#!/usr/bin/env bash
#
# Summary: Package an installed Python version as a relocatable binary (experimental)
#
# Usage: pyenv binary <command> [<args>]
#
# `pyenv binary` packages an already-installed Python version into a relocatable
# archive that can be installed on another machine. It is experimental and does
# not touch `pyenv install' or any other command.
#
# Run `pyenv binary' to list its commands, or `pyenv binary <command> --help'
# for command-specific help.
#
set -e
[ -n "$PYENV_DEBUG" ] && set -x

libexec="${BASH_SOURCE%/*}/../libexec"

# The pyenv launcher only puts a plugin's bin on PATH, but `pyenv-help' looks a
# command up there. Add our libexec so the subcommands, and the help text they
# print, can be found.
export PATH="${libexec}:${PATH}"

list_commands() {
  local path
  for path in "$libexec"/pyenv-binary-*; do
    [ -e "$path" ] && echo "${path##*/pyenv-binary-}"
  done
}

# Provide pyenv completions
if [ "$1" = "--complete" ]; then
  shift
  if [ -z "$1" ]; then
    list_commands
  else
    command_path="${libexec}/pyenv-binary-$1"
    shift
    [ -x "$command_path" ] && exec "$command_path" --complete "$@"
  fi
  exit
fi

subcommand="$1"
if [ -z "$subcommand" ]; then
  { pyenv-help binary
    echo
    echo "Commands:"
    list_commands | sed 's/^/   /'
  } >&2
  exit 1
fi
shift

command_path="${libexec}/pyenv-binary-${subcommand}"
if [ ! -x "$command_path" ]; then
  echo "pyenv-binary: no such command \`${subcommand}'" >&2
  exit 1
fi

if [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
  exec pyenv-help "binary-${subcommand}"
fi

exec "$command_path" "$@"