Rick Blommers gamecreature

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Git Subtree Basics

If you hate git submodule, then you may want to give git subtree a try.

Background

When you want to use a subtree, you add the subtree to an existing repository where the subtree is a reference to another repository url and branch/tag. This add command adds all the code and files into the main repository locally; it's not just a reference to a remote repo.

When you stage and commit files for the main repo, it will add all of the remote files in the same operation. The subtree checkout will pull all the files in one pass, so there is no need to try and connect to another repo to get the portion of subtree files, because they were already included in the main repo.

Adding a subtree

Let's say you already have a git repository with at least one commit. You can add another repository into this respository like this:

	#!/usr/bin/env ruby

	#
	# EMAIL extractor from Maildir (mbox files)
	#

	# extracts all emailadresses from a IMAP directory tree
	chars = %w{ \| / - \\ }
	def find_email_addresses(base_folder)

	module PunditExtensionHelper
	# this method is the same as the pundit_scope method
	# the difference is, it doesn't invoke the resolve method
	def policy_scoper(scope_in, method = :resolve)
	scope = scope_in.is_a?(Array) ? scope_in.last : scope_in

	policy_scope_class = Pundit::PolicyFinder.new(scope).scope!
	return unless policy_scope_class

	begin

	# Schema Validations Concern - simple basic replacement for https://github.com/SchemaPlus/schema_validations
	#
	# Warning, uniqueness validators are NOT Added
	#
	# Constraints:
	# - null: false => validates ... presence: true
	# - limit: 100 => validates ... length: { maximum: 100 }
	#
	# Data types:
	# - :boolean => :validates ... inclusion: { in: [true, false] }

	# Use it by including it directly in the unix-ruby script

	def run_script_once
	emails = %w[[email protected]]

	path = "#{$0}.pid"
	if File.exists?(path)
	pid = IO.read(path).to_i
	begin
	if Process.getpgid(pid)

	#
	# What does this do:
	#
	# Normal: (Basic library usage, without this helper)
	# --------------------------------------------------
	# render turbo_stream: [
	# turbo_stream.replace(:flash, partial: 'shared/flash'),
	# turbo_stream.replace(:object, partial: 'partial/name', locals: { object: object } )
	# turbo_stream.replace(:object2, partial: 'partial/name'2, locals: { object2: object2 } )
	# ]

	# Load DSL and set up stages
	require 'capistrano/setup'

	# Include default deployment tasks
	require 'capistrano/deploy'

	require "capistrano/scm/git"
	install_plugin Capistrano::SCM::Git

	# -8<-------8<-------8<-------8<-------8<-------8<------

	#!/bin/sh

	emit() {
	if [ "$arg_commit" = "1" ]; then
	#echo " \| $@"
	echo " \| $@"
	$@ ## << make this the main command or run with `eval $@`
	else
	echo " \| $@"
	(exit 0)