ernstki

#!/usr/bin/env bash
##
##  Trim extra pixels from around an image, e.g., a screenshot, and replace
##  with a border of uniform width, of a color sampled from the four image
##  corners, using ImageMagick 6.x (or above?)
##
##  Author:    Kevin Ernst <ernstki -at- mail.uc.edu>
##  Date:      29 August 2024
##  License:   WTFPL or ISC at your option
##  Homepage:  https://gist.github.com/ernstki/74aba058622a9cea43bebc4028aba5cd

ernstki

#!/bin/bash
#
# old version that may not work anymore; see docker-image-test.sh instead
#
# source: http://www.googlinux.com/list-all-tags-of-docker-image/index.html
# maybe API documentation? 
# shellcheck disable=SC2086

REGISTRY=https://registry.hub.docker.com/v2/repositories/library

ernstki

TITLE = A Makefile that makes its own 'make help' target
ME = $(lastword $(MAKEFILE_LIST))
HOMEPAGE = https://gist.github.com/ernstki/982edcfbf93c357bdb09878f7c724389/edit

help:  # prints this help
	@bash -c "$$AUTOGEN_HELP_BASH" < $(ME)

define AUTOGEN_HELP_BASH
    declare -A targets; declare -a torder
    targetre='^([A-Za-z]+):.* *# *(.*)'

ernstki

#!/usr/bin/env bash
##
##  Query a GitLab v4 API endpoint, with pagination
##
##  Author:    Kevin Ernst <ernstki -at- mail.uc.edu>
##  License:   WTFPL
##  Date:      22 May 2024
##  Requires:  jq (https://github.com/jqlang/jq)
##  Homepage:  https://gist.github.com/ernstki/3707675c8a4ddb06d128154947c49e29
##

ernstki

# .bashrc essentials
# copy and paste any parts that you need into your own ~/.bashrc

# you may get a nicer one by default from your *nix distro; uncomment this
# only if you have an ugly default "bash-x.y$" prompt string
#PROMPT="[\u@\h:\w]$ "

# trim the display of '\w' to just the last three path elements
PROMPT_DIRTRIM=3

ernstki

#!/usr/bin/env perl
##
##  Usage:    fc-reject.pl > ~/.config/fontconfig/conf.d/88-reject.conf
##  Author:   Kevin Ernst <ernstki -at- mail.uc.edu>
##  License:  MIT or CC-BY-SA-4.0, at your option
##  Source:   https://gist.github.com/ernstki/2ae279ad89888e4099c9852bf0ba5d11
##
use v5.12;
use warnings;
use autodie;

ernstki

A classy .screenrc with LSF support

Here's a sensible .screenrc that does the following:

• gives you a useful and hip-looking status line
• tries really hard to enable 256 color support for programs that support it, like Vim
• disables the visual bell and splash screen
• remaps window #0 to be Ctrl+A, `, which feels more natural to me

ernstki

#!/bin/sh
pkgutil --packages \
  | if [[ "$1" ]]; then grep -i "$1"; else cat; fi \
  | perl -nE '
        #line 5 "pkgutil-list-files"
        chomp;
        print STDERR "# scanning $_…\n";
        $location = `pkgutil --pkg-info $_`;
        $location =~ s/.*location: (.*?)\n.*/$1/s;
        print STDERR "# location: $1\n";

ernstki

Linker error messages related to libc and libstdc++

We run into the dreaded

/usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.18' not found

error messages a lot around here. This article is an attempt to explain what's going on with that.

ernstki

#!/usr/bin/env bash
##
##  Accept arguments from popular package management tools (except Homebrew)
##  and just do the right thing, based on the platform.
##
##  Created out of frustration at typing `yum` on Macs and `port` on Linux
##  boxes, and `apt` on RHEL/CentOS boxes all too often.
##
##  Author:    Kevin Ernst <ernstki -at- mail.uc.edu>
##  Date:      16 Januar 2024