add ssh config include

internal/config/ssh.go

@@ -96,25 +96,45 @@ func ParseSSHConfig() ([]SSHHost, error) {
 
 // ParseSSHConfigFile parses a specific SSH config file and returns the list of hosts
 func ParseSSHConfigFile(configPath string) ([]SSHHost, error) {
+	return parseSSHConfigFileWithProcessedFiles(configPath, make(map[string]bool))
+}
+
+// parseSSHConfigFileWithProcessedFiles parses SSH config with include support
+func parseSSHConfigFileWithProcessedFiles(configPath string, processedFiles map[string]bool) ([]SSHHost, error) {
+	// Resolve absolute path to prevent infinite recursion
+	absPath, err := filepath.Abs(configPath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to resolve absolute path for %s: %w", configPath, err)
+	}
+
+	// Check for circular includes
+	if processedFiles[absPath] {
+		return []SSHHost{}, nil // Skip already processed files silently
+	}
+	processedFiles[absPath] = true
+
 	// Check if the file exists, otherwise create it (and the parent directory if needed)
 	if _, err := os.Stat(configPath); os.IsNotExist(err) {
-		// Ensure .ssh directory exists with proper permissions
-		if err := ensureSSHDirectory(); err != nil {
-			return nil, fmt.Errorf("failed to create .ssh directory: %w", err)
+		// Only create the main config file, not included files
+		if absPath == getMainConfigPath() {
+			// Ensure .ssh directory exists with proper permissions
+			if err := ensureSSHDirectory(); err != nil {
+				return nil, fmt.Errorf("failed to create .ssh directory: %w", err)
+			}
+
+			file, err := os.OpenFile(configPath, os.O_CREATE|os.O_WRONLY, 0600)
+			if err != nil {
+				return nil, fmt.Errorf("failed to create SSH config file: %w", err)
+			}
+			file.Close()
+
+			// Set secure permissions on the config file
+			if err := SetSecureFilePermissions(configPath); err != nil {
+				return nil, fmt.Errorf("failed to set secure permissions: %w", err)
+			}
 		}
 
-		file, err := os.OpenFile(configPath, os.O_CREATE|os.O_WRONLY, 0600)
-		if err != nil {
-			return nil, fmt.Errorf("failed to create SSH config file: %w", err)
-		}
-		file.Close()
-
-		// Set secure permissions on the config file
-		if err := SetSecureFilePermissions(configPath); err != nil {
-			return nil, fmt.Errorf("failed to set secure permissions: %w", err)
-		}
-
-		// File created, return empty host list
+		// File doesn't exist, return empty host list
 		return []SSHHost{}, nil
 	}
 
@@ -168,11 +188,25 @@ func ParseSSHConfigFile(configPath string) ([]SSHHost, error) {
 		value := strings.Join(parts[1:], " ")
 
 		switch key {
+		case "include":
+			// Handle Include directive
+			includeHosts, err := processIncludeDirective(value, configPath, processedFiles)
+			if err != nil {
+				// Don't fail the entire parse if include fails, just skip it
+				continue
+			}
+			hosts = append(hosts, includeHosts...)
 		case "host":
 			// New host, save previous one if it exists
 			if currentHost != nil {
 				hosts = append(hosts, *currentHost)
 			}
+			// Skip hosts with wildcards (*, ?) as they are typically patterns, not actual hosts
+			if strings.ContainsAny(value, "*?") {
+				currentHost = nil
+				pendingTags = nil
+				continue
+			}
 			// Create new host
 			currentHost = &SSHHost{
 				Name: value,
@@ -222,6 +256,55 @@ func ParseSSHConfigFile(configPath string) ([]SSHHost, error) {
 	return hosts, scanner.Err()
 }
 
+// processIncludeDirective processes an Include directive and returns hosts from included files
+func processIncludeDirective(pattern string, baseConfigPath string, processedFiles map[string]bool) ([]SSHHost, error) {
+	// Expand tilde to home directory
+	if strings.HasPrefix(pattern, "~") {
+		homeDir, err := os.UserHomeDir()
+		if err != nil {
+			return nil, fmt.Errorf("failed to get home directory: %w", err)
+		}
+		pattern = filepath.Join(homeDir, pattern[1:])
+	}
+
+	// If pattern is not absolute, make it relative to the base config directory
+	if !filepath.IsAbs(pattern) {
+		baseDir := filepath.Dir(baseConfigPath)
+		pattern = filepath.Join(baseDir, pattern)
+	}
+
+	// Use glob to find matching files
+	matches, err := filepath.Glob(pattern)
+	if err != nil {
+		return nil, fmt.Errorf("failed to glob pattern %s: %w", pattern, err)
+	}
+
+	var allHosts []SSHHost
+	for _, match := range matches {
+		// Skip directories
+		if info, err := os.Stat(match); err == nil && info.IsDir() {
+			continue
+		}
+
+		// Recursively parse the included file
+		hosts, err := parseSSHConfigFileWithProcessedFiles(match, processedFiles)
+		if err != nil {
+			// Skip files that can't be parsed rather than failing completely
+			continue
+		}
+		allHosts = append(allHosts, hosts...)
+	}
+
+	return allHosts, nil
+}
+
+// getMainConfigPath returns the main SSH config path for comparison
+func getMainConfigPath() string {
+	configPath, _ := GetDefaultSSHConfigPath()
+	absPath, _ := filepath.Abs(configPath)
+	return absPath
+}
+
 // AddSSHHost adds a new SSH host to the config file
 func AddSSHHost(host SSHHost) error {
 	configPath, err := GetDefaultSSHConfigPath()