tvl-depot/emacs/.emacs.d/wpc/scrot.el
William Carroll 52d284f59d Remove assertions that prelude/executable-exists?
I'm in the midst of transitioning onto a few new tools.

My previous workflow just used `nix-env` to install *some* packages. I didn't
have a prescribed methodology for which packages I would install using `nix-env`
and which ones I would install using `sudo apt-get install`. Sometimes if a
package would be available in my aptitude repositories, I'd use that; other
times when it wasn't available I'd use `nix-env`. One complication about being
on gLinux intead of NixOS is that some packages (e.g. nixpkgs.terminator) is
available via `nix-env -iA nixpkgs.terminator`, but the installation won't
actually run on my gLinux. In these instances, I would install terminator from
the aptitude repositories.

Then @tazjin introduced me to his Emacs configuration that he builds using
Nix. What appealed to me about his built Emacs is that it worked as expected on
either a NixOS machine and on gLinux (and presumably on other non-NixOS machines
as well).

A setup towards which I'm working is to own one or a few NixOS machines whose
configurations are entirely managed with Nix. On devices like my work machines,
which cannot run NixOS, I can build as much of the software that I need using
Nix and attempt to minimize the ad hoc configuration either with shell scripts,
python, golang, or more Nix code... it's clear that I still don't have a clear
idea of how that part will work.

For now, I'm adopting nix, nix-env, lorri, direnv, and weening off of aptitude
as much as I can. Things are a bit messy, but my general trend feels
positive. Stay tuned for more updates.
2020-02-07 11:01:24 +00:00

61 lines
2 KiB
EmacsLisp

;; Author: William Carroll <wpcarro@gmail.com>
;;; Commentary:
;; scrot is a Linux utility for taking screenshots.
;;; Code:
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;; Dependencies
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(require 'f)
(require 'string)
(require 'ts)
(require 'clipboard)
(require 'kbd)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Library
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defconst scrot/screenshot-directory "~/Downloads"
"The default directory for screenshot outputs.")
(defconst scrot/path-to-executable "/usr/bin/scrot"
"Path to the scrot executable.")
(defconst scrot/output-format "screenshot_%H:%M:%S_%Y-%m-%d.png"
"The format string for the output screenshot file.
See scrot's man page for more information.")
(defun scrot/copy-image (path)
"Use xclip to copy the image at PATH to the clipboard.
This currently only works for PNG files because that's what I'm outputting"
(call-process "xclip" nil nil nil
"-selection" "clipboard" "-t" "image/png" path)
(message (string/format "[scrot.el] Image copied to clipboard!")))
(defmacro scrot/call (&rest args)
"Call scrot with ARGS."
`(call-process ,scrot/path-to-executable nil nil nil ,@args))
(defun scrot/fullscreen ()
"Screenshot the entire screen."
(interactive)
(let ((screenshot-path (f-join scrot/screenshot-directory
(ts-format scrot/output-format (ts-now)))))
(scrot/call screenshot-path)
(scrot/copy-image screenshot-path)))
(defun scrot/select ()
"Click-and-drag to screenshot a region.
The output path is copied to the user's clipboard."
(interactive)
(let ((screenshot-path (f-join scrot/screenshot-directory
(ts-format scrot/output-format (ts-now)))))
(scrot/call "--select" screenshot-path)
(scrot/copy-image screenshot-path)))
(provide 'scrot)
;;; scrot.el ends here