fix: keep bounded event consume runs alive after stdin EOF (#1285)

cmd/event/consume.go

@@ -64,8 +64,8 @@ Use 'event schema <EventKey>' for parameter details.`,
 	cmd.Flags().StringVar(&o.jqExpr, "jq", "", "JQ expression to filter output")
 	cmd.Flags().BoolVar(&o.quiet, "quiet", false, "Suppress informational messages on stderr")
 	cmd.Flags().StringVar(&o.outputDir, "output-dir", "", "Write each event as a file in this directory (relative paths only; absolute paths and ~ are rejected to prevent path traversal)")
-	cmd.Flags().IntVar(&o.maxEvents, "max-events", 0, "Exit after N successful emits (0 = unlimited). Multi-worker EventKeys may emit up to workers-1 past N before all workers stop.")
-	cmd.Flags().DurationVar(&o.timeout, "timeout", 0, "Exit after DURATION (e.g. 30s, 2m). 0 = no timeout. Timeout is a normal exit (code 0; stderr 'reason: timeout').")
+	cmd.Flags().IntVar(&o.maxEvents, "max-events", 0, "Exit after N successful emits (0 = unlimited). Multi-worker EventKeys may emit up to workers-1 past N before all workers stop. Bounded runs ignore stdin EOF.")
+	cmd.Flags().DurationVar(&o.timeout, "timeout", 0, "Exit after DURATION (e.g. 30s, 2m). 0 = no timeout. Timeout is a normal exit (code 0; stderr 'reason: timeout'). Bounded runs ignore stdin EOF.")
 	cmd.Flags().String("as", "auto", "identity type: user | bot | auto (must match EventKey's declared AuthTypes)")
 	_ = cmd.RegisterFlagCompletionFunc("as", func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
 		return []string{"user", "bot", "auto"}, cobra.ShellCompDirectiveNoFileComp
@@ -184,8 +184,9 @@ func runConsume(cmd *cobra.Command, f *cmdutil.Factory, eventKey string, o consu
 		errOut = io.Discard
 	}
 
-	// Non-TTY only: stdin EOF is shutdown for subprocess callers; in TTY Ctrl-D must not exit.
-	if !f.IOStreams.IsTerminal {
+	// Non-TTY unbounded consumers use stdin EOF as shutdown for subprocess callers.
+	// Bounded runs already have --max-events/--timeout as their lifecycle control.
+	if shouldWatchStdinEOF(f.IOStreams.IsTerminal, o.maxEvents, o.timeout) {
 		watchStdinEOF(os.Stdin, cancel, errOut)
 	}
 
@@ -370,3 +371,8 @@ func watchStdinEOF(r io.Reader, cancel context.CancelFunc, errOut io.Writer) {
 		cancel()
 	}()
 }
+
+// shouldWatchStdinEOF gates the stdin-EOF shutdown watcher: non-TTY unbounded runs only (<= 0 mirrors downstream's >0-is-bounded semantics, so negative bounds stay unbounded).
+func shouldWatchStdinEOF(isTerminal bool, maxEvents int, timeout time.Duration) bool {
+	return !isTerminal && maxEvents <= 0 && timeout <= 0
+}

cmd/event/consume_stdin_test.go

@@ -61,3 +61,70 @@ func TestWatchStdinEOF_DiagnosticMessage(t *testing.T) {
 		t.Fatal("watchStdinEOF did not cancel within 1s of EOF")
 	}
 }
+
+func TestShouldWatchStdinEOF(t *testing.T) {
+	tests := []struct {
+		name       string
+		isTerminal bool
+		maxEvents  int
+		timeout    time.Duration
+		want       bool
+	}{
+		{
+			name:       "terminal",
+			isTerminal: true,
+			want:       false,
+		},
+		{
+			name: "non terminal unbounded",
+			want: true,
+		},
+		{
+			name:      "non terminal negative max events is unbounded",
+			maxEvents: -1,
+			want:      true,
+		},
+		{
+			name:    "non terminal negative timeout is unbounded",
+			timeout: -1 * time.Second,
+			want:    true,
+		},
+		{
+			name:      "non terminal max events bounded",
+			maxEvents: 1,
+			want:      false,
+		},
+		{
+			name:    "non terminal timeout bounded",
+			timeout: 10 * time.Minute,
+			want:    false,
+		},
+		{
+			name:      "non terminal both bounds positive",
+			maxEvents: 1,
+			timeout:   10 * time.Minute,
+			want:      false,
+		},
+		{
+			name:      "non terminal bounded max events with negative timeout",
+			maxEvents: 1,
+			timeout:   -1 * time.Second,
+			want:      false,
+		},
+		{
+			name:      "non terminal bounded timeout with negative max events",
+			maxEvents: -1,
+			timeout:   10 * time.Minute,
+			want:      false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := shouldWatchStdinEOF(tt.isTerminal, tt.maxEvents, tt.timeout)
+			if got != tt.want {
+				t.Fatalf("shouldWatchStdinEOF() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}