Corentin Kerisit cerisier

Reproducible Builds for macOS

There's a neat writeup I stumbled across recently titled "Reproducible codesigning on Apple Silicon" from Keith Smiley about some gotchas when it comes to compiling a binary in a way that's repeatable and always generates the exact same byte output (which would then checksum to the exact same hash) - even if compiled on a different Mac.

In applying the suggestions I found in the blog post, I found a few other corner cases that I just wanted to get documented more explicitly somewhere.

Tools Matter

Footnote 2 from that blog post is important:

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.
Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

If you enjoyed reading this, I'm intending to do more blogging like this over here: https://cdgd.tech

This is not a complaint about Webpack or v4 in any way. This is just a record of my process trying it out so I could provide feedback to the webpack team

Hmm... I don't see any docs for 4.0 on https://webpack.js.org. I guess I'll just wing it. All I need to do is npm i -D webpack@next, right?

+ [email protected]

	# Apply a tag to HEAD at the beginning of each week.
	# We can use this to create semver-looking tags for releases like
	# 2020.44.123+abc1234
	on:
	schedule:
	# Mondays at 5am UTC / midnight EST
	- cron: '0 5 * * 1'

	jobs:
	tagger:

	#! /bin/bash -e
	#
	# clean up everything in CACHE_DIR last accessed more than DAYS days ago.
	# also removes files with bogus timestamps in the future.
	#
	# -----------------------------------------------------------------------
	# Copyright 2021 Todd Derr ([email protected])
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.

	//Copyright (c) 2018 Michael Eisel. All rights reserved.

	#import "CLRCallRecorder.h"
	#import <dlfcn.h>
	#import <libkern/OSAtomicQueue.h>
	#import <pthread.h>

	typedef struct {
	void *ptr;
	NSInteger number;

	# Go to "Activate Google Cloud Shell" in https://console.cloud.google.com/home.
	echo '[{"origin": ["*"],"responseHeader": ["Content-Type"],"method": ["GET", "HEAD"],"maxAgeSeconds": 3600}]' > cors-config.json

	# If you want to restrict the access one or more specific domains, add their URL to the array:
	echo '[{"origin": ["https://yourdomain.com"],"responseHeader": ["Content-Type"],"method": ["GET", "HEAD"],"maxAgeSeconds": 3600}]' > cors-config.json

	# Set CORS config.
	gsutil cors set cors-config.json gs://YOUR_BUCKET_NAME

	# Verify if everything is OK.

	// Zipping.swift
	// known-good: Swift 4.2
	// Alexis Gallagher

	import Foundation

	public extension URL {

	/// Creates a zip archive of the file or folder represented by this URL and returns a references to the zipped file
	///

	import android.annotation.SuppressLint
	import android.os.Parcelable
	import kotlinx.android.parcel.Parcelize

	@SuppressLint("ParcelCreator") // IntelliJ Issue https://youtrack.jetbrains.com/issue/KT-19300
	@Parcelize
	data class Movie(val title: String) : Parcelable