#!/bin/bash

###
### nux-runner is environment runner for nux-env enhanced bash scripts
### and provides out of the box support for task-style scripts
### (similar in usage such as apt, git).
###
function is_function () {
  declare -f "$1" &>/dev/null && return 0
  return 1
}

log.debug() {
  :
}

run_task() {
  TASK=$1; shift; # Determines task
  if is_function task_$TASK ; then
    log.debug "Running task: $TASK";
    task_$TASK "$*" # Runs task
  else
      log.debug "Including script: $NUX_SCRIPT"
      source $NUX_SCRIPT; # Includes script

      if is_function task_$TASK ; then
        log.debug "Running task: $TASK";
        task_$TASK "$*" # Runs task
      else
        echo "$SCRIPTNAME: Unrecognized task  ''$TASK' not available."
        echo "Try '$SCRIPTNAME help' for more information."
        exit -1
      fi
  fi
}

##
## Tasks provided by 'nux-runner':


##  debug - Runs specified task with debug messages enabled.
task_debug() {
  log.debug() {
    echo "[DEBUG] $*" >&2
  }
  run_task "$*"
}

##  help - Shows this help
task_help() {
  echo Usage: $SCRIPTNAME [task] [options]
  grep "^\#\#\#" $NUX_SCRIPT | cut -d\# -f4-
  echo " Available Tasks: "
  grep "^\#\# " $NUX_SCRIPT | cut -d\# -f3-
  grep "^\#\#" $NUX_RUNNER | cut -d\# -f3-
  echo
}

##

task_() {
  task_help
}

NUX_RUNNER=$0;
NUX_SCRIPT=$1; shift; # Determines script
SCRIPTNAME=$(basename $NUX_SCRIPT)

run_task "$*"