masgari

class Sniffer:
    def __init__(self, interface, debug=False):
        self._the_interface = interface
        self._debug = debug
        self._socknum = self._the_interface.get_socket()
        assert self._socknum == 0, "MACRAW socket must be socket 0"

    def _read_s0cr(self):
        while True:
            s0_cr = self._the_interface._read_sncr(self._socknum)

masgari

blueprint:
  name: Battery level detection & notification for LiFePO4 battery sensors
  description: Regularly test all sensors with 'battery' device-class for crossing
    a certain battery level threshold and if so execute an action.
  domain: automation
  input:
    threshold:
      name: Battery warning level threshold
      description: Battery sensors below threshold are assumed to be low-battery (as
        well as binary battery sensors with value 'on').

masgari

typealias Price = Double

// experimental inline class, wrapper around primitive without runtime overhead
inline class Percent(private val percent: Int) {
    fun toPercent(): Double = percent / 100.0
}

data class TotalCost(val sum: Price, val discount: Price, val appliedOffers: List<String>)

interface BasketCalculator {

masgari

func handleMyRsource(ctx context.Context, event cfn.Event) (physicalResourceID string, data map[string]interface{}, err error) {
 switch event.RequestType {
 case "Create":
    // return myApiClient.create(event.event.ResourceProperties)
 case "Update":
    // return myApiClient.update(event.event.ResourceProperties, event.OldResourceProperties)
 case "Delete":
    // return myApiClient.delete(event.event.ResourceProperties) 
 }
 

masgari

package main
import (
 "context"
 "fmt"
 
 "github.com/aws/aws-lambda-go/cfn"
 "github.com/aws/aws-lambda-go/lambda"
)
func handleCustomResources(ctx context.Context, event cfn.Event) (physicalID string, data map[string]interface{}, err error) {
 switch event.ResourceType {

masgari

  DevApiKeyValue:
    Type: Custom::ApiKeyValue
    Properties:
      ServiceToken: ${cf:custom-resources-dev.ServiceToken}
      ApiKeyId: !Ref DevApiKey
      SsmParamPath: /api/keys/${self:provider.stage}
      Overwrite: true # default is true

masgari

#!/usr/bin/env python3.6
import subprocess
import sys
import os
import glob

def fix_video_using_ffmpeg(f, output_dir):
    out_f = os.path.join(output_dir, os.path.basename(f))
    # ffmpeg -err_detect ignore_err -i video.mkv -c copy video_fixed.mkv
    exit_code = subprocess.call(['ffmpeg', '-err_detect', 'ignore_err', '-i', f, '-c', 'copy', out_f])

masgari

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

masgari

Install HomeBrew first

brew update
brew tap caskroom/cask
brew install brew-cask

If you get the error "already installed", follow the instructions to unlink it, then install again:

masgari

#!/usr/bin/env ruby
# A quick and dirty implementation of an HTTP proxy server in Ruby
# because I did not want to install anything.
# 
# Copyright (C) 2009-2014 Torsten Becker <torsten.becker@gmail.com>
# 
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,