Assorted Shellscripts

This a just a collection of arguably useful shell scripts.

⚠️ These are updated on the basis of "do I need something right now". Use at your own risk.

`addcovers.rb`

Picks up album covers from canonical local locations, and adds them to MP3 and FLAC files.

`aquax`

Like pkgx but driven by aquaproj/aqua.

`canonical_imgname`

Derives a canonical filename for photos using EXIF data or certain filename patterns; the format is YYYY-MM-DD hh.mm.ss, that is for example 2021-09-09 11.25.38.

`canonify_imgnames`

Renames images using EXIF data or certain filename patterns so that they conform to a standard, datetime-based naming scheme.

`charge-reminder.go`

Periodically checks the current battery level and alerts the user if it is low (and not charging).

`imgs2pdf`

Uses LaTeX to create a (portrait A4) PDF from the images passed as parameters. Shrinks images to fit the page.

`mkimgpage.rb`

Takes a Markdown file with special image tags and creates an image gallery from it. Comes with a style and footer you might want to adapt.

`music2thumb.rb`

Copies music files to a thumbdrive/music player, converting down to the best format your player supports and renaming for FAT32 compatibility.

Controls pulseaudio volume via shell. Since pulseaudio has a crappy CLI interface, this is useful if you want to assign media hotkeys their proper function under less flashy window managers such as Fluxbox.

`pdfinvert`

In its basic mode, this script inverts all colors in a PDF, including embedded images. You can also specify a more carefully chosen set of color replacement rules.

Note: Deprecated in favor of pdfinvert.rb as of af81254

`pdfinvert.rb`

In its basic mode, this script inverts all colors in a PDF, including embedded images. You can also specify a more carefully chosen set of color replacement rules and exclude images from the conversion.

`pdfsplitk`

Splits PDFs into constant-sized chunks. Useful if you create bulk letters, numbered exams or similar and need one file per instance, e.g. for stapling printers.

`pullphotos`

Downloads photos from compatible cameras without resorting to mounting them as mass-storage devices. Also rotates them according to information provided by the camera.

`rmd2html`

An elementary one-liner that compiles Rmd files into HTML.

`rmobsraw.rb`

Removes obsolete RAW image files, i.e. such whose companion JPGs have been deleted.

`screen_setup`

Provides a narrow interface to xrandr that allows you to switch easily between single, dual, and mirror screen setups. Tries to avoid some pitfalls like enabled but disconnected displays.

`shelve-media`

Interactively work through a list of photos, videos and other media, and sort them into your folder-based collection.

`showqr`

Renders and displays text as qr-code.

`ssh-print.rb`

A simple script that creates a printable PDF backup of an SSH key. Does currently not include any error handling.

`switchkbl`

Rotates through a set of hard-coded (but easily changed) keyboard layouts. Useful for tying to a shortcut (or direct use) under window managers that do not have convenient support for multiple layouts.

`tlwhich`

Ever wondered which package provided that one LaTeX command you remember? TeX Live Which looks for command, environment, package and document class definitions in your local TeX Live installation.

`tikz2png`

Converts TikZ images specified in their own file to PNG. Check the script for quality settings.

`tikz2svg`

Converts TikZ images specified in their own file to SVG.

`transpose-latex-table.rb`

Transposes a regular LaTeX tabular table.

`watch`

Wraps omxplayer to avoid a couple of usability issues, e.g.

hides shell background during video playback,
supports playlists and
supports (recursive) playback of multiple files and directories.

`xdg-mime-which`

Determines in which file the XDG default application for the given MIME type is set.

reitzig / scripts

readme