edit svn properties using sed

svnpropsed.rb

#!/usr/bin/env ruby
# -*- coding:utf-8 -*-
SCRIPT_NAME=$0
if ARGV.size != 3
  puts "USAGE: #{SCRIPT_NAME} PROPNAME SED_SCRIPT TARGET"
  exit 1
end

svn = 'svn'
propname, sed_script, target=ARGV

require 'tempfile'
tmp = Tempfile::new(SCRIPT_NAME); tmp.close

`#{svn} propget #{propname} #{target} | sed -e '/^$/d' > #{tmp.path}`
`sed -i -e '#{sed_script}' #{tmp.path}`
`#{svn} propset #{propname} -F #{tmp.path} #{target}`

tmp.open; tmp.close!