common

#!/bin/bash

# https://stackoverflow.com/a/2684300
if [[ "${BASH_SOURCE[0]}" = "${0}" ]]; then
  echo "[error] script \"$0\" is intended to be sourced, not executed directly"
  exit 1
fi

# Get directory of current script:
#
#     https://stackoverflow.com/a/12694189/2103996

# and convert to absolute path:
#
#     https://stackoverflow.com/a/4045350/2103996
#
REPO_ROOT=$(cd "${BASH_SOURCE%/*}/.." && pwd)

BIN_DIR="$REPO_ROOT/bin"

export PATH="$BIN_DIR":$PATH

# https://stackoverflow.com/a/5947802/2103996
BOLD='\033[0;1m'
GREEN='\033[1;32m'
PURPLE='\033[1;35m'
RED='\033[1;31m'
RESET='\033[0m'
YELLOW='\033[1;33m'

# No associative arrays in Bash < v4, so can't do:
#
#   declare -A LOG_LEVEL
#
LOG_LEVEL_EMERGENCY=0
LOG_LEVEL_ALERT=1
LOG_LEVEL_CRITICAL=2
LOG_LEVEL_ERROR=3
LOG_LEVEL_WARNING=4
LOG_LEVEL_NOTICE=5
LOG_LEVEL_INFO=6
LOG_LEVEL_DEBUG=7

LOG_LEVEL=$LOG_LEVEL_INFO

for VAR in "$@"
do
  if [[ $VAR = "--debug" ]]; then
    LOG_LEVEL=$LOG_LEVEL_DEBUG
    DEBUG=1
  elif [[ $VAR = "--quiet" || $VAR = "-q" ]]; then
    LOG_LEVEL=$LOG_LEVEL_ERROR
    unset DEBUG
  fi
done

log_debug() {
  if [[ $LOG_LEVEL -ge $LOG_LEVEL_DEBUG ]]; then
    echo -e "${PURPLE}[debug]  ${RESET} $*" > /dev/stderr
  fi
}

log_error() {
  if [[ $LOG_LEVEL -ge $LOG_LEVEL_ERROR ]]; then
    echo -e "${RED}[error]  ${RESET} $*" > /dev/stderr
  fi
}

log_info() {
  if [[ $LOG_LEVEL -ge $LOG_LEVEL_INFO ]]; then
    echo -e "${BOLD}[info]   ${RESET} $*" > /dev/stderr
  fi
}

log_notice() {
  if [[ $LOG_LEVEL -ge $LOG_LEVEL_NOTICE ]]; then
    echo -e "${GREEN}[notice] ${RESET} $*" > /dev/stderr
  fi
}

log_warn() {
  if [[ $LOG_LEVEL -ge $LOG_LEVEL_WARNING ]]; then
    echo -e "${YELLOW}[warning]${RESET} $*" > /dev/stderr
  fi
}