macros.licenses

%spdx() %{lua:
  local licenses = require 'fedora.licenses'
  local expr = rpm.expand('%*')
  local function convert(spdx)
    if spdx == '' then
        return ''
    end
    local fedoras = licenses.spdx2fedora[spdx]
    if fedoras == nil then
      rpm.expand('%{warn:Unknown SPDX license "' .. spdx .. '", using literally}')
      return spdx
    end
    if #fedoras > 1 then
      rpm.expand('%{warn:Multiple options for SPDX license "' .. spdx .. '", using the first option: "' .. fedoras[1] .. '"}')
    end
    return fedoras[1]
  end
  local idx = 1
  local out = ''
  local current = ''
  while idx <= #expr do
    if expr:sub(idx, idx+4) == ' AND ' then
      out = out .. convert(current) .. ' and '
      current = ''
      idx = idx+4
    elseif expr:sub(idx, idx+3) == ' OR ' then
      out = out .. convert(current) .. ' or '
      current = ''
      idx = idx+3
    elseif expr:sub(idx, idx) == '(' then
      out = out .. convert(current) .. '('
      current = ''
    elseif expr:sub(idx, idx) == ')' then
      out = out .. convert(current) .. ')'
      current = ''
    else
      c = expr:sub(idx, idx)
      current = current .. c
    end
    idx = idx+1
  end
  print(out .. convert(current))
}