Refactor command argument building and parsing

pkg/backends/vllm/parser.go

@@ -12,22 +12,20 @@ import (
 // 4. Args only: "--model MODEL_NAME --other-args"
 // 5. Multiline commands with backslashes
 func ParseVllmCommand(command string) (*VllmServerOptions, error) {
-	config := backends.CommandParserConfig{
-		ExecutableNames: []string{"vllm"},
-		SubcommandNames: []string{"serve"},
-		MultiValuedFlags: map[string]struct{}{
-			"middleware":      {},
-			"api_key":         {},
-			"allowed_origins": {},
-			"allowed_methods": {},
-			"allowed_headers": {},
-			"lora_modules":    {},
-			"prompt_adapters": {},
-		},
+	executableNames := []string{"vllm"}
+	subcommandNames := []string{"serve"}
+	multiValuedFlags := map[string]bool{
+		"middleware":      true,
+		"api_key":         true,
+		"allowed_origins": true,
+		"allowed_methods": true,
+		"allowed_headers": true,
+		"lora_modules":    true,
+		"prompt_adapters": true,
 	}
 
 	var vllmOptions VllmServerOptions
-	if err := backends.ParseCommand(command, config, &vllmOptions); err != nil {
+	if err := backends.ParseCommand(command, executableNames, subcommandNames, multiValuedFlags, &vllmOptions); err != nil {
 		return nil, err
 	}
 

pkg/backends/vllm/vllm.go

@@ -130,18 +130,15 @@ type VllmServerOptions struct {
 	OverrideKVCacheALIGNSize  int    `json:"override_kv_cache_align_size,omitempty"`
 }
 
-// BuildCommandArgs converts VllmServerOptions to command line arguments using the common builder
+// BuildCommandArgs converts VllmServerOptions to command line arguments
 // Note: This does NOT include the "serve" subcommand, that's handled at the instance level
 func (o *VllmServerOptions) BuildCommandArgs() []string {
-	config := backends.ArgsBuilderConfig{
-		SliceHandling: backends.SliceAsMixed,
-		MultipleFlags: map[string]struct{}{
-			"api-key":         {},
-			"allowed-origins": {},
-			"allowed-methods": {},
-			"allowed-headers": {},
-			"middleware":      {},
-		},
+	multipleFlags := map[string]bool{
+		"api-key":         true,
+		"allowed-origins": true,
+		"allowed-methods": true,
+		"allowed-headers": true,
+		"middleware":      true,
 	}
-	return backends.BuildCommandArgs(o, config)
+	return backends.BuildCommandArgs(o, multipleFlags)
 }