Fix missing outputs for jobs with matrix (#32823)

Fix #32795

If a job uses a matrix, multiple `ActionRunJobs` may have the same
`JobID`. We need to merge the outputs of these jobs to make them
available to the jobs that need them.

models/actions/run_job.go

@@ -137,7 +137,7 @@ func UpdateRunJob(ctx context.Context, job *ActionRunJob, cond builder.Cond, col
 		if err != nil {
 			return 0, err
 		}
-		run.Status = aggregateJobStatus(jobs)
+		run.Status = AggregateJobStatus(jobs)
 		if run.Started.IsZero() && run.Status.IsRunning() {
 			run.Started = timeutil.TimeStampNow()
 		}
@@ -152,7 +152,7 @@ func UpdateRunJob(ctx context.Context, job *ActionRunJob, cond builder.Cond, col
 	return affected, nil
 }
 
-func aggregateJobStatus(jobs []*ActionRunJob) Status {
+func AggregateJobStatus(jobs []*ActionRunJob) Status {
 	allDone := true
 	allWaiting := true
 	hasFailure := false

models/fixtures/action_run.yml

@@ -36,3 +36,22 @@
   updated: 1683636626
   need_approval: 0
   approved_by: 0
+-
+  id: 793
+  title: "job output"
+  repo_id: 4
+  owner_id: 1
+  workflow_id: "test.yaml"
+  index: 189
+  trigger_user_id: 1
+  ref: "refs/heads/master"
+  commit_sha: "c2d72f548424103f01ee1dc02889c1e2bff816b0"
+  event: "push"
+  is_fork_pull_request: 0
+  status: 1
+  started: 1683636528
+  stopped: 1683636626
+  created: 1683636108
+  updated: 1683636626
+  need_approval: 0
+  approved_by: 0

models/fixtures/action_run_job.yml

@@ -26,3 +26,46 @@
   status: 1
   started: 1683636528
   stopped: 1683636626
+-
+  id: 194
+  run_id: 793
+  repo_id: 4
+  owner_id: 1
+  commit_sha: c2d72f548424103f01ee1dc02889c1e2bff816b0
+  is_fork_pull_request: 0
+  name: job1 (1)
+  attempt: 1
+  job_id: job1
+  task_id: 49
+  status: 1
+  started: 1683636528
+  stopped: 1683636626
+-
+  id: 195
+  run_id: 793
+  repo_id: 4
+  owner_id: 1
+  commit_sha: c2d72f548424103f01ee1dc02889c1e2bff816b0
+  is_fork_pull_request: 0
+  name: job1 (2)
+  attempt: 1
+  job_id: job1
+  task_id: 50
+  status: 1
+  started: 1683636528
+  stopped: 1683636626
+-
+  id: 196
+  run_id: 793
+  repo_id: 4
+  owner_id: 1
+  commit_sha: c2d72f548424103f01ee1dc02889c1e2bff816b0
+  is_fork_pull_request: 0
+  name: job2
+  attempt: 1
+  job_id: job2
+  needs: [job1]
+  task_id: 51
+  status: 5
+  started: 1683636528
+  stopped: 1683636626

models/fixtures/action_task.yml

@@ -57,3 +57,63 @@
   log_length: 707
   log_size: 90179
   log_expired: 0
+-
+  id: 49
+  job_id: 194
+  attempt: 1
+  runner_id: 1
+  status: 1 # success
+  started: 1683636528
+  stopped: 1683636626
+  repo_id: 4
+  owner_id: 1
+  commit_sha: c2d72f548424103f01ee1dc02889c1e2bff816b0
+  is_fork_pull_request: 0
+  token_hash: b8d3962425466b6709b9ac51446f93260c54afe8e7b6d3686e34f991fb8a8953822b0deed86fe41a103f34bc48dbc4784220
+  token_salt: ffffffffff
+  token_last_eight: ffffffff
+  log_filename: artifact-test2/2f/47.log
+  log_in_storage: 1
+  log_length: 707
+  log_size: 90179
+  log_expired: 0
+-
+  id: 50
+  job_id: 195
+  attempt: 1
+  runner_id: 1
+  status: 1 # success
+  started: 1683636528
+  stopped: 1683636626
+  repo_id: 4
+  owner_id: 1
+  commit_sha: c2d72f548424103f01ee1dc02889c1e2bff816b0
+  is_fork_pull_request: 0
+  token_hash: b8d3962425466b6709b9ac51446f93260c54afe8e7b6d3686e34f991fb8a8953822b0deed86fe41a103f34bc48dbc4784221
+  token_salt: ffffffffff
+  token_last_eight: ffffffff
+  log_filename: artifact-test2/2f/47.log
+  log_in_storage: 1
+  log_length: 707
+  log_size: 90179
+  log_expired: 0
+-
+  id: 51
+  job_id: 196
+  attempt: 1
+  runner_id: 1
+  status: 6 # running
+  started: 1683636528
+  stopped: 1683636626
+  repo_id: 4
+  owner_id: 1
+  commit_sha: c2d72f548424103f01ee1dc02889c1e2bff816b0
+  is_fork_pull_request: 0
+  token_hash: b8d3962425466b6709b9ac51446f93260c54afe8e7b6d3686e34f991fb8a8953822b0deed86fe41a103f34bc48dbc4784222
+  token_salt: ffffffffff
+  token_last_eight: ffffffff
+  log_filename: artifact-test2/2f/47.log
+  log_in_storage: 1
+  log_length: 707
+  log_size: 90179
+  log_expired: 0

models/fixtures/action_task_output.yml

@@ -0,0 +1,20 @@
+-
+  id: 1
+  task_id: 49
+  output_key: output_a
+  output_value: abc
+-
+  id: 2
+  task_id: 49
+  output_key: output_b
+  output_value: ''
+-
+  id: 3
+  task_id: 50
+  output_key: output_a
+  output_value: ''
+-
+  id: 4
+  task_id: 50
+  output_key: output_b
+  output_value: bbb

routers/api/actions/runner/main_test.go

@@ -0,0 +1,14 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package runner
+
+import (
+	"testing"
+
+	"code.gitea.io/gitea/models/unittest"
+)
+
+func TestMain(m *testing.M) {
+	unittest.MainTest(m)
+}

routers/api/actions/runner/utils.go

@@ -162,28 +162,56 @@ func findTaskNeeds(ctx context.Context, task *actions_model.ActionTask) (map[str
 		return nil, fmt.Errorf("FindRunJobs: %w", err)
 	}
 
-	ret := make(map[string]*runnerv1.TaskNeed, len(needs))
+	jobIDJobs := make(map[string][]*actions_model.ActionRunJob)
 	for _, job := range jobs {
-		if !needs.Contains(job.JobID) {
+		jobIDJobs[job.JobID] = append(jobIDJobs[job.JobID], job)
+	}
+
+	ret := make(map[string]*runnerv1.TaskNeed, len(needs))
+	for jobID, jobsWithSameID := range jobIDJobs {
+		if !needs.Contains(jobID) {
 			continue
 		}
-		if job.TaskID == 0 || !job.Status.IsDone() {
-			// it shouldn't happen, or the job has been rerun
-			continue
+		var jobOutputs map[string]string
+		for _, job := range jobsWithSameID {
+			if job.TaskID == 0 || !job.Status.IsDone() {
+				// it shouldn't happen, or the job has been rerun
+				continue
+			}
+			got, err := actions_model.FindTaskOutputByTaskID(ctx, job.TaskID)
+			if err != nil {
+				return nil, fmt.Errorf("FindTaskOutputByTaskID: %w", err)
+			}
+			outputs := make(map[string]string, len(got))
+			for _, v := range got {
+				outputs[v.OutputKey] = v.OutputValue
+			}
+			if len(jobOutputs) == 0 {
+				jobOutputs = outputs
+			} else {
+				jobOutputs = mergeTwoOutputs(outputs, jobOutputs)
+			}
 		}
-		outputs := make(map[string]string)
-		got, err := actions_model.FindTaskOutputByTaskID(ctx, job.TaskID)
-		if err != nil {
-			return nil, fmt.Errorf("FindTaskOutputByTaskID: %w", err)
-		}
-		for _, v := range got {
-			outputs[v.OutputKey] = v.OutputValue
-		}
-		ret[job.JobID] = &runnerv1.TaskNeed{
-			Outputs: outputs,
-			Result:  runnerv1.Result(job.Status),
+		ret[jobID] = &runnerv1.TaskNeed{
+			Outputs: jobOutputs,
+			Result:  runnerv1.Result(actions_model.AggregateJobStatus(jobsWithSameID)),
 		}
 	}
 
 	return ret, nil
 }
+
+// mergeTwoOutputs merges two outputs from two different ActionRunJobs
+// Values with the same output name may be overridden. The user should ensure the output names are unique.
+// See https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions#using-job-outputs-in-a-matrix-job
+func mergeTwoOutputs(o1, o2 map[string]string) map[string]string {
+	ret := make(map[string]string, len(o1))
+	for k1, v1 := range o1 {
+		if len(v1) > 0 {
+			ret[k1] = v1
+		} else {
+			ret[k1] = o2[k1]
+		}
+	}
+	return ret
+}

routers/api/actions/runner/utils_test.go

@@ -0,0 +1,28 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package runner
+
+import (
+	"context"
+	"testing"
+
+	actions_model "code.gitea.io/gitea/models/actions"
+	"code.gitea.io/gitea/models/unittest"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_findTaskNeeds(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+
+	task := unittest.AssertExistsAndLoadBean(t, &actions_model.ActionTask{ID: 51})
+
+	ret, err := findTaskNeeds(context.Background(), task)
+	assert.NoError(t, err)
+	assert.Len(t, ret, 1)
+	assert.Contains(t, ret, "job1")
+	assert.Len(t, ret["job1"].Outputs, 2)
+	assert.Equal(t, "abc", ret["job1"].Outputs["output_a"])
+	assert.Equal(t, "bbb", ret["job1"].Outputs["output_b"])
+}