Update golangci-lint to v2.12.2 with canonical config (#187)

Bumps golangci-lint from v2.10.1 to v2.12.2 everywhere it is pinned and installs the canonical `.golangci.yml`, then fixes every finding the new linter surfaces so `make check` is green.

## Version pins

- `Dockerfile` lint stage: `golangci/golangci-lint:v2.12.2` (Debian-based), tag plus digest pin
- `script/bootstrap`: `GOLANGCI_LINT_VERSION=2.12.2` with updated `linux-amd64`/`linux-arm64` release-archive sha256 pins

## Config

`.golangci.yml` replaced with the canonical config. Material change: the old file declared `version: "2"` but kept settings under the legacy top-level `linters-settings` key, which golangci-lint v2 ignores — so the intended thresholds (`lll` 88, `funlen` 80/50, `cyclop` 15, `dupl` 100) were not being applied. The canonical file moves them under `linters.settings` and drops `issues.exclude-use-default`.

## Lint fixes (216 findings)

- `lll` (96): wrapped lines to the 88-column limit
- `noctx` (46): `httptest.NewRequestWithContext` with `t.Context()` throughout the tests
- `goconst` (24): shared constants for template/JSON keys in `internal/handlers` and repeated test literals
- `gosec` (23): app-page redirects now go through a `redirectToApp` helper that path-escapes the app ID (G710 open redirect); `http.ServeFile` of the internally derived deployment log path annotated like the adjacent `os.Stat` (G703)
- `dupl` (22): extracted a generic `findAllByAppID` in `internal/models`, a `deleteAppResource` helper in `internal/handlers`, a shared `parsePush` in `internal/service/webhook`, and table-driven/helper-based dedup in tests
- `nolintlint` (5): removed `//nolint:funlen` directives made obsolete by the new limits (plus one more that became obsolete after refactoring)
- `nilerr` (3, surfaced during fixing): resource-delete lookups now propagate the find error to the caller

No behavior changes intended; all tests pass and `make check` is green.

Note: golangci-lint v2.12 warns that `gomodguard` is deprecated in favor of `gomodguard_v2` — a future canonical-config update should address this centrally.
Co-authored-by: sneak <sneak@sneak.berlin>
Reviewed-on: #187
Co-authored-by: clawbot <clawbot@noreply.example.org>
Co-committed-by: clawbot <clawbot@noreply.example.org>

internal/service/deploy/deploy.go

@@ -66,7 +66,8 @@ const logFilePermissions = 0o640
 // logTimestampFormat is the format for log file timestamps.
 const logTimestampFormat = "20060102T150405Z"
 
-// logFileShortSHALength is the number of characters to use for commit SHA in log filenames.
+// logFileShortSHALength is the number of characters to use for commit SHA
+// in log filenames.
 const logFileShortSHALength = 12
 
 // dockerLogMessage represents a Docker build log message.
@@ -87,7 +88,10 @@ type deploymentLogWriter struct {
 	flushCtx   context.Context //nolint:containedctx // needed for async flush goroutine
 }
 
-func newDeploymentLogWriter(ctx context.Context, deployment *models.Deployment) *deploymentLogWriter {
+func newDeploymentLogWriter(
+	ctx context.Context,
+	deployment *models.Deployment,
+) *deploymentLogWriter {
 	w := &deploymentLogWriter{
 		deployment: deployment,
 		done:       make(chan struct{}),
@@ -257,7 +261,10 @@ func (svc *Service) GetBuildDir(appName string) string {
 
 // GetLogFilePath returns the path to the log file for a deployment.
 // Returns empty string if the path cannot be determined.
-func (svc *Service) GetLogFilePath(app *models.App, deployment *models.Deployment) string {
+func (svc *Service) GetLogFilePath(
+	app *models.App,
+	deployment *models.Deployment,
+) string {
 	hostname, err := os.Hostname()
 	if err != nil {
 		hostname = "unknown"
@@ -275,7 +282,8 @@ func (svc *Service) GetLogFilePath(app *models.App, deployment *models.Deploymen
 	// Use started_at timestamp
 	timestamp := deployment.StartedAt.UTC().Format(logTimestampFormat)
 
-	// Build filename: appname_sha_timestamp.log.txt (or appname_timestamp.log.txt if no SHA)
+	// Build filename: appname_sha_timestamp.log.txt
+	// (or appname_timestamp.log.txt if no SHA)
 	var filename string
 	if sha != "" {
 		filename = fmt.Sprintf("%s_%s_%s.log.txt", app.Name, sha, timestamp)
@@ -308,7 +316,8 @@ func (svc *Service) CancelDeploy(appID string) bool {
 
 // Deploy deploys an app. If cancelExisting is true (e.g. webhook-triggered),
 // any in-progress deploy for the same app will be cancelled before starting.
-// If cancelExisting is false and a deploy is in progress, ErrDeploymentInProgress is returned.
+// If cancelExisting is false and a deploy is in progress,
+// ErrDeploymentInProgress is returned.
 func (svc *Service) Deploy(
 	ctx context.Context,
 	app *models.App,
@@ -342,7 +351,8 @@ func (svc *Service) Deploy(
 	// Fetch webhook event and create deployment record
 	webhookEvent := svc.fetchWebhookEvent(deployCtx, webhookEventID)
 
-	// Use a background context for DB operations that must complete regardless of cancellation
+	// Use a background context for DB operations that must complete
+	// regardless of cancellation
 	bgCtx := context.WithoutCancel(deployCtx)
 
 	deployment, err := svc.createDeploymentRecord(bgCtx, app, webhookEventID, webhookEvent)
@@ -401,7 +411,10 @@ func (svc *Service) createRollbackDeployment(
 		return nil, fmt.Errorf("failed to create rollback deployment: %w", saveErr)
 	}
 
-	_ = deployment.AppendLog(ctx, "Rolling back to previous image: "+app.PreviousImageID.String)
+	_ = deployment.AppendLog(
+		ctx,
+		"Rolling back to previous image: "+app.PreviousImageID.String,
+	)
 
 	return deployment, nil
 }
@@ -417,7 +430,11 @@ func (svc *Service) executeRollback(
 
 	svc.removeOldContainer(ctx, app, deployment)
 
-	rollbackOpts, err := svc.buildContainerOptions(ctx, app, docker.ImageID(previousImageID))
+	rollbackOpts, err := svc.buildContainerOptions(
+		ctx,
+		app,
+		docker.ImageID(previousImageID),
+	)
 	if err != nil {
 		svc.failDeployment(bgCtx, app, deployment, err)
 
@@ -426,7 +443,12 @@ func (svc *Service) executeRollback(
 
 	containerID, err := svc.docker.CreateContainer(ctx, rollbackOpts)
 	if err != nil {
-		svc.failDeployment(bgCtx, app, deployment, fmt.Errorf("failed to create rollback container: %w", err))
+		svc.failDeployment(
+			bgCtx,
+			app,
+			deployment,
+			fmt.Errorf("failed to create rollback container: %w", err),
+		)
 
 		return fmt.Errorf("failed to create rollback container: %w", err)
 	}
@@ -436,7 +458,12 @@ func (svc *Service) executeRollback(
 
 	startErr := svc.docker.StartContainer(ctx, containerID)
 	if startErr != nil {
-		svc.failDeployment(bgCtx, app, deployment, fmt.Errorf("failed to start rollback container: %w", startErr))
+		svc.failDeployment(
+			bgCtx,
+			app,
+			deployment,
+			fmt.Errorf("failed to start rollback container: %w", startErr),
+		)
 
 		return fmt.Errorf("failed to start rollback container: %w", startErr)
 	}
@@ -695,7 +722,11 @@ func (svc *Service) cleanupCancelledDeploy(
 		if removeErr != nil {
 			svc.log.Error("failed to remove image from cancelled deploy",
 				"error", removeErr, "app", app.Name, "image", imageID)
-			_ = deployment.AppendLog(ctx, "WARNING: failed to clean up image "+imageID.String()+": "+removeErr.Error())
+			_ = deployment.AppendLog(
+				ctx,
+				"WARNING: failed to clean up image "+
+					imageID.String()+": "+removeErr.Error(),
+			)
 		} else {
 			svc.log.Info("cleaned up image from cancelled deploy",
 				"app", app.Name, "image", imageID)
@@ -870,14 +901,24 @@ func (svc *Service) cloneRepository(
 
 	err := os.MkdirAll(appBuildsDir, buildsDirPermissions)
 	if err != nil {
-		svc.failDeployment(ctx, app, deployment, fmt.Errorf("failed to create builds dir: %w", err))
+		svc.failDeployment(
+			ctx,
+			app,
+			deployment,
+			fmt.Errorf("failed to create builds dir: %w", err),
+		)
 
 		return "", nil, fmt.Errorf("failed to create builds dir: %w", err)
 	}
 
 	buildDir, err := os.MkdirTemp(appBuildsDir, fmt.Sprintf("%d-*", deployment.ID))
 	if err != nil {
-		svc.failDeployment(ctx, app, deployment, fmt.Errorf("failed to create temp dir: %w", err))
+		svc.failDeployment(
+			ctx,
+			app,
+			deployment,
+			fmt.Errorf("failed to create temp dir: %w", err),
+		)
 
 		return "", nil, fmt.Errorf("failed to create temp dir: %w", err)
 	}
@@ -908,7 +949,12 @@ func (svc *Service) cloneRepository(
 	)
 	if cloneErr != nil {
 		cleanup()
-		svc.failDeployment(ctx, app, deployment, fmt.Errorf("failed to clone repo: %w", cloneErr))
+		svc.failDeployment(
+			ctx,
+			app,
+			deployment,
+			fmt.Errorf("failed to clone repo: %w", cloneErr),
+		)
 
 		return "", nil, fmt.Errorf("failed to clone repo: %w", cloneErr)
 	}

internal/service/deploy/deploy_cleanup_test.go

@@ -32,7 +32,10 @@ func TestCleanupCancelledDeploy_RemovesBuildDir(t *testing.T) {
 	require.NoError(t, os.MkdirAll(deployDir, 0o750))
 
 	// Create a file inside to verify full removal
-	require.NoError(t, os.WriteFile(filepath.Join(deployDir, "work"), []byte("test"), 0o600))
+	require.NoError(
+		t,
+		os.WriteFile(filepath.Join(deployDir, "work"), []byte("test"), 0o600),
+	)
 
 	// Also create a dir for a different deployment (should NOT be removed)
 	otherDir := filepath.Join(buildDir, "99-xyz789")

internal/service/deploy/deploy_container_test.go

@@ -31,7 +31,9 @@ func TestBuildContainerOptionsUsesImageID(t *testing.T) {
 
 	const expectedImageID = docker.ImageID("sha256:abc123def456")
 
-	opts, err := svc.BuildContainerOptionsExported(context.Background(), app, expectedImageID)
+	opts, err := svc.BuildContainerOptionsExported(
+		context.Background(), app, expectedImageID,
+	)
 	if err != nil {
 		t.Fatalf("buildContainerOptions returned error: %v", err)
 	}
@@ -77,14 +79,20 @@ func TestBuildContainerOptionsNoResourceLimits(t *testing.T) {
 	}
 }
 
-func TestBuildContainerOptionsCPULimit(t *testing.T) {
-	t.Parallel()
+// buildOptsForApp saves an app configured by setup and returns the container
+// options built for it.
+func buildOptsForApp(
+	t *testing.T,
+	name string,
+	setup func(app *models.App),
+) docker.CreateContainerOptions {
+	t.Helper()
 
 	db := database.NewTestDatabase(t)
 
 	app := models.NewApp(db)
-	app.Name = "cpulimit"
-	app.CPULimit = sql.NullFloat64{Float64: 0.5, Valid: true}
+	app.Name = name
+	setup(app)
 
 	err := app.Save(context.Background())
 	if err != nil {
@@ -101,6 +109,16 @@ func TestBuildContainerOptionsCPULimit(t *testing.T) {
 		t.Fatalf("buildContainerOptions returned error: %v", err)
 	}
 
+	return opts
+}
+
+func TestBuildContainerOptionsCPULimit(t *testing.T) {
+	t.Parallel()
+
+	opts := buildOptsForApp(t, "cpulimit", func(app *models.App) {
+		app.CPULimit = sql.NullFloat64{Float64: 0.5, Valid: true}
+	})
+
 	if opts.CPULimit != 0.5 {
 		t.Errorf("expected CPULimit=0.5, got %v", opts.CPULimit)
 	}
@@ -109,26 +127,9 @@ func TestBuildContainerOptionsCPULimit(t *testing.T) {
 func TestBuildContainerOptionsMemoryLimit(t *testing.T) {
 	t.Parallel()
 
-	db := database.NewTestDatabase(t)
-
-	app := models.NewApp(db)
-	app.Name = "memlimit"
-	app.MemoryLimit = sql.NullInt64{Int64: 536870912, Valid: true} // 512m
-
-	err := app.Save(context.Background())
-	if err != nil {
-		t.Fatalf("failed to save app: %v", err)
-	}
-
-	log := slog.New(slog.NewTextHandler(os.Stderr, nil))
-	svc := deploy.NewTestService(log)
-
-	opts, err := svc.BuildContainerOptionsExported(
-		context.Background(), app, docker.ImageID("test:latest"),
-	)
-	if err != nil {
-		t.Fatalf("buildContainerOptions returned error: %v", err)
-	}
+	opts := buildOptsForApp(t, "memlimit", func(app *models.App) {
+		app.MemoryLimit = sql.NullInt64{Int64: 536870912, Valid: true} // 512m
+	})
 
 	if opts.MemoryLimit != 536870912 {
 		t.Errorf("expected MemoryLimit=536870912, got %v", opts.MemoryLimit)

internal/service/deploy/export_test.go

@@ -26,7 +26,11 @@ func (svc *Service) CancelActiveDeploy(appID string) {
 }
 
 // RegisterActiveDeploy registers an active deploy for testing.
-func (svc *Service) RegisterActiveDeploy(appID string, cancel context.CancelFunc, done chan struct{}) {
+func (svc *Service) RegisterActiveDeploy(
+	appID string,
+	cancel context.CancelFunc,
+	done chan struct{},
+) {
 	svc.activeDeploys.Store(appID, &activeDeploy{cancel: cancel, done: done})
 }
 
@@ -41,7 +45,11 @@ func (svc *Service) UnlockApp(appID string) {
 }
 
 // NewTestServiceWithConfig creates a Service with config and docker client for testing.
-func NewTestServiceWithConfig(log *slog.Logger, cfg *config.Config, dockerClient *docker.Client) *Service {
+func NewTestServiceWithConfig(
+	log *slog.Logger,
+	cfg *config.Config,
+	dockerClient *docker.Client,
+) *Service {
 	return &Service{
 		log:    log,
 		config: cfg,