briceburg

git merge-base --is-ancestor master HEAD

from man git merge-base

A common idiom to check "fast-forward-ness" between two commits A and B is (or at least used to be) to compute the merge base between A and B, and check if it is the same as A, in which case, A is an ancestor of B. You will see this idiom used

briceburg

#!/usr/bin/env bash

port="${1:-8888}"
cmd="ls /home"

while true; do echo -e "HTTP/1.1 200 OK\\n\\n $($cmd)\\n" | nc -l -p $port ; done

briceburg

releases

• semantic versioning is used
• a branch is created for every major release, e.g. release-1.x, release-2.x, &c.
• when ready to make a release;
  • update any changelogs and documentation with release information, commit/merge to main. ensure CI passes.
  • if backporting fixes into past releases, follow the backporting procedure from containerd, else merge main into the current release branch. e.g. main -> release-2.x.
  • checkout current release branch and update files/version with the current point release, e.g. change 'main' to 2.1.18-rc1.
    • make a release commit (e.g. with message "RELEASE 2.1.18-rc1").
• tag the release using v as a prefix, e.g. git tag v2.1.18-rc1 && git push --tags

briceburg

# error code is in red, starting with \e[31m and ending with \e[0m escape codes.
# only non-zero exit codes appear.
export PS1='[\u@\h \W]\[\e[31m${?#0}\e[0m\]\$ '

briceburg

FROM alpine

ENV \
  APP_DIR="/app" \
  APP_PORT="80"

# the "app" directory (relative to Dockerfile) containers your Laravel app...
COPY app/ $APP_DIR

RUN apk add --update \

briceburg

// the following assumes AWS nitro (e.g. t3.*, m5.*, &c) instances (which use /dev/nvme0n1 as root disk)
// "safely" switches from MBR to GPT partitioning in Ubuntu < 21.04 or other AMIS. 
// Tested using gdisk 1.0.3 from 18.04 / Bionic.
// after the change, you can use >2TB root disks. either initially, or by resizing a smaller one -- in nitro and non-nitro types

provisioners: [
   {
      "type": "shell",
      "inline": [
        "echo Converting to GPT - AWS nitro type instance",

briceburg

#!/usr/bin/env bash

get/value(){
  echo "error getting value" >&2
  return 66
}

main(){
  local lvar=$(get/value) || echo "local var assignment error"
  var=$(get/value) || echo "global var assignment error"

briceburg

package main

import (
	"fmt"
	"log"
	"strconv"

	"github.com/miekg/dns"
)

briceburg

#!/bin/bash

# backlight brightness controls. use freely
# and adjust sysfs directory if not on toshiba
# $author Brice Burgess @iceburg 

sysfs="/sys/class/backlight/toshiba"
max=`cat ${sysfs}/max_brightness`
level=`cat ${sysfs}/brightness`

briceburg

#!/usr/bin/env bash
main(){
  set -eo pipefail

  # sysctl is a readonly filesystem in containers, so this must be set at run;
  #  [[ "$OSTYPE" =~ darwin|macos* ]] || docker_flags+=("--add-host host.docker.internal:host-gateway")
  #  docker run -it "${docker_flags[@]}" --cap-add=NET_ADMIN  --sysctl net.ipv4.conf.all.route_localnet=1 ...
  sysctl -w net.ipv4.conf.all.route_localnet=1

  docker_host_ip=$(getent ahostsv4 host.docker.internal | head -n1 | awk '{print $1}')