#!/usr/bin/env bash

unset rvm_default_flag

source $rvm_scripts_path/initialize
source $rvm_scripts_path/utility
source $rvm_scripts_path/selector

if [[ ! -z "$rvm_trace_flag" ]] ; then set -x ; export rvm_trace_flag ; fi

trap "if [[ -d $rvm_tmp_path/ ]] && [[ -s $rvm_tmp_path/$$ ]] ; then rm -f $rvm_tmp_path/$$ > /dev/null 2>&1 ; fi ; exit" 0 1 2 3 15

full_binary_name() {
  echo "$binary_name" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//'
}

wrap() {
  mkdir -p "$(dirname "$file_name")"
  rm -f "$file_name"
  printf "#!/usr/bin/env sh\n" > "$file_name"
  printf "source \"${rvm_environments_path}/${environment_identifier}\"\n" >> "$file_name"
  printf "exec $binary_name \"\$@\"\n" >> "$file_name"

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

symlink_binary() {
  # Generate the default wrapper with the given binary name.
  [[ ! -f "$file_name" ]] && wrap_binary
  # Then symlink it into place.
  ln -fs "$file_name" "${rvm_bin_path}/${prefix}_${binary_name}"
}

wrap_binary() {
  # Iff the command is found in the path.
  if command -v $binary_name > /dev/null; then
    wrap
  else
    $rvm_scripts_path/log "error" "Binary '$binary_name' not found in path."
  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

prefix="$1"
if [[ -n "$1" ]]; then shift; fi

binaries="$(echo "$@" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')"

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_ruby_string="${ruby_string}"
__rvm_select > /dev/null 2>&1
__rvm_use    > /dev/null 2>&1

__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 "$prefix" ]] ; then
    wrap_binary
    # Symlink it into place.
    if [[ "$binary_name" == "ruby" ]]; then
      ln -sf "$file_name" "$rvm_bin_path/$environment_identifier"
    else
      ln -sf "$file_name" "$rvm_bin_path/$binary_name-$environment_identifier"
    fi
  else
    symlink_binary
  fi
  unset file_name
done

exit $?