#!/bin/sh -e

show_usage () {
  echo "Usage: `basename $0` <package_name>"
  echo
  echo "`basename $0` searches the CRAN and BioConductor repositories for package with the exact name given as a single argument. It will download, unpack, and prepare all the Debian packaging for the requested packages and all those dependencies that are not yet shipping with Debian."
}

if [ $# -ne 1 ] ; then
  show_usage
  exit 1
fi

if [ "$1" = "-h" -o "$1" = "--help" ] ; then
  show_usage
  exit 1
fi

if [ "$1" = "splines" ] ; then
  echo "I: Package $1 already ships with r-base-core."
  exit 0
fi

if [ "$1" = "stats4" ] ; then
  echo "I: Package $1 already ships with r-base-core."
  exit 0
fi

if ! (which $(basename $0) > /dev/null 2>&1); then
  echo "E: Extending PATH for $(dirname $0)"
  PATH=$PATH:$(dirname "$0")
fi

for tool in cme dh-make-R git
do
  p=$(which $tool||true)
  if [ "" = "$p" ]; then
    echo "E: Missing tool '$tool'"
    exit 1
  fi
done

do_wnpp_check () {
  retval=""
  wnpp=`wnpp-check $wnppname | sed 's/^(.* - #\([0-9]\+\)) http.*/\1/'`
  if [ "$wnpp" != "" ] ; then
    if which psql 2>/dev/null ; then
      newversion=`PGPASSWORD="udd-mirror" psql --port=5432 --host=udd-mirror.debian.net --username=udd-mirror -t udd -c "select version from new_packages where package = '$wnppname' ;"`
      if [ "$newversion" != "" ] ; then
        >&2 echo "W: Package $wnppname is just in Debian new queue waiting for processing"
        retval="new"
      else
        >&2 echo "W: Package $wnppname was ITPed in bug #$wnpp.  Please check http://bugs.debian.org/$wnpp"
        retval="$wnpp"
      fi
    else
      >&2 echo "W: Unable to check whether Package $wnppname is in new.  Please either install postgresql-client-common or inspect https://ftp-master.debian.org/new.html."
    fi
  fi
  echo $retval
}

cranname=$1
pkgname=""
workdir=`pwd`
for repository in bioc cran
do
  pkgname=r-${repository}-`echo $cranname | tr '[A-Z]' '[a-z]'`

  a=$(apt-cache show $pkgname|wc -l)
  if [ 0 -lt $a ]; then
    echo "$a"
    echo "I: Package $pkgname is already known - see 'apt-cache show $pkgname'."
    exit 0
  fi

  if apt-cache policy $pkgname | grep -v "(none)" | grep -q "Installed:" ; then
    echo "I: Package $pkgname is available. Try 'apt-cache policy $pkgname' to find its author."
    exit 0
  fi

  wnppname=$pkgname
  wnppcheck=$( do_wnpp_check )
  if [ "$wnppcheck" = "new" ] ; then
    echo "I: No point to deal with a package which is in new - exitting"
    exit 0
  else
    # If wnpp_check did not found r-cran-NAME try r-bioc
    if [ "$wnppcheck" = "" ] ; then
      wnppname="r-bioc-`echo $cranname | tr '[A-Z]' '[a-z]'`"
      wnppcheck=$( do_wnpp_check )
      if [ "$wnppcheck" = "new" ] ; then
        echo "I: No point to deal with a package which is in new - exitting"
        exit 0
      fi
    fi
  fi
done

if echo $workdir | grep -q CRAN_prospective ; then
  basedir=`echo $workdir | sed 's#\(CRAN_prospective\).*#\1#'`
else
  basedir=`dirname $workdir`/CRAN_prospective
fi
targetdir="$basedir/$pkgname"

for p in "`dirname ${targetdir}`/${cranname}/debian" "$targetdir"
do
  if [ -d "$p" ]; then
    echo "E: Previous packaging attempt for package $cranname exists in '$p'."
    exit 1
  fi
done

createdDirs=""
if [ ! -d "$targetdir" ]; then
  mkdir -p "$targetdir"/debian
  createdDirs="$targetdir"
elif [ ! -d "$targetdir"/debian ]; then
  mkdir $targetdir/debian
  createdDirs="$targetdir/debian"
fi
cd $targetdir

if [ "$DEBFULLNAME" != "" -a "$DEBEMAIL" != "" ] ; then
  AUTHOR="$DEBFULLNAME <${DEBEMAIL}>"
else
  AUTHOR="FIXME: DEBFULLNAME <DEBEMAIL> (you should set these variables in your environment)"
fi

cat > debian/changelog <<EOT
$pkgname (0.0-1) UNRELEASED; urgency=medium

  * Initial release

 -- $AUTHOR  `date -R`
EOT

cat > debian/watch <<EOT
version=4
https://cloud.r-project.org/src/contrib/${cranname}@ANY_VERSION@@ARCHIVE_EXT@
EOT

echo "I: Checking CRAN repository for ${cranname}"
tarball=`uscan --verbose 2>/dev/null | grep ".orig.tar.[gx]z" | sed 's#^.* \(\.\./.*\.orig\.tar\.[gx]z\).*#\1#'`
#echo "I: - testing for '$tarball'"

BIOCDATA=""
if [ "$tarball" = "" ] ; then
  # if nothing was found on CRAN try BioConductor
  echo "I: Checking BioConductor release repository"
  sed -i 's/^r-cran-/r-bioc-/' debian/changelog
  cat > debian/watch <<EOT
version=4
opts=downloadurlmangle=s?^(.*)\.\.?https://bioconductor.org/packages/release/bioc? \
 https://www.bioconductor.org/packages/release/bioc/html/${cranname}.html .*/${cranname}@ANY_VERSION@@ARCHIVE_EXT@
EOT
  tarball=`uscan --verbose 2>/dev/null | grep ".orig.tar.[gx]z" | sed 's#^.* \(\.\./.*\.orig\.tar\.[gx]z\).*#\1#'`
  if [ "$tarball" = "" ] ; then
    echo "I: Checking BioConductor experiment data repository"
    # There is a last resort chance to find the package in BioConductor data area
    cat > debian/watch <<EOT
version=4
opts=downloadurlmangle=s?^(.*)\.\.?https://bioconductor.org/packages/release/data/experiment? https://www.bioconductor.org/packages/release/data/experiment/html/${cranname}.html .*/${cranname}@ANY_VERSION@@ARCHIVE_EXT@
EOT
    tarball=`uscan --verbose 2>/dev/null | grep ".orig.tar.[gx]z" | sed 's#^.* \(\.\./.*\.orig\.tar\.[gx]z\).*#\1#'`
    if [ "$tarball" = "" ] ; then
      echo "I: Checking BioConductor annotation data repository"
      # There is a last resort chance to find the package in BioConductor annotation data area
      cat > debian/watch <<EOT
version=4
opts=downloadurlmangle=s?^(.*)\.\.?https://bioconductor.org/packages/release/data/annotation? https://www.bioconductor.org/packages/release/data/annotation/html/${cranname}.html .*/${cranname}@ANY_VERSION@@ARCHIVE_EXT@
EOT
      tarball=`uscan --verbose 2>/dev/null | grep ".orig.tar.[gx]z" | sed 's#^.* \(\.\./.*\.orig\.tar\.[gx]z\).*#\1#'`
      if [ "$tarball" = "" ] ; then
        echo "E: $cranname was neither found on CRAN nor part of the BioConductor release nor BioConductor annotation/experiment data"
        if [ "" != "$createdDirs" ]; then
          echo "   Please remove directory '$createdDirs'"
        fi
        exit 1
      fi
    fi
    # If this line was reached, then the package was found somewhere in BioConductor
    BIOCDATA="true"
    pkgname=r-bioc-`echo $cranname | tr '[A-Z]' '[a-z]'`
    cp -a debian/watch /tmp/watch_$pkgname
  fi
  pkgname=r-bioc-`echo $cranname | tr '[A-Z]' '[a-z]'`
fi

echo "I: Preparing package '$pkgname'"

cd ..
rm -rf r-cran-`echo $cranname | tr '[A-Z]' '[a-z]'`
tarball=`echo $tarball | sed 's#^\.\./##'`
if [ ! -r "$tarball" ]; then
  echo "I: Something went wrong - expected file '$tarball' in $(pwd)"
  exit 1
fi
echo "I: Untaring '$tarball' in $(pwd)"
tar xaf $tarball
cd $cranname
if [ `find . -iname "test*" | wc -l` -gt 0 ] ; then
  dh-make-R --test run-unit-test 2>/dev/null >/dev/null
else
  dh-make-R 2>/dev/null >/dev/null
fi

echo "I: Preparing debian/control"

# FIXME: dh-r does not know BioC data location yet.
#        This hack restores working watch file and hacks in proper Homepage
# FIXME FIXME: Handling annoation packages still needs to be addressed
if [ "$BIOCDATA" = "true" -a -e /tmp/watch_$pkgname ] ; then
  mv /tmp/watch_$pkgname debian/watch
  # Fix Homepage
  sed -i 's+^\(Homepage.*.org/packages/\)+&data/experiment/+' debian/control
fi

# Hack to get cme formatted d/control
sed -i 's/^Standards-Version: .*/Standards-Version: 4.0.0/' debian/control
cme fix dpkg-control 2>/dev/null >/dev/null || true

if [ `find . -iname "*.rda" -o -iname "*.rdata" | wc -l` -gt 0 ] ; then
  cd debian
  /usr/share/dh-r/create_README.source > README.source
  cd ..
fi

echo "I: Preparing local git repository"
cd ..
gitdir="$basedir/$pkgname"
mkdir $gitdir
cd $gitdir
git init
#newversion=`echo ../$tarball | sed 's/^.*_\([0-9].*\)\.orig\.tar\..*/\1/'`
#gbp import-orig --pristine-tar --upstream-version=$newversion ../$tarball
gbp import-orig --pristine-tar --no-interactive ../$tarball
mv ../$cranname/debian .
git add debian
git commit -a -m"Initial packaging by `basename $0`"
echo "I: Cleaning up"
rm -f ../`readlink ../$tarball`
rm -f ../$tarball
rm -rf ../$cranname

if [ "$wnppcheck" != "" ] ; then
  echo "Please make sure you contact reporter of ITP bug $wnppcheck to sort out the status if the package"
  sed -i "/Initial release/s/xxxxxx/$wnppcheck/" debian/changelog
fi

echo "You can find a packaging repository for $cranname in `pwd`"