $rvm_scripts_path/log "error" "Binary '$binary_name' not found in path."
    return 1
  fi
}

usage() {
  printf "Usage: 'rvm wrapper [ruby_string] [wrapper_prefix] [binary[ binary[ ...]]]'\n"
  printf "        Where binary defaults to ruby, gem, rake, irb, rdoc, ri, testrb\n"
  printf "        For more information, see 'rvm help wrapper'\n"
}

# Empty ruby string: show usage and exit.

if [[ -z "$1" ]]; then
  usage
  exit 1
fi

ruby_string="$1"; shift

override_check=0
prefix="$1"
[[ "$#" -gt 0 ]] && shift

binaries="$(echo "$@" | __rvm_strip)"

if [[ 'system' == '$ruby_string' ]]; then
  $rvm_scripts_path/log "error" "Wrapper can't be called with system rubies - sorry!"
  exit 1
fi

# Default the list of binaries to those we use regularily.
if [[ -z "$binaries" ]] ; then
  binaries="ruby gem irb ri rdoc rake erb testrb"
fi

# Use the correct ruby.
__rvm_become "$ruby_string"

__rvm_ensure_has_enviroment_files

environment_identifier="$(__rvm_environment_identifier)"

# For each binary, we want to generate the wrapper / symlink
# it to the existing wrapper if needed.
for binary_name in $binaries; do
  file_name="${rvm_wrappers_path}/${environment_identifier}/${binary_name}"
  if [[ -z "$prefix" ]] ; then
    override_check=1
    wrap_binary
    # Symlink it into place.
    if [[ -f "$file_name" ]]; then
      if [[ "$binary_name" == "ruby" ]] ; then
        destination="$rvm_bin_path/$environment_identifier"
      else
        destination="$rvm_bin_path/${binary_name}-${environment_identifier}"
      fi
      rm -rf "$destination"
      ln -nsf "$file_name" "$destination"
    fi; unset destination
  else
    symlink_binary
  fi ; unset file_name
done

exit $?