feat: added ability to pull from local file for source flags

Signed-off-by: Jason Salaber <jcsalaber@hotmail.com>

Author: jsalaber

cmd/pull.go

@@ -4,8 +4,10 @@ import (
 	"errors"
 	"fmt"
 	"strconv"
+	"strings"
 
 	"github.com/open-feature/cli/internal/config"
+	"github.com/open-feature/cli/internal/filesystem"
 	"github.com/open-feature/cli/internal/flagset"
 	"github.com/open-feature/cli/internal/manifest"
 	"github.com/open-feature/cli/internal/requests"
@@ -73,8 +75,28 @@ func GetPullCmd() *cobra.Command {
 				return fmt.Errorf("flagSourceUrl not set in config")
 			}
 
+			flags := flagset.Flagset{}
 			// fetch the flags from the remote source
-			flags, err := requests.FetchFlags(flagSourceUrl, authToken)
+			// Check if the URL is a local file path
+			if strings.HasPrefix(flagSourceUrl, "file://") {
+				localPath := strings.TrimPrefix(flagSourceUrl, "file://")
+				var data, err = filesystem.ReadFile(localPath)
+				if err != nil {
+					return fmt.Errorf("error reading local flags file: %w", err)
+				}
+				loadedFlags, err := flagset.LoadFromSourceFlags(data)
+				if err != nil {
+					return fmt.Errorf("error loading flags from local file: %w", err)
+				}
+				flags.Flags = *loadedFlags
+			} else if strings.HasPrefix(flagSourceUrl, "http://") && !strings.HasPrefix(flagSourceUrl, "https://") {
+				flags, err = requests.FetchFlags(flagSourceUrl, authToken)
+				if err != nil {
+					return fmt.Errorf("error reading local flags file: %w", err) 
+				}
+				return nil
+			}
+
 			if err != nil {
 				return fmt.Errorf("error fetching flags: %w", err)
 			}

internal/flagset/flagset.go

@@ -114,13 +114,16 @@ func LoadFromSourceFlags(data []byte) (*[]Flag, error) {
 		DefaultValue any `json:"defaultValue"`
 	}
 
-	var sourceFlags []SourceFlag
+	var sourceFlags struct {
+		Flags []SourceFlag `json:"flags"`
+	}
+
 	if err := json.Unmarshal(data, &sourceFlags); err != nil {
 		return nil, err
 	}
 
 	var flags []Flag
-	for _, sf := range sourceFlags {
+	for _, sf := range sourceFlags.Flags {
 		var flagType FlagType
 		switch sf.Type {
 		case "integer", "Integer":

sample/sample_source_flags.json

@@ -0,0 +1,34 @@
+{
+  "flags": [
+    {
+      "key": "flag1",
+      "type": "boolean",
+      "description": "A boolean flag",
+      "defaultValue": false
+    },
+    {
+      "key": "flag2",
+      "type": "string",
+      "description": "A string flag",
+      "defaultValue": "default"
+    },
+    {
+      "key": "flag3",
+      "type": "integer",
+      "description": "An integer flag",
+      "defaultValue": 0
+    },
+    {
+      "key": "flag4",
+      "type": "float",
+      "description": "A float flag",
+      "defaultValue": 0.0
+    },
+    {
+      "key": "flag5",
+      "type": "object",
+      "description": "An object flag",
+      "defaultValue": {}
+    }
+  ]
+}