#!/bin/bash
##### -*- mode:shell-script; indent-tabs-mode:nil; sh-basic-offset:2 -*-
##### Author: Travis Cross <tc@traviscross.com>

set -e

ddir="."
[ -n "${0%/*}" ] && ddir="${0%/*}"
cd $ddir/../

#### lib

err () {
  echo "$0 error: $1" >&2
  exit 1
}

announce () {
  cat >&2 <<EOF

########################################################################
## $1
########################################################################

EOF
}

xread () {
  local xIFS="$IFS"
  IFS=''
  read $@
  local ret=$?
  IFS="$xIFS"
  return $ret
}

mk_dver () { echo "$1" | sed -e 's/-/~/g'; }
mk_uver () { echo "$1" | sed -e 's/-.*$//' -e 's/~/-/'; }
dsc_source () { dpkg-parsechangelog | grep '^Source:' | awk '{print $2}'; }
dsc_ver () { dpkg-parsechangelog | grep '^Version:' | awk '{print $2}'; }
up_ver () { mk_uver "$(dsc_ver)"; }
dsc_base () { echo "$(dsc_source)_$(dsc_ver)"; }
up_base () { echo "$(dsc_source)-$(up_ver)"; }

find_distro () {
  case "$1" in
    experimental) echo "sid";;
    unstable) echo "sid";;
    testing) echo "wheezy";;
    stable) echo "squeeze";;
    *) echo "$1";;
  esac
}

find_suite () {
  case "$1" in
    sid) echo "unstable";;
    wheezy) echo "testing";;
    squeeze) echo "stable";;
    *) echo "$1";;
  esac
}

#### debian/rules helpers

create_dbg_pkgs () {
  for x in $ddir/*; do
    test ! -d $x && continue
    test "$x" = "tmp" -o "$x" = "source" && continue
    test ! "$x" = "${x%-dbg}" && continue
    test ! -d $x/usr/lib/debug && continue
    mkdir -p $x-dbg/usr/lib
    mv $x/usr/lib/debug $x-dbg/usr/lib/
  done
}

cwget () {
  local url="$1" f="${1##*/}"
  echo "fetching: $url to $f" >&2
  if [ -n "$FS_FILES_DIR" ]; then
    if ! [ -s "$FS_FILES_DIR/$f" ]; then
      (cd $FS_FILES_DIR && wget -N "$url")
    fi
    cp -a $FS_FILES_DIR/$f .
  else
    wget -N "$url"
  fi
}

getlib () {
  local url="$1" f="${1##*/}"
  cwget "$url"
  tar -xv --no-same-owner --no-same-permissions -f "$f"
  rm -f "$f" && mkdir -p $f && touch $f/.download-stamp
}

getlibs () {
  # get pinned libraries
  getlib http://downloads.mongodb.org/cxx-driver/mongodb-linux-x86_64-v1.8-latest.tgz
  getlib http://files.freeswitch.org/downloads/libs/json-c-0.9.tar.gz
  getlib http://files.freeswitch.org/downloads/libs/libmemcached-0.32.tar.gz
  getlib http://files.freeswitch.org/downloads/libs/soundtouch-1.6.0.tar.gz
  getlib http://files.freeswitch.org/downloads/libs/flite-1.5.4-current.tar.bz2
  getlib http://files.freeswitch.org/downloads/libs/sphinxbase-0.7.tar.gz
  getlib http://files.freeswitch.org/downloads/libs/pocketsphinx-0.7.tar.gz
  getlib http://files.freeswitch.org/downloads/libs/communicator_semi_6000_20080321.tar.gz
  getlib http://files.freeswitch.org/downloads/libs/celt-0.10.0.tar.gz
  getlib http://files.freeswitch.org/downloads/libs/opus-0.9.0.tar.gz
  getlib http://files.freeswitch.org/downloads/libs/openldap-2.4.19.tar.gz
  getlib http://download.zeromq.org/zeromq-2.1.9.tar.gz \
    || getlib http://download.zeromq.org/historic/zeromq-2.1.9.tar.gz
  getlib http://files.freeswitch.org/downloads/libs/freeradius-client-1.1.6.tar.gz
  getlib http://files.freeswitch.org/downloads/libs/lame-3.98.4.tar.gz
  getlib http://files.freeswitch.org/downloads/libs/libshout-2.2.2.tar.gz
  getlib http://files.freeswitch.org/downloads/libs/mpg123-1.13.2.tar.gz
  # cleanup mongo
  (
    cd mongo-cxx-driver-v1.8
    rm -rf config.log .sconf_temp *Test *Example
    find . -name "*.o" -exec rm -f {} \;
  )
}

check_repo_clean () {
  git diff-index --quiet --cached HEAD \
    || err "uncommitted changes present"
  git diff-files --quiet \
    || err "unclean working tree"
  git diff-index --quiet HEAD \
    || err "unclean repository"
  ! git ls-files --other --error-unmatch . >/dev/null 2>&1 \
    || err "untracked files or build products present"
}

create_orig () {
  {
    set -e
    local OPTIND OPTARG
    local uver="" bundle_deps=false zl=9e
    while getopts 'bnv:z:' o "$@"; do
      case "$o" in
        b) bundle_deps=true;;
        n) uver="nightly";;
        v) uver="$OPTARG";;
        z) zl="$OPTARG";;
      esac
    done
    shift $(($OPTIND-1))
    [ -z "$uver" ] || [ "$uver" = "nightly" ] \
      && uver="$(cat build/next-release.txt)-n$(date +%Y%m%dT%H%M%SZ)"
    local treeish="$1" dver="$(mk_dver "$uver")"
    local orig="../freeswitch_$dver.orig.tar.xz"
    [ -n "$treeish" ] || treeish="HEAD"
    check_repo_clean
    git reset --hard "$treeish"
    mv .gitattributes .gitattributes.orig
    grep .gitattributes.orig \
      -e '\bdebian-ignore\b' \
      -e '\bdfsg-nonfree\b' \
      | while xread l; do
      echo "$l export-ignore" >> .gitattributes
    done
    if $bundle_deps; then
      (cd libs && getlibs)
      git add -f libs
    fi
    ./build/set-fs-version.sh "$uver" && git add configure.in
    git commit --allow-empty -m "nightly v$uver"
    git archive -v \
      --worktree-attributes \
      --format=tar \
      --prefix=freeswitch-$uver/ \
      HEAD \
      | xz -c -${zl}v > $orig
    mv .gitattributes.orig .gitattributes
    git reset --hard HEAD^ && git clean -fdx
  } 1>&2
  echo $orig
}

set_modules_quicktest () {
  cat > debian/modules.conf <<EOF
applications/mod_commands
EOF
}

create_dsc () {
  {
    set -e
    local OPTIND OPTARG modules_list="" speed="normal"
    while getopts 'm:s:' o "$@"; do
      case "$o" in
        m) modules_list="$OPTARG";;
        s) speed="$OPTARG";;
      esac
    done
    shift $(($OPTIND-1))
    local distro="$(find_distro $1)" orig="$2"
    local suite="$(find_suite $distro)"
    local orig_ver="$(echo "$orig" | sed -e 's/^.*_//' -e 's/\.orig\.tar.*$//')"
    local dver="${orig_ver}-1~${distro}+1"
    [ -x "$(which dch)" ] \
      || err "package devscripts isn't installed"
    if [ -n "$modules_list" ]; then
      set_modules_${modules_list}
    fi
    (cd debian && ./bootstrap.sh -c $distro)
    case "$speed" in
      paranoid) sed -i ./debian/rules \
        -e '/\.stamp-bootstrap:/{:l2 n; /\.\/bootstrap.sh -j/{s/ -j//; :l3 n; b l3}; b l2};' ;;
      reckless) sed -i ./debian/rules \
        -e '/\.stamp-build:/{:l2 n; /make/{s/$/ -j/; :l3 n; b l3}; b l2};' ;;
    esac
    git add debian/rules
    dch -b -m -v "$dver" --force-distribution -D "$suite" "Nightly build."
    git add debian/changelog && git commit -m "nightly v$orig_ver"
    dpkg-source -i.* -Zxz -z9 -b .
    dpkg-genchanges -S > ../$(dsc_base)_source.changes
    local dsc="../$(dsc_base).dsc"
    git reset --hard HEAD^ && git clean -fdx
  } 1>&2
  echo $dsc
}

fmt_debug_hook () {
    cat <<'EOF'
#!/bin/bash
export debian_chroot="cow"
cd /tmp/buildd/*/debian/..
/bin/bash < /dev/tty > /dev/tty 2> /dev/tty
EOF
}

build_debs () {
  {
    set -e
    local OPTIND OPTARG debug_hook=false hookdir=""
    while getopts 'd' o "$@"; do
      case "$o" in
        d) debug_hook=true;;
      esac
    done
    shift $(($OPTIND-1))
    local distro="$(find_distro $1)" dsc="$2" arch="$3"
    if [ -z "$distro" ] || [ "$distro" = "auto" ]; then
      if ! (echo "$dsc" | grep -e '-[0-9]*~[a-z]*+[0-9]*'); then
        err "no distro specified or found"
      fi
      local x="$(echo $dsc | sed -e 's/^[^-]*-[0-9]*~//' -e 's/+[^+]*$//')"
      distro="$(find_distro $x)"
    fi
    [ -n "$arch" ] || arch="$(dpkg-architecture | grep '^DEB_BUILD_ARCH=' | cut -d'=' -f2)"
    [ -x "$(which cowbuilder)" ] \
      || err "package cowbuilder isn't installed"
    local cow_img=/var/cache/pbuilder/base-$distro-$arch.cow
    cow () {
      cowbuilder "$@" \
        --distribution $distro \
        --architecture $arch \
        --basepath $cow_img
    }
    if ! [ -d $cow_img ]; then
      announce "Creating base $distro-$arch image..."
      cow --create
    fi
    announce "Updating base $distro-$arch image..."
    cow --update
    announce "Building $distro-$arch DEBs from $dsc..."
    if $debug_hook; then
      mkdir -p .hooks
      fmt_debug_hook > .hooks/C10shell
      chmod +x .hooks/C10shell
      hookdir=$(pwd)/.hooks
    fi
    cow --build $dsc \
      --hookdir "$hookdir" \
      --buildresult ../
  } 1>&2
  echo ${dsc}_${arch}.changes
}

build_all () {
  local OPTIND OPTARG
  local orig_opts="" dsc_opts="" deb_opts=""
  local archs="" distros="" par=false
  while getopts 'a:bc:djnm:s:v:z:' o "$@"; do
    case "$o" in
      a) archs="$archs $OPTARG";;
      b) orig_opts="$orig_opts -b";;
      c) distros="$distros $OPTARG";;
      d) deb_opts="$deb_opts -d";;
      j) par=true;;
      n) orig_opts="$orig_opts -n";;
      m) dsc_opts="$dsc_opts -m$OPTARG";;
      s) dsc_opts="$dsc_opts -s$OPTARG";;
      v) orig_opts="$orig_opts -v$OPTARG";;
      z) orig_opts="$orig_opts -z$OPTARG";;
    esac
  done
  shift $(($OPTIND-1))
  [ -n "$archs" ] || archs="amd64 i386"
  [ -n "$distros" ] || distros="sid wheezy squeeze"
  local orig="$(create_orig $orig_opts HEAD | tail -n1)"
  mkdir -p ../log
  > ../log/changes
  echo; echo; echo; echo
  if [ "${orig:0:2}" = ".." ]; then
    for distro in $distros; do
      echo "Creating $distro dsc..." >&2
      local dsc="$(create_dsc $dsc_opts $distro $orig 2>../log/$distro | tail -n1)"
      echo "Done creating $distro dsc." >&2
      if [ "${dsc:0:2}" = ".." ]; then
        for arch in $archs; do
          {
            echo "Building $distro-$arch debs..." >&2
            local changes="$(build_debs $deb_opts $distro $dsc $arch 2>../log/$distro-$arch | tail -n1)"
            echo "Done building $distro-$arch debs." >&2
            if [ "${changes:0:2}" = ".." ]; then
              echo "$changes" >> ../log/changes
            fi
          } &
          $par || wait
        done
      fi
    done
    ! $par || wait
  fi
  cat ../log/changes
}

while getopts 'd' o "$@"; do
  case "$o" in
    d) set -vx;;
  esac
done
shift $(($OPTIND-1))

cmd="$1"
shift
case "$cmd" in
  archive-orig) archive_orig "$@" ;;
  build-all) build_all "$@" ;;
  build-debs) build_debs "$@" ;;
  create-dbg-pkgs) create_dbg_pkgs ;;
  create-dsc) create_dsc "$@" ;;
  create-orig) create_orig "$@" ;;
esac