build: bump git2 0.19 -> 0.20 to unlock ^ref spec

This depends on libgit2 1.9.0 which is contained in git2 0.20.

Author: bryango

Cargo.lock

@@ -69,7 +69,7 @@ git-branchless-smartlog = { version = "0.10.0", path = "git-branchless-smartlog"
 git-branchless-submit = { version = "0.10.0", path = "git-branchless-submit" }
 git-branchless-test = { version = "0.10.0", path = "git-branchless-test" }
 git-branchless-undo = { version = "0.10.0", path = "git-branchless-undo" }
-git2 = { version = "0.19.0", default-features = false }
+git2 = { version = "0.20.0", default-features = false }
 glob = "0.3.2"
 indexmap = "2.7.0"
 indicatif = { version = "0.17.9", features = ["improved_unicode"] }

Cargo.toml

@@ -117,12 +117,12 @@ fn install_tracing(effects: Effects) -> eyre::Result<impl Drop> {
 
 #[instrument]
 fn install_libgit2_tracing() {
-    fn git_trace(level: git2::TraceLevel, msg: &str) {
-        info!("[{:?}]: {}", level, msg);
+    fn git_trace(level: git2::TraceLevel, msg: &[u8]) {
+        info!("[{:?}]: {}", level, String::from_utf8_lossy(msg));
     }
 
-    if !git2::trace_set(git2::TraceLevel::Trace, git_trace) {
-        warn!("Failed to install libgit2 tracing");
+    if let Err(err) = git2::trace_set(git2::TraceLevel::Trace, git_trace) {
+        warn!("Failed to install libgit2 tracing: {err}");
     }
 }