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#autoload

# Usage:
#   _gentoo_repos    -> returns the list of all repos
#   _gentoo_repos -m -> returns the main repo
#   _gentoo_repos -o -> returns the list of non-main repos

_gentoo_repos() {
  local main_repo main_repo_path overlay overlay_paths result

  overlay_paths=();
  result=();

  if [[ -e /usr/share/portage/config/repos.conf || -e /etc/portage/repos.conf ]]; then
    main_repo=$(_repos_conf DEFAULT main-repo)
    main_repo_path=$(_repos_conf ${main_repo} location)

    for overlay in $(_repos_conf -l); do
      overlay_paths+=($(_repos_conf ${overlay} location))
    done

    source /etc/make.conf 2>/dev/null
    source /etc/portage/make.conf 2>/dev/null

    overlay_paths+=(${(@)PORTDIR_OVERLAY})
  else
    source /usr/share/portage/config/make.globals 2>/dev/null
    source /etc/make.conf 2>/dev/null
    source /etc/portage/make.conf 2>/dev/null

    main_repo_path="${PORTDIR}"
    overlay_paths=(${(@)PORTDIR_OVERLAY})
  fi

  if [[ $1 == "-m" ]]; then
    result+=(${main_repo_path})
  elif [[ $1 == "-o" ]]; then
    result+=(${(@)overlay_paths})
  else
    result+=(${main_repo_path} ${(@)overlay_paths})
  fi

  echo ${(u)result}
}

_repos_conf() {
  local v file insection section arr secname

  secname=();

  for file in /usr/share/portage/config/repos.conf \
           /etc/portage/repos.conf \
           /etc/portage/repos.conf/*.conf; do

    [[ -f ${file} ]] || continue
    insection=0
    declare -A arr
    IFS='= '

    while read -r name value; do
      [[ -z ${name} || ${name} == '#'* ]] && continue

      if [[ (${name} == '['*']') && (-z ${value}) ]]; then
        value=${name//(\]|\[)}
        name="section"
      fi
      arr[${name}]=${value}

      if [[ ${insection} == 1 && ${name} == "section" ]]; then
        break
      elif [[ ${name} == "section" ]]; then
        [[ ${value} == ${1} ]] && insection=1
        secname+=(${value})
      elif [[ ${insection} == 1 ]]; then
        if [[ ${name} == ${2} ]]; then
          v=${value}
        fi
      fi
      continue
    done < ${file}
  done

  if [[ ${1} == "-l" ]]; then
    echo "${(@u)secname}"
  else
    echo "${v}"
  fi
}

_gentoo_repos "$@"

# vim: set et sw=2 ts=2 ft=zsh: