edrex

How do I...

Visualize my flake input tree (to identify duplication)

nix flake metadata

edrex

edrex

Recipes

kmsgrab capture with ffmpeg

sudo LIBVA_DRIVER_NAME=iHD ffmpeg -crtc_id 69  -framerate 60 -f kmsgrab -i - -vaapi_device /dev/dri/renderD128 -filter:v hwmap,scale_vaapi=w=1920:h=1200:format=nv12 -c:v h264_vaapi -profile:v constrained_baseline -level:v 3.1 -b:v 20000k test.mp4

LIBVA_DRIVER_NAME=iHD ffmpeg -device /dev/dri/card0 -f kmsgrab -i - -vf 'hwmap=derive_device=vaapi,scale_vaapi=w=1920:h=1080:format=nv12' -c:v h264_vaapi -vstats output.mp4

edrex

eric@spacelab ~/Downloads $ sudo curl -L https://github.com/dhiltgen/docker-machine-kvm/releases/download/v0.7.0/docker-machine-driver-kvm -o /usr/local/bin/docker-machine-driver-kvm
eric@spacelab ~/Downloads $ sudo chmod a+x /usr/local/bin/docker-machine-driver-kvm 
eric@spacelab ~/Downloads $ sudo curl -L https://github.com/kubernetes/minikube/releases/download/v0.17.1/minikube-linux-amd64 -o /usr/local/bin/minikube
eric@spacelab ~/Downloads $ sudo chmod a+x /usr/local/bin/minikube 
eric@spacelab ~/Downloads $ groups
eric adm cdrom sudo dip plugdev lpadmin sambashare docker libvirtd
eric@spacelab ~/Downloads $ curl -Lo kubectl https://storage.googleapis.com/kubernetes-release/release/v1.5.3/bin/linux/amd64/kubectl && chmod +x kubectl && sudo mv kubectl /usr/local/bin/
eric@spacelab ~/Downloads $ minikube start --vm-driver=kvm
Starting local Kubernetes cluster...
Starting VM...

edrex

from hashlib import *
sha1("hithere").hexdigest()
# '8c2dfa8f32fb0ee305ae7c0ee34cee1f64808417'

edrex

// RingBuffer reads messages from in and writes them to out.
// Whenever out is full, it will remove the oldest message to make room.
// Adapted from https://blog.pivotal.io/labs/labs/a-concurrent-ring-buffer-for-go.
func RingBuffer(in <-chan Message, size int) <-chan Message {
	out := make(chan Message, size)
	go func() {
		defer close(out)
		for m := range in {
			select {
			case out <- m:

edrex

version: '2'
services:
  godoc:
    image: clever/godoc-docker:b5f1b24
    ports:
    - "8080:8080"
    depends_on:
      - redis_up
    environment:
      REDIS_URL: redis://redis:6379

edrex

import Json.Decode as Json exposing (..)
j = "{\"value\":\"{\\\"foo\\\":\\\"bar\\\"}\"}"
decodeString (object1 (decodeString (at ["foo"] string)) (at ["value"] string)) j
-- Ok (Ok "bar") : Result.Result String (Result.Result String String)

edrex

eric@ark ~/g/s/g/s/s/switch (master)> ./switch master -l 7468
{"context":"starting","function":"New","level":"info","msg":"starting","package":"master","time":"2016-08-16T09:47:20-07:00"}
SetUpListener: serverName (of self); localhost:7468
I'm a master switch called 'none' listening on 7468
2016/08/16 09:47:21 grpc: addrConn.resetTransport failed to create client transport: connection error: desc = "transport: dial tcp [::1]:7468: getsockopt: connection refused"; Reconnecting to {"localhost:7468" <nil>}
2016/08/16 09:47:21 grpc: addrConn.resetTransport failed to create client transport: connection error: desc = "transport: dial tcp [::1]:7468: getsockopt: connection refused"; Reconnecting to {"localhost:7468" <nil>}
2016/08/16 09:47:21 grpc: addrConn.resetTransport failed to create client transport: connection error: desc = "transport: dial tcp [::1]:7468: getsockopt: connection refused"; Reconnecting to {"localhost:7468" <nil>}

edrex

bash-3.2$ echo  '{"value": "health"}' | http --pretty=all --verify=no POST https://localhost:7467/v1/health
HTTP/1.1 400 Bad Request
Content-Length: 74
Content-Type: application/json
Date: Thu, 11 Aug 2016 19:06:05 GMT

{
    "Code": 3,
    "Error": "invalid character 'Â' looking for beginning of value"
}