rebar-pre-script

#!/bin/sh

YAWS_DIR=`pwd`
DEFAULT_YAWS_VSN=`sed -ne '1,/^YAWS_VSN=/s/^YAWS_VSN=//p' $YAWS_DIR/vsn.mk 2>/dev/null`
YAWS_VSN=${VSN-$DEFAULT_YAWS_VSN}
YAWS_VARDIR=${VARDIR-$YAWS_DIR/var}
YAWS_ETCDIR=${ETCDIR-$YAWS_DIR/etc}
ERL_BIN=`which erl`
ERL_BIN_DIR=${ERL_BIN%/erl}
YAWS_ERLBINDIR=${ERLBINDIR-$ERL_BIN_DIR}
ERL_BIN=$YAWS_ERLBINDIR/erl
WERL_BIN=$YAWS_ERLBINDIR/werl

script=`basename $0`

# Use a function for error exit instead of set -e so we can conditionally
# remove files before exiting. If this were bash we could trap ERR but
# Bourne shell doesn't support that portably.
fail() {
    [ -n "$@" ] && rm -f "$@"
    exit 1
}

keep_or_replace() {
    if [ -f "$1" ] && cmp -s "$1" "$2"; then
        rm -f "$2"
        return 0
    else
        mv "$2" "$1" || fail "$2"
        return 1
    fi
}

cd src || fail

if [ "$1" = clean ]; then
    rm -f mime_types.erl charset.def yaws_configure.hrl yaws_generated.erl
    exit 0
fi

CHARSET=${DEFAULT_CHARSET-""}
need_mime=yes
if [ -f mime_types.erl ]; then
    need_mime=`find mime_type_c.erl -newer mime_types.erl -print`
fi
if [ -n "$need_mime" ]; then
    echo ${CHARSET} > charset.def || fail
    erlc -o ../ebin mime_type_c.erl || fail charset.def
    erl -pa ../ebin -noshell -s mime_type_c compile || \
        fail charset.def mime_types.erl
fi

if [ ! -f yaws_configure.hrl ]; then
    echo '%% rebar sets HAVE_YAWS_SENDFILE in erlc command line' \
        > yaws_configure.hrl
    [ $? -eq 0 ] || fail
fi
tmpgen=`mktemp /tmp/${script}.XXXXXX` || fail
YAWS_VSN=$YAWS_VSN VARDIR="$YAWS_VARDIR" ETCDIR="$YAWS_ETCDIR" \
    ../scripts/gen-yaws-generated true >$tmpgen || fail
keep_or_replace yaws_generated.erl $tmpgen
[ -d "$YAWS_VARDIR" ] || mkdir "$YAWS_VARDIR" || fail
[ -d "$YAWS_ETCDIR" ] || mkdir "$YAWS_ETCDIR" || fail

cd ../scripts

tmpgen=`mktemp /tmp/${script}.XXXXXX` || fail
VARDIR="${YAWS_VARDIR}" ERLBINDIR="${YAWS_ERLBINDIR}" \
    ERL="${ERL_BIN}" WERL="${WERL_BIN}" ./gen-yaws > $tmpgen || fail
keep_or_replace ../bin/yaws $tmpgen
if [ $? -eq 0 ]; then
    VARDIR="${YAWS_VARDIR}" ./local-install false "${YAWS_DIR}" || fail
else
    chmod +x ../bin/yaws || fail
    VARDIR="${YAWS_VARDIR}" ./local-install true "${YAWS_DIR}" || fail
fi

exit 0