#!/bin/bash
# Updates the nm repo's cs version

### Functions
usage()
{
  echo "usage: $0 [-c cs-repo -v version -k kustomization_list] | [-h]"
}

main()
{
  local CS_REPO_NAME=$1
  local VERSION=$2
  local CSLIST_PATH=$3 #"./.github/cslist.txt"
 
  #Get list of repos from cslist.txt
  # Example lines in file: 
  #cs-brx              mat81-dev/brx/brx-2jitsi/kustomization.yaml           cs-brx.git\/\/brx\/brx-2jitsi?ref=
  #cs-brx              mat81-dev/brx/brx-3main/kustomization.yaml            cs-brx.git\/\/brx\/brx-3main?ref=
  
  CSLIST=$(cat $CSLIST_PATH | grep ^$CS_REPO_NAME | tr -s " " | awk -v FS=' ' -v OFS='\t' '/^[^#]/' )
  echo "$CSLIST" #doublequote preserves the shape of the input variable, including endlines
  if [ -z "$CSLIST" ]
  then
    echo "Nothing to update";
    exit;
  fi
  #If we use a for loop, it iterates over spaces too instead of just endlines
  while IFS= read -r CSLIST_LINE; do
    KUST_PATH=$(echo $CSLIST_LINE | tr -s " " | cut -d " " -f 2)
    SEARCH_STRING=$(echo $CSLIST_LINE | tr -s " " | cut -d " " -f 3)
    #Replace repo version in kustomization.yaml
    echo sed -i -e "s/${SEARCH_STRING}.*/${SEARCH_STRING}${VERSION}/" $KUST_PATH
    sed -i -e "s/${SEARCH_STRING}.*/${SEARCH_STRING}${VERSION}/" $KUST_PATH
    git add $KUST_PATH
  done <<< "$CSLIST"

  git commit -m "$CS_REPO_NAME updated to $VERSION"
}

### Starts here
while [ "$1" != "" ]; do
    case $1 in
        -c | --cs-repo )        shift
                                CS_REPO_NAME=$1
                                ;;
        -v | --version )        shift
                                VERSION=$1
                                ;;
        -k | --kustomization_list )        shift
                                CSLIST_PATH=$1
                                ;;
        -h | --help )           usage
                                exit
                                ;;
        * )                     usage
                                exit 1
    esac
    shift
done

if [[ -z $CS_REPO_NAME || -z $VERSION || -z $CSLIST_PATH ]]
then
  echo "Not enough arguments"
  usage
  exit
fi  

main "$CS_REPO_NAME" "$VERSION" "$CSLIST_PATH"