ntamvl

How to create a Ruby gem that adds Rake tasks

Create a gem

One way to do this is to use bundler to scaffold our gem:

bundler gem my_gem

Add rake tasks to our gem

I prefer to put tasks meant to manage the gem itself in lib/tasks, and tasks the gem is meant to provide to gem users in lib/my_gem/tasks.

tomhicks

/*
Copy this into the console of any web page that is interactive and doesn't
do hard reloads. You will hear your DOM changes as different pitches of
audio.

I have found this interesting for debugging, but also fun to hear web pages
render like UIs do in movies.
*/

const audioCtx = new (window.AudioContext || window.webkitAudioContext)()

marcoarment

<?php
function base64url_encode($binary_data) { return strtr(rtrim(base64_encode($binary_data), '='), '+/', '-_'); }

function apns_jwt_token($team_id, $key_id, $private_key_pem_str)
{
    if (! function_exists('openssl_get_md_methods') || ! in_array('sha256', openssl_get_md_methods())) throw new Exception('Requires openssl with sha256 support');

    $private_key = openssl_pkey_get_private($private_key_pem_str);
    if (! $private_key) throw new Exception('Cannot decode private key');

pcreux

Failsafe

When something goes wrong I want to degrade the user experience (instead of returning a 500 - Server Error) And I want to be notified about the failure

Usage

Wrap non mission critical code:

rahulramfort

#!/usr/bin/env ruby

=begin

A hook to make sure that all staged .rb files are syntatically correct.
The hook tries to run `ruby -c file_path` for all those files and
prints outs the errors if any and halts the commit.

If you want to use this pre-commit, simply copy the code and create a
file called 'pre-commit' inside your .git/hooks directory.

vitobotta

// This code is to be used with https://turbo.hotwire.dev. By default Turbo keeps visited pages in its cache 
// so that when you visit one of those pages again, Turbo will fetch the copy from cache first and present that to the user, then 
// it will fetch the updated page from the server and replace the preview. This makes for a much more responsive navigation 
// between pages. We can improve this further with the code in this file. It enables automatic prefetching of a page when you
// hover with the mouse on a link or touch it on a mobile device. There is a delay between the mouseover event and the click
// event, so with this trick the page is already being fetched before the click happens, speeding up also the first 
// view of a page not yet in cache. When the page has been prefetched it is then added to Turbo's cache so it's available for
// the next visit during the same session. Turbo's default behavior plus this trick make for much more responsive UIs (non SPA).

tbuehlmann

class Comment < ActiveRecord::Base
  belongs_to :post, counter_cache: true
end

dalezak

def current_ability
  @current_ability ||= begin
    current_ability = Ability.new(current_user)
    controller_names.to_a.each do |controller_name|
      model_name = controller_name.classify
      model_ability = "#{model_name}Ability".constantize rescue nil
      if model_ability.present? && model_abilities[model_ability].nil?
        model_abilities[model_ability] = model_ability.new(current_user)
        current_ability.merge(model_abilities[model_ability])
      end

andynu

# I have lots of projects. As I do the rails upgrades I collect the pin changes and other adjustments here
# towards the end of upgrading all the projects it gets easier and easier because of these commands.

❯ ./rails-upgrade 
Commands:
  rails-upgrade apple_touch                 # add blank apple-touch icons
  rails-upgrade application_record          # adds ApplicationRecord and replaces all references to ActiveRecord::Base with it
  rails-upgrade asset_precompile_check      # look for assets that need to be added to the assets initializer precompile list
  rails-upgrade assigns_check               # the assigns method has been extracted to a gem, check if it is used, and add the gem
  rails-upgrade before_filter               # change before_filter to before_action in controllers

natematykiewicz

desc 'Find routes that will raise a routing error when requested'
task unroutable_routes: :environment do
  # A lot of this code was taken from how `rake routes` works
  # https://github.com/rails/rails/blob/f95c0b7e96eb36bc3efc0c5beffbb9e84ea664e4/railties/lib/rails/commands/routes/routes_command.rb

  require 'action_dispatch/routing/inspector'

  unroutables = Rails.application.routes.routes.
     map { |r| ActionDispatch::Routing::RouteWrapper.new(r) }.
     reject { |r| r.internal? || r.engine? || r.path.starts_with?('/rails/') || !r.controller }.