hjhart

#!/bin/bash

shut_down_slack() {
  RELAUNCH_SLACK=0
  local process_pattern='[S]lack.app'
  local process_identifier='Slack'
  
  ps -e | grep "$process_pattern" > /dev/null

  if [ $? -eq 0 ]; then

hjhart

# app/models/user.rb
# username              :string, null: false
# email                 :string, null: false
# password              :string, null: false
# admin                 :boolean, null: false, default: false 

class User < ApplicationRecord
  # Fields
  validates :admin, inclusion: { in: [true, false] }
end

hjhart

source 'https://rubygems.org'

gem 'fluentd'
gem 'fluent-plugin-td'
gem 'fluent-plugin-elasticsearch'

hjhart

Effective Caching for Yarn, Bundler, and Rails Asset Pipeline in CircleCI

Phil Karlton said: "There are two hard problems in computer science: cache invalidation, naming things, and off-by-1 errors."

Well, maybe he didn't say exact that, but it's a decent joke anyway.

In this article I'll talk about the first of those problems, caching. And in doing so effectively, how we reduced our CircleCI build times by 33%. For those of you raising your eyebrows and saying "33% off of what?!", I'll direct your eyeballs to the graph below for some absolute numbers.

[ TODO: Show a bar graph of each job going down by a percentage ]

hjhart

update_homebrew_formula:
  description: Pulls in new homebrew formula and caches them
  steps:
    - run:
        name: Set up Cache Key
        command: date '+%Y %m %d' > ~/voom/dependency_checksum

    - restore_cache:
        keys:
          - v3-homebrew-{{ .Branch }}-{{ checksum "~/voom/dependency_checksum" }}

hjhart

precompile_assets:
  description: Precompile Rails Assets
  steps:
    - run:
        name: Set up Cache Key
        command: find ~/voom/app/javascript ~/voom/app/assets -type f -exec md5 -q {} \; > ~/voom/dependency_checksum

    - restore_cache:
        keys:
          - v3-assets-{{ arch }}-{{ .Branch }}-{{ checksum "~/voom/dependency_checksum" }}

hjhart

bundle_install:
  description: Bundle Install
  steps:
    - run:
        name: Expire cache key every month
        command: date '+%Y %m' > ~/voom/dependency_checksum

    - restore_cache:
        keys:
          - v1-bundle-{{ arch }}-{{ checksum "~/voom/dependency_checksum" }}-{{ checksum "~/voom/Gemfile.lock" }}

hjhart

bundle_install:
  description: Bundle Install
  steps:
    - restore_cache:
        keys:
          - bundle-{{ arch }}-{{ checksum "~/voom/Gemfile.lock" }}
          - bundle-{{ arch }}-

    - run:
        name: Install Bundler

hjhart

yarn_install:
  description: Yarn Install
  steps:
    - restore_cache:
        keys:
          - v1-yarn-{{ arch }}-{{ checksum "~/voom/yarn.lock" }}
          - v1-yarn-{{ arch }}-

    - run:
        name: "Yarn Install (Note: Bump cache prefix if this step takes over 30 seconds.)"

hjhart

select substr(query, 0, 250), calls, 
    to_char(total_time/(60*60), '999,999,9999,999') as "Cumulative Time (hrs)", rows, 
    to_char(total_time/calls, '999.999') as per_call_ms 
  from pg_stat_statements 
  order by total_time desc 
  limit 12;