use std::{io::Write, process::Stdio};
use anyhow::{anyhow, bail, Context, Result};
pub fn verify(repo: gix::Repository, rev_spec: Option<&str>) -> Result<()> {
let rev_spec = rev_spec.unwrap_or("HEAD");
let commit = repo
.rev_parse_single(format!("{rev_spec}^{{commit}}").as_str())?
.object()?
.into_commit();
let (signature, signed_data) = commit
.signature()
.context("Could not parse commit to obtain signature")?
.ok_or_else(|| anyhow!("Commit at {rev_spec} is not signed"))?;
let mut signature_storage = tempfile::NamedTempFile::new()?;
signature_storage.write_all(signature.as_ref())?;
let signed_storage = signature_storage.into_temp_path();
let mut cmd = std::process::Command::new("gpg");
cmd.args(["--keyid-format=long", "--status-fd=1", "--verify"])
.arg(&signed_storage)
.arg("-")
.stdin(Stdio::piped());
gix::trace::debug!("About to execute {cmd:?}");
let mut child = cmd.spawn()?;
child
.stdin
.take()
.expect("configured")
.write_all(signed_data.to_bstring().as_ref())?;
if !child.wait()?.success() {
bail!("Command {cmd:?} failed");
}
Ok(())
}
pub fn describe(
mut repo: gix::Repository,
rev_spec: Option<&str>,
mut out: impl std::io::Write,
mut err: impl std::io::Write,
describe::Options {
all_tags,
all_refs,
first_parent,
always,
statistics,
max_candidates,
long_format,
dirty_suffix,
}: describe::Options,
) -> Result<()> {
repo.object_cache_size_if_unset(4 * 1024 * 1024);
let commit = match rev_spec {
Some(spec) => repo.rev_parse_single(spec)?.object()?.try_into_commit()?,
None => repo.head_commit()?,
};
use gix::commit::describe::SelectRef::*;
let select_ref = if all_refs {
AllRefs
} else if all_tags {
AllTags
} else {
Default::default()
};
let resolution = commit
.describe()
.names(select_ref)
.traverse_first_parent(first_parent)
.id_as_fallback(always)
.max_candidates(max_candidates)
.try_resolve()?
.with_context(|| format!("Did not find a single candidate ref for naming id '{}'", commit.id))?;
if statistics {
writeln!(err, "traversed {} commits", resolution.outcome.commits_seen)?;
}
let mut describe_id = resolution.format_with_dirty_suffix(dirty_suffix)?;
describe_id.long(long_format);
writeln!(out, "{describe_id}")?;
Ok(())
}
pub mod describe {
#[derive(Debug, Clone)]
pub struct Options {
pub all_tags: bool,
pub all_refs: bool,
pub first_parent: bool,
pub always: bool,
pub long_format: bool,
pub statistics: bool,
pub max_candidates: usize,
pub dirty_suffix: Option<String>,
}
}