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// Core assets
let coreAssets = [];

// On install, cache core assets
self.addEventListener('install', function (event) {

	// Cache core assets
	event.waitUntil(caches.open('app').then(function (cache) {
		for (let asset of coreAssets) {
			cache.add(new Request(asset));

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// This works on all devices/browsers, and uses IndexedDBShim as a final fallback 
var indexedDB = window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB || window.shimIndexedDB;

// Open (or create) the database
var open = indexedDB.open("MyDatabase", 1);

// Create the schema
open.onupgradeneeded = function() {
    var db = open.result;
    var store = db.createObjectStore("MyObjectStore", {keyPath: "id"});

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node-sass

Sass é uma linguagem de script que é interpretada ou compilada em Cascading Style Sheets (CSS). e neste GIST estarei demonstrando como usar sass com node js.

Primeiro passo

Iniciar um projecto do zero com a framework express

mkdir node_sass

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#!/bin/bash

#qemu-img create -f qcow2 disk.qcow2 20G
#qemu-img create -f qcow2 varstore.img 128M
debian_iso=debian-9.6.0-arm64-xfce-CD-1.iso
qemu-system-aarch64 -smp cpus=6 -M virt -cpu max -m 2G -nographic \
    -drive file=QEMU_EFI.img,if=pflash,format=raw \
    -drive file=varstore.img,if=pflash \
    -drive file=disk.qcow2,if=virtio \
    -drive file=$debian_iso,if=virtio,format=raw

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    ffmpeg -i jellyfish-120-mbps-4k-uhd-h264.mkv -c:v libx264 -profile:v main -vf scale=1920:1080 -b:v 50000k -an -tune fastdecode -coder 0 -flags -loop -g 30 -bf 0 -t 10 jellyfish-hd-50mbps_main_nosound_fast_short.mp4

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#!/bin/bash -x
# make_arm64_rpi_kernel_debs.sh
# Builds arm64 debian packages from the CURRENT rpi firmware repository kernel which is installed by:
# sudo rpi-update
# This runs on an arm64 host with arm64 compilation tools... 
# or with some sort of cross-compilation setup.
# Debs are put in $workdir/build
#
# This will NOT work in Raspbian unless you have an arm64 compilation
# environment setup. Appears to work on

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#!/bin/bash

# Note that there's no libdrm because this lib cause errors

sudo apt update -y && sudo apt upgrade -y

sudo apt-get -y install \
    autoconf \
    automake \
    libgstreamer1.0-dev \

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How to optimize / defrag ext4 filesystem

Make sure the target filesystem is sane

Open up the terminal and run:

sudo fsck.ext4 -y -f -v /dev/<disk/partition>

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# Kernel
kernel=zImage
#initramfs ramdisk.img 0x01f00000

# Audio
dtparam=audio=on

# Camera
#disable_camera_led=1
#gpu_mem=128

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#!/bin/bash
# Compile and install/update (or install via Apt) FFmpeg Codecs
# Compile and install/update FFmpeg suite
# Compile with hardware acceleration
# Modified from https://retroresolution.com/compiling-ffmpeg-from-source-code-all-in-one-script/

echo "Begining Installation of FFmpeg Suite"

#Update APT Repository
echo "Updating the APT repository information"