Faheetah

# Note: can also just install nerdctl-full

sudo apt-get update
sudo apt-get install containerd

wget https://github.com/containerd/nerdctl/releases/download/v1.5.0/nerdctl-1.5.0-linux-amd64.tar.gz
tar -zxf nerdctl-1.5.0-linux-amd64.tar.gz nerdctl
sudo mv nerdctl /usr/bin/nerdctl
rm nerdctl-1.5.0-linux-amd64.tar.gz

Faheetah

node {
    echo 'Results included as an inline comment exactly how they are returned as of Jenkins 2.121, with $BUILD_NUMBER = 1'
    echo 'No quotes, pipeline command in single quotes'
    sh 'echo $BUILD_NUMBER' // 1
    echo 'Double quotes are silently dropped'
    sh 'echo "$BUILD_NUMBER"' // 1
    echo 'Even escaped with a single backslash they are dropped'
    sh 'echo \"$BUILD_NUMBER\"' // 1
    echo 'Using two backslashes, the quotes are preserved'
    sh 'echo \\"$BUILD_NUMBER\\"' // "1"

Faheetah

### Generic Dockerfile demonstrating good practices


### Imports

# Bad-ish, we do not need Ubuntu for this, nor do we want latest if we are using in a build system, predictable is better
FROM ubuntu:latest

# Better, using a small image since our app has no dependency on Ubuntu
FROM alpine:3.3

Faheetah

#!/bin/bash

# Source arguments from Ansible
# These are passed into the module as $1 with a key=value format
# Sourcing this file sets the variables defined in the Ansible module
# Note that variables that are unused in the module are silently ignored
source $1

# Helper function to fail the module with the specified error
# This can accept $@ in printf for the full error

Faheetah

Make all the changes described in these files. Delete assets/css/phoenix.css as it is no longer used.

• config/dev.exs
• assets/package.json
• assets/postcss.config.js
• assets/tailwind.config.js
• assets/css/app.css
• mix.exs

Faheetah

A problem with repositories is sometimes you do not remember what commands you ran to bootstrap the application, or what generators were used. A history file similar to .bash_history would be handy for a per-project basis. The h command above provides a wrapper around this functionality. It should be portable across any system with bash.

Run a command and write out the command to the git project's .history file, this logs $@ to .history

$ h mix phx.new project_name
$ h mix deps.get
$ h mix ecto.create
$ cat .history
mix phx.new project_name

Faheetah

# set a loop for running commands, will run unit tests on enter
while read; do go test ./...; done

# set a loop that runs once a second (like watch), can be used in cases watch doesn't fit as well
while sleep 1; do ls; done

# do something with the previous command
pwd
ls $(!!) # equivalent to ls $(pwd)

Faheetah

nothing:
  literally_nothing:

Faheetah

This is handy for cases such as needing to dynamically assign structs, for example when use with marshalling or when assigning the results of a SQL query into a struct, without duplicating code for each type. This is a naive implementation as it takes absolutely no error checking into account. It is not production safe and is meant to demonstrate how to iterate through and populate a struct.

Example usage

type Foo struct {
	Int        int
	String     string
	Unassigned string
}

Faheetah

defmodule StructParser do
  import NimbleParsec

  @space 0x0020
  @tab 0x009

  whitespace = utf8_char([@space, @tab, ?\n])

  ignore_whitespace =
    lookahead(whitespace)