Function convertObsidianExcalidraw

apps/desktop/src/main/vault.ts:3052–3084

(root: string, rel: string)

 * is left in place. Returns the new drawing's metadata. (#266)
 */
export async function convertObsidianExcalidraw(root: string, rel: string): Promise<NoteMeta> {
  const abs = resolveSafe(root, rel)
  const folder = folderOf(root, abs)
  if (!folder) throw new Error(`Drawing is not in a known folder: ${rel}`)
  const markdown = await fs.readFile(abs, 'utf8')
  if (!isObsidianExcalidrawPath(rel) && !isObsidianExcalidrawMarkdown(markdown)) {
    throw new Error('This file is not an Obsidian Excalidraw drawing.')
  }
  const scene = extractObsidianExcalidrawScene(markdown)
  if (!scene) {
    throw new Error('Could not read an Excalidraw scene from this file.')
  }

  const fileName = path.basename(abs)
  const base =
    (fileName.toLowerCase().endsWith('.excalidraw.md')
      ? fileName.slice(0, -'.excalidraw.md'.length)
      : path.basename(fileName, path.extname(fileName))) || 'Untitled drawing'
  const dir = path.dirname(abs)
  let finalTitle = base
  for (let n = 2; ; n++) {
    try {
      await fs.access(path.join(dir, `${finalTitle}.excalidraw`))
      finalTitle = `${base} ${n}`
    } catch {
      break
    }
  }
  const destAbs = path.join(dir, `${finalTitle}.excalidraw`)
  await fs.writeFile(destAbs, JSON.stringify(scene, null, 2), 'utf8')
  invalidateNoteMetaCache(root, toPosix(path.relative(root, destAbs)))
  return await readMeta(root, destAbs, folder)
}

/**
 * Move a markdown file that lives outside the vault into the vault's