Aleksandar N. Kostadinov akostadinov

I just hope what I do is useful to somebody. -- nothing I post here or elsewhere is or can be my employer's official statement

akostadinov / xmr-stak.service

Last active May 14, 2021 07:35

Example xmr-stak systemd service unit file.

	[Unit]
	Description=xmr-stak miner
	After=syslog.target network.target

	[Service]
	Type=simple
	# interesting info about starting as regular user: https://bbs.archlinux.org/viewtopic.php?id=162297
	User=username
	LimitMEMLOCK=256M
	EnvironmentFile=-/etc/sysconfig/xmr-stak

akostadinov / timebench.groovy

Last active May 10, 2021 04:26

Benchmark Java Thread-Safe Time Formatter Implementations

	@Grapes([
	@Grab(group='org.gperfutils', module='gbench', version='[0.4,)'),
	@Grab(group='org.apache.commons', module='commons-lang3', version='[3.7,)'),
	@Grab(group='joda-time', module='joda-time', version='[2.9.9,)')
	])

	/**
	* Java 8 DateTimeFormatter
	*/
	import java.util.Date;

akostadinov / pipeline_examples.groovy

Last active April 15, 2020 14:11

Jenkins Pipeline code Examples

	// clone in sub-directory
	checkout([
	$class: 'GitSCM',
	branches: [[name: 'master']],
	doGenerateSubmoduleConfigurations: false,
	extensions: [[
	$class: 'RelativeTargetDirectory',
	relativeTargetDir: 'some/path'
	]],
	submoduleCfg: [],

akostadinov / xml_builder.rb

Created January 26, 2017 10:37

Building XML under Rails 5.

	require 'builder'

	# See more about syntax on
	# http://api.rubyonrails.org/classes/ActionView/Base.html
	# https://github.com/jimweirich/builder
	# http://builder.rubyforge.org/

	xml = +""
	builder = Builder::XmlMarkup.new(target: xml, indent: 2)
	builder.rootelementname { \|x\|

akostadinov / post_string_file.rb

Created January 26, 2017 10:19

ruby rest-client posting String as a file multipart/form-data

	# rest-client recognizes files in multipart/form-data by checking
	# the object type passed as the field content. We need to craft
	# our string to appear as a file IO. `#stringfile` does that.
	# An alternative approach is to just write string to a file and
	# pass file IO to rest-client but this would be suboptimal
	# provided we already have the content as a String.

	def stringfile(string,
	filename="file_#{rand 100000}",
	type=MIME::Types.type_for("xml").first.content_type)

akostadinov / quine.rb

Created January 26, 2017 09:42

my first suboptimal ruby quine

	pr = %q{puts %{pr = %q{#{pr}}}, pr}
	puts %{pr = %q{#{pr}}}, pr

akostadinov / rails_test.rb

Last active November 9, 2016 21:40

Rails Active Record simple test

	# run by `ruby rails_test.rb`
	# credits to https://github.com/rails/rails/issues/13744#issuecomment-32670636
	gem 'activerecord', '5.0.0.1'
	require 'active_record'
	require 'minitest/autorun'
	require 'logger'

	# Ensure backward compatibility with Minitest 4
	Minitest::Test = MiniTest::Unit::TestCase unless defined?(Minitest::Test)

akostadinov / stack_trace.sh

Last active February 20, 2025 05:44

Get stack trace in Bash shell script/program.

	# LICENSE: MIT, wtfpl or whatever OSS license you like
	function get_stack () {
	STACK=""
	local i message="${1:-""}"
	local stack_size=${#FUNCNAME[@]}
	# to avoid noise we start with 1 to skip the get_stack function
	for (( i=1; i<$stack_size; i++ )); do
	local func="${FUNCNAME[$i]}"
	[ x$func = x ] && func=MAIN
	local linen="${BASH_LINENO[$(( i - 1 ))]}"

akostadinov / wsse_xml.rb

Last active June 13, 2016 14:59

generate XML WSSE credentials with the simple `wsse` gem.

	require 'io/console'
	require 'wsse'

	header = WSSE::header('username', STDIN.noecho(&:gets).chomp)

	def wsse_xml(user, password)
	raw = WSSE::header(user, password)
	# username = raw.gsub(/^.* Username="(.)", PasswordDigest=".(?!PasswordDigest)$/, '\\1')
	digest = raw.gsub(/^., PasswordDigest="(.)", Nonce=".*$/, '\\1')
	nonce = raw.gsub(/^., Nonce="(.)", Created=".*$/, '\\1')

akostadinov / add_dup_child_ns_nokogiri_bug.rb

Created June 9, 2016 10:38

	#!/usr/bin/env ruby

	# see https://github.com/sparklemotion/nokogiri/issues/1200

	require 'nokogiri'

	src =<<EOD
	<wrapper xmlns="ns">
	<record xml:id="r1" xmlns:extra="extra">
	<field>aaa</field>