Git support (#143)

src-tauri/yaak-git/src/pull.rs

@@ -0,0 +1,54 @@
+use crate::callbacks::default_callbacks;
+use crate::error::Error::NoActiveBranch;
+use crate::error::Result;
+use crate::merge::do_merge;
+use crate::repository::open_repo;
+use crate::util::{bytes_to_string, get_current_branch};
+use git2::{FetchOptions, ProxyOptions};
+use log::debug;
+use serde::{Deserialize, Serialize};
+use std::path::Path;
+use ts_rs::TS;
+
+#[derive(Debug, Clone, Serialize, Deserialize, TS, PartialEq)]
+#[serde(rename_all = "camelCase")]
+#[ts(export, export_to = "gen_git.ts")]
+pub(crate) struct PullResult {
+    received_bytes: usize,
+    received_objects: usize,
+}
+
+pub(crate) fn git_pull(dir: &Path) -> Result<PullResult> {
+    let repo = open_repo(dir)?;
+
+    let branch = get_current_branch(&repo)?.ok_or(NoActiveBranch)?;
+    let branch_ref = branch.get();
+    let branch_ref = bytes_to_string(branch_ref.name_bytes())?;
+
+    let remote_name = repo.branch_upstream_remote(&branch_ref)?;
+    let remote_name = bytes_to_string(&remote_name)?;
+    debug!("Pulling from {remote_name}");
+
+    let mut remote = repo.find_remote(&remote_name)?;
+
+    let mut options = FetchOptions::new();
+    let callbacks = default_callbacks();
+    options.remote_callbacks(callbacks);
+
+    let mut proxy = ProxyOptions::new();
+    proxy.auto();
+    options.proxy_options(proxy);
+
+    remote.fetch(&[&branch_ref], Some(&mut options), None)?;
+
+    let stats = remote.stats();
+
+    let fetch_head = repo.find_reference("FETCH_HEAD")?;
+    let fetch_commit = repo.reference_to_annotated_commit(&fetch_head)?;
+    do_merge(&repo, &branch, &fetch_commit)?;
+
+    Ok(PullResult {
+        received_bytes: stats.received_bytes(),
+        received_objects: stats.received_objects(),
+    })
+}