add script for pulling revs from upstream

pullrev.sh

@@ -0,0 +1,51 @@
+#!/bin/sh
+
+if [ $# -lt 1 ]; then
+    echo "What?"
+    exit 1
+fi
+
+repo="https://svn.apache.org/repos/asf/httpd/httpd/trunk"
+ver=2.4.2
+prefix="httpd-${ver}"
+suffix="r$1${2:++}"
+fn="${prefix}-${suffix}.patch"
+vcurl="http://svn.apache.org/viewvc?view=revision&revision="
+
+if test -f ${fn}; then
+    mv -v -f ${fn} ${fn}\~
+    sed '/^--- /,$d' < ${fn}\~ > ${fn}
+else
+    echo > ${fn}
+fi
+
+new=0
+for r in $*; do
+   if ! grep -q "${vcurl}${r}" ${fn}; then
+       echo "${vcurl}${r}"
+       new=1
+   fi
+done >> ${fn}
+
+[ $new -eq 0 ] || echo >> ${fn}
+
+prev=/dev/null
+for r in $*; do
+    echo "+ fetching ${r}"
+    this=`mktemp /tmp/pullrevXXXXXX`
+    svn diff -c ${r} ${repo} | filterdiff --remove-timestamps --addprefix="${prefix}/" > ${this}
+    next=`mktemp /tmp/pullrevXXXXXX`
+    combinediff --quiet ${prev} ${this} > ${next}
+    rm -f "${this}"
+    [ "${prev}" = "/dev/null" ] || rm -f "${prev}"
+    prev=${next}
+done
+
+cat ${prev} >> ${fn}
+
+vi "${fn}"
+echo "+ git add ${fn}" 
+git add "${fn}"
+echo "+ spec template:"
+echo "PatchN: ${fn}"
+echo "%patchN -p1 -b .${suffix}"