ci: upload test network logs

Signed-off-by: 0x009922 <[email protected]>

.github/workflows/iroha2-dev-pr.yml

@@ -81,6 +81,16 @@ jobs:
         env:
           RUSTFLAGS: "-C instrument-coverage"
           LLVM_PROFILE_FILE: "iroha-%p-%m.profraw"
+          TEST_NETWORK_TMP_DIR: /tmp
+      - name: Upload test network logs
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: test_network_logs
+          path: |
+            /tmp/irohad_test_network_*
+            !*/storage
+          if-no-files-found: 'ignore'
       - name: Generate lcov report
         if: always()
         run: grcov . --binary-path ./target/debug/ -s . -t lcov --branch --ignore-not-existing --ignore "crates/iroha_cli" --ignore "**/main.rs" -o lcov.info

crates/iroha_test_network/src/lib.rs

@@ -64,6 +64,16 @@ fn iroha_bin() -> impl AsRef<Path> {
     })
 }
 
+const TEMPDIR_PREFIX: &'static str = "irohad_test_network_";
+const TEMPDIR_IN_ENV: &str = "TEST_NETWORK_TMP_DIR";
+
+fn tempdir_in() -> Option<impl AsRef<Path>> {
+    static ENV: OnceLock<Option<PathBuf>> = OnceLock::new();
+
+    ENV.get_or_init(|| std::env::var(TEMPDIR_IN_ENV).map(|s| PathBuf::from(s)).ok())
+        .as_ref()
+}
+
 /// Network of peers
 pub struct Network {
     peers: Vec<NetworkPeer>,
@@ -444,12 +454,15 @@ impl NetworkPeer {
             socket_addr!(127.0.0.1:*port_p2p),
             key_pair.public_key().clone(),
         );
-        let temp_dir = Arc::new(
-            tempfile::Builder::new()
-                .keep(true)
-                .tempdir()
-                .expect("temp dirs are available in the system"),
-        );
+        let temp_dir = Arc::new({
+            let mut builder = tempfile::Builder::new();
+            builder.keep(true).prefix(TEMPDIR_PREFIX);
+            match tempdir_in() {
+                Some(path) => builder.tempdir_in(path),
+                None => builder.tempdir(),
+            }
+            .expect("temp dirs must be available in the system")
+        });
 
         let (events, _rx) = broadcast::channel(32);
         let (block_height, _rx) = watch::channel(None);