Arturo Fernandez bsnux

Creating Python Standalone Applications with zipapp

zipapp module allows us to create self-contained Python standalone programs that can be distributed to users who have Python already installed on their system.

Python packages not using C extensions can be bundled as well. shiv is recommended for those applications using those kind of extensions. In general, if your dependencies don't require a C compiler, you should be good to go using zipapp module.

Simple aplication listing current directory content

Bash cheatsheet

Google Shell Style Guide

Output

echo "Hello World"
printf "Hello World\n"

	#!/bin/bash
	#
	# Set zsh as default shell when auth is done by LDAP
	#
	set -eou pipefail
	getent passwd afernandez \| perl -pne 's/bash/zsh/' \| sudo tee -a /etc/passwd

	#!/bin/bash
	#------------------------------------------------------------------------
	# run-cmd-pod.sh
	#
	# Runs commands in K8s pods when those are not installed there
	# but they're in the worker node.
	#
	# Motivation: You want to run a command in a pod without
	# installing anything in the pod. If that command exists
	# in the worker node running the pod, then you can use

	#!/bin/bash

	# Print only lines matching expression
	awk -F: '/ssh/ { print } ' /etc/group

	# Print only if field 4 matchs expression
	awk -F: 'match($4,/ssh/) { print } ' /etc/group

	# Print field 1 only if field 4 matchs expression
	awk -F: 'match($4,/ssh/) { print $1 } ' /etc/group

	#!/bin/bash
	#----------
	# simple-cheatsheet.sh
	#
	# source: https://devhints.io/bash
	#
	#----------

	# Variables
	NAME="John"

	#!/bin/bash
	#-------------------------------------------------
	#
	# Create Ansible directory structure
	#
	# Reference: https://docs.ansible.com/ansible/latest/user_guide/playbooks_best_practices.html#content-organization
	#
	#-------------------------------------------------
	role_name=$1

	import java.util.ArrayList


	def MULTIBRANCH_JOBNAME = "project"
	def BRANCH_NAME = "develop"
	def MAX_TO_KEEP = 10

	def hi = hudson.model.Hudson.instance
	def item = hi.getItemByFullName(MULTIBRANCH_JOBNAME)
	def jobs = item.getAllJobs()

	#!/bin/bash
	# help-template.sh
	#
	# Simple template for shell scripts
	#
	Help=$(cat <<-"HELP"
	my-script — does one thing well

	Usage:
	my-script <input> <output>