dehydrated_line_parse_test.bash

#!/bin/bash

{
cat <<'EOF'
01.example.com

02.example.com alias.example.com

# comment

03.example.com\
alias.example.com\
alias2.example.com\

04.example.com\
alias.example.com

05.example.com \
  alias1.example.com \
  alias2.example.com \
  alias3.example.com \
  # comment \
  alias4.example.com \
  alias5.example.com \
  alias6.example.com

06.example.com \
  # comment
07.example.com
EOF
} | {

DOMAINS_TXT=/dev/stdin

# Different sed version for different os types...
_sed() {
  if [[ "${OSTYPE}" = "Linux" || "${OSTYPE:0:5}" = "MINGW" ]]; then
    sed -r "${@}"
  else
    sed -E "${@}"
  fi
}

reset_configvars() { :; }

  # Generate certificates for all domains found in domains.txt. Check if existing certificate are about to expire
  ORIGIFS="${IFS}"
  IFS=$'\n'
  line=''
  for part in $(<"${DOMAINS_TXT}" tr -d '\r' | awk '{print tolower($0)}' | _sed -e 's/^[[:space:]]*//g' -e 's/[[:space:]]*$//g' -e 's/[[:space:]]+/ /g' -e 's/([^ ])>/\1 >/g' -e 's/> />/g' -e 's/[[:space:]]+\\/\\/'); do
    if [[ "${part: -1}" == '\' ]]; then
      [[ "${part:0:1}" != '#' ]] && line="${line} ${part:0:-1}"
      continue
    elif [[ "${part:0:1}" != '#' ]]; then
      line="${line} ${part}"
    fi
    [[ -z "${line//[[:space:]]/}" ]] && continue
    line="${line:1}"
    reset_configvars
    IFS="${ORIGIFS}"
    alias="$(grep -Eo '>[^ ]+' <<< "${line}" || true)"
    line="$(_sed -e 's/>[^ ]+[ ]*//g' <<< "${line}")"
    aliascount="$(grep -Eo '>' <<< "${alias}" | awk 'END {print NR}' || true )"
    [ ${aliascount} -gt 1 ] && _exiterr "Only one alias per line is allowed in domains.txt!"

    domain="$(printf '%s\n' "${line}" | cut -d' ' -f1)"
    morenames="$(printf '%s\n' "${line}" | cut -s -d' ' -f2-)"
    [ ${aliascount} -lt 1 ] && alias="${domain}" || alias="${alias#>}"
    line=''
    export alias

    [[ -t 1 ]] && domain_display="\x1b[33;1m${domain}\x1b[0m" || domain_display="{domain}"
    if [[ -z "${morenames}" ]];then
      echo -e "Processing ${domain_display}"
    else
      echo -e "Processing ${domain_display} with alternative names: ${morenames}"
    fi
  done
}