Simon Michael - Inside hledger: an architectural tour and how-to - April 2021 - HaskellerZ

Simon Michael presents an architectural tour of hledger, discussing its codebase, design principles, and how to extend it.

Zurich Haskell meetup: meetup.com/HaskellerZ/events/277626304/ Slides: rawcdn.githack.com/simonmichael/hledger/4013a81af8dd2804c73e…(1) hledger is a suite of CLI, TUI and WUI tools, file formats, and documentation for doing accounting with plain text. It is something that's not yet common: an end-user application written in Haskell, that aims to be easy to install, robust and pleasing to use, on all major platforms, including by non-techies. I have been building and growing hledger and the hledger project for about 15 years. In this talk I will, after a quick intro to plain text accounting and hledger, give a tour of hledger's architecture, codebase, significant evolutions, and some design principles. Then I'll give some practical tips on how to: add your own custom hledger commands; use hledger from your own app; troubleshoot hledger behaviour; investigate bugs; and create effective pull requests. This will hopefully go smoothly, and in the Q&A we can go deeper on whatever you like. Simon: joyful.com hledger: hledger.org Plain Text Accounting: plaintextaccounting.org