Update .gitignore to include log files and database journal files. Modify go.mod to update dependencies for go-sqlite3 and cloud.google.com/go/compute/metadata. Enhance Makefile to include logging options for manager and runner commands. Introduce new job token handling in auth package and implement database migration scripts. Refactor manager and runner components to improve job processing and metadata extraction. Add support for video preview in frontend components and enhance WebSocket management for channel subscriptions.

internal/runner/blender/binary.go

@@ -0,0 +1,87 @@
+// Package blender handles Blender binary management and execution.
+package blender
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+
+	"jiggablend/internal/runner/api"
+	"jiggablend/internal/runner/workspace"
+)
+
+// Manager handles Blender binary downloads and management.
+type Manager struct {
+	manager      *api.ManagerClient
+	workspaceDir string
+}
+
+// NewManager creates a new Blender manager.
+func NewManager(managerClient *api.ManagerClient, workspaceDir string) *Manager {
+	return &Manager{
+		manager:      managerClient,
+		workspaceDir: workspaceDir,
+	}
+}
+
+// GetBinaryPath returns the path to the Blender binary for a specific version.
+// Downloads from manager and extracts if not already present.
+func (m *Manager) GetBinaryPath(version string) (string, error) {
+	blenderDir := filepath.Join(m.workspaceDir, "blender-versions")
+	if err := os.MkdirAll(blenderDir, 0755); err != nil {
+		return "", fmt.Errorf("failed to create blender directory: %w", err)
+	}
+
+	// Check if already installed - look for version folder first
+	versionDir := filepath.Join(blenderDir, version)
+	binaryPath := filepath.Join(versionDir, "blender")
+
+	// Check if version folder exists and contains the binary
+	if versionInfo, err := os.Stat(versionDir); err == nil && versionInfo.IsDir() {
+		// Version folder exists, check if binary is present
+		if binaryInfo, err := os.Stat(binaryPath); err == nil {
+			// Verify it's actually a file (not a directory)
+			if !binaryInfo.IsDir() {
+				log.Printf("Found existing Blender %s installation at %s", version, binaryPath)
+				return binaryPath, nil
+			}
+		}
+		// Version folder exists but binary is missing - might be incomplete installation
+		log.Printf("Version folder %s exists but binary not found, will re-download", versionDir)
+	}
+
+	// Download from manager
+	log.Printf("Downloading Blender %s from manager", version)
+
+	reader, err := m.manager.DownloadBlender(version)
+	if err != nil {
+		return "", err
+	}
+	defer reader.Close()
+
+	// Manager serves pre-decompressed .tar files - extract directly
+	log.Printf("Extracting Blender %s...", version)
+	if err := workspace.ExtractTarStripPrefix(reader, versionDir); err != nil {
+		return "", fmt.Errorf("failed to extract blender: %w", err)
+	}
+
+	// Verify binary exists
+	if _, err := os.Stat(binaryPath); err != nil {
+		return "", fmt.Errorf("blender binary not found after extraction")
+	}
+
+	log.Printf("Blender %s installed at %s", version, binaryPath)
+	return binaryPath, nil
+}
+
+// GetBinaryForJob returns the Blender binary path for a job.
+// Uses the version from metadata or falls back to system blender.
+func (m *Manager) GetBinaryForJob(version string) (string, error) {
+	if version == "" {
+		return "blender", nil // System blender
+	}
+
+	return m.GetBinaryPath(version)
+}
+