feat(cli): warn user if setting autostart on workspace with template-level autostart (coder#20454)

Fixes: coder#15619

Author: mtojek

cli/schedule.go

@@ -176,6 +176,22 @@ func (r *RootCmd) scheduleStart() *serpent.Command {
 				}
 
 				schedStr = ptr.Ref(sched.String())
+
+				// Check if the template has autostart requirements that may conflict
+				// with the user's schedule.
+				template, err := client.Template(inv.Context(), workspace.TemplateID)
+				if err != nil {
+					return xerrors.Errorf("get template: %w", err)
+				}
+
+				if len(template.AutostartRequirement.DaysOfWeek) > 0 {
+					_, _ = fmt.Fprintf(
+						inv.Stderr,
+						"Warning: your workspace template restricts autostart to the following days: %s.\n"+
+							"Your workspace may only autostart on these days.\n",
+						strings.Join(template.AutostartRequirement.DaysOfWeek, ", "),
+					)
+				}
 			}
 
 			err = client.UpdateWorkspaceAutostart(inv.Context(), workspace.ID, codersdk.UpdateWorkspaceAutostartRequest{

cli/schedule_test.go

@@ -373,3 +373,67 @@ func TestScheduleOverride(t *testing.T) {
 		})
 	}
 }
+
+//nolint:paralleltest // t.Setenv
+func TestScheduleStart_TemplateAutostartRequirement(t *testing.T) {
+	t.Setenv("TZ", "UTC")
+	loc, err := tz.TimezoneIANA()
+	require.NoError(t, err)
+	require.Equal(t, "UTC", loc.String())
+
+	client := coderdtest.New(t, &coderdtest.Options{IncludeProvisionerDaemon: true})
+	user := coderdtest.CreateFirstUser(t, client)
+
+	version := coderdtest.CreateTemplateVersion(t, client, user.OrganizationID, nil)
+	coderdtest.AwaitTemplateVersionJobCompleted(t, client, version.ID)
+	template := coderdtest.CreateTemplate(t, client, user.OrganizationID, version.ID)
+
+	// Update template to have autostart requirement
+	// Note: In AGPL, this will be ignored and all days will be allowed (enterprise feature).
+	template, err = client.UpdateTemplateMeta(context.Background(), template.ID, codersdk.UpdateTemplateMeta{
+		AutostartRequirement: &codersdk.TemplateAutostartRequirement{
+			DaysOfWeek: []string{"monday", "wednesday", "friday"},
+		},
+	})
+	require.NoError(t, err)
+
+	// Verify the template - in AGPL, AutostartRequirement will have all days (enterprise feature)
+	template, err = client.Template(context.Background(), template.ID)
+	require.NoError(t, err)
+	require.NotEmpty(t, template.AutostartRequirement.DaysOfWeek, "template should have autostart requirement days")
+
+	workspace := coderdtest.CreateWorkspace(t, client, template.ID)
+	coderdtest.AwaitWorkspaceBuildJobCompleted(t, client, workspace.LatestBuild.ID)
+
+	t.Run("ShowsWarning", func(t *testing.T) {
+		// When: user sets autostart schedule
+		inv, root := clitest.New(t,
+			"schedule", "start", workspace.Name, "9:30AM", "Mon-Fri",
+		)
+		clitest.SetupConfig(t, client, root)
+		pty := ptytest.New(t).Attach(inv)
+		require.NoError(t, inv.Run())
+
+		// Then: warning should be shown
+		// In AGPL, this will show all days (enterprise feature defaults to all days allowed)
+		pty.ExpectMatch("Warning")
+		pty.ExpectMatch("may only autostart")
+	})
+
+	t.Run("NoWarningWhenManual", func(t *testing.T) {
+		// When: user sets manual schedule
+		inv, root := clitest.New(t,
+			"schedule", "start", workspace.Name, "manual",
+		)
+		clitest.SetupConfig(t, client, root)
+
+		var stderrBuf bytes.Buffer
+		inv.Stderr = &stderrBuf
+
+		require.NoError(t, inv.Run())
+
+		// Then: no warning should be shown on stderr
+		stderrOutput := stderrBuf.String()
+		require.NotContains(t, stderrOutput, "Warning")
+	})
+}