donatello

import Data.Int (Int64)

divisors :: Int64 -> [Int64]
divisors k = divisors' 2 k
  where
    divisors' n k | n*n > k = [k]
                  | n*n == k = [n, k]
                  | k `mod` n == 0 = (n:(k `div` n):result)
                  | otherwise = result
      where result = divisors' (n+1) k

donatello

{-# LANGUAGE GADTs #-}

import Text.XML.Light

mkElt :: String -> (Attributes, Body) -> Element
mkElt name (attribs, body) = Element {
  elName = unqual name,
  elAttribs = map (\(k, v) -> Attr (unqual k) v) attribs,
  elContent = [Text (CData CDataRaw body Nothing)],
  elLine = Nothing

donatello

#/srv/salt-state/basepkgs.sls
basepackages:
  pkg.latest:
    - pkgs:
      - apt-transport-https
      - bc
      - debconf-utils
      - emacs-goodies-el
      - emacs23-nox
      - htop

donatello

# salt-call state.show_lowstate 
[INFO    ] The `lspci` binary is not available on the system. GPU grains will not be available.
[WARNING ] Although 'dmidecode' was found in path, the current user cannot execute it. Grains output might not be accurate.
[INFO    ] The `lspci` binary is not available on the system. GPU grains will not be available.
[WARNING ] Although 'dmidecode' was found in path, the current user cannot execute it. Grains output might not be accurate.
[INFO    ] Loading fresh modules for state activity
local:
    ----------
    - __env__:
        base

donatello

import gevent
from gevent.monkey import patch_all
patch_all()

import requests
import json

s = requests.Session()

def make_request(s, d):

donatello

Keybase proof

I hereby claim:

• I am donatello on github.
• I am donatello (https://keybase.io/donatello) on keybase.
• I have a public key whose fingerprint is 8EC7 3E41 447A CC5B 4966 BC07 B24F 1635 C23D 9B5A

To claim this, I am signing this object:

donatello

Docker Cheat Sheet

NOTE: 534 stars, 106 forks. I love you all. Please contribute tips and edits back to this cheat sheet -- email's will.sargent@gmail.com and you can treat gists like git repositories and send git diffs.

• Why
• I just want a dev environment
• Prerequisites
• Installation
• Containers
• Images

donatello

-- Display table and index sizes
SELECT
    table_name,
    pg_size_pretty(table_size) AS table_size,
    pg_size_pretty(indexes_size) AS indexes_size,
    pg_size_pretty(total_size) AS total_size
FROM (
    SELECT
        table_name,
        pg_table_size(table_name) AS table_size,

donatello

#!/bin/bash

GODOWNLOAD=go1.9.1.linux-amd64.tar.gz
GOURL=https://storage.googleapis.com/golang/$GODOWNLOAD

INSTALL_ARG=$1

if [ -z $INSTALL_ARG ]; then
    echo "Please specify an install location on the command line."
    exit 1

donatello

How to develop/test Minio event notifications to Kafka

It is most convenient to use Docker to do this.

A Kafka setup is required (and this requires a Zookeeper setup). A Kafka consumer is needed to check the events sent to Kafka. I used kafkacat.

Kafka Setup in Docker