Use anyhow

Cargo.lock

@@ -20,6 +20,12 @@ dependencies = [
  "version_check",
 ]
 
+[[package]]
+name = "anyhow"
+version = "1.0.68"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2cb2f989d18dd141ab8ae82f64d1a8cdd37e0840f73a406896cf5e99502fab61"
+
 [[package]]
 name = "arc-swap"
 version = "1.6.0"
@@ -576,6 +582,7 @@ dependencies = [
 name = "git-lot"
 version = "0.0.0"
 dependencies = [
+ "anyhow",
  "clap",
  "git-repository",
 ]

Cargo.toml

@@ -4,5 +4,6 @@ version = "0.0.0"
 edition = "2021"
 
 [dependencies]
+anyhow = "1.0.68"
 clap = { version = "4.1.1", features = ["derive", "deprecated"] }
 git-repository = "0.33.0"

src/main.rs

@@ -46,30 +46,23 @@ impl git_repository::traverse::tree::Visit for TreeVisitor {
     }
 }
 
-fn print_commit(commit: &Commit) {
+fn print_commit(commit: &Commit) -> anyhow::Result<()> {
     println!("{commit:?}");
-    println!("{:?}", commit.message().unwrap());
+    println!("{:?}", commit.message()?);
     let mut recorder = Recorder::default();
-    commit
+    commit.tree()?.traverse().breadthfirst(&mut recorder)?;
-        .tree()
-        .unwrap()
-        .traverse()
-        .breadthfirst(&mut recorder)
-        .unwrap();
     println!("{recorder:#?}");
     println!();
+    Ok(())
 }
 
-fn main() {
+fn main() -> anyhow::Result<()> {
     let args = Args::parse();
-    let repo = git_repository::discover(args.repo).unwrap();
+    let repo = git_repository::discover(args.repo)?;
-    let commit = repo.head_commit().unwrap();
+    let commit = repo.head_commit()?;
-    for ancestor in commit.ancestors().all().unwrap() {
+    for ancestor in commit.ancestors().all()? {
-        let ancestor = repo
+        let ancestor = repo.find_object(ancestor.unwrap())?.try_into_commit()?;
-            .find_object(ancestor.unwrap())
+        print_commit(&ancestor)?;
-            .unwrap()
-            .try_into_commit()
-            .unwrap();
-        print_commit(&ancestor);
     }
+    Ok(())
 }