ernstki

Hello, collaborators!

If you have the ability to do so, please compute SHA1 hashes for any files you intend to share with the Weirauch Lab. These hashes, or "checksums," are critical for verifying that we've received your data 100% intact and unmodified.

You will need to save these checksums into a file, then transmit or store that file alongside the original data. Instructions for macOS and Linux are directly below. For Windows, please follow the instructions in the "Generating checksums on Windows" section.

Generating checksums on Unix

Here is a one-liner that will do the job on a typical Unix/Linux system. macOS is also Unix, but if you are not familiar with the command line, see the section "Extra guidance for Mac users," below. If you use Windows and have Git Bash or Cygwin available, this method should also work for you.

ernstki

#!/bin/bash
# h/t: https://unix.stackexchange.com/a/196783/278323
#
# Unicode characters
# ⇥  (rightwards arrow to bar)
#    https://www.fileformat.info/info/unicode/char/21e5/index.htm
#
# ·  (middle dot)
#    https://www.fileformat.info/info/unicode/char/00b7/index.htm
#

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

"Uncuddle" arguments like -pVALUE, or --param=VALUE

Here's a Bash function that will separate option-value pairs where the option and value are glued together without an intervening space.

You give it:

• a bunch of possible prefixes as arguments, like -p, --param=, and --parameter=
• and as the last argument, the maybe-option-value-pair to be checked ($1 in the while (( $# )) loop below)

and it returns the VALUE part, or the empty string if there was no VALUE part (the option and argument were separate).

ernstki

Bash programmable completion for -nvalue / --name=value options

I was reading [an old debian-administration.org post][debadm] about [Bash programmable completion][pcomp], and I had the same question as this person:

I created a script and I use bash_completion, but I cannot figure out how to allow the completion of "--name=value1 --name=value2" (the "=" sign in the middle stop any other completion, and I tried to play with suffixes/prefixes without any success :s

ernstki

#!/usr/bin/env bash
#
#  Remove line breaks from text on stdin
#
#  Author:  Kevin Ernst
#  Source:  https://gist.github.com/ernstki/69ef6736068135d2597cee35b3f28ffb
#
#  See also: 
#    - https://stackoverflow.com/a/1252191
#    - https://stackoverflow.com/a/2764105

ernstki

#!/usr/bin/env bash
#
#  Enqueue the named file(s) / URL(s) mpv's JSON IPC; starts an instance of mpv
#  if one isn't already found in the process list
#
#  Author:   Kevin Ernst (ernstki -at- mail.uc.edu)
#  Date:     03 July 2019; updated 12 November 2021
#  Source:   https://gist.github.com/ernstki/93bc8653556053e51c41cc1ba0c24255
#
#  Requirements:

ernstki

thumb - a command-line thumbnailer & drop-shadower

Quickly generate drop-shadowed thumbnails from the command line using ImageMagick's [convert][convert], optionally specifying a maximum geometry for either (or both) dimensions.

You can choose whether or not to draw a thin (1-pixel), grey ([#777][grey]) border around the image, or leave it off with the

ernstki

#!/bin/bash
#
#  Replicating Kernighan's spell checker demo (https://youtu.be/XvDZLjaCJuw?t=315)
#  and Lorinda Cherry's talking calculator (https://youtu.be/XvDZLjaCJuw?t=800)
#  from the 1982 Bell Labs UNIX video
#
#  Tested with Python 2.7 on Mac and Linux; your mileage may vary with Python 3.
#    - You will need to 'pip install --user inflect' for the calculator part.
#    - On Linux, you will need to install the 'flite' package for your distro.
#

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