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Rudimentary JavaScript object deep copy

Function to perform a deep copy of an object - rudimentary in that it will only handle the following types:

• Primitives
• Array
• Object

Basically can perform the following, but also copy undefined:

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Python threaded workers using ThreadPoolExecutor()

A pattern for using concurrent.futures.ThreadPoolExecutor() to execute a series of "worker" functions in parallel, processing a queue of assigned "work".

How it works:

• worker_init() creates:
  • Queues for "work" and "results".
  • A threading.Event() to denote "no more work in queue".
  • A futures.ThreadPoolExecutor().

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Cleanup legacy GitHub Actions workflow runs

Python utility to bulk delete GitHub Actions runs for a given workflow, either current or legacy/since removed. The GitHub web UI currently allows removal of individual workflow runs - but this becomes tedious quickly when performed in bulk.

Usage

Create a Personal access token allowing the workflow scope:

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Quick example for using the GitHub Container registry

Human user access

Create a new Personal access token with the following permissions:

delete:packages
read:packages
write:packages

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Dependabot for Golang based repositories

Minimal YAML configuration for enabling Dependabot within a Golang based repository.

Place dependabot.yaml at .github/dependabot.yaml within a target repository and you should be good to go.

Configuration dependabot-grouped.yaml implements package grouping, in this example all packages related to AWS Golang SDK with updates will be rolled up into a single Dependabot pull request.

Reference

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name: Workflow

on:
  push:
    branches:
      - main

jobs:
  first:
    runs-on: ubuntu-latest

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Delete CloudFormation stack - retaining resources

A guide for removing an existing CloudFormation stack - but retaining all managed resources.

First step - we need to get the CloudFormation stack into a state of DELETE_FAILED. This can be achieved by attempting stack delete with an IAM role that only has IAM action rights to cloudformation:DeleteStack and cloudformation:DescribeStackResources.

Create a new temporary IAM role with only the following allowed policy actions - for the rest of this guide that will be IAM role TEMP_CLOUDFORMATION_ROLE:

{

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Remove AWS network interfaces from security group ID

Script has been handy to clean up security groups which have been used with VPC honed AWS Lambda functions and maintain an ENI association.

Why this is a problem:

• Lambda function is created within the given VPC subnet(s) and assigned security group.
• During deployment, AWS on your behalf creates ENIs assigned to the security group and placed into the instructed subnet(s).
• Next, change is made to Lambda involving new security group association. AWS now creates new ENIs - as ENI reuse between Lambdas is only for the same security group/subnet combination.
• Finally, user wishes to clean up legacy security group - but can't as existing ENIs still use security group.

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List AWS Lambda@Edge log groups across regions

AWS Lambda@Edge functions, which run under CloudFront at multiple edge locations require associated Lambda functions to exist within each AWS region.

By design, this means CloudWatch Log groups produced by Lambda@Edge functions will exist across these regions.

This Bash script will query for all log groups associated to Lambda@Edge functions for each enabled region of the current AWS account to hopefully help determine where logs are going to and/or exist.

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Delete S3 versioned objects and delete markers

Quick and dirty Bash script to iterate an S3 bucket and remove all object versions and delete markers.

Probably only usable on buckets with a few hundred version objects maximum, otherwise it might be more efficient and time effective to use a lifecycle rule to age out and remove objects in bulk.

Reference

• https://gist.github.com/weavenet/f40b09847ac17dd99d16