59 lines
2.3 KiB
Markdown
59 lines
2.3 KiB
Markdown
# Markdown Integration
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Audience: operators and maintainers who rely on generated HTML outputs from Markdown source files.
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Markdown-to-HTML is an implemented file-format integration used by destination transform policy.
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## Dependency
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Rendering uses `github.com/yuin/goldmark`. The exact version is pinned in `go.mod`.
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## Renderer Behavior
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The transformer constructs `goldmark.New()` with no project-specific extensions, parser options, renderer options, templates, CSS, or metadata injection.
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Supported output modes:
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- `sidecar`: renders each source manifest file ending in `.md` and writes a generated output beside it with the `.md` suffix replaced by `.html`.
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- `index`: renders one Markdown source file to `index.html` at the destination bundle path.
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In `index` mode, `transform.markdown_to_html.input` may name the source manifest path to render. If `input` is omitted, the source manifest must list exactly one `.md` file. The selected input must be a clean relative source path, must be listed in the source manifest, and must end in `.md`.
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Raw HTML embedded in Markdown is not passed through by the current renderer behavior. Tests allow Goldmark's disabled-or-escaped raw HTML output forms and reject literal script tags in generated HTML.
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## HTML Wrapper
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Rendered Markdown body HTML is wrapped in a fixed document shell:
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- `<!doctype html>`
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- `<html lang="en">`
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- UTF-8 `<meta charset>`
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- empty `<title>`
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- `<body>` containing the rendered Markdown body
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The wrapper is deterministic and does not read configuration, templates, CSS, or source manifest metadata.
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## Output Metadata
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Generated outputs record:
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- destination path;
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- source path;
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- transform id `markdown_to_html`;
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- SHA-256 digest of the wrapped HTML bytes;
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- byte size of the wrapped HTML bytes.
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Destination state stores generated outputs with `kind: generated`, `source_path`, `transform`, `sha256`, `size`, and optional `url`.
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## Boundaries
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Markdown rendering does not mutate source bundles, publish files, write `.distributor.json`, select destination actions, or choose transfer policy. Publish planning decides whether generated HTML is selected for a destination and destination state records the generated output metadata.
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## Tests
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Before changing Markdown renderer behavior, inspect and run:
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```sh
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go test ./internal/transform/markdown
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```
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