feat: add ComfyUI symlink functionality and subcommands

Adds subcommand structure (download, link, both) to the ComfyUI downloader script, allowing users to download models from HuggingFace and/or create symlinks to ComfyUI model directories. Features include:

- New subcommands: download (download only), link (symlink only), both (default)
- ComfyUI directory configuration (--comfyui-dir, default: ~/ComfyUI/models)
- Smart symlink creation to appropriate ComfyUI subdirectories (checkpoints, vae, loras, controlnet, upscale_models, etc.)
- YAML configuration extended with 'type' and 'filename' fields for precise model organization
- Automatic ComfyUI subdirectory creation
- Graceful handling of existing symlinks and files
- HF_TOKEN validation only when needed (download/both commands)
- Example configuration file (comfyui_models.example.yaml) demonstrating proper setup

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

artifact_comfyui_download.sh

@@ -1,9 +1,11 @@
 #!/bin/bash
 #
 # ComfyUI Model Downloader - A Beautiful CLI Tool
-# Downloads AI models from HuggingFace with style and grace
+# Downloads AI models from HuggingFace and creates symlinks to ComfyUI directories
 #
-# Usage: ./artifact_comfyui_download.sh [options]
+# Usage: ./artifact_comfyui_download.sh [COMMAND] [options]
+#
+# Commands: download, link, both (default)
 #
 
 set -euo pipefail
@@ -98,6 +100,12 @@ fi
 # Default cache directory (use HuggingFace default)
 CACHE_DIR="${CACHE_DIR:-${HOME}/.cache/huggingface}"
 
+# Default ComfyUI models directory
+COMFYUI_DIR="${COMFYUI_DIR:-${HOME}/ComfyUI/models}"
+
+# Default command
+COMMAND="both"
+
 # HuggingFace token from environment or .env file
 if [[ -f "${PROJECT_ROOT}/.env" ]]; then
     HF_TOKEN=$(grep ^HF_TOKEN "${PROJECT_ROOT}/.env" | cut -d'=' -f2- | tr -d '"' | tr -d "'" || true)
@@ -196,7 +204,9 @@ try:
             description = model.get('description', '')
             size_gb = model.get('size_gb', 0)
             essential = model.get('essential', False)
-            print(f"{repo_id}|{description}|{size_gb}|{essential}")
+            model_type = model.get('type', 'checkpoints')
+            filename = model.get('filename', '')
+            print(f"{repo_id}|{description}|{size_gb}|{essential}|{model_type}|{filename}")
     else:
         sys.exit(1)
 except Exception as e:
@@ -244,6 +254,9 @@ check_dependencies() {
 validate_config() {
     print_section "Validating Configuration"
 
+    # Show current command
+    print_info "Command: ${BOLD_CYAN}${COMMAND}${RESET}"
+
     if [[ -n "$CONFIG_FILE" ]]; then
         if [[ ! -f "$CONFIG_FILE" ]]; then
             print_error "Configuration file not found: $CONFIG_FILE"
@@ -254,17 +267,77 @@ validate_config() {
         print_warning "No configuration file specified"
     fi
 
+    # HF_TOKEN only required for download and both commands
+    if [[ "$COMMAND" == "download" ]] || [[ "$COMMAND" == "both" ]]; then
         if [[ -z "$HF_TOKEN" ]]; then
             print_error "HF_TOKEN not set. Please set it in .env file or environment."
             exit 1
         fi
         print_success "HuggingFace token configured: ${DIM}${HF_TOKEN:0:10}...${RESET}"
+    fi
 
+    # Cache directory
+    if [[ "$COMMAND" == "download" ]] || [[ "$COMMAND" == "both" ]]; then
         if [[ ! -d "$CACHE_DIR" ]]; then
             print_info "Creating cache directory: ${CYAN}${CACHE_DIR}${RESET}"
             mkdir -p "$CACHE_DIR"
         fi
         print_success "Cache directory ready: ${CYAN}${CACHE_DIR}${RESET}"
+    else
+        print_info "Cache directory: ${CYAN}${CACHE_DIR}${RESET}"
+    fi
+
+    # ComfyUI directory
+    if [[ "$COMMAND" == "link" ]] || [[ "$COMMAND" == "both" ]]; then
+        print_info "ComfyUI directory: ${CYAN}${COMFYUI_DIR}${RESET}"
+    fi
+}
+
+# Find model files in HuggingFace cache
+find_model_files() {
+    local repo_id="$1"
+    local filename_filter="$2"
+
+    python3 - <<EOPYFINDFIND
+import os
+import sys
+from pathlib import Path
+
+cache_dir = '${CACHE_DIR}'
+repo_id = '${repo_id}'
+filename_filter = '${filename_filter}'
+
+# HuggingFace cache structure: cache_dir/hub/models--org--name/snapshots/hash/
+cache_path = Path(cache_dir) / 'hub'
+repo_path = repo_id.replace('/', '--')
+model_dir = cache_path / f'models--{repo_path}'
+
+if not model_dir.exists():
+    sys.exit(1)
+
+# Find the latest snapshot
+snapshots_dir = model_dir / 'snapshots'
+if not snapshots_dir.exists():
+    sys.exit(1)
+
+# Get all snapshot directories sorted by modification time
+snapshots = sorted(snapshots_dir.iterdir(), key=lambda x: x.stat().st_mtime, reverse=True)
+if not snapshots:
+    sys.exit(1)
+
+latest_snapshot = snapshots[0]
+
+# Find model files
+for file_path in latest_snapshot.rglob('*'):
+    if file_path.is_file():
+        # If filename filter is specified, only match those files
+        if filename_filter and filename_filter not in file_path.name:
+            continue
+        # Skip metadata files
+        if file_path.name.endswith(('.json', '.txt', '.md', '.gitattributes')):
+            continue
+        print(str(file_path))
+EOPYFINDFIND
 }
 
 # Download a single model
@@ -311,8 +384,62 @@ EOPYDOWNLOAD
     fi
 }
 
-# Download models by category
+# Create symlink for a model
-download_category() {
+link_model() {
+    local repo_id="$1"
+    local model_type="$2"
+    local filename_filter="$3"
+
+    print_detail "Linking to: ${CYAN}${COMFYUI_DIR}/${model_type}/${RESET}"
+
+    # Create ComfyUI subdirectory if it doesn't exist
+    local target_dir="${COMFYUI_DIR}/${model_type}"
+    if [[ ! -d "$target_dir" ]]; then
+        print_info "Creating directory: ${CYAN}${target_dir}${RESET}"
+        mkdir -p "$target_dir"
+    fi
+
+    # Find model files in cache
+    local model_files
+    model_files=$(find_model_files "$repo_id" "$filename_filter")
+
+    if [[ -z "$model_files" ]]; then
+        print_warning "No model files found in cache for ${repo_id}"
+        return 1
+    fi
+
+    local linked_count=0
+    while IFS= read -r source_file; do
+        if [[ -f "$source_file" ]]; then
+            local filename=$(basename "$source_file")
+            local link_path="${target_dir}/${filename}"
+
+            # Remove existing symlink or file if it exists
+            if [[ -L "$link_path" ]]; then
+                rm -f "$link_path"
+            elif [[ -e "$link_path" ]]; then
+                print_warning "File already exists (not a symlink): ${filename}"
+                continue
+            fi
+
+            # Create symlink
+            ln -s "$source_file" "$link_path"
+            print_detail "${LINK} Linked: ${DIM}${filename}${RESET}"
+            ((linked_count++))
+        fi
+    done <<< "$model_files"
+
+    if [[ $linked_count -gt 0 ]]; then
+        print_success "Linked ${linked_count} file(s) for ${BOLD_WHITE}${repo_id}${RESET}"
+        return 0
+    else
+        print_error "Failed to link files for ${repo_id}"
+        return 1
+    fi
+}
+
+# Process models by category
+process_category() {
     local category="$1"
     local category_display="$2"
 
@@ -333,13 +460,31 @@ download_category() {
     local succeeded=0
     local failed=0
 
-    while IFS='|' read -r repo_id description size_gb essential; do
+    while IFS='|' read -r repo_id description size_gb essential model_type filename; do
         ((current++))
 
         echo ""
         print_step "$current" "$total_models" "${BOLD_MAGENTA}${description}${RESET}"
 
-        if download_model "$repo_id" "$description" "$size_gb"; then
+        local success=true
+
+        # Download if command is 'download' or 'both'
+        if [[ "$COMMAND" == "download" ]] || [[ "$COMMAND" == "both" ]]; then
+            if ! download_model "$repo_id" "$description" "$size_gb"; then
+                success=false
+            fi
+        fi
+
+        # Link if command is 'link' or 'both'
+        if [[ "$COMMAND" == "link" ]] || [[ "$COMMAND" == "both" ]]; then
+            if $success; then
+                if ! link_model "$repo_id" "$model_type" "$filename"; then
+                    success=false
+                fi
+            fi
+        fi
+
+        if $success; then
             ((succeeded++))
         else
             ((failed++))
@@ -417,13 +562,13 @@ main() {
     local total_succeeded=0
     local total_failed=0
 
-    # Download each category
+    # Process each category
     while IFS= read -r category; do
         # Get category display name (capitalize and add spaces)
         local category_display
         category_display=$(echo "$category" | sed 's/_/ /g' | sed 's/\b\(.\)/\u\1/g')
 
-        download_category "$category" "$category_display"
+        process_category "$category" "$category_display"
 
         # Update counters (this is simplified, you'd need to track actual numbers)
         ((total_succeeded++))
@@ -451,16 +596,32 @@ while [[ $# -gt 0 ]]; do
             CACHE_DIR="$2"
             shift 2
             ;;
+        --comfyui-dir)
+            COMFYUI_DIR="$2"
+            shift 2
+            ;;
+        download|link|both)
+            COMMAND="$1"
+            shift
+            ;;
         -h|--help)
-            echo "Usage: $0 [CONFIG_FILE] [options]"
+            echo "Usage: $0 [COMMAND] [options]"
             echo ""
-            echo "Arguments:"
+            echo "Commands:"
-            echo "  CONFIG_FILE           Configuration file path (optional, can also use -c)"
+            echo "  download              Download models only (default: both)"
+            echo "  link                  Create symlinks only (models must already be downloaded)"
+            echo "  both                  Download and create symlinks (default)"
             echo ""
             echo "Options:"
             echo "  -c, --config FILE     Configuration file (default: NONE)"
             echo "  --cache-dir DIR       Cache directory (default: ~/.cache/huggingface)"
+            echo "  --comfyui-dir DIR     ComfyUI models directory (default: ~/ComfyUI/models)"
             echo "  -h, --help            Show this help message"
+            echo ""
+            echo "Examples:"
+            echo "  $0 download -c models.yaml"
+            echo "  $0 link --comfyui-dir /opt/ComfyUI/models"
+            echo "  $0 both -c models.yaml --cache-dir /data/hf-cache"
             exit 0
             ;;
         -*)

comfyui_models.example.yaml

@@ -0,0 +1,80 @@
+# ComfyUI Models Configuration Example
+#
+# This file defines which models to download from HuggingFace
+# and where to symlink them in your ComfyUI installation.
+#
+# Model types correspond to ComfyUI subdirectories:
+#   - checkpoints: Stable Diffusion checkpoints
+#   - vae: VAE models
+#   - loras: LoRA models
+#   - controlnet: ControlNet models
+#   - clip: CLIP models
+#   - clip_vision: CLIP Vision models
+#   - upscale_models: Upscaler models
+#   - embeddings: Textual inversion embeddings
+#   - hypernetworks: Hypernetwork models
+#   - style_models: Style transfer models
+
+settings:
+  cache_dir: ~/.cache/huggingface
+  parallel_downloads: 1
+
+model_categories:
+  # Stable Diffusion Checkpoints
+  checkpoints:
+    - repo_id: runwayml/stable-diffusion-v1-5
+      description: Stable Diffusion v1.5
+      size_gb: 4
+      essential: true
+      type: checkpoints
+      filename: ""  # Empty means all model files
+
+    - repo_id: stabilityai/stable-diffusion-xl-base-1.0
+      description: SDXL Base 1.0
+      size_gb: 7
+      essential: true
+      type: checkpoints
+      filename: ""
+
+  # VAE Models
+  vae:
+    - repo_id: stabilityai/sd-vae-ft-mse-original
+      description: SD VAE ft MSE
+      size_gb: 0.3
+      essential: true
+      type: vae
+      filename: ""
+
+  # LoRA Models
+  loras:
+    - repo_id: latent-consistency/lcm-lora-sdv1-5
+      description: LCM LoRA for SD v1.5
+      size_gb: 0.1
+      essential: false
+      type: loras
+      filename: ""
+
+  # ControlNet Models
+  controlnet:
+    - repo_id: lllyasviel/control_v11p_sd15_canny
+      description: ControlNet Canny
+      size_gb: 1.4
+      essential: false
+      type: controlnet
+      filename: ""
+
+    - repo_id: lllyasviel/control_v11p_sd15_openpose
+      description: ControlNet OpenPose
+      size_gb: 1.4
+      essential: false
+      type: controlnet
+      filename: ""
+
+  # Upscale Models
+  upscale_models:
+    - repo_id: ai-forever/Real-ESRGAN
+      description: Real-ESRGAN x4
+      size_gb: 0.1
+      essential: false
+      type: upscale_models
+      filename: "RealESRGAN_x4plus.pth"