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#! /usr/bin/env python3

import glob
import os
import subprocess
import sys
from itertools import zip_longest

# From https://stackoverflow.com/questions/434287/what-is-the-most-pythonic-way-to-iterate-over-a-list-in-chunks/434411#434411
def grouper(iterable, n):

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#! /usr/bin/env bash

# Script to install NixOS from the Hetzner Cloud NixOS bootable ISO image.
# Wipes the disk!
# Tested with Hetzner's `NixOS 20.03 (amd64/minimal)` ISO image.
#
# Run like:
#
#     curl https://nh2.me/nixos-install-hetzner-cloud.sh | sudo bash
#

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set -e

set -x

echo "Cat"
wget --no-clobber 'https://homepages.cae.wisc.edu/~ece533/images/cat.png'

identify 'cat.png'

echo "Cat - 100%"

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#!/usr/bin/env bash

# Installs NixOS on a Leaseweb server, wiping the server.
#
# This is for a specific server configuration; adjust where needed.
# Originally written for a Leaseweb HP DL120 G7 server.
#
# Prerequisites:
#   * Update the script to adjust SSH pubkeys, hostname, NixOS version etc.
#

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from colorama import Style, Fore, Back

components = [
  '[q] Quit',
  '[s] Search',
  '[←↓↑→,hjkl] Navigation',
  '[↵] Open bug',
  '[n] New bug',
  '[i] Pull',
  '[o] Push',

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# udevadm info /sys/class/net/eno1
P: /devices/pci0000:00/0000:00:1c.5/0000:03:00.0/net/eno1
E: DEVPATH=/devices/pci0000:00/0000:00:1c.5/0000:03:00.0/net/eno1
E: ID_BUS=pci
E: ID_MODEL_FROM_DATABASE=82574L Gigabit Network Connection (NC112i 1-port Ethernet Server Adapter)
E: ID_MODEL_ID=0x10d3
E: ID_NET_LABEL_ONBOARD=enNIC Port 2
E: ID_NET_NAME_MAC=enxe83935edad4b
E: ID_NET_NAME_ONBOARD=eno1
E: ID_NET_NAME_PATH=enp3s0

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git rebase --onto for switching target branches

Git rebase with --onto implements the idea:

cut and paste from start commit B to end commit E and put it "onto" commit O.

nixpkgs example

If you have a situation where somebody made a somebranch PR against master but it should have been against another branch, like this:

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#!/usr/bin/env python3

# Script to deduplicate linker flags in nix variables.
# Workaround for:
#     https://github.com/NixOS/nixpkgs/issues/41340
#
# This is obviously a hack and it should be fixed in nixpkgs.
#
# Usage (from bash to update env vars in the current shell context):
#     eval <(nix-env-flags-deduper.py)

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Type-checking your whole Pull Request before submission

You want to make a pull request to a Haskell project, which requires that each commit in your PR compiles fine individually.

Here is an easy, automated and fast way to check it:

git rebase --interactive HEAD~~~ --exec "! grep 'error:' <(stack ghci mylibrary:lib --ghci-options='-e 1' 2>&1)"

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How to determine if the nix sandbox is in effect on a system

Do the same as the nix-info script, which nix-builds this file and inspects the exit code.

Short version:

nix-build --no-out-link -E 'import <nixpkgs/pkgs/tools/nix/info/multiuser.nix>' 2> /dev/null