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fix(#345): normalize CRLF before front-matter strip (review round 3)

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F9 [WARNING] The line-anchored front-matter regex from round 2 requires a bare
LF after the opening `---`, so a Windows/CRLF foreign file (`---\r\n...`) slips
past the strip and leaks its front-matter into the body (where `title: Foo`
renders as a setext heading that title extraction hijacks). The canonical parser
whose regex shape this copied (page-file.ts) normalizes CRLF -> LF BEFORE its
FRONTMATTER_RE; the import path copied the regex but missed the normalization.
normalizeForeignMarkdown now replaces CRLF with LF first (which also makes
convertReferenceFootnotes' split('\n') consistent). Adds a CRLF fixture.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
agent_coder
2026-07-05 05:38:07 +03:00
parent 80fc30633b
commit c5bff2d84a
2 changed files with 23 additions and 5 deletions
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apps/server/src/integrations/import/utils/foreign-markdown.ts
+11 -5
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@@ -247,13 +247,19 @@ const YAML_FRONT_MATTER_RE = /^\uFEFF?---\n[\s\S]*?\n---\n?/;
/**
* Normalize a foreign markdown string into Docmost's canonical markdown surface
* so the strict canonical parser accepts it losslessly: strip a leading YAML
* front-matter block, then rewrite GFM reference footnotes into inline
* footnotes. Add further fixture-driven foreign-surface cases here as they are
* found.
* so the strict canonical parser accepts it losslessly: normalize line endings,
* strip a leading YAML front-matter block, then rewrite GFM reference footnotes
* into inline footnotes. Add further fixture-driven foreign-surface cases here as
* they are found.
*/
export function normalizeForeignMarkdown(markdown: string): string {
if (!markdown) return markdown;
const withoutFrontMatter = markdown.replace(YAML_FRONT_MATTER_RE, '').trimStart();
// Normalize CRLF -> LF FIRST. The line-anchored front-matter regex requires a
// bare `\n` after the opening `---`, and convertReferenceFootnotes splits on
// `\n`; a Windows/CRLF foreign file (`---\r\n…`) would otherwise slip past the
// front-matter strip and leak into the body. The canonical parser
// (page-file.ts parsePageFile) normalizes the same way before its FRONTMATTER_RE.
const src = markdown.replace(/\r\n/g, '\n');
const withoutFrontMatter = src.replace(YAML_FRONT_MATTER_RE, '').trimStart();
return convertReferenceFootnotes(withoutFrontMatter);
}