use std::{collections::HashSet, io::Write, path::Path}; use anyhow::{bail, Context};use git_repository as git; use crate::OutputFormat; pub const PROGRESS_RANGE: std::ops::RangeInclusive<u8> = 1..=2; pub fn verify(path: impl AsRef<Path>, format: OutputFormat, mut out: impl Write) -> anyhow::Result<()> {    if format != OutputFormat::Human {        bail!("Only 'human' format is currently supported");    }    let path = path.as_ref();    let buf = std::fs::read(path).with_context(|| format!("Failed to read mailmap file at '{}'", path.display()))?;    let mut err_count = 0;    for err in git::mailmap::parse(&buf).filter_map(Result::err) {        err_count += 1;        writeln!(out, "{}", err)?;    }     let mut seen = HashSet::<(_, _)>::default();    for entry in git::mailmap::parse(&buf).filter_map(Result::ok) {        if !seen.insert((entry.old_email(), entry.old_name())) {            writeln!(                out,                "NOTE: entry ({:?}, {:?}) -> ({:?}, {:?}) is being overwritten",                entry.old_email(),                entry.old_name(),                entry.new_email(),                entry.new_name()            )?;        }    }     if err_count == 0 {        writeln!(out, "{} lines OK", git::mailmap::parse(&buf).count())?;        Ok(())    } else {        bail!("{} lines in '{}' could not be parsed", err_count, path.display());    }}