# Copyright 2019 The Go Authors. All rights reserved.
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file.

# Library of useful bash functions and variables.

RED=; GREEN=; YELLOW=; NORMAL=;
MAXWIDTH=0

if tput setaf 1 >& /dev/null; then
  RED=`tput setaf 1`
  GREEN=`tput setaf 2`
  YELLOW=`tput setaf 3`
  NORMAL=`tput sgr0`
  MAXWIDTH=$(( $(tput cols) - 2 ))
fi

EXIT_CODE=0

info() { echo -e "${GREEN}$@${NORMAL}" 1>&2; }
warn() { echo -e "${YELLOW}$@${NORMAL}" 1>&2; }
err() { echo -e "${RED}$@${NORMAL}" 1>&2; EXIT_CODE=1; }

die() {
  err $@
  exit 1
}

# runcmd prints an info log describing the command that is about to be run, and
# then runs it. It sets EXIT_CODE to non-zero if the command fails, but does not exit
# the script.
runcmd() {
  msg="$@"
  # Truncate command logging for narrow terminals.
  # Account for the 2 characters of '$ '.
  if [[ $MAXWIDTH -gt 0 && ${#msg} -gt $MAXWIDTH ]]; then
    msg="${msg::$(( MAXWIDTH - 3 ))}..."
  fi

  info "\$ $msg"
  $@ || err "command failed"
}

find_deploy_config() {
  for path in deploy/deploy-env.yaml ../deploy/deploy-env.yaml ../../deploy/deploy-env.yaml; do
    if [[ -f $path ]]; then
      echo $path
      return 0
    fi
  done
  return 1
}

get_go_version() {
  local config_file=$(find_deploy_config)
  if [[ -n $config_file ]]; then
    grep '_GO_VERSION:' "$config_file" | head -n 1 | awk '{print $2}'
  fi
}