codemod
ohm
codemod | ohm | |
---|---|---|
8 | 10 | |
3,895 | 4,886 | |
- | 0.6% | |
0.0 | 6.5 | |
over 3 years ago | 1 day ago | |
Python | JavaScript | |
Apache License 2.0 | MIT License |
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codemod
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Ohm: A library and language for building parsers, interpreters, compilers, etc.
This is new to me, sounds interesting!
I once used Codemod [0] to migrate an old JS codebase. Would this be a use case for Ohm as well?
[0] https://github.com/facebookarchive/codemod
- Automating Dead Code Cleanup
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Meta pledges Three-Year sponsorship for Python if GIL removal is accepted
That differs but is a reasonable understanding. I’m instead referring to automations that perform large scale refactoring as handled by Facebook, who would be contributing to this effort.
https://github.com/facebookarchive/codemod
It sounds like what you are describing is what’s known as poly fills which convert code into a variant that maximizes function across implementations which isn’t really applicable here.
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Automatic Dependency Upgrade Tool (with auto-resolve breaking changes)
That's why I've been working on a tool that automatically upgrades major versions of libraries with breaking changes, the idea is to simplify the process and save developers time and effort by having a bank of transformers (using codemod & jscodeshift) and open source them:
- Python 2 Removed from Debian
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How Our Engineering Team Used Python's AST to Patch 100,000s of Lines of Code
What they did appears similar to https://github.com/facebook/codemod.
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Software Is Drowning the World
I think codemod is probably one such tool: https://github.com/facebook/codemod
ohm
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Ohm: A library and language for building parsers, interpreters, compilers, etc.
Building an interpreter or a compiler from a grammar is an interesting idea. I can't immediately see how to go about it - the grammar would need to match on SSA or similar.
The examples have a lisp-like interpreter at https://github.com/ohmjs/ohm/blob/main/examples/simple-lisp/... which definitely uses a grammar for parsing and might use a generic AST representation.
Will have to think more - a grammar might be a worthwhile way to specify a nanopass style compiler pipeline.
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Is there a generalised, abstract programming language, designed to be specialised to a specific domain?
Look for OMeta and its successor Ohm.
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[AskJS] Why does our community hate Operator Overloading?
One more suggestion: Maybe create your own scripting-language using Ohm? The project works in JavaScript, so whatever you created would sit on top of your existing APIs.
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A different / new way to write compilers?
OMeta and its successor ohm might provide some interesting ideas.
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Ohm – A library and language for building parsers, interpreters, compilers, etc.
Always fun to find the first commit:
https://github.com/harc/ohm/commit/4611bf63c5ecb90d782112d68...
2014
Neat tool. I write parsers by hand though. More fun, and you can be a lot sleazier.
What are some alternatives?
jscodeshift - A JavaScript codemod toolkit.
PEG.js - PEG.js: Parser generator for JavaScript
comby - A code rewrite tool for structural search and replace that supports ~every language.
peggy - Peggy: Parser generator for JavaScript
scala-steward - :robot: A bot that helps you keep your projects up-to-date
Pegged - A Parsing Expression Grammar (PEG) module, using the D programming language.
semgrep - Lightweight static analysis for many languages. Find bug variants with patterns that look like source code.
usfm-grammar - An elegant USFM parser.
goimports - [mirror] Go Tools
Chevrotain - Parser Building Toolkit for JavaScript
cinder - Cinder is Meta's internal performance-oriented production version of CPython.
meowlang - Meow Programming Language