void-updates.sh

#!/bin/sh

set -e

init_src() {
  if ! [ -d $src/.git ]; then
    mkdir -p $src
    git clone -q $repo $src
  fi
}

update_src() {
  printf "updating clone\n"
  GIT_WORK_TREE=$src GIT_DIR=$src/.git git pull -q
  printf "update complete\n"
}

is_meta() {
  (
    cd $src
    ./xbps-src show $1 | grep -q '^build_style:[[:blank:]]*meta$'
  )
}

has_distfiles() {
  (
    cd $src
    ./xbps-src show $1 | grep -q '^distfiles:'
  )
}

is_versioned() {
  case $1 in
    *-git) return 1;;
  esac
  return 0
}

find_pkgs() {
  local f p

  for f in $src/srcpkgs/*; do
    p=$(basename $f)

    if [ ! -h $f ] &&
      [ -f $f/template ] &&
      ! is_meta $p &&
      has_distfiles $p &&
      is_versioned $p; then
      printf -- '%s\n' $p
    fi
  done
}

get_var() {
  grep ^$2= $src/srcpkgs/$1/template | cut -d= -f2- | tr -d "\"'"
}

add_maintainer() {
  local p m
  while IFS= read -r p; do
    m=$(get_var $p maintainer | awk -F\< '{ print $2 }' | tr -d '> ')

    if [ "$m" ]; then
      printf '%s %s\n' $p $dest/updates_$m.txt
    fi
  done
}

get_date() {
  local f=$1
  local p=$2
  local v="$3"
  local lookback=30
  local i dt pf

  for i in $(seq $lookback -1 0); do
    dt=$(date --date="-$i days" +%Y-%m-%d)
    pf=$out/${name}_$dt/$f
    [ -f $pf ] || continue

    if fgrep -q "$p $v" $pf; then
      if [ $lookback -ne $i ]; then
        printf '%s' $dt
      fi
      return 0
    fi
  done
}

add_date() {
  local f=$1
  local p v
  while read -r p v; do
    printf '%s\t%s\t%s\n' $p "$v" "$(get_date $f $p "$v")"
  done
}

add_homepage() {
  local p v
  while read -r p v; do
    printf '%s\t%s\t%s\n' $p "$v" "$(get_var $p homepage)"
  done
}

parallel_check() {
  printf "beginning checks\n"
  xargs -P$procs -L1 /bin/sh -c "
    (cd $src && ./xbps-src update-check \$0) |
    sed -e \"s|\$0-||g\" -e \"s|^|\$0 |\" >> \$1
  "
}

create_summary() {
  local f m

  {
    for f in $dest/updates_*.txt; do
      if [ -s $f ]; then
        m=$(basename ${f%%.txt} | sed 's/updates_//')

        printf '%s\n%s\n' $m $(printf %${#m}s |tr ' ' -)
        sort $f | add_date $(basename $f) | add_homepage | column -t -s"$(printf '\t')"
        printf -- '\n'
      else
        rm -f $f
      fi
    done
  } > $dest.txt
}

create_heading() {
  local d=$(($end - $start))
  local t="Void Updates for $(date +%Y-%m-%d\ %H:%M\ %Z) (took: ${d}s)"
  local s
  s=$(printf %${#t}s |tr ' ' =)

  sed -e "1s/^/$s\n\n/" -e "1s/^/$t\n/" -i $dest.txt
}

make_current() {
  ln -vsf  ${dest##*/}.txt $out/$name.txt
  ln -vsfn  ${dest##*/} $out/$name
}

while getopts "p:r:s:o:" opt; do
  case $opt in
    p)
      procs=$OPTARG
      ;;
    r)
      repo=$OPTARG
      ;;
    s)
      src=$OPTARG
      ;;
    o)
      out=$OPTARG
      ;;
  esac
done

[ "$procs" ] || procs=1
[ "$repo" ]
[ "$src" ]
[ "$out" ]

name=$(basename $0)
date=$(date +%Y-%m-%d)
dest=$out/${name}_$date

mkdir -p $dest

{
  start=$(date +%s)
  init_src
  update_src
  find_pkgs | add_maintainer | parallel_check
  create_summary
  end=$(date +%s)
  create_heading
  make_current
} 2> $dest/_log.txt