#!/bin/sh
# vABS - Versioned Arch Build System
# Version - 1.0
# Estêvão Valadão - estevao@archlinux-br.org
 
##
# Constants
##
DATE=`date`
VABS_ARCH="x86_64"
WORKDIR="$HOME/vabs/vabs_x86_64"
ENABLED_REPOS=(core extra community multilib multilib-testing testing community-testing kde-unstable)
 
##
# Preparation tasks
##
 
# Running abs twice to prevent sync errors
$WORKDIR/bin/abs
$WORKDIR/bin/abs
 
# Checking if tree.md5 exists
if [ ! -f $WORKDIR/tree.md5 ]; then
  touch $WORKDIR/tree.md5
fi
 
# Creating new md5 file for the tree
cd $WORKDIR
find tree -type f -print0 | xargs -0 md5sum > tree.md5.new
 
##
# Versioning
##
 
# Checking for changes in the tree
diff $WORKDIR/tree.md5 $WORKDIR/tree.md5.new > /dev/null
 
# If files/trees are different...
if [ "$?" = 1 ]; then
 
  # Deleting trash in tree_temp (for precaution)
  rm -rf $WORKDIR/tree_temp/*
 
  # Copying files from tree to tree_temp for processing
  cp -r $WORKDIR/tree/* $WORKDIR/tree_temp
 
  for repo in ${ENABLED_REPOS[@]}
  do
 
    DIRNAMES=(`ls $WORKDIR/tree_temp/$repo | xargs`)
 
    for name in ${DIRNAMES[@]}
    do
 
      # Creating directories with first letter of given package (uppercase)
      dir_letter=`echo $name | awk '{ print substr( $0, 0, 1 ) }'`
      dir_letter=`echo $dir_letter | tr '[:lower:]' '[:upper:]'`
      mkdir -p $WORKDIR/tree_temp/$repo/$dir_letter
 
      cd $WORKDIR/tree_temp/$repo/$name
 
      # Creating PKGBUILD.tmp till "pkgver="
      while read line
      do
        echo "$line" | grep pkgrel= > /dev/null
        if [ "$?" = 0 ]; then
          echo "$line" >> PKGBUILD.tmp
          break
        else
          echo "$line" >> PKGBUILD.tmp
        fi
      done <PKGBUILD
 
      # Sourcing PKGBUILD.tmp and removing it
      source PKGBUILD.tmp
      rm PKGBUILD.tmp
 
      # Leaving just the pure version
      pkgver=${pkgver##*=}
 
      # Adding version and pkgrel to the directory name
      cd ../
      mv $name $name-$pkgver-$pkgrel
 
      # Compressing all files in a tarball
      tar -zcvf $name-$pkgver-$pkgrel/$name-$pkgver-$pkgrel.tgz $name-$pkgver-$pkgrel/* > /dev/null  
 
      # Moving directory to the correct category/letter directory
      mv $name-$pkgver-$pkgrel $dir_letter
 
    done
 
  done
 
  # Copying just new files without overwriting old ones (-n option) for directory listing in Apache
  $HOME/bin/cp -rvn $WORKDIR/tree_temp/* $HOME/vabs.archlinux-br.org/$VABS_ARCH
 
  # Renaming md5 file
  mv $WORKDIR/tree.md5.new $WORKDIR/tree.md5
 
  # Deleting files in tree_temp
  rm -rf $WORKDIR/tree_temp/*
 
  # Making git commit and pushing changes to GitHub
  cd $HOME/vabs.archlinux-br.org/$VABS_ARCH
  git add .
  git commit -m "Updated on $DATE"
  git push origin master
 
else
 
  # Removing md5 file
  rm $WORKDIR/tree.md5.new
 
fi