make this script actually work

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@137640 65c4cc65-6c06-0410-ace0-fbb531ad65f3

build_tools/prep_tarball

@@ -8,11 +8,16 @@
 make -C sounds MENUSELECT_CORE_SOUNDS=CORE-SOUNDS-EN-GSM MENUSELECT_MOH=MOH-FREEPLAY-WAV WGET=wget DOWNLOAD=wget all
 make AWK=awk GREP=grep menuselect-tree
 
+make_tex_docs() {
+    # make backup of asterisk.tex because we are going to alter it
+    cp asterisk.tex asterisk.tex.orig
+    sed -e "s/ASTERISKVERSION/${VERSION}/" asterisk.tex > asterisk_local.tex
+    mv asterisk_local.tex asterisk.tex
+    rubber --pdf asterisk.tex
+    latex2html asterisk.tex
+    # restore backup of asterisk.tex
+    mv asterisk.tex.orig asterisk.tex
+}
+
 VERSION=`cat .version`
-# make backup of asterisk.tex because we are going to alter it
-cp asterisk.tex asterisk.tex.orig
-sed -e "s/ASTERISKVERSION/${VERSION}/" doc/tex/asterisk.tex > doc/tex/asterisk_local.tex
-mv asterisk_local.tex asterisk.tex
-cd doc/tex && rubber --pdf asterisk.tex && latex2html asterisk.tex
-# restore backup of asterisk.tex
-mv asterisk.tex.orig asterisk.tex
+cd doc/tex && make_tex_docs