[snowpatch] [PATCH] main: Run multiple branch tests in parallel

[Andrew Donnellan]

Spawn multiple Jenkins tests for different branches in parallel for the
same patch.

This is very very simplistic but should significantly enhance Jenkins
utilisation.

Signed-off-by: Andrew Donnellan <ajd at linux.ibm.com>
---
 src/main.rs | 25 ++++++++++++++++++++-----
 1 file changed, 20 insertions(+), 5 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 5ec0c37b2d7f..68ba9f9d5f47 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -208,6 +208,9 @@ fn test_patch(
     push_opts.remote_callbacks(push_callbacks);
 
     let mut successfully_applied = false;
+
+    let mut test_threads = vec![];
+
     for branch_name in project.branches.clone() {
         let tag = format!("{}_{}", tag, branch_name);
         info!("Configuring local branch for {}.", tag);
@@ -297,18 +300,30 @@ fn test_patch(
                     &base,
                     hefty_tests,
                 )
-            })
-            .unwrap();
-        results.append(&mut test.join().unwrap());
+            });
 
-        // Delete the remote branch now it's not needed any more
-        git::push_to_remote(&mut remote, &branch, true, &mut push_opts).unwrap();
+        match test {
+            Ok(thread) => test_threads.push((thread, branch)),
+            Err(e) => {
+                error!("Error spawning thread: {}", e);
+                git::push_to_remote(&mut remote, &branch, true, &mut push_opts).unwrap();
+            }
+        }
 
         if !test_all_branches {
             break;
         }
     }
 
+    // Wait for results
+    for (thread, branch) in test_threads {
+        results.append(&mut thread.join().unwrap());
+
+        // Delete the remote branch now it's not needed any more
+        git::push_to_remote(&mut remote, &branch, true, &mut push_opts).unwrap();
+    }
+
+
     if !successfully_applied {
         results.push(TestResult {
             state: TestState::Fail,
-- 
2.20.1