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zkldi_Tachi/old-docs/docs/codebase/import/orphans.md
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zk e363bd2532 docs: migrate from mkdocs to mdbook (#1558)
* docs: migrate from mkdocs to mdbook

- Rename old mkdocs docs/ to old-docs/ for reference
- Set up new docs/ with mdbook (book.toml + src/ tree)
- Mirror full nav structure from mkdocs.yml into SUMMARY.md
- Add Justfile-docs with docs-serve, docs-build, docs-check, docs-install recipes
- Import Justfile-docs from root Justfile
- Rewrite .github/workflows/docs.yml: build step uses taiki-e/install-action
  to install mdbook, split into separate build + deploy jobs, PR builds
  run the check step too

* ci(docs): pin actions to SHAs, install mdbook via release binary

* ci(docs): install mdbook from apt instead of curling a release binary

* dev: replace mkdocs python stack with mdbook in dev image

* ci(docs): apt only works on Debian; restore release binary install for Ubuntu CI

* docs: fix duplicate file entries in SUMMARY.md

* docs: remove docs-install recipe

* docs: remove site-url from book.toml to fix asset loading

* dev: install mdbook from upstream release binary, not Debian apt

The Debian package (0.4.x+ds) strips bundled font assets, leaving the
built site without fonts/fonts.css. Use the upstream tarball (same as CI)
so the theme is complete. Handles x86_64 and aarch64.

* docs: vendor mdbook tarballs in dev/mdbook/, install from there

Dockerfile.dev uses COPY + tar to install the right arch at build time.
CI extracts the x86_64 tarball directly from the checkout.
No network access required for either — and no stripped-fonts Debian package.

* fix: unwritten
2026-05-22 20:43:07 +01:00

996 B

Orphan Scores

SongOrChartNotFoundFailures state that we don't have the data to understand what chart/song this score is for.

However, that doesn't necessarily imply we won't have that data in the future. Orphaned scores are a way of storing score-like data without a song or chart as a parent.

Then, when the song and chart are made available, those scores can be imported as if nothing had changed!


How do they work?

Orphaned scores store the data and context from the parser.

When unorphaning is attempted, the Converter Function is called with that data and context.

If it results in a SongOrChartNotFoundFailure, we do nothing.

If it results in a success, we have a new DryScore we can import.

!!! info If another type of failure occurs - i.e. InvalidScoreFailure, then we remove the orphaned score from the DB.

!!! note This is why Converter Functions are completely static, so we can safely call the same Converter Function with this data to unorphan scores.