Added prepare step.

Introduced a prepare step for the sources which can be specified
by defining the src_prepare function. e.g. to use patches.
The src_prepare function will be called in the $SRCDIR.

example:

src_prepare() {
	patch -p1 < ${SRC_POOL}/my_src.patch
}

functions.sh

@@ -47,6 +47,17 @@ sit_unpack() {
     src_unpack
 }
 
+
+src_prepare() {
+    /bin/true
+}
+sit_prepare() {
+    sit_info "Preparing sources"
+    cd ${SRCDIR}
+    src_prepare  || sit_fail "Preparing sources failed"
+}
+
+
 src_configure() {
 	${SRCDIR}/configure --prefix=$PREFIX $CONFIGURE_OPTS
     if [ ! -z $LOGDIR ] ; then

sit

@@ -142,7 +142,8 @@ mkdir -p ${WORKDIR}
 mkdir -p ${BUILDDIR}
 mkdir -p ${LOGDIR}
 
-sit_unpack;   2>&1 | tee "$LOGDIR/unpack.log";       ( exit ${PIPESTATUS} )
+sit_unpack    2>&1 | tee "$LOGDIR/unpack.log";       ( exit ${PIPESTATUS} )
+sit_prepare   2>&1 | tee "$LOGDIR/prepare.log";      ( exit ${PIPESTATUS} )
 sit_configure 2>&1 | tee "$LOGDIR/configure.log";    ( exit ${PIPESTATUS} )
 sit_build     2>&1 | tee "$LOGDIR/make.log";         ( exit ${PIPESTATUS} )
 sit_pretest   2>&1 | tee "$LOGDIR/pretest.log";      ( exit ${PIPESTATUS} )