test(sys): ctest for experimental sha256 OID support

Author: weihanglo

.github/workflows/main.yml

@@ -36,6 +36,7 @@ jobs:
     - run: cargo test --locked
     - run: cargo test --features https,ssh
     - run: cargo run -p systest
+    - run: cargo run -p systest --features unstable-sha256
     - run: cargo test -p git2-curl
 
   rustfmt:

systest/Cargo.toml

@@ -11,3 +11,6 @@ libc = "0.2"
 
 [build-dependencies]
 ctest2 = "0.4"
+
+[features]
+unstable-sha256 = ["libgit2-sys/unstable-sha256"]

systest/build.rs

@@ -6,6 +6,14 @@ fn main() {
     if let Some(root) = env::var_os("DEP_GIT2_ROOT") {
         cfg.include(PathBuf::from(root).join("include"));
     }
+
+    // Enable the unstable-sha256 rust cfg
+    // so ctest2 sees the correct function signatures
+    if env::var("CARGO_FEATURE_UNSTABLE_SHA256").is_ok() {
+        cfg.cfg("feature", Some("unstable-sha256"));
+        cfg.define("GIT_EXPERIMENTAL_SHA256", Some("1"));
+    }
+
     cfg.header("git2.h")
         .header("git2/sys/errors.h")
         .header("git2/sys/transport.h")