refactor: join iterators into a single walk

1 files changed, 39 insertions, 0 deletions

diff --git a/src/git.rs b/src/git.rs
new file mode 100644
index 0000000..afa4a9a
--- /dev/null
+++ b/src/git.rs
@@ -0,0 +1,39 @@
+use git2::{BranchType, Repository};
+use std::{path::PathBuf, time::Duration};
+
+use crate::{parser::Parser, project::Project};
+
+#[derive(Debug, Clone)]
+pub struct Git;
+
+impl Parser for Git {
+    #[tracing::instrument]
+    fn parse(&self, path_buf: PathBuf) -> Result<Project, Box<dyn std::error::Error>> {
+        Repository::open(&path_buf)?.parse(path_buf)
+    }
+}
+
+impl Parser for Repository {
+    fn parse(&self, path_buf: PathBuf) -> Result<Project, Box<dyn std::error::Error>> {
+        let mut branches = self.branches(Some(BranchType::Local))?;
+        let timestamp = branches
+            .try_fold(0, |latest, branch| -> std::result::Result<u64, _> {
+                let (branch, _) = branch?;
+
+                let name = branch
+                    .name()?
+                    .ok_or_else(|| git2::Error::from_str("Failed to find branch"))?;
+
+                self.revparse_single(name)?
+                    .peel_to_commit()
+                    .map(|c| (c.time().seconds() as u64).max(latest))
+            })
+            .map(Duration::from_secs)
+            .unwrap_or_default();
+
+        Ok(Project {
+            worktree: path_buf,
+            timestamp,
+        })
+    }
+}