fix: Return if executors length is zero in ParallelExecutor (#960)

It displayed an unused log and start an unused go routine. We should check the executors number before continue.

```
INFO[2026-05-12T21:01:04-07:00] Running job with maxParallel=1 for 1 matrix combinations
INFO[2026-05-12T21:01:04-07:00] NewParallelExecutor: Creating 1 workers for 1 executors
INFO[2026-05-12T21:01:04-07:00] NewParallelExecutor: Creating 1 workers for 0 executors
INFO[2026-05-12T21:01:04-07:00] NewParallelExecutor: Creating 1 workers for 0 executors
```

Reviewed-on: https://gitea.com/gitea/runner/pulls/960
Reviewed-by: silverwind <[email protected]>
Reviewed-by: Nicolas <[email protected]>
Co-authored-by: Lunny Xiao <[email protected]>
Co-committed-by: Lunny Xiao <[email protected]>
This commit is contained in:
Lunny Xiao authored and Nicolas committed 2026-05-15 22:14:13 +00:00
1 parent 3c5f03ff8f
commit 5464d33eef
2 files changed
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@@ -97,6 +97,12 @@ func NewErrorExecutor(err error) Executor {
// NewParallelExecutor creates a new executor from a parallel of other executors
func NewParallelExecutor(parallel int, executors ...Executor) Executor {
if len(executors) == 0 {
return func(ctx context.Context) error {
return ctx.Err()
}
}
return func(ctx context.Context) error {
work := make(chan Executor, len(executors))
errs := make(chan error, len(executors))