pub fn write_csv<W: Write>(
space: &FuncSpace,
source_path: &Path,
writer: W,
) -> Result<()>Expand description
Write a CSV document for the metric tree rooted at space. The
source_path is recorded in the path column of every row; if it
is not valid UTF-8 the entire document is skipped (header + zero
rows) and a warning is emitted to stderr — there is no useful
fallback for a CSV identifier.
§Errors
Returns any io::Error surfaced by the underlying csv::Writer
while emitting the header row or any of the per-FuncSpace data
rows. The error preserves the cause from the wrapped writer.