#!/bin/sh
# Shell script to extract the date given a release version and a .doap file

if test "x$1" = "x" -o "x$2" = "x" -o ! -s "$2"; then
  echo "Usage: $0 RELEASE-VERSION-NUMBER DOAP-FILE" >&2;
  exit 1
fi

if ! grep '<Project' "$2" >/dev/null ; then
  echo "$2 does not look lika a .doap file" >&2;
  exit 1
fi

if ! grep "$1" "$2" >/dev/null ; then
  echo "$2 contains no reference to a version $1" >&2;
  exit 1
fi

awk 'BEGIN {x=0}
{
if ($0~"<release>") {x=1; chunk=""}
if (x==1) {
  if ($0~"<revision>") { chunk = chunk $0 }
  if ($0~"<created>") { chunk = chunk $0 }
}
if ($0~"</release>") {x=0; print chunk}
}' < "$2" | \
\
grep '<revision>'"$1"'</revision>' | \
\
sed -e 's/^.*<created>//' -e 's/<\/created>.*$//'