Steve Coffman StevenACoffman

GPG and GIT and SSH ... OH MY!

Assuming you are on a mac and set up your SSH key as described in detail below:

ssh-keygen -o -a 100 -t ed25519 -f ~/.ssh/id_ed25519 -C [email protected] -N ''

Then you won't be prompted for a passphrase. However, if you did have a passphrase:

ssh-keygen -o -a 100 -t ed25519 -f ~/.ssh/id_ed25519 -C [email protected] -N 'Really do not use this passphrase'

Then you will be prompted to type your passphrase every time you interact with git remote (pull, push, fetch, etc.) This is intolerable.

Create-react-app

Create React apps with no build configuration.

Thanks to create-react-app. It's saves a lot of my time. I remember several months ago I had to setup a lot just for a react app, webpack, babel, test environment and so on... Fortunately, everything becomes easy now. Though you have many choices of start boiler plate, you worth trying this.

React router

If you are build a SPA with react, you probably use react-router.

This script performs the following actions:

Creates a TLS certificate in ACM
Upserts a validation CNAME record in Route 53
Waits for the validation CNAME record to complete/update
Waits for the certificate to validate and issue
Outputs a description of the certificate

This obviously assumes that your domain's DNS is hosted on Route 53. It also uses the AWS credentials and region for the environment it is executed in.

Post Google Sheets form entries to Slack

By using Google Form's script editor, you can call Slack webhooks when form submissions are made. You can use this script to do things like creating a live feedback form for taking questions from an audience or notifying your team when someone signs up for an event.

Setup

First, be sure you're collecting the email address in the form:

REMOVE JAMF RESTRICTIONS ON MAC

REMOVE ONLY RESTRICTIONS

sudo jamf removeMDMProfile removes all restrictions

sudo jamf manage brings back all restrictions and profiles

REMOVE ALL RESTRICTIONS AND DISABLE JAMF BINARIES WHILE KEEPING YOUR ACCESS TO VPN AND OTHER SERVICES

sudo jamf removeMDMProfile removes all restrictions

A Webhook, in simple terms, is a user-defined HTTP callback. It is a mechanism for the system to notify you about an event. In our case, we need to send messages to a particular channel in slack. Slack calls in Incoming Webhook. It is a mechanism to send messages to your Slack Channel from external sources. These external sources could be any application or service that is capable of sending a JSON payload over HTTP into a Slack Channel. Each Channel will be identified by a unique Incoming Webhook URL to which you can post the message from outside. This configuration is done via the Integrations for your channel.

Steps to create a incoming webhook in Slack:

Naviagte to the Incoming Webhook URL. Click the hyper link incoming webhook integration below the heading Incoming Webhooks.
You will be asked to enter your team URL, followed by your slack credentials.
Once you have completed the above step, you will see the wizard kind of webpage to

	ssh-keygen -o -a 100 -t ed25519 -f ~/.ssh/id_ed25519 -C [email protected] -N ''

	# -o : Save the private-key using the new OpenSSH format rather than the PEM format. Actually, this option is implied when you specify the key type as ed25519.
	# -a: It’s the numbers of KDF (Key Derivation Function) rounds. Higher numbers result in slower passphrase verification, increasing the resistance to brute-force password cracking should the private-key be stolen.
	# -t: Specifies the type of key to create, in our case the Ed25519.
	# -f: Specify the filename of the generated key file. If you want it to be discovered automatically by the SSH agent, it must be stored in the default `.ssh` directory within your home directory.
	# -C: An option to specify a comment. It’s purely informational and can be anything. But it’s usually filled with <login>@<hostname> who generated the key.
	# -N: Provides the new passphrase.
	eval "$(ssh-agent -s)"
	ssh-add -K ~/.ssh/id_ed25519

	FROM alpine:3.8 AS builder

	WORKDIR /opt
	ARG JDK_TAR=openjdk-11+28_linux-x64-musl_bin.tar.gz
	ARG JDK_DOWNLOAD_PREFIX=https://download.java.net/java/early_access/alpine/28/binaries

	RUN wget -q "$JDK_DOWNLOAD_PREFIX/$JDK_TAR" && \
	wget -q "$JDK_DOWNLOAD_PREFIX/$JDK_TAR.sha256"

	RUN cat $JDK_TAR.sha256 \| xargs -I{} echo "{} $JDK_TAR" \| sha256sum -c - && \

	// axios development only interceptors
	// https://github.com/mzabriskie/axios#interceptors

	/**
	* Strip baseURL from URL
	*
	* @param config Object
	* @returns String
	*/
	function getUrl(config) {

	ARG FUNCTION_RUNTIME

	FROM mikesir87/aws-cli as code

	ARG FUNCTION_NAME
	ARG AWS_DEFAULT_REGION
	ARG AWS_ACCESS_KEY_ID
	ARG AWS_SECRET_ACCESS_KEY

	RUN wget -O function.zip `aws lambda get-function --function-name $FUNCTION_NAME --query 'Code.Location' --output text`