Pictures of a Working Garbage Collector
Screencast If you click on this screenshot, you'll see OSH running ./configure from CPython's tarball, with GC debug output. This is: 16K lines of gnarly shell generated by GNU autoconf Running in our shell interpreter, written in ~40K lines of typed Python. But, it's translated to ~80K lines of pure C++! That generated C++ runs on top of a ~4K line runtime of garbage collected data structures, an
Hay - Custom Languages for Unix Systems
Example Hay could be used to configure a hypothetical Linux package manager: # cpython.hay -- A package definition hay define Package/TASK # define a tree of Hay node types Package cpython { # a node with attributes, and children version = '3.9' url = 'https://python.org' TASK build { # a child node, with Oil code ./configure make } } This program evaluates to a JSON tree, which you can consume fr
Oil 0.10.0 - Can Unix Shell Error Handling Be Fixed Once and For All?
Error Handling Overhaul: try and _status So, can shell's error handling be fixed once and for all? I believe Oil 0.10.0 has done this. It's the first shell with reliable error handling in 50 years :-) Basic Idea Recall that Oil is designed to be familiar to Python and JavaScript users. So a program should stop by default on any failure, like: cp: cannot create regular file '/nonexistent': Permissi
Why Create a New Unix Shell? (2021)
Introduction Before explaining why I created Oil, let's review what it is. You can think of a Unix shell in two ways: As a text-based user interface. You communicate with the operating system by typing commands. As a language. It has variables, functions, and loops. Shell programs are text files that start with #!/bin/sh. In this document, we'll think of Unix shells as languages. The Oil project a
An Opinionated Guide to xargs
Preliminaries What Is xargs? It's an adapter between text streams and argv arrays, two essential concepts in shell. You pass it flags that specify how to split stdin. Then it generates arguments and invokes processes. Example: $ echo 'alice bob' | xargs -n 1 -- echo hi hi alice hi bob What's happening here? xargs splits the input stream on whitespace, producing 2 arguments, alice and bob. We passe
Release of Oil 0.8.8
This is the first release in almost two months! I'm writing a blog post that gives color on this (#project-updates), but let's do the usual release announcement first. Most of the work done was under the hood, with major progress on the garbage collector (previously) and build system. I also do a thorough review of project #metrics in the appendix. Closed Issues There were at least two user-visibl
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Oils 0.21.0 - Flags, Integers, Starship Bug, and Speed
Interactive Shell Screencasts
Oils 0.18.0 - Progress on All Fronts
Oils Is Exterior-First (Code, Text, and Structured Data)
How to Create a UTF-16 Surrogate Pair by Hand, with Python
Oil 0.14.2 - Interactive Shell, and Conceding to autoconf
Oil 0.12.7 - Garbage Collector Problems
Oil 0.12.4 - User Feedback
Oil 0.11.0 - Big Features and Project Changes
Oil Is Being Implemented "Middle Out"
http://www.oilshell.org/release/latest/doc/oil-language-tour.html
Release of Oil 0.8.12
Variable Declaration, Mutation, and Scope
Oil Doesn't Require Quoting Everywhere