#!/bin/sh

# git clone http://pkgs.fedoraproject.org/cgit/cups.git/ $FCDISTRO
# TODO not trusty, but last
# wget `wget -q -O- 'http://packages.ubuntu.com/trusty/cups' | grep 'debian.tar.gz' | sed 's@.*href="\([^"]*\).*@\1@'`

NAME="cups"
TMDISTRO="${TMDISTRO:-$HOME/others}"
FCDISTRO="${FCDISTRO:-$TMDISTRO/fc}"
UBDISTRO="${UBDISTRO:-$TMDISTRO/debian}"
SRCSPEC=""
DSTSRC="$HOME/RPM/SOURCES"
PATCHLOG="$DSTSRC/README.patches"
DSTSPEC="$DSTSRC/$NAME.spec"
DSTBUILD="$HOME/RPM/BUILD/`ls $HOME/RPM/BUILD/ | tail -1`"
FCID="FC"
UBID="Ubuntu"
UNUSED_FC="
cups-multilib.patch
cups-serverbin-compat.patch
cups-uri-compat.patch
"
UNUSED_UB="
drop_unnecessary_dependencies.patch
logfiles_adm_readable.patch
fixes-for-jobs-with-multiple-files-and-multiple-formats.patch
cupsd-upstart-support.patch
cupsd-exit-on-idle-upstart.patch
revert-upstream-change-to-FINAL_CONTENT_TYPE-to-fix-printing-to-remote-CUPS-servers.patch
cupsd-set-default-for-SyncOnClose-to-Yes.patch
"
FAILED_UB="
ppdc-dynamic-linking.patch
manpage-hyphen-minus.patch
cups-snmp-oids-device-id-hp-ricoh.patch
mention-rfc2911-in-ipptoolfile-for-clarity.patch
man-cups-lpd-drop-dangling-references.patch)
manpage-translations.patch
"

mkdir -p "$TMDISTRO"
test -d "$FCDISTRO" || git clone git://pkgs.fedoraproject.org/cups.git "$FCDISTRO"
test -d "$UBDISTRO" || wget -q -O- `wget -q -O- 'http://packages.ubuntu.com/trusty/cups' | grep 'debian.tar.gz' | sed 's@.*href="\([^"]*\).*@\1@'` | tar -xz -C "$TMDISTRO" -f -

mkdir -p "$DSTSRC"
for S in $NAME.spec $HOME/RPM/SPECS/$NAME.spec; do
  test -r $S && { SRCSPEC="$S"; break; }
done

delGENpatches() { # e-regexp
  local F="$1" T
  shift
  for T; do
    sed -i -r '/^## '"$T"' /,/^## /{
    /^## '"$T"' /a
    /^[^#]|^[[:space:]]*$|^#+patch/d
    }' "$F"
  done
}

insPatch() { # patchfile patchargs commented distro patchdir
  local a DID="$4" DPD="$5"
  local pn="$DID-${1#cups-}"
  test "$3" == "" && a="%" || a="$3"

  sed -ri "
  /^## $DID patches/,/^$/{
    /^$/iPatch$NPATCH: $pn
  }" "$DSTSPEC" &&
  sed -ri "
  /^## $DID apply patches/,/^$/{
    /^$/i${a}patch$NPATCH $2
  }" "$DSTSPEC" &&
  cp "$DPD/$1" "$DSTSRC/$pn" &&
  echo "$a $DID $1" >> "$PATCHLOG"
  NPATCH="$(($NPATCH + 1))"
}

chkDebPatches() { # patchdir dir [patch parameters]
  local P="`realpath "$1"`" D="`realpath "$2"`"
  shift; shift
  cd "$D"; pwd
  git init
  git config user.email "you@example.com"
  git config user.name "Your Name"
  git add .
  git commit -a -q -m "INIT" || :
  git tag -d INIT || : > /dev/null 2>&1
  git tag INIT || return 1
  for p in `grep "^[^#].*[.]patch$" "$P/series"`; do
    echo "### $p" >&2
    if patch "$@" < "$P/$p" >&2 ; then
      git add .
      # > /dev/null
      git commit -a -q -m "$p"
      echo "$p"
    else
      git reset -q --hard
      git clean -qfd
      echo "## $p"
    fi
  done
}

chkPatchGone() { # patches where_to_check [name]
  for p in $1; do
    fgrep -q "$p" "$2" || echo "Warning: $p is not fount in ${3:-$2}"
  done
}

cp "$SRCSPEC" "$DSTSPEC"
delGENpatches "$DSTSPEC" "$FCID" "$UBID"
:>"$PATCHLOG"

# FC
rm -f "$DSTSRC/$FCID-"*

# store FC names
eval `sed -rn 's/^(Patch[[:digit:]]+):[[:space:]]+(.+)/\1="\2";/p' "$FCDISTRO/$NAME.spec"`

# apply FC patches
NPATCH="1"
egrep '^%patch[[:digit:]]+[[:space:]]' "$FCDISTRO/$NAME.spec" | 
  while read cmd args; do
    n="${cmd#%patch}"
    eval 'f="$Patch'$n'"'
    echo "$UNUSED_FC" | fgrep -q "$f" && unused="#" || unused=""
    insPatch "$f" "$args" "$unused" $FCID "$FCDISTRO"
  done
chkPatchGone "$UNUSED_FC" "$FCDISTRO/$NAME.spec" FC

# TODO apply UB patches
NPATCH="101"
for f in `grep "^[^#].*[.]patch$" "$UBDISTRO/patches/series"`; do
  if echo "$UNUSED_UB" | fgrep -q "$f"; then
    unused="#"
  elif  echo "$FAILED_UB" | fgrep -q "$f"; then
    unused="##"
  else
    unused=""
  fi
  insPatch "$f" "-p1" "$unused" "$UBID" "$UBDISTRO/patches"
done
chkPatchGone "$UNUSED_UB" "$UBDISTRO/patches/series" Ubuntu
#chkDebPatches "$UBDISTRO/patches" "$DSTBUILD" -p 1 2> $HOME/.log.tmp