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#!/bin/bash

DEP_FILE=""
#DEP_FILE="req.txt"
LOG_FILE=""
#LOG_FILE="errors.log"
function print_log {
  if [[ "$LOG_FILE" != "" ]]; then
    echo "$1" >> $LOG_FILE
  fi
}

## Loop for get build components dependencies
echo "" > list_to_check
echo "" > final_list
sed -i '/^[ \t]*$/d' list_component
echo "" >> list_component
echo "" > temp
while read comp; do
  ## Skip empty line
  if [[ "" == "\$comp" ]]; then
    continue
  fi 
  echo -e "\033[33m =====> Getting depends for $comp... \033[0m"
  res=$(apt-rdepends --build-depends --follow=DEPENDS $comp)
  echo "$res" | grep 'Build-Depends:' > tmp
  echo "$res" | grep 'Build-Depends-Indep:' >> tmp
  sed 's/^[ \t]*Build-Depends:[ \t]*//; s/^[ \t]*Build-Depends-Indep:[ \t]*//' tmp | sed 's/[ \t]*(.*)[ \t]*$//' >> temp
  rm -f tmp
  if [[ "$DEP_FILE" != "" ]]; then 
    sed "s/^/$comp:/g" temp >> $DEP_FILE
  fi
done < list_component

## Preparation of initial list of dependencies
sort -u temp > list_to_check
sed -i '/^[ \t]*$/d' list_to_check
end=$(cat list_to_check)
echo "" >> list_to_check

mkdir /data/repo/pkg/_tdir
apt-get -R /data/repo/pkg/_tdir update

## Loop for get packages dependencies
while [[ "$end" != "" ]]; do
  echo "" > temp
  while read comp; do
    ## Skip empty line
    if [[ "" == "$comp" ]]; then
      continue
    fi
    ## Skip packages that are already checked for dependencies
    res=$(grep "^[ \t]*$comp[ \t]*\$" final_list)
    if [[ "" != "$res" ]]; then
      continue
    fi
    echo "=====> Getting depends for $comp..."
    apt-get -R /data/repo/pkg/_tdir install --dry-run $comp | grep "^Inst " | sed 's/^Inst //; s/ .*$//' >> temp
    ##apt-cache depends --no-pre-depends --no-recommends --no-suggests --no-conflicts --no-breaks --no-replaces --no-enhances apt-cache depends --no-pre-depends --no-recommends --no-suggests --no-conflicts --no-breaks --no-replaces --no-enhances $comp | sed 's/^[ \t|]*Depends: //; /</d; s/^[ \t]*//' | sed 's/^[ \t|]*Depends: //; /</d; s/^[ \t]*//' >> temp
    ## Add checked package to the list of already checked packages
    echo "$comp" >> final_list
    if [[ "$DEP_FILE" != "" ]]; then
      sed "s/^/$comp:/g" temp >> $DEP_FILE
    fi
  done < list_to_check

  ## Remove repeated records from the list
  sort -u temp > list_to_check
  ## Remove empty lines if any
  sed -i '/^[ \t]*$/d' list_to_check
  sed -i '/^[ \t]*$/d' final_list
  end=$(cat list_to_check)
  echo "" >> list_to_check
done

## Loop for check and download dependencies
rmdir /data/repo/pkg/_tdir
sed -i '/^[ \t]*$/d' final_list
sort -u final_list > temp
mv -f temp final_list
echo "" >> final_list
rm -f list_to_check
while read pkg; do
  if [[ "" == "$pkg" ]]; then
    continue
  fi
  echo -e "\033[36m =====> Check $pkg... \033[0m"
  ## Check if a package exists
  res=$(apt-cache show $pkg | grep "Package: $pkg")
  if [[ "$res" != "" ]]; then
    ## Download existed package
    echo -e "\033[35m =====> Downloading package $pkg... \033[0m"
    res=$(apt-get -R /data/repo/pkg/_tdir download $pkg | grep "E:" | sed -n 's/E://')
    if [[ "$res" == "" ]]; then
      print_log "$pkg : OK"
    else
      echo -e "\033[31;1;4m $res \033[0m"
      print_log "$pkg: $res"
      if [[ "$DEP_FILE" != "" ]]; then
        echo "=======================================" >> errors.log
        echo "$pkg: $res" >> errors.log
        grep ":$pkg" $DEP_FILE >> errors.log
      fi
    fi
  else
    ## Put error message if package doesn't exist
    echo -e "\033[31;1;4m$pkg: No package found \033[0m"
    print_log "$pkg: No package found"
    if [[ "$DEP_FILE" != "" ]]; then
      echo "=======================================" >> errors.log
      echo "$pkg: No package found" >> errors.log
      grep ":$pkg" $DEP_FILE >> errors.log
    fi
  fi
done < final_list

## Downloading *.deb packages
echo -e "\033[32;1m =====> Uploading *.deb packages... \033[0m"
reprepro -b /data/repo --export=never -C main includedeb du2-prebuild /data/repo/pkg/*.deb

## Loop for download sources
while read component; do
  if [[ "" == "$component" ]]; then
    continue
  fi
  echo -e "\033[33;1m =====> Downloading sources for $component... \033[0m"
  apt-get source --download-only $component
  echo -e "\033[32;1m =====> Uploading sources for $component... \033[0m"
  reprepro -b /data/repo --export=never -C main includedsc du2-prebuild $component*.dsc
  rm -rf $component*
done < list_component

## Creating index for local repo
echo -e "\033[32;1m =====> Creating indices for local repo... \033[0m"
reprepro -Vb /data/repo export du2-prebuild
echo -e "\033[32;1m =====> DONE \033[0m"
if [[ "$LOG_FILE" != "" ]]; then
  echo "Downloaded package list is put to $LOG_FILE"
fi