JM1

Ansible Roles with OS-specific Defaults

This Ansible guide discusses several approaches on how to set different role default variables based / depending on the host operating system aka ansible_distribution / ansible_facts.distribution or other variables. For example, a role variable image_uri should point to the latest cloud image for the host. For CentOS 8 or Red Hat Enterprise Linux (RHEL) 8 the default value should be:

moonwatcher

--- src/cxx/lib/io/Xml.cpp	2018-01-05 14:12:25.000000000 -0500
+++ src/cxx/lib/io/Xml.cpp	2018-01-05 14:12:35.000000000 -0500
@@ -168,19 +168,11 @@
     if (!tree.empty())
     {
         unindex(*tree.begin(), treeWithIndexAttributes);
-#ifndef WIN32
-        boost::property_tree::write_xml(os, treeWithIndexAttributes, boost::property_tree::xml_writer_make_settings(' ', 2));
-#else
         boost::property_tree::write_xml(os, treeWithIndexAttributes, boost::property_tree::xml_writer_make_settings<std::string>(' ', 2));

wookietreiber

install git extract

1. clone this repository

   git clone https://gist.github.com/wookietreiber/290e909a39cf7a02c8e89290e6fc4fed git-extract
   

2. make git-extract script available to your shell

mkdir -p ~/bin

wookietreiber

import java.util.{ Random => JRandom }
import java.util.concurrent.atomic.AtomicLong
import scala.util.Random

val rng = new Random

val seedField = classOf[JRandom].getDeclaredField("seed")
seedField.setAccessible(true)

val seed = seedField.get(rng.self).asInstanceOf[AtomicLong].get

wookietreiber

#!/bin/bash

export SPLIT_header_n=$1
target_size=$2
export SPLIT_input_file=$3

target_wo_header=$(( "$target_size" - "$SPLIT_header_n" ))

[[ -n $SPLIT_input_file ]] || {
  echo "usage: $(basename "$0") SPLIT_header_n target_n SPLIT_input_file" >&2

wookietreiber

#!/bin/bash

if git rev-parse --verify HEAD &> /dev/null ; then
  against=HEAD
else
  against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
fi

files=$(
  git diff-index --cached --name-only $against |

wookietreiber

suppressMessages(library(lintr))

files <- commandArgs(trailingOnly = T)

messages <- function(file) {
    result <- lint(file)
    print(result)
    return(length(result))
}

wookietreiber

#!/usr/bin/env bash

set -efu -o pipefail

# returns staged files
function staged.files {
  if git rev-parse --verify HEAD &> /dev/null
  then
    against=HEAD
  else

wookietreiber

#!/bin/bash

GIT_HOOK_DIR="$0.d"

if [[ -d $GIT_HOOK_DIR ]] ; then
  while IFS= read -r -d $'\0' hook ; do
    "./$hook" || error="yes"
  done < <(find "$GIT_HOOK_DIR" -mindepth 1 -print0)

  [[ -n $error ]] && exit 1

wookietreiber

R - Interactive Sessions and Command Line Interface

This is a template for R projects that should work both on the command line as well as in an interactive session.

Template Files

The template is made up of three files:

1. foo.r