Files
guara/CONTRIBUTING.md
T
Lucas RayanandClaude Sonnet 5.5 b93ad02a0e Documentação: inglês como versão principal e português em *.pt-BR.md
README, ROADMAP, CHANGELOG, CONTRIBUTING, SECURITY e docs/ passam a ter
a versão principal em inglês. As versões em português ficam em
*.pt-BR.md e docs/pt-BR/, com seletor de idioma no topo de cada arquivo.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RRZm8uTVN3WLTwcbrDQAUM
2026-10-20 09:48:51 -03:00

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# Contributing to Guará
[English](CONTRIBUTING.md) · [Português](CONTRIBUTING.pt-BR.md)
Thanks for helping! Golden rules:
1. **Never write to the source.** Any code that opens a device must use `source::open_path` (read-only). PRs that write to the source disk are rejected.
2. **Test with real data.** New detectors/readers need a test that recovers a known file bit for bit (see `crates/guara-core/tests/` and `scripts/make-fixtures.sh`).
3. **Be honest about confidence.** If the content cannot be validated, confidence is at most medium.
## Workflow
```bash
cargo fmt --all
cargo clippy --workspace --all-targets
cargo test --workspace
```
On Linux the tests build images with `mtools`, `ntfs-3g`, `e2fsprogs`, `exfatprogs`, `imagemagick`, `zip` and `python3`. Without these tools the image tests are skipped (set `GUARA_REQUIRE_FIXTURES=1` to make them fail).
For the external reference images (BitLocker, FileVault 2, dfvfs, AFF4), run `scripts/fetch-testdata.sh`; without them those tests are skipped. The BitLocker test takes about 75 s.
## Where to make changes
A map of the modules is in [docs/architecture.md](docs/architecture.md). What is missing and what is welcome is in the [ROADMAP](ROADMAP.md).
## Adding a file format
Simple detectors live in `crates/guara-core/src/signatures.rs`; the newer ones in `formats.rs`. Add the detector to `detect`, the first byte to `might_start`, the extension to `category_for_ext`/`matches_ext` and a real file to `scripts/make-fixtures.sh` with a bit-exactness test.
## Adding a file system
Create the reader in `crates/guara-core/src/fs/`, register it in `fs/mod.rs` and bring a test with a real or reference image. **We do not ship a reader without validation**: that is why ReFS and Storage Spaces do not exist yet. Small images without personal data are the best gift you can give the project.
## Documentation
The main version is in English and every file has a Portuguese translation (`*.pt-BR.md`, `docs/pt-BR/`). No em dashes or en dashes. When you change a feature, update both versions (English and Portuguese) of [docs/support.md](docs/support.md), the [CHANGELOG](CHANGELOG.md) and, if applicable, the [ROADMAP](ROADMAP.md).
## Commits
Short messages in the imperative (`fix reading of sparse runs in NTFS`). One logical change per PR.