Andrew Batz excenter

Notes on automating macOS using Javascript (JXA)

Original goal:

open a web page and automate the process of selecting "export to PDF..." from that page.

Resources that helped significantly:

Story: Writing Scripts with Go

This is a story about how I tried to use Go for scripting. In this story, I’ll discuss the need for a Go script, how we would expect it to behave and the possible implementations; During the discussion I’ll deep dive to scripts, shells, and shebangs. Finally, we’ll discuss solutions that will make Go scripts work.

Why Go is good for scripting?

While python and bash are popular scripting languages, C, C++ and Java are not used for scripts at all, and some languages are somewhere in between.

Overview

This gist is based on the information available at golang/dep, only slightly more terse and annotated with a few notes and links primarily for my own personal benefit. It's public in case this information is helpful to anyone else as well.

I initially advocated Glide for my team and then, more recently, vndr. I've also taken the approach of exerting direct control over what goes into vendor/ in my Dockerfiles, and also work from isolated GOPATH environments on my system per project to ensure that dependencies are explicitly found under vendor/.

At the end of the day, vendoring (and committing vendor/) is about being in control of your dependencies and being able to achieve reproducible builds. While you can achieve this manually, things that are nice to have in a vendoring tool include:

	Assistance from this article: https://www.liquidweb.com/kb/how-to-install-docker-on-centos-8/
	=============================
	Introduction
	=============================
	Red Hat and Docker broke up which means you can't just install Docker in CentOS or RHEL 8 and expect it to work.
	In fact if you follow the docker instructions to install, you will get some of docker installed but when you try to start the service it will bomb.

	So how do we get around this? Trick yum (or dfn) into thinking we're running release 7. Then install Docker and Docker Compose.
	=============================
	Procedure

	FROM node:10.16.3-alpine

	# Golang From: https://github.com/docker-library/golang/blob/master/1.12/alpine3.10/Dockerfile
	RUN apk add --no-cache \
	ca-certificates

	# set up nsswitch.conf for Go's "netgo" implementation
	# - https://github.com/golang/go/blob/go1.9.1/src/net/conf.go#L194-L275
	# - docker run --rm debian:stretch grep '^hosts:' /etc/nsswitch.conf
	RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf

	from py2neo import Graph, Node, Relationship

	graph = Graph(
	host="alpha.graph.domain.co",
	auth=('neo4j', 'thePassword-butBetter')
	)

	url="https://py2neo.org/v4/database.html#py2neo.database.Graph.delete_all"
	a = Node("Type", url=url)
	graph.merge(a, "Website", "url")

	import boto3

	def creation_table_scaling(table_name: str, key_name: str, key_type: str, max_read_capacity: int, max_write_capacity: int):
	"""
	Create table dynamodb and make it scale then wait for it to be created
	Args:
	table_name (str): the name of the table to create
	key_name (str): the name of the key, and main attribute of the table
	key_type (str): the data type for the attribute, S for string, N for number, B for binary
	max_read_capacity(int) : Max nb of read per minute

	FROM ruby:2.4-alpine3.7

	# Install dependencies:
	# - build-base: To ensure certain gems can be compiled
	# - nodejs: Compile assets
	# - postgresql-dev postgresql-client: Communicate with postgres through the postgres gem
	# - libxslt-dev libxml2-dev: Nokogiri native dependencies
	# - imagemagick: for image processing
	RUN apk --update add build-base nodejs tzdata postgresql-dev postgresql-client libxslt-dev libxml2-dev imagemagick

	#!/usr/bin/python

	# Credit to frogor for the objc

	from Foundation import NSBundle
	import json
	import objc
	import os
	import plistlib
	import subprocess

	FFMPEG '-i', file, '-c:v', 'libopenjpeg', "jpeg2000\\" + name + ".jp2"\

	Convert image to jpeg2000
	ffmpeg -i in.png -c:v libopenjpeg out.jp2
	Hex Edit out.jp2
	ffmpeg -i in.jp2 -c:v png out.png

	General Edit
	ffmpeg -i input.avi -c:v mpeg2video -g 999 -q:v 1 output.avi
	edit in avidemux/whatever