feat: multiple improvements, additions, vibin'

functions/nvm_auto_use.fish

@@ -1,17 +1,130 @@
 function nvm_auto_use --on-variable PWD
-  set -l nvmrc_file (nvm_find_nvmrc)
-  if test -n "$nvmrc_file"
-    set -l node_version (cat "$nvmrc_file")
-
-    # Check the current version
-    set -l current_version (node -v 2>/dev/null | sed 's/v//')
-
-    if test "$node_version" != "$current_version"
-      if not nvm use $node_version 2>/dev/null
-        echo "Node.js version $node_version not found, installing..."
-        nvm install $node_version && nvm use $node_version
-      end
+    # Detect available Node.js version manager
+    set -l available_managers (nvm_compat_detect 2>/dev/null | tail -n 1)
+    if test -z "$available_managers"
+        return
     end
-  end
-end
 
+    # Use preferred manager or first available
+    set -l manager
+    if test -n "$_nvm_auto_use_preferred_manager"
+        if contains "$_nvm_auto_use_preferred_manager" $available_managers
+            set manager "$_nvm_auto_use_preferred_manager"
+        end
+    end
+
+    if test -z "$manager"
+        set manager $available_managers[1]
+    end
+
+    # Check if project detection is enabled and we're in a Node.js project
+    if set -q _nvm_auto_use_project_only
+        if not nvm_project_detect
+            return
+        end
+    end
+
+    # Export NODE_VERSION environment variable
+    if command -q node
+        set -gx NODE_VERSION (node -v 2>/dev/null | string replace 'v' '')
+    end
+
+    # Check for excluded directories
+    set -l current_dir (pwd)
+    for pattern in $_nvm_auto_use_excluded_dirs node_modules .git
+        if string match -q "*/$pattern" "$current_dir"; or string match -q "*/$pattern/*" "$current_dir"
+            return
+        end
+    end
+
+    # Debouncing: prevent rapid switching
+    set -l debounce_ms (_nvm_auto_use_get_debounce)
+    set -l current_time (date +%s%3N 2>/dev/null; or date +%s)
+    if test -n "$_nvm_auto_use_last_change"
+        set -l time_diff (math "$current_time - $_nvm_auto_use_last_change")
+        if test $time_diff -lt $debounce_ms
+            return
+        end
+    end
+    set -g _nvm_auto_use_last_change $current_time
+
+    set -l nvmrc_file (nvm_find_nvmrc)
+
+    # Cache check: if same file and version, skip processing
+    if test "$nvmrc_file" = "$_nvm_auto_use_cached_file"
+        return
+    end
+
+    if test -n "$nvmrc_file"
+        set -l node_version (nvm_extract_version "$nvmrc_file")
+
+        # Cache the file path
+        set -g _nvm_auto_use_cached_file "$nvmrc_file"
+
+        # Validate node version format (basic semver or major version)
+        if not string match -qr '^v?[0-9]+(\..*)?$' "$node_version"
+            if not set -q _nvm_auto_use_silent
+                echo "Invalid Node.js version format in $nvmrc_file: $node_version" >&2
+            end
+            return 1
+        end
+
+        # Remove 'v' prefix if present
+        set node_version (string replace -r '^v' '' "$node_version")
+
+        # Cache the version
+        set -g _nvm_auto_use_cached_version "$node_version"
+
+        # Check the current version
+        set -l current_version
+        if command -q node
+            set current_version (node -v 2>/dev/null | sed 's/v//')
+        end
+
+        if test "$node_version" != "$current_version"
+            if not set -q _nvm_auto_use_silent
+                echo "Switching to Node.js v$node_version"
+            end
+
+            # Send notification if enabled
+            if not set -q _nvm_auto_use_silent
+                nvm_notify "Switched to Node.js v$node_version"
+            end
+
+            if not nvm_compat_use $manager $node_version 2>/dev/null
+                # Check if auto-install is disabled
+                if set -q _nvm_auto_use_no_install
+                    if not set -q _nvm_auto_use_silent
+                        echo "Node.js version $node_version not found (auto-install disabled)" >&2
+                    end
+                    return 1
+                end
+
+                if not set -q _nvm_auto_use_silent
+                    echo "Node.js version $node_version not found, installing..."
+                end
+                if nvm_compat_install $manager $node_version >/dev/null 2>&1
+                    nvm_compat_use $manager $node_version >/dev/null 2>&1
+                    if not set -q _nvm_auto_use_silent
+                        echo "Installed and switched to Node.js v$node_version"
+                    end
+                else
+                    if not set -q _nvm_auto_use_silent
+                        echo "Failed to install Node.js version $node_version" >&2
+                    end
+                    return 1
+                end
+            end
+
+            # Update cached version after successful switch
+            set -g _nvm_auto_use_cached_version "$node_version"
+
+            # Update NODE_VERSION environment variable
+            set -gx NODE_VERSION "$node_version"
+        end
+    else
+        # Clear cache if no .nvmrc found
+        set -e _nvm_auto_use_cached_file
+        set -e _nvm_auto_use_cached_version
+    end
+end