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fix(mdx): Propagate ENOENT error code for missing MDX files #16038

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Merged
jaffrepaul merged 2 commits into from
Jan 21, 2026
Merged

fix(mdx): Propagate ENOENT error code for missing MDX files #16038

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52a4e18
fix(mdx): Propagate ENOENT error code for missing MDX files
seer-by-sentry[bot] Jan 15, 2026
aaa2c24
add more conditional error logic
jaffrepaul Jan 15, 2026
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17 changes: 15 additions & 2 deletions src/mdx.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -630,9 +630,22 @@ export async function getFileBySlug(slug: string): Promise<SlugFile> {
}
}
if (source === undefined || sourcePath === undefined) {
throw new Error(
`Failed to find a valid source file for slug "${slug}". Tried:\n${sourcePaths.join('\n')}\nErrors:\n${errors.map(e => e.message).join('\n')}`
// Check if we have any non-ENOENT errors (permission, file system errors, etc.)
const nonEnoentError = errors.find(
err => err && typeof err === 'object' && 'code' in err && err.code !== 'ENOENT'
);

// If there's a non-ENOENT error, throw it directly to preserve the original error
if (nonEnoentError) {
throw nonEnoentError;
}

// Otherwise, all errors are ENOENT (file not found), so we can safely report as such
const error = new Error(
`Failed to find a valid source file for slug "${slug}". Tried:\n${sourcePaths.join('\n')}\nErrors:\n${errors.map(e => e.message).join('\n')}`
) as Error & {code: string};
error.code = 'ENOENT';
throw error;
}

let cacheKey: string | null = null;
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