Revert "Say that a deploy keeps only an app's volumes when the app has none"

This reverts commit cc786a1e84, at the
owner's request. It removes the app page sentence for an app with no
volume mounts, the matching deploy log line and its constant, their
tests, the README sentence and the TODO.md entry. The environment
variable hint keeps its alert-warning class, which is in the committed
stylesheet.

Model: opus-5-5

README.md

@@ -278,9 +278,6 @@ exist yet, upaas has Docker create it as an empty directory, owned by root, when
 the app's container starts; there is no need to create it first. An existing
 host path is left as it is. This needs Docker Engine 23.0 or later.
 
-A deploy or rollback replaces the app's container with a new one, which keeps
-only the files the app wrote to its volume mounts.
-
 ## License
 
 WTFPL

TODO.md

@@ -38,11 +38,6 @@ regress.
   style, instead of asking for a container restart, which keeps the old values
   (#255).
 
-- 2026-10-01: An app with no volume mounts says on its page, and in the log of
-  each deploy, that a deploy or rollback loses the files it writes and a restart
-  keeps them; the README's Volume mounts section says a deploy or rollback keeps
-  only the files the app wrote to its volume mounts (#248).
-
 - 2026-10-01: Builds attach a BuildKit session, as the docker command line does,
   so a base image that is not on the host is pulled instead of the build failing
   with "no active sessions" on Docker Engine 27. Container logs, and so the

internal/handlers/app.go

@@ -21,7 +21,6 @@ import (
 	"sneak.berlin/go/upaas/internal/database"
 	"sneak.berlin/go/upaas/internal/models"
 	"sneak.berlin/go/upaas/internal/service/app"
-	"sneak.berlin/go/upaas/internal/service/deploy"
 	"sneak.berlin/go/upaas/templates"
 )
 
@@ -195,7 +194,6 @@ func (h *Handlers) HandleAppDetail() http.HandlerFunc {
 			"EnvVars":          envVars,
 			"Labels":           labels,
 			"Volumes":          volumes,
-			"NoVolumesWarning": deploy.NoVolumesWarning,
 			"Ports":            ports,
 			"Deployments":      deployments,
 			"LatestDeployment": latestDeployment,

internal/handlers/app_no_volumes_test.go

@@ -1,45 +0,0 @@
-package handlers_test
-
-import (
-	"net/http"
-	"net/http/httptest"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-
-	"sneak.berlin/go/upaas/internal/models"
-	"sneak.berlin/go/upaas/internal/service/deploy"
-)
-
-// TestAppPageSaysFilesAreLostOnlyWhenAppHasNoVolumes checks that the app page
-// shows deploy.NoVolumesWarning until the app gets a volume mount.
-func TestAppPageSaysFilesAreLostOnlyWhenAppHasNoVolumes(t *testing.T) {
-	t.Parallel()
-
-	testCtx := setupTestHandlers(t)
-	createdApp := createTestApp(t, testCtx, "no-volumes-app")
-
-	renderAppPage := func() string {
-		request := httptest.NewRequestWithContext(
-			t.Context(), http.MethodGet, "/apps/"+createdApp.ID, nil,
-		)
-		request = addChiURLParams(request, map[string]string{"id": createdApp.ID})
-		recorder := httptest.NewRecorder()
-
-		testCtx.handlers.HandleAppDetail().ServeHTTP(recorder, request)
-		require.Equal(t, http.StatusOK, recorder.Code)
-
-		return recorder.Body.String()
-	}
-
-	assert.Contains(t, renderAppPage(), deploy.NoVolumesWarning)
-
-	volume := models.NewVolume(testCtx.database)
-	volume.AppID = createdApp.ID
-	volume.HostPath = "/srv/no-volumes-app"
-	volume.ContainerPath = "/data"
-	require.NoError(t, volume.Save(t.Context()))
-
-	assert.NotContains(t, renderAppPage(), deploy.NoVolumesWarning)
-}

internal/service/deploy/deploy.go

@@ -56,12 +56,6 @@ var (
 	ErrNoPreviousImage = errors.New("no previous image available for rollback")
 )
 
-// NoVolumesWarning is shown on the page of an app with no volume mounts and
-// written into each of its deploy logs.
-const NoVolumesWarning = "This app has no volume mounts, so the files it writes " +
-	"are lost whenever a deploy or rollback replaces its container; " +
-	"a restart of the container keeps them."
-
 // logFlushInterval is how often to flush buffered logs to the database.
 const logFlushInterval = time.Second
 
@@ -375,11 +369,6 @@ func (svc *Service) Deploy(
 
 	svc.logWebhookPayload(bgCtx, deployment, webhookEvent)
 
-	volumes, err := app.GetVolumes(bgCtx)
-	if err == nil && len(volumes) == 0 {
-		_ = deployment.AppendLog(bgCtx, NoVolumesWarning)
-	}
-
 	err = svc.updateAppStatusBuilding(bgCtx, app)
 	if err != nil {
 		return err

internal/service/deploy/deploy_volumes_test.go

@@ -1,79 +0,0 @@
-package deploy_test
-
-import (
-	"context"
-	"log/slog"
-	"os"
-	"strings"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-
-	"sneak.berlin/go/upaas/internal/config"
-	"sneak.berlin/go/upaas/internal/database"
-	"sneak.berlin/go/upaas/internal/docker"
-	"sneak.berlin/go/upaas/internal/logger"
-	"sneak.berlin/go/upaas/internal/models"
-	"sneak.berlin/go/upaas/internal/service/deploy"
-	"sneak.berlin/go/upaas/internal/service/notify"
-)
-
-// deployLog deploys a new app, with one volume mount when withVolume is set,
-// and returns the deploy's log. Docker is not connected, so the deploy fails
-// at the git clone, after the start of its log is written.
-func deployLog(t *testing.T, withVolume bool) string {
-	t.Helper()
-
-	log := logger.NewForTest(slog.New(slog.NewTextHandler(os.Stderr, nil)))
-	dataDir := t.TempDir()
-	cfg := &config.Config{DataDir: dataDir, HostDataDir: dataDir}
-	db := database.NewTestDatabase(t)
-
-	dockerClient, err := docker.New(nil, docker.Params{Logger: log, Config: cfg})
-	require.NoError(t, err)
-
-	notifySvc, err := notify.New(nil, notify.ServiceParams{Logger: log})
-	require.NoError(t, err)
-
-	svc, err := deploy.New(nil, deploy.ServiceParams{
-		Logger: log, Config: cfg, Database: db,
-		Docker: dockerClient, Notify: notifySvc,
-	})
-	require.NoError(t, err)
-
-	ctx := context.Background()
-
-	app := models.NewApp(db)
-	app.ID = "volumesapp-id"
-	app.Name = "volumesapp"
-	app.Branch = "main"
-	require.NoError(t, app.Save(ctx))
-
-	if withVolume {
-		volume := models.NewVolume(db)
-		volume.AppID = app.ID
-		volume.HostPath = "/srv/volumesapp"
-		volume.ContainerPath = "/data"
-		require.NoError(t, volume.Save(ctx))
-	}
-
-	err = svc.Deploy(ctx, app, nil, false)
-	require.ErrorIs(t, err, docker.ErrNotConnected)
-
-	deployments, err := app.GetDeployments(ctx, 1)
-	require.NoError(t, err)
-	require.Len(t, deployments, 1)
-
-	return deployments[0].Logs.String
-}
-
-func TestDeployLogSaysFilesAreLostOnlyWhenAppHasNoVolumes(t *testing.T) {
-	t.Parallel()
-
-	logWithoutVolumes := deployLog(t, false)
-	assert.Equal(t, 1, strings.Count(logWithoutVolumes, deploy.NoVolumesWarning),
-		logWithoutVolumes)
-
-	assert.NotContains(t, deployLog(t, true), deploy.NoVolumesWarning)
-}

templates/app_detail.html

@@ -318,8 +318,6 @@
                 </tbody>
             </table>
         </div>
-        {{else}}
-        <p class="alert-warning">{{.NoVolumesWarning}}</p>
         {{end}}
         <form method="POST" action="/apps/{{.App.ID}}/volumes" class="flex flex-col sm:flex-row gap-2 items-end">
                 {{ .CSRFField }}