reborg

Rich Already Answered That!

A list of commonly asked questions, design decisions, reasons why Clojure is the way it is as they were answered directly by Rich (even when from many years ago, those answers are pretty much valid today!). Feel free to point friends and colleagues here next time they ask (again). Answers are pasted verbatim (I've made small adjustments for readibility, but never changed a sentence) from mailing lists, articles, chats.

How to use:

• The link in the table of content jumps at the copy of the answer on this page.
• The link on the answer itself points back at the original post.

Table of Content

yokawasa

ghcr (GitHub Container Registry) quickstart

CLI

To push container images to ghcr, you need peronal access token (PAT) - see how to create PAT

1. Get PAT (personal access token)

Personal Settings > Developer settings > Personal access tokens

marktheunissen

This playbook has been removed as it is now very outdated.

john2x

Clojure Destructuring Tutorial and Cheat Sheet

(Related blog post)

Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.

Vectors and Sequences

rgreenjr

-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

hrldcpr

One-line Tree in Python

Using Python's built-in defaultdict we can easily define a tree data structure:

def tree(): return defaultdict(tree)

That's it!

cyberdelia

from fabric.api import env, run, sudo, local, put

def production():
    """Defines production environment"""
    env.user = "deploy"
    env.hosts = ['example.com',]
    env.base_dir = "/var/www"
    env.app_name = "app"
    env.domain_name = "app.example.com"
    env.domain_path = "%(base_dir)s/%(domain_name)s" % { 'base_dir':env.base_dir, 'domain_name':env.domain_name }

onyxfish

from fabric.api import *

"""
Base configuration
"""
env.project_name = '$(project)'
env.database_password = '$(db_password)'
env.site_media_prefix = "site_media"
env.admin_media_prefix = "admin_media"
env.newsapps_media_prefix = "na_media"

jlis

image: docker:latest

variables:
  REPOSITORY_URL: <AWS ACCOUNT ID>.dkr.ecr.eu-central-1.amazonaws.com/<ECS REPOSITORY NAME>
  REGION: eu-central-1
  TASK_DEFINTION_NAME: <TASK DEFINITION NAME>
  CLUSTER_NAME: <CLUSTER NAME>
  SERVICE_NAME: <SERVICE NAME>

services:

m8r1x

image: docker:latest

before_script:
  - apt-get update -y  # Updating the Ubuntu Docker instance.
  - python -V  # Print out python version for debugging.
  - apt install -y zip jq
  - pip install awscli --upgrade --user
  - export PATH=~/.local/bin:$PATH # Required for awscli.
  - aws --version  # Print out aws cli version for debugging.