Get dependency list from RPM spec in bash.

rpmspec_depends.sh

# Read dependency information from rpmbuild/SPECS/*.spec.
# % cat rpmbuild/SPECS/*.spec | rpmspec_depends
function rpmspec_depends() {
  # 0. remove redhat meta variables.
  # 1. convert space list to line list.
  # 2. remove trailing spaces.
  # 3. remove debian meta variables. i.e. ${shlib:Depends}
  # 4. remove version conditions.
  # 5. remove wakame-vdc packages.
  awk -F: '$1 == "BuildRequires" || $1 == "Requires" { print substr($0, length($1)+2)}' | \
    egrep -v '%|=' |\
    sed -e 's|\s* \s*|\n|g' | \
    sed -e 's/^[ ]*//g' -e 's/[ ]*$//' | \
    sed -e '/\$/d' | \
    sed  -e 's|[\(].*[\)]||g' | \
    sort | uniq | \
    egrep -v '^wakame-vdc'
}