#!/bin/bash

#Validate input:
if [ -z "$1" ]; then
  echo "Github user not provided" && exit 1
fi

if [ -z "$2" ]; then
  echo "Github project not provided" && exit 1
fi

#Get token:
if [ -z "$CHANGELOG_GITHUB_TOKEN" ]; then
  echo 'Unable to find your github credentials token, please make sure your $CHANGELOG_GITHUB_TOKEN variable is set, or pass a path to a credentials file.' && exit 1
else
  if [ ! -z "$3" ]; then
    if [ ! -f "$3" ]; then
      echo "Unable to fetch credentials, the file either does not exist, or is not an actual file." && exit 1
    else
      source "$3"
    fi
  else
    echo 'Unable to find your github credentials file, please double check the file exists and has the $CHANGELOG_GITHUB_TOKEN variable set.' && exit 1
  fi
fi

#Check for output option:
CLOUT="CHANGELOG.md"

#Generate changelog:
github_changelog_generator -u "$1" -p "$2" --output "$CLOUT"