Redis Lua helpers

redis-helpers.lua

local function key_patterns()
    local uniq = {}
    for _, key in ipairs(redis.call('keys', '*')) do
        local pattern = string.match(key, "(.-):")
        if pattern ~= nil and pattern ~= "" then
            if uniq[pattern] == nil then
                table.insert(uniq, pattern)
                uniq[pattern]=1
            else
                uniq[pattern]=uniq[pattern]+1
            end
        end
    end
    return uniq
end

if ARGV[1] == nil or ARGV[1] == "" then
    return key_patterns()
end