1use crate::Oid;
 2use anyhow::{anyhow, Result};
 3use collections::HashMap;
 4use std::path::Path;
 5use std::process::Command;
 6
 7pub fn get_messages(working_directory: &Path, shas: &[Oid]) -> Result<HashMap<Oid, String>> {
 8    const MARKER: &'static str = "<MARKER>";
 9
10    let output = Command::new("git")
11        .current_dir(working_directory)
12        .arg("show")
13        .arg("-s")
14        .arg(format!("--format=%B{}", MARKER))
15        .args(shas.iter().map(ToString::to_string))
16        .output()
17        .map_err(|e| anyhow!("Failed to start git blame process: {}", e))?;
18
19    anyhow::ensure!(
20        output.status.success(),
21        "'git show' failed with error {:?}",
22        output.status
23    );
24
25    Ok(shas
26        .iter()
27        .cloned()
28        .zip(
29            String::from_utf8_lossy(&output.stdout)
30                .trim()
31                .split_terminator(MARKER)
32                .map(|str| String::from(str.trim())),
33        )
34        .collect::<HashMap<Oid, String>>())
35}