ucd-generate 0.2.15

A program for generating packed representations of the Unicode character database that can be efficiently searched. 
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use std::collections::BTreeMap;

use ucd_parse::{self, JamoShortName};

use crate::args::ArgMatches;
use crate::error::Result;

pub fn command(args: ArgMatches<'_>) -> Result<()> {
    let dir = args.ucd_dir()?;
    let jamo_map = ucd_parse::parse_by_codepoint::<_, JamoShortName>(dir)?;

    let mut wtr = args.writer("jamo_short_name")?;
    let mut map = BTreeMap::new();
    for (cp, jamo) in jamo_map {
        map.insert(cp.value(), jamo.name);
    }
    wtr.codepoint_to_string(args.name(), &map)?;
    Ok(())
}