lua-patterns
strictyaml
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lua-patterns | strictyaml | |
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1 | 21 | |
27 | 1,402 | |
- | - | |
0.0 | 1.9 | |
over 1 year ago | 15 days ago | |
Rust | Python | |
MIT License | MIT License |
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lua-patterns
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The Norway Problem
If you want automatic built-in string validation, one option that seems particularly interesting is to use a variant of Lua patterns, which are weaker and easier to understand than regular expressions, but still provide a significant degree of "sanity" for something like an email. The original version works on bytes and not runes, but you could simply write a parser that works on runes instead, and the pattern-matching code is just 400 old and battle-tested lines of C89.
Lua patterns have also shown up in other places, such as BSD's httpd, and an implementation for Rust:
https://www.gsp.com/cgi-bin/man.cgi?section=7&topic=PATTERNS
strictyaml
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XML is better than YAML
NestedText already is the way I use YAML; everything is intepreted as a string. I have some trust in my YAML parser to not mangle most strings. I could use NestedText, but users would be unfamiliar with it, and IIRC the only parsers are in Python. But then I could use StrictYaml too https://github.com/crdoconnor/strictyaml
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The new type of SQL injection
you can stick to a subset of YAML syntax (e.g. strictYAML)
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DO YOU YAML?
YAML stands for "YAML Ain’t Markup Language" - this is known as a recursive acronym. YAML is often used for writing configuration files. It’s human readable, easy to understand and can be used with other programming languages. Although YAML is commonly used in many disciplines, it has received criticism on the amoutn of whitespace .yml files have, difficulty in editing, and complexity of the standard. Despite the criticism, properly using YAML ensures that you can reproduce the results of a project and makes sure that the virtual environment packages play nicely with system packages. (If you're looking for another way to share environments there are other alternatives to YAML which include StrictYAML (a type-safe YAML parser) and NestedText)
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The yaml document from hell
The example you linked provides this as an example of a YAML document that he wants his format to support.
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The YAML Document from Hell
That safe subset exists and is implemented in a number of languages. It is called strict-yaml: https://hitchdev.com/strictyaml/
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Hacker News top posts: Jul 3, 2022
StrictYAML\ (33 comments)
- StrictYAML
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Why JSON Isn’t a Good Configuration Language (2018)
To me those are in the category of "nice to have", and the problem is that every developer has different preferences for these [1] [2]. But the main features of StrictYaml, like supporting comments and less syntactic noise, I think are pretty uncontroversial, and perhaps it's worth it to get people to switch over for those alone. It doesn't need to be perfect, it just needs to be a significant enough improvement over JSON, and I'd say those two features are more than enough
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YAML: The Missing Battery in Python
For manually-maintained data, I'm inclined to stick within the syntax limits of StrictYAML. It keeps me from getting too fancy.
What are some alternatives?
pyyaml - Canonical source repository for PyYAML
nestedtext - Human readable and writable data interchange format
ytt - YAML templating tool that works on YAML structure instead of text
crudini - A utility for manipulating ini files
yaml-rust - A pure rust YAML implementation.
jsonnet - Jsonnet - The data templating language
starlark-go - Starlark in Go: the Starlark configuration language, implemented in Go
json5 - JSON5 — JSON for Humans
hjson-js - Hjson for JavaScript
node-convict - Featureful configuration management library for Node.js
dhall-lang - Maintainable configuration files
validator - Simple validation for Rust structs