#!/bin/bash

# Uses Git to find the top level directory so that everything can be referenced
# via absolute paths.
setglobal REPO_ROOT = $[git rev-parse --show-toplevel]

if [[ $BOOTSTRAP_METHOD == "vagrant" ]] { 
  proc do_on_node {
    setglobal NODE = $1
    shift
    setglobal COMMAND = $(*)
    echo "EXECUTING on $NODE"
    vagrant ssh $NODE -c $COMMAND
  }
} else {
  # define it here with whatever we would use to SSH to Packer-booted machines
  :
}

proc check_for_envvars {
  setglobal FAILED_ENVVAR_CHECK = '0'
  setglobal REQUIRED_VARS = $(@)
  for ENVVAR in [$(REQUIRED_VARS[@])] {
    if [[ -z ${!ENVVAR} ]] {
      echo "Environment variable $ENVVAR must be set!" > !2
      setglobal FAILED_ENVVAR_CHECK = '1'
    }
  }
  if [[ $FAILED_ENVVAR_CHECK != 0 ]] { exit 1; }
}

proc load_configs{
  # Source the bootstrap configuration defaults and overrides.
  # If the overrides file is at the previous expected location of bootstrap.sh,
  # move it and notify the user.
  if [[ -f "$REPO_ROOT/bootstrap/config/bootstrap_config.sh" ]] {
    if [[ ! -f "$REPO_ROOT/bootstrap/config/bootstrap_config.sh.overrides" ]] {
      echo "Performing one-time move of bootstrap_config.sh to bootstrap_config.sh.overrides..."
      mv $REPO_ROOT/bootstrap/config/bootstrap_config.sh $REPO_ROOT/bootstrap/config/bootstrap_config.sh.overrides
    } else {
      echo "ERROR: both bootstrap_config.sh and bootstrap_config.sh.overrides exist!" > !2
      echo "Please move all overrides to bootstrap_config.sh.overrides and remove bootstrap_config.sh!" > !2
      exit 1
    }
  }

  setglobal BOOTSTRAP_CONFIG_DEFAULTS = ""$REPO_ROOT/bootstrap/config/bootstrap_config.sh.defaults""
  setglobal BOOTSTRAP_CONFIG_OVERRIDES = ""$REPO_ROOT/bootstrap/config/bootstrap_config.sh.overrides""
  if [[ ! -f $BOOTSTRAP_CONFIG_DEFAULTS ]] {
    echo "Bootstrap configuration defaults are missing! Your repository is corrupt; please restore $REPO_ROOT/bootstrap/config/bootstrap_config.sh.defaults." > !2
    exit 1
  }
  source $BOOTSTRAP_CONFIG_DEFAULTS
  if [[ -f $BOOTSTRAP_CONFIG_OVERRIDES ]] { source $BOOTSTRAP_CONFIG_OVERRIDES; }
}