Move caching and build-recording code into private part of build.sh

src/include/build.sh

     test -n "$ftype"    || ftype=$(__guess_ftype "$dstpath")
     debug_var srcpath dstpath ftype
     <"$srcpath" __build1_ftype "$ftype" >"$dstpath"
-    rec_built "$dstpath"
+    __rec_built "$dstpath"
 }
 
 __build1_ftype() {
     # arguments).
     #
     local name=$1
-    local_get "$name" && return 0
-    "$name" | local_putb "$name"
-    local_get "$name"
+    __local_get "$name" && return 0
+    "$name" | __local_putb "$name"
+    __local_get "$name"
+}
+
+__local_putb() {
+    #
+    # Make file $1 in $MKIT_LOCAL from stdin and mark as built
+    #
+    local fpath=$1
+    __local_put "$fpath" && __rec_built "$MKIT_LOCAL/$fpath"
+}
+
+__local_put() {
+    #
+    # Make file $1 in $MKIT_LOCAL from stdin
+    #
+    local fpath="$MKIT_LOCAL/$1"
+    { mkdir -p "${fpath%/*}" && cat >"$fpath"; } \
+     || die "cannot write to local cache: $fpath"
+}
+
+__local_get() {
+    #
+    # Read file $1 in $MKIT_LOCAL
+    #
+    local fpath="$MKIT_LOCAL/$1"
+    cat "$fpath" 2>/dev/null
+}
+
+__rec_built() {
+    #
+    # Record file $1 for deletion on `clean`
+    #
+    local file=$1
+    mkdir -p "$MKIT_LOCAL"
+    echo "$file" >> "$MKIT_LOCAL/built.lst"
 }
 
 _mkit_data() {
     mv "${MKIT_PROJ_PKGNAME}-$version.tar.gz" \
        "${MKIT_PROJ_PKGNAME}_$version.orig.tar.gz" \
      || die "could not rename tarball"
-    rec_built "${MKIT_PROJ_PKGNAME}_$version.orig.tar.gz"
+    __rec_built "${MKIT_PROJ_PKGNAME}_$version.orig.tar.gz"
 
     # read content of each mandatory file from debian_skel
     #
             mkdir -p "$(dirname "$dftgt")"
             __build1 "$dfsrc" "$dftgt" debstuff
         done
-    rec_built debian
+    __rec_built debian
 }
 
 dist() {
     echo -n "$git_lasthash" > "$dirname/.mkit/git_lasthash"
     tar -cf "$dirname.tar" "$dirname"
     gzip -f "$dirname.tar"      # see above FIXME
-    rec_built "$dirname.tar.gz"
+    __rec_built "$dirname.tar.gz"
     rm -rf "$dirname"
 }
 

src/include/mkit.sh

      || die "bad mkit.ini version: $their_ver does not match $MKIT_VERSION"
 }
 
-local_putb() {
-    #
-    # Make file $1 in $MKIT_LOCAL from stdin and mark as built
-    #
-    local fpath=$1
-    local_put "$fpath" && rec_built "$MKIT_LOCAL/$fpath"
-}
-
-local_put() {
-    #
-    # Make file $1 in $MKIT_LOCAL from stdin
-    #
-    local fpath="$MKIT_LOCAL/$1"
-    { mkdir -p "${fpath%/*}" && cat >"$fpath"; } \
-     || die "cannot write to local cache: $fpath"
-}
-
-local_get() {
-    #
-    # Read file $1 in $MKIT_LOCAL
-    #
-    local fpath="$MKIT_LOCAL/$1"
-    cat "$fpath" 2>/dev/null
-}
-
 mkit_init() {
     #
     # Do basic initialization
     __chkiniversion
 }
 
-rec_built() {
-    #
-    # Record file $1 for deletion on `clean`
-    #
-    local file=$1
-    mkdir -p "$MKIT_LOCAL"
-    echo "$file" >> "$MKIT_LOCAL/built.lst"
-}
-
 route() {
     #
     # Call correct function based on $1