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Prelude

I. Preface and Motivation

This guide was written because I don't particularly enjoy deploying Phoenix (or Elixir for that matter) applications. It's not easy. Primarily, I don't have a lot of money to spend on a nice, fancy VPS so compiling my Phoenix apps on my VPS often isn't an option. For that, we have Distillery releases. However, that requires me to either have a separate server for staging to use as a build server, or to keep a particular version of Erlang installed on my VPS, neither of which sound like great options to me and they all have the possibilities of version mismatches with ERTS. In addition to all this, theres a whole lot of configuration which needs to be done to setup a Phoenix app for deployment, and it's hard to remember.

For that reason, I wanted to use Docker so that all of my deployments would be automated and reproducable. In addition, Docker would allow me to have reproducable builds for my releases. I could build my releases on any machine that I wanted in a contai

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import UIKit


class ChatCollectionViewFlowLayout: UICollectionViewFlowLayout {
    
    private var topMostVisibleItem    =  Int.max
    private var bottomMostVisibleItem = -Int.max
    
    private var offset: CGFloat = 0.0
    private var visibleAttributes: [UICollectionViewLayoutAttributes]?

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        ## every leader at every church -- OK
        ##
        ##
        ## query = dbsession.query(Leader).join(LeaderChurch).join(Church).filter(LeaderChurch.leader_id == Leader.id and LeaderChurch.church_id == Church.id)


        ## every leader at a particular church -- OK
        ##
        ##
        # query = dbsession.query(Leader). \

mazz

rtl-sdr build notes for OSX 
using macports http://www.macports.org/
see http://sdr.osmocom.org/trac/wiki/rtl-sdr

brew install cmake
brew install libusb
brew install pkgconfig
brew install sox # for easy audio
git clone git://git.osmocom.org/rtl-sdr.git
cd rtl-sdr/

mazz

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

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global
    lua-load /usr/local/etc/haproxy/acme-http01-webroot.lua
    ssl-default-bind-ciphers AES256+EECDH:AES256+EDH:!aNULL;
    tune.ssl.default-dh-param 4096
    debug

defaults
    mode http
    option log-health-checks
    option      dontlognull

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import Foundation
import AVFoundation
import RxSwift
import RxCocoa

extension Reactive where Base: AVURLAsset {
    public var isPlayable: Observable<Bool> {
        return self.observe(Bool.self, #keyPath(AVURLAsset.isPlayable))
            .map { $0 ?? false }
    }

mazz

diff --git a/bin/j2py b/bin/j2py
index 6eb1a40..b618693 100755
--- a/bin/j2py
+++ b/bin/j2py
@@ -6,9 +6,11 @@ This is all very ordinary.  We import the package bits, open and read
 a file, translate it, and write it out.
 
 """
+from __future__ import unicode_literals
 import sys

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maz in websauna-docker at localhost on  master on 🐳 v17.12.0-ce 
➜ docker-compose up   
Starting db    ... done
Starting redis ... done
Starting app   ... done
Attaching to redis, db, app
redis    | 1:C 19 May 05:04:58.343 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
redis    | 1:C 19 May 05:04:58.343 # Redis version=4.0.9, bits=64, commit=00000000, modified=0, pid=1, just started
redis    | 1:C 19 May 05:04:58.343 # Warning: no config file specified, using the default config. In order to specify a config file use redis-server /path/to/redis.conf
redis    | 1:M 19 May 05:04:58.346 * Running mode=standalone, port=6379.

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app      | Error processing line 1 of /usr/local/lib/python3.5/site-packages/websauna-nspkg.pth:
app      | 
app      |   Traceback (most recent call last):
app      |     File "/usr/local/lib/python3.5/site.py", line 167, in addpackage
app      |       exec(line)
app      |     File "<string>", line 1, in <module>
app      |     File "<frozen importlib._bootstrap>", line 574, in module_from_spec
app      |   AttributeError: 'NoneType' object has no attribute 'loader'
app      | 
app      | Remainder of file ignored