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Some Jenkinsfile examples

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fetch api cheat sheet

get JSON

fetch('/things/10', {
  credentials: 'same-origin',
  headers: {
    'accept': 'application/json'
  }

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Go Cheat Sheet

Install Go on Mac

Following the instructions from https://golang.org/doc/install

1. Download https://golang.org/doc/install?download=go1.13.3.darwin-amd64.pkg
2. Run installer

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Golang — Understanding channel, buffer, blocking, deadlock and happy groutines.

I was so confused to understand behaviior of Golang channels, buffer, blocking, deadlocking and groutines.

I read Go by Example topics.

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Run commands on remote Docker host

This is how to connect to another host with your docker client, without modifying your local Docker installation or when you don't have a local Docker installation.

Enable Docker Remote API

First be sure to enable the Docker Remote API on the remote host.

This can easily be done with a container.
For HTTP connection use jarkt/docker-remote-api.

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This exception appears to affect ansible when a playbook is executed from a host with several identities configured in the SSH agent (Tested on a development machine with 12 private keys).

I've noted this exception to be particulary common with AWS targets

Inventory configuration

Most tasks will run fine when we configure our inventory to use a specific private key.

We also need to set the IdentitiesOnly flag so that ssh does not attempt other authentication strategies.

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{# style 1 - long form #}
{% if filepath == '/var/opt/tomcat_1' %}
  {% set tomcat_value = tomcat_1_value %}
{% else %}
  {% set tomcat_value = tomcat_2_value %}
{% endif %}

{# style 2 - short form #}
{% set tomcat_value = tomcat_1_value if (filepath == '/var/opt/tomcat_1') else tomcat_2_value %}

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package main

import (
	"flag"
	"io"
	"log"
	"net"
	"net/http"
	"strings"
)

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Originall From: Posted 2015-05-29 http://ubwg.net/b/full-list-of-ffmpeg-flags-and-options

This is the complete list that’s outputted by ffmpeg when running ffmpeg -h full.

usage: ffmpeg [options] [[infile options] -i infile]… {[outfile options] outfile}…

Getting help:
    -h — print basic options
    -h long — print more options
    -h full — print all options (including all format and codec specific options, very long)