#! /bin/bash -e
# /usr/lib/emacsen-common/packages/install/debian-el

# Written by Jim Van Zandt <jrv@vanzandt.mv.com>, borrowing heavily
# from the install scripts for gettext by Santiago Vila
# <sanvila@ctv.es> and octave by Dirk Eddelbuettel <edd@debian.org>.
#
# Patched by Roland Mas <lolando@debian.org> to add support for lists of
# flavor-dependently included/excluded files and by Peter S Galbraith
# <psg@debian.org> to add a STAMPFILE (to only byte-compile once) and
# APPEND_LOAD_PATH ton augment the load-path for byte-compilation.

FLAVOR=$1
PACKAGE=debian-el
STAMPFILE=debian-el.elc

# INCLUDED_emacs20=""
# INCLUDED_emacs21=""
# INCLUDED_xemacs21=""

# Don't byte-compile gnus-BTS.el since it uses gnus macros and will break
# if compiled and then used with different versions of gnus (e.g. as
# shipped wth Emacs vs package separately).
EXCLUDED_emacs20="gnus-BTS.el"
EXCLUDED_emacs21="gnus-BTS.el"
EXCLUDED_xemacs21="gnus-BTS.el"

eval included_here=\$$(echo INCLUDED_$FLAVOR | tr - _)
eval excluded_here=\$$(echo EXCLUDED_$FLAVOR | tr - _)

included_all=$(for i in ${!INCLUDED_*} ; do
    eval echo \$$i
    done | sort -u)

excluded_all=$(for i in ${!EXCLUDED_*} ; do
    eval echo \$$i
    done | sort -u)

if [ ${FLAVOR} = emacs ]; then exit 0; fi

# Install-info-altdir does not actually exist. 
# Maybe somebody will write it.
if test -x /usr/sbin/install-info-altdir; then
    echo install/${PACKAGE}: install Info links for ${FLAVOR}
    install-info-altdir --quiet --section "" "" --dirname=${FLAVOR} /usr/info/${PACKAGE}.info.gz
fi

LOG=`tempfile -pelc_ -s.log -m644`
ELDIR=/usr/share/emacs/site-lisp/${PACKAGE}
ELCDIR=/usr/share/${FLAVOR}/site-lisp/${PACKAGE}
if test -e "${ELCDIR}/${STAMPFILE}"; then
    echo "${PACKAGE} files already compiled in ${ELCDIR}."
    exit
fi
echo install/${PACKAGE}: Handling ${FLAVOR}, logged in ${LOG}

if [ -z "$FLAGS" ] ; then
    FLAGS="-q -no-site-file --no-site-file -batch -l path.el -f batch-byte-compile"
fi

install -m 755 -d ${ELCDIR}
cd ${ELDIR}

# Now to compute the list of files to install...

FILES=$(ls -1 *.el)
# Here we have all of them

PATTERN=""
for i in $included_all $excluded_all ; do
    [ ! -z "$PATTERN" ] && PATTERN="${PATTERN}\|"
    PATTERN="${PATTERN}^$i\$"
done
FILES2=$FILES
if [ ! -z "$PATTERN" ] ; then
    FILES=$(for i in $FILES2 ; do echo $i | grep -v $PATTERN || true ; done)
fi
# Here we only have those not explicitly included or excluded by any flavour

FILES="$FILES $included_here"
# Here we also have those included for the current flavour

for i in $excluded_all ; do
    include_i="yes"
    for j in $excluded_here ; do
	[ $i = $j ] && include_i="no"
    done
    [ $include_i = "yes" ] && FILES="$FILES $i"
done
# And now we have those excluded by other flavours but not the current one

FILES=$(for i in $FILES ; do echo $i ; done | sort -u)
# And now for my last trick...  The list is now uniquified!

cp ${FILES} ${ELCDIR}
cd ${ELCDIR}

cat << EOF > path.el
(setq load-path (cons "." load-path) byte-compile-warnings nil)
EOF
if test "${APPEND_LOAD_PATH}" != ""
then
	cat << EOF >> path.el
(setq load-path (append ${APPEND_LOAD_PATH} load-path))
EOF
fi

echo ${FLAVOR} ${FLAGS} ${FILES} >> ${LOG}
"${FLAVOR}" ${FLAGS} ${FILES} >> ${LOG} 2>&1
rm -f *.el path.el

exit 0
