Honor cancellation before transcript delivery

internal/cli/process_output_test.go

@@ -3,6 +3,7 @@ package cli
 import (
 	"bytes"
 	"context"
+	"errors"
 	"os"
 	"path/filepath"
 	"strings"
@@ -127,6 +128,70 @@ func TestDeliveryFailureSuppressesCompletionSummary(t *testing.T) {
 
 }
 
+func TestCanceledEmptyPipelineLeavesTranscriptAndFinalizesReports(t *testing.T) {
+	dir := t.TempDir()
+	for name, contents := range map[string]string{
+		"config.yml":      "version: 3\npipeline: {stages: []}\n",
+		"transcript.json": `[{"speaker":"Alice","start":0,"end":1,"text":"hello"}]`,
+		"output.json":     "previous transcript",
+	} {
+		if err := os.WriteFile(filepath.Join(dir, name), []byte(contents), 0600); err != nil {
+			t.Fatal(err)
+		}
+	}
+	input := processInput{
+		Config:     commandkit.Supplied[string]{Value: filepath.Join(dir, "config.yml"), Set: true},
+		Transcript: filepath.Join(dir, "transcript.json"),
+		Output:     commandkit.Supplied[string]{Value: filepath.Join(dir, "output.json"), Set: true},
+	}
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	cmd := commandkit.NewCommand(commandkit.CommandSpec[struct{}]{Name: "deliver", Run: func(inv commandkit.Invocation, _ struct{}) commandkit.Outcome {
+		loaded, err := loadProcessInputs(inv.Context, input, inv.ReportingMode())
+		if err != nil {
+			t.Fatal(err)
+		}
+		prepared, err := prepareProcess(inv.Context, input, loaded, inv.Reporter().Output())
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer prepared.Prepared.Output.Close()
+		result, err := executePipeline(inv.Context, loaded, prepared, sourceToCanonicalTranscript(loaded.Source), func(error) {})
+		if err != nil {
+			t.Fatal(err)
+		}
+		cancel()
+		return finishProcess(inv, input, loaded, prepared, result.Snapshot, []byte("new transcript"), nil)
+	}})
+	app, err := commandkit.New(commandkit.Identity{Name: "test"}, cmd)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var stdout, stderr bytes.Buffer
+	outcome := app.Execute(ctx, []string{"deliver", "--verbose"}, commandkit.Streams{Out: &stdout, Err: &stderr})
+	if outcome.Status == 0 || !errors.Is(outcome.Cause, context.Canceled) || strings.Contains(stderr.String(), "Completed:") {
+		t.Fatalf("outcome=%+v stderr=%q", outcome, stderr.String())
+	}
+	if data, err := os.ReadFile(input.Output.Value); err != nil || string(data) != "previous transcript" {
+		t.Fatalf("transcript changed after cancellation: %q, %v", data, err)
+	}
+	var errorsDoc reporting.ErrorsDocument
+	var recoveries reporting.RecoveriesDocument
+	for name, target := range map[string]any{"errors.yml": &errorsDoc, "recoveries.yml": &recoveries} {
+		data, err := os.ReadFile(filepath.Join(dir, name))
+		if err != nil {
+			t.Fatal(err)
+		}
+		if err := yaml.Unmarshal(data, target); err != nil {
+			t.Fatal(err)
+		}
+	}
+	if errorsDoc.Status != reporting.StatusFailed || recoveries.Status != reporting.StatusFailed ||
+		len(errorsDoc.Errors) != 1 || errorsDoc.Errors[0].Reason != "canceled" {
+		t.Fatalf("reports did not capture cancellation: %+v %+v", errorsDoc, recoveries)
+	}
+}
+
 type shortProcessWriter struct{}
 
 func (shortProcessWriter) Write(data []byte) (int, error) { return len(data) / 2, nil }