Igor Skrynkovskyy h2rd

How to change your commit messages in Git?

At some point you’ll find yourself in a situation where you need edit a commit message. That commit might already be pushed or not, be the most recent or burried below 10 other commits, but fear not, git has your back 🙂.

Not pushed + most recent commit:

git commit --amend

This will open your $EDITOR and let you change the message. Continue with your usual git push origin master.

How to delete Sidekiq jobs in a Rails app using ActiveJobs

Sidekiq jobs can be enqueued or scheduled. Enqueued means that they are gonna be picked up as soon as possible, scheduled jobs will be enqueued at some specific time.

job_id and jid

When using ActiveJobs, Rails will return a job_id after sending the job to ActiveJobs

job = UserMailer.send_invite(params).deliver_later

Create a branch with the tag

	git branch {tagname}-branch {tagname}
	git checkout {tagname}-branch

Include the fix manually if it's just a change ....

	git add .
	git ci -m "Fix included" # or cherry-pick the commit, whatever is easier
	git cherry-pick {num_commit}



	## Useful Commands

	Get kubectl version

	kubectl version

	Get cluster info:

	#!/bin/bash
	rm /tmp/image-pull-secret.yaml
	login_cmd=$(aws ecr get-login)
	username=$(echo $login_cmd \| cut -d " " -f 4)
	password=$(echo $login_cmd \| cut -d " " -f 6)
	endpoint=$(echo $login_cmd \| cut -d " " -f 9)
	auth=$(echo "$username:$password" \| /usr/bin/base64)

	configjson="{ \"auths\": { \"${endpoint}\": { \"auth\": \"${auth}\" } } }"


	#
	# Slightly tighter CORS config for nginx
	#
	# A modification of https://gist.github.com/1064640/ to include a white-list of URLs
	#
	# Despite the W3C guidance suggesting that a list of origins can be passed as part of
	# Access-Control-Allow-Origin headers, several browsers (well, at least Firefox)
	# don't seem to play nicely with this.
	#

	FROM ubuntu:latest

	ADD start.sh /bin/start.sh
	RUN chmod +x /bin/start.sh

	# Add crontab file in the cron directory
	ADD crontab /etc/cron.d/thecron

	# Give execution rights on the cron job
	RUN chmod 0644 /etc/cron.d/thecron

	#!/bin/bash

	# remove exited containers:
	docker ps --filter status=dead --filter status=exited -aq \| xargs docker rm -v

	# remove unused images:
	docker images --no-trunc \| grep '<none>' \| awk '{ print $3 }' \| xargs docker rmi --force

	# remove unused volumes:
	find '/var/lib/docker/volumes/' -mindepth 1 -maxdepth 1 -type d \| grep -vFf <(