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Go supports modules since v1.11+.

Go modules require that GOPATH is empty => unset GOTPATH

Define a module

Run go mod init {module name} to create a go.mod file for the current directory.

For example go mod init github.com/brutella/dnssd creates the following content.

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Enable camera module

Edit your /boot/config.txt file and make sure the following lines look like this:

start_x=1             # essential
gpu_mem=128           # at least, or maybe more if you wish
disable_camera_led=1  # optional, if you don't want the led to glow

Load bcm2835-v4l2 module

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#! /bin/sh

function print_example() {
    echo "Example"
    echo "  icons ios ~/AppIcon.pdf ~/Icons/"
}
    
function print_usage() {
    echo "Usage"
    echo "  icons <ios|watch|complication|macos> in-file.pdf (out-dir)"

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Install Rasbian

Most of the time I use a headless Raspberry Pi which I want to access via ssh. These are the steps to do that.

1. Download Rasbian
2. Install the downloaded file on a SD card

• Find the disk number of the SD card with diskutil list
• Unmount the disk with diskutil unmountDisk /dev/disk<number>
• Copy data on the SD card with sudo dd bs=1m if=<img-file> of=/dev/rdisk<number> conv=sync

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runit

Official Documentation: http://smarden.org/runit/ Quickstart: https://kchard.github.io/runit-quickstart/

Install

sudo apt-get install runit

Launch runit on startup by running /usr/sbin/runsvdir-start & in /etc/rc.local. Read more

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Install Go

1. Download the latest stable version from golang.org with wget -c <url> – use armv6 architecture for Rasbperry Pi 3 Model B.
2. Extract with sudo tar -C /usr/local -xvzf <file>
3. Setup the Go workspace

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#!/bin/sh

function print_example() {
    echo "Example"
    echo "  git-diff develop master"
}

function print_usage() {
    echo "Usage"
    echo "  git-diff <branch|tag|commit> <branch|tag|commit>"

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• ^s Incremental search

• ^w Select in scope

• cmd t Open documents

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1. Check if there is an existing ssh key available

$ ls ~/.ssh

If id_rsa (private key) and id_rsa.pub (public key) are available, go to step 3.

2. Generate new keys

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#define jn_defaults_get_object(key) [[NSUserDefaults standardUserDefaults] objectForKey:key]
#define jn_defaults_set_object(key, object) \
[[NSUserDefaults standardUserDefaults] setObject:object forKey:key]; \
[[NSUserDefaults standardUserDefaults] synchronize]; \
jn_defaults_post_notification(key)

#define jn_defaults_get_float(key) [jn_defaults_get_object(key) floatValue]
#define jn_defaults_set_float(key, float) jn_defaults_set_object(key, [NSNumber numberWithFloat:float])

#define jn_defaults_observe(key, block) \