mirror of
https://github.com/Abdess/retroarch_system.git
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66 lines
2.6 KiB
Markdown
66 lines
2.6 KiB
Markdown
# Contributing to RetroBIOS
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## Add a BIOS file
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1. Fork this repository
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2. Place the file in `bios/Manufacturer/Console/filename`
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3. Variants (alternate hashes for the same file): `bios/Manufacturer/Console/.variants/`
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4. Open a Pull Request - hashes are verified automatically and reported as a comment
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The [dump provenance](https://abdess.github.io/retrobios/provenance/) page lists catalogued dumps still
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missing from the collection, with their hashes. A file matching one of those is
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the most useful contribution.
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## Add a platform
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1. Write a scraper in `scripts/scraper/` (inherit `BaseScraper`)
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2. Read the platform's upstream source to determine how it checks BIOS files
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3. Register it in `platforms/_registry.yml`
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4. Generate the platform YAML and test: `python scripts/verify.py --platform <name>`
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Full walkthrough: [adding a platform](https://abdess.github.io/retrobios/wiki/adding-a-platform/).
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## Add an emulator profile
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1. Clone the emulator's source code, upstream and libretro port
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2. Trace the file loading from the entry point, not from a keyword grep
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3. Document every file the code loads, with a `source_ref` line reference
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4. Write the YAML to `emulators/<name>.yml`
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5. Test: `python scripts/cross_reference.py --emulator <name>`
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Full walkthrough: [profiling guide](https://abdess.github.io/retrobios/wiki/profiling/).
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## File conventions
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- `bios/Manufacturer/Console/filename` for canonical files
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- `bios/Manufacturer/Console/.variants/filename.sha1prefix` for alternate versions
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- Files >50 MB go in GitHub release assets (`large-files` release)
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- RPG Maker and ScummVM directories are excluded from deduplication
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- Two paths differing only by case break clones on Windows and macOS;
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`tests/test_no_case_collisions.py` enforces this
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## Before opening a PR
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The checks CI runs on a pull request (Python 3.12 or newer):
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```bash
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pip install pyyaml "jsonschema[format-nongpl]"
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python scripts/validate_pr.py --changed # the BIOS files the branch adds
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python scripts/validate_schemas.py --source-only # profiles and platform files
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python -m unittest discover -s tests -t .
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```
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The full pipeline is not needed for a contribution: it rebuilds every pack
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(about 35 GB in `dist/`) and needs the data directories fetched first
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(`python scripts/refresh_data_dirs.py`), which is why maintainers run it
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before a release.
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## PR validation
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CI computes SHA1/MD5/CRC32 for every new file, checks them against the platform
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configs, validates the YAML against the schemas, runs the test suite, and posts
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a report on the PR.
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Contributors who add platform support are credited in the README,
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on the documentation site, and in the BIOS packs.
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