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#!/usr/bin/env bash

VERSION="0.0.1"
CONFIG=./deploy.conf
WD=.

#
# Output usage information.
#

usage() {
  cat <<-EOF

  Usage: deploy [options] [command]

  Options:

    -C, --chdir <path>   change the working directory to <path>
    -c, --config <path>  set config path defaults to ./deploy.conf
    -V, --version        output program version
    -h, --help           output help information

  Commands:

    config [key]         output config file or [key]

EOF
}

#
# Abort with <msg>
#

abort() {
  echo $@ 1>&2
  exit 1
}

#
# Log <msg>.
#

log() {
  echo "... $@"
}

#
# Set configuration file <path>.
#

set_config_path() {
  test -f $1 || abort 'invalid --config path'
  CONFIG=$1
}

#
# Get config value by <key>.
#

config_get() {
  local key=$1
  test -n "$key" && grep "^$key" $CONFIG | cut -d ' ' -f 2
  exit 0
}

#
# Output version.
#

version() {
  echo $VERSION && exit 1
}

#
# Output config or [key].
#

config() {
  if test $# -eq 0; then
    cat $CONFIG
    exit 0
  else
    config_get $1
  fi
}

#
# Deploy.
#

deploy() {
  echo
  log deploying $WD
  local url="`config_get user`@`config_get addr`"
  log to $url
  local key=`config_get key`
  test "$WD" != "." && cd $WD && log cd $WD
  local tag=`git describe --tags`
  log release $tag
  echo
}

test $# -eq 0 && deploy && exit 0

# parse argv

while test $# -ne 0; do
  arg=$1; shift
  case $arg in
    -h|--help) usage ;;
    -V|--version) version ;;
    -c|--config) set_config_path $1 ;;
    -C|--chdir) WD=$1 ;;
    config) config $@ ;;
  esac
done

deploy

key ~/.whateves.pem
user deployer-of-doom
addr n.n.n.n