Caleb Epstein Bklyn

Debug with GDB on macOS 11

The big reason to do this is that LLDB has no ability to "follow-fork-mode child", in other words, a multi-process target that doesn't have a single-process mode (or, a bug that only manifests when in multi-process mode) is going to be difficult or impossible to debug, especially if you have to run the target over and over in order to make the bug manifest. If you have a repeatable bug, no big deal, break on the fork from the parent process and attach to the child in a second lldb instance. Otherwise, read on.

Install GDB

Don't make the mistake of thinking you can just brew install gdb. Currently this is version 10.2 and it's mostly broken, with at least two annoying bugs as of April 29th 2021, but the big one is https://sourceware.org/bugzilla/show_bug.cgi?id=24069

$ xcode-select install  # install the XCode command-line tools

TrueNAS

I will be moving from FreeNAS jails to ubuntu with docker, docker compose, and portainer. FreeNAS support and updates are lacking. There are many advantages to making the switch and with ZFS on linux I think FreeNAS may be a thing of the past. Stay tuned for a new guide of my latest setup. Check out my other gists for progress on the switch. https://gist.github.com/mow4cash/626275e095f7f90898944a85d66b3be6

WARNING READ THIS: This page contains incomplete and possibly incorrect info. The page is constantly being edited and worked on. Many of these should work but some may be broken. Read the code carefully to understand what you are doing, stuff may be need to be changed for your own use. This includes but not limited too JAIL AND ROUTER IPs, YOUR FREENAS MAIN VOLUME,THE MOST RECENT RELEASE OF DOWNLOADED FILES Use at your own risk.There may be helpful info in the comments.

Find me in the FreeNAS forums

alembic is great but lacks an out of the box way to set up running migrations against a specific database (e.g. development, test, production). The following adjustments to its env.py and alembic.ini allow us to target a specific database:

Example:

alembic -x db=development upgrade head

env.py:

	#!/usr/bin/env bash
	if [ $# -eq 2 ]
	then
	BASENAME=$(basename $1)
	RUNNAME=rclone-$BASENAME
	ZFSSNAPSHOTBASE=$(zfs list \| grep "$BASENAME" \| grep -v "$BASENAME/" \| awk '{print $1}')
	PIDFILE=/var/lock/$RUNNAME.pid
	ISOTIME=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
	YEAR=$(date -u +"%Y")
	ZFSSNAPSHOTNAME="rclone"

	from setuptools import setup, find_packages
	import subprocess

	def _get_version_hash():
	"""Talk to git and find out the tag/hash of our latest commit"""
	try:
	p = subprocess.Popen(["git", "describe",
	"--tags", "--dirty", "--always"],
	stdout=subprocess.PIPE)
	except EnvironmentError:

	import pandas as pd

	def compare_two_dfs(input_df_1, input_df_2):
	df_1, df_2 = input_df_1.copy(), input_df_2.copy()
	ne_stacked = (df_1 != df_2).stack()
	changed = ne_stacked[ne_stacked]
	changed.index.names = ['id', 'col']
	difference_locations = np.where(df_1 != df_2)

	changed_from = df_1.values[difference_locations]

	#!/usr/bin/perl -w
	#
	# This script was developed by Robin Barker (Robin.Barker@npl.co.uk),
	# from Larry Wall's original script eg/rename from the perl source.
	#
	# This script is free software; you can redistribute it and/or modify it
	# under the same terms as Perl itself.
	#
	# Larry(?)'s RCS header:
	# RCSfile: rename,v Revision: 4.1 Date: 92/08/07 17:20:30

	#e.g. file:
	# 13893,Mickey,Brady,Sinn Féin,Newry and Armagh


	import csv
	import codecs

	def unicode_csv_reader(unicode_csv_data, dialect=csv.excel, **kwargs):
	# csv.py doesn't do Unicode; encode temporarily as UTF-8:
	csv_reader = csv.reader(utf_8_encoder(unicode_csv_data),

	// How to connect 5 publishers with 5 subscribers
	// over TCP using ZeroMQ's XPUB/XSUB proxy.

	// sub (connect)
	// <-8701->
	// (bind) xpub <---> xsub (bind)
	// <-8700->
	// (connect) pub

	var zmq = require('zmq');

	#!/usr/bin/env python
	# -- coding: utf-8 --
	from __future__ import print_function
	"""
	sqla2hdfstore
	===============

	Input:
	sqlalchemy uri