Minimal frontmatter splitter for a full markdown document: `---\n \n---\n `. Enough for templates and the CLI; values may be quoted strings or `[a, b]` arrays. Not a full YAML parser.
(doc: &str)
| 296 | /// `---\n<key: value lines>\n---\n<body>`. Enough for templates and the CLI; |
| 297 | /// values may be quoted strings or `[a, b]` arrays. Not a full YAML parser. |
| 298 | pub fn parse_markdown(doc: &str) -> Result<(Map<String, Value>, String)> { |
| 299 | // Normalize CRLF so a Windows-authored file parses identically to LF — |
| 300 | // otherwise the "---\n" prefix match fails and the whole doc is silently |
| 301 | // treated as body with empty frontmatter. |
| 302 | let normalized = doc |
| 303 | .strip_prefix('\u{feff}') |
| 304 | .unwrap_or(doc) |
| 305 | .replace("\r\n", "\n"); |
| 306 | let doc = normalized.as_str(); |
| 307 | let rest = match doc.strip_prefix("---\n") { |
| 308 | Some(r) => r, |
| 309 | None => return Ok((Map::new(), doc.to_string())), |
| 310 | }; |
| 311 | let end = rest |
| 312 | .find("\n---") |
| 313 | .ok_or_else(|| CanonicalError::Lift("unterminated frontmatter block".into()))?; |
| 314 | let fm_src = &rest[..end]; |
| 315 | // body starts after the closing --- line |
| 316 | let after = &rest[end + 1..]; // at "---..." |
| 317 | let body = after |
| 318 | .strip_prefix("---") |
| 319 | .map(|b| b.trim_start_matches(['\n', '\r']).to_string()) |
| 320 | .unwrap_or_default(); |
| 321 | |
| 322 | let mut fm = Map::new(); |
| 323 | for line in fm_src.lines() { |
| 324 | let line = line.trim(); |
| 325 | if line.is_empty() { |
| 326 | continue; |
| 327 | } |
| 328 | if let Some(colon) = line.find(':') { |
| 329 | let key = line[..colon].trim().to_string(); |
| 330 | let raw = line[colon + 1..].trim(); |
| 331 | fm.insert(key, parse_scalar(raw)); |
| 332 | } |
| 333 | } |
| 334 | Ok((fm, body)) |
| 335 | } |
| 336 | |
| 337 | fn parse_scalar(raw: &str) -> Value { |
| 338 | if raw.starts_with('[') && raw.ends_with(']') { |