tmpnew = "/tmp/newpkg.log"
tmpold = "/tmp/oldpkg.log"

print("Changelog summaries:\n")

for i, pkg in ipairs(files_install) do
	print("Changes in "..pkgname(pkgs_install[i])..":")
	os.execute("rpm -qp --changelog "..pkg.." > "..tmpnew)
	os.execute("rpm -q --changelog "..pkgname(pkgs_install[i]).." > "..tmpold)
	changes = io.popen("diff -u "..tmpold.." "..tmpnew)
	c = 0
	for line in changes:lines() do
		-- strip out cruft from diff -u output
		if c > 2 and string.find(line, "+") then
			print(string.sub(line, 2))
		end
		c = c + 1
	end
	os.remove(tmpold)
	os.remove(tmpnew)
	print("----------")
end