new update-mak.sh tool to help keep Makefile.mak updated

update-mak.sh

@@ -0,0 +1,58 @@
+#!/bin/bash
+# file:        update-mak.sh
+# description: Helper script to update Makefile.mak
+# author:      Andrea Vedaldi
+
+# This script updates Makefile.mak based on the current source tree
+# and version in vl/generic.h. It saves the new version to
+# Makefile.mak.new.
+
+function make
+{
+    # sed below removes the trailing '\' from the last entry
+    (
+        printf '%-69s\\\n' "$1 ="
+        find "$2" -name '*.c' | tr '/' '\' | while read -r x
+        do
+            printf '  %-66s \\\n' "$x"
+        done
+    ) | sed '$s/ *\\$//'
+    echo
+}
+
+function sub
+{
+    # Put substitution text at the beginning. Then sed puts the
+    # beginning in its hold buffer, finds the paragraph starting with
+    # "$2 =", deletes all but the last lines of it and substititue the
+    # last line with the hold buffer. It also removes trailing
+    # whitespaces.
+    (make "$2" "$3" ; echo "$1") | \
+        sed -e '1{h;d;}' \
+            -e '2,/^$/{H;d;}' \
+            -e "/$2 =/,/^$/{/^$/!d;g;}" \
+            -e 's/ *$//'
+}
+
+function subv
+{
+    # Substitutes VER = x.x.x with the new version string.
+    echo "$1" | sed -e "/VER *=/s/\(\([0-9][0-9]*\.\{0,1\}\)\{3\}\)/$2/"
+}
+
+# source version string from vl/generic.h
+ver=$(cat vl/generic.h | sed -n \
+     's/.*VL_VERSION_STRING.*\(\([0-9][0-9]*\.\{0,1\}\)\{3\}\).*/\1/p')
+
+# source current nmake script
+a=$(cat Makefile.mak)
+
+# updaetes version string
+a=$(subv "$a" "$ver")
+
+# updates hard-wired list of source code files in the nmake script
+a=$(sub "$a" libsrc vl)
+a=$(sub "$a" cmdsrc src)
+a=$(sub "$a" mexsrc toolbox)
+
+echo "$a" > Makefile.mak.new