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

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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 <2021+silverwind@noreply.gitea.com>
Reviewed-by: Nicolas <bircni@icloud.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-committed-by: Lunny Xiao <xiaolunwen@gmail.com>
This commit is contained in:
Lunny Xiao
2026-05-15 22:14:13 +00:00
committed by Nicolas
parent 3c5f03ff8f
commit 5464d33eef
2 changed files with 20 additions and 0 deletions
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6
act/common/executor.go
View File

@@ -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))

14
act/common/executor_test.go
View File

@@ -12,6 +12,7 @@ import (
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestNewWorkflow(t *testing.T) {
@@ -119,6 +120,19 @@ func TestNewParallelExecutor(t *testing.T) {
assert.NoError(errSingle)
}
func TestNewParallelExecutorEmpty(t *testing.T) {
assert := assert.New(t)
ctx := context.Background()
require.NoError(t, NewParallelExecutor(2)(ctx))
canceledCtx, cancel := context.WithCancel(context.Background())
cancel()
err := NewParallelExecutor(2)(canceledCtx)
assert.ErrorIs(err, context.Canceled)
}
func TestNewParallelExecutorFailed(t *testing.T) {
assert := assert.New(t)