#!/bin/bash

# contains functions used by more than one script

# find the PKGBUILD of a given package in a given repository
# TODO:
#  mangle $arch in PKBUILDs to contain i486, i586, i686

find_pkgbuild() {

  local PKGBUILD='' repo file

  if [ -f "${repo_paths["archlinux32"]}/$2/$1/PKGBUILD" ]; then
    # If this package has some modification,
    repo="$(find_git_repository_to_package_repository "$2")"
    if ! [ -d "${repo_paths["${repo}"]}/$1" ]; then
      # create some dummy files if it is also new.
      mkdir -p "${repo_paths["${repo}"]}/$1/repos/$2-x86_64"
      touch "${repo_paths["${repo}"]}/$1/repos/$2-x86_64/PKGBUILD"
    fi
  fi

  for repo in "${!repo_paths[@]}"; do
    if [ "${repo}" == "archlinux32" ]; then
      # this is not a repository of packages
      continue
    fi
    if ! [ -d "${repo_paths["${repo}"]}/$1" ]; then
      continue
    fi
    PKGBUILD="$(
      ls "${repo_paths["${repo}"]}/$1/repos/$2-"*"/PKGBUILD" 2> /dev/null | \
        tr ' ' '\n' | \
        grep -v -- '-i686/PKGBUILD$' | \
        grep -v -- '-\(staging\|testing\)-[^/]\+/PKGBUILD$' | \
        sort | \
        tail -n1
    )"
    if [ -n "${PKGBUILD}" ]; then
      echo "${PKGBUILD}"
      if [ ! -f "${PKGBUILD}.changes-applied" ]; then
        # add i486 to the arch list
        sed '/^arch=[^#]*any/!s|^\(arch=(\)\([^#]*)\)\s*\(#.*\)\?$|\1i486 \2|' -i "${PKGBUILD}"
        if [ -f "${repo_paths["archlinux32"]}/$2/$1/PKGBUILD" ]; then
          # If this package has modifications (or is new), apply them now:
          # append PKGBUILD
          cat "${repo_paths["archlinux32"]}/$2/$1/PKGBUILD" >> \
            "${PKGBUILD}"
          # copy (and overwrite) other files
          for file in "${repo_paths["archlinux32"]}/$2/$1/"*; do
            if [ -f "${file}" ] && [ "${file##*/}" != "PKGBUILD" ]; then
              cp "${file}" "${PKGBUILD%/*}/"
            fi
          done
        fi
        touch "${PKGBUILD}.changes-applied"
      fi
      break
    fi
  done
}

find_repository_with_commit() {

  local repository

  for repository in "${!repo_paths[@]}"; do
    if [ "$(git -C "${repo_paths["${repository}"]}" cat-file -t "$1" 2> /dev/null)" == "commit" ]; then
      echo "${repository}"
      return 0
    fi
  done
  >&2 echo "can't find repository with commit '$1'"
  exit 1

}

find_git_repository_to_package_repository() {

  local repository

  for repository in "${!repo_paths[@]}"; do
    if [ "${repository}" == "archlinux32" ]; then
      continue
    fi
    if [ -n "$(
      (
        ls "${repo_paths["${repository}"]}/"*"/repos" | \
          grep -v ':$' | \
          sed 's|-[^-]\+$||' | \
          sort -u
        echo "$1"
      ) | \
        sort | \
        uniq -d
      )" ]; then
      echo "${repository}"
      return 0
    fi
  done
  >&2 echo "can't find git repository with package repository '$1'"
  exit 1

}