add progressons, simple progress bar

fixes #54

Makefile

@@ -16,6 +16,9 @@ ql-deps:
 	# moira/light doesn't depend on Osicat.
 	git clone https://github.com/ruricolist/moira/ ~/quicklisp/local-projects/moira
 
+	# 2024-08: simple progress bar, not in Quicklisp.
+	git clone https://github.com/vindarel/progressons ~/quicklisp/local-projects/progressons
+
 # Install some system dependencies.
 debian-deps:
 	apt-get install -y libinotifytools0

ciel.asd

@@ -104,6 +104,9 @@
                ;; security
                :secret-values
 
+               ;; other utilities
+               :progressons  ;; simple progress bar. Not in Quicklisp as of <2024-08-30>.
+
                ;;;
                ;;; Language extensions.
                ;;;

docs/libraries.md

@@ -883,6 +883,25 @@ It is available under the `ftp` package name. Here's a quick snippet:
 
 and that's it!
 
+## Other utilities
+
+We ship [progressons](https://github.com/vindarel/progressons), a simple progress bar.
+
+You can use it inside your editor, including Emacs and Slime, as well as on the terminal.
+
+Example usage:
+
+```lisp
+(loop for elt in (progressons:progressbar (list 1 2 3 4 5))
+   do (do-something-with elt)
+      (sleep 0.1)
+      (progressons:step!))
+```
+
+As you can see, it needs a manual `step!` to make it progress.
+
+> WARN: progressons in its present form adds significant overhead. You shouldn't use it with a large dataset.
+
 
 ## Development