Remove git2 dependency.

Author: ehuss

Cargo.toml

@@ -37,7 +37,6 @@ clippy_lints = { version = "0.0.212", path = "clippy_lints" }
 regex = "1"
 semver = "0.9"
 rustc_tools_util = { version = "0.2.0", path = "rustc_tools_util"}
-git2 = { version = "0.12", optional = true }
 tempfile = { version = "3.1.0", optional = true }
 lazy_static = "1.0"
 
@@ -60,4 +59,4 @@ rustc_tools_util = { version = "0.2.0", path = "rustc_tools_util"}
 
 [features]
 deny-warnings = []
-integration = ["git2", "tempfile"]
+integration = ["tempfile"]

tests/integration.rs

@@ -1,7 +1,5 @@
 #![cfg(feature = "integration")]
 
-use git2::Repository;
-
 use std::env;
 use std::process::Command;
 
@@ -19,7 +17,11 @@ fn integration_test() {
         .path()
         .join(crate_name);
 
-    Repository::clone(&repo_url, &repo_dir).expect("clone of repo failed");
+    let st = Command::new("git")
+        .args(&["clone", "--depth=1", &repo_url, repo_dir.to_str().unwrap()])
+        .status()
+        .expect("unstable to run git");
+    assert!(st.success());
 
     let root_dir = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"));
     let target_dir = std::path::Path::new(&root_dir).join("target");