feat: add centralized version management (#14)

## Summary
- Added `openiap-versions.json` for centralized version tracking
- Created version management system that reads from JSON file
- Enables easy version updates across the SDK

## Changes
- Add `openiap-versions.json` with current versions (apple: 1.2.3, gql:
1.0.9)
- Create `OpenIapVersion.swift` to read versions at runtime
- Update Package.swift to include version file as resource
- Expose version info through `OpenIapVersionInfo` enum

## Usage
```swift
// Get current SDK version
let sdkVersion = OpenIapVersionInfo.sdkVersion // "1.2.3"

// Get GraphQL reference version
let gqlVersion = OpenIapVersionInfo.gqlVersion // "1.0.9"
```

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

---------

Co-authored-by: Claude <noreply@anthropic.com>

Author: hyochan

.github/workflows/deploy-swift.yml

@@ -36,6 +36,12 @@ jobs:
           git config user.name "hyodotdev"
           git config user.email "hyo@hyo.dev"
 
+      - name: Install jq (for JSON processing)
+        run: |
+          if ! command -v jq &> /dev/null; then
+            brew install jq
+          fi
+
       - name: Bump version and tag
         run: |
           ./scripts/bump-version.sh "${{ env.VERSION }}"

Package.swift

@@ -20,7 +20,10 @@ let package = Package(
         .target(
             name: "OpenIAP",
             dependencies: [],
-            path: "Sources"),
+            path: "Sources",
+            resources: [
+                .copy("openiap-versions.json")
+            ]),
         .testTarget(
             name: "OpenIapTests",
             dependencies: ["OpenIAP"],

Sources/OpenIapVersion.swift

@@ -0,0 +1,59 @@
+import Foundation
+
+/// OpenIAP version management
+public struct OpenIapVersion {
+    /// Current OpenIAP Apple SDK version
+    public static let current: String = {
+        // Try to load version from openiap-versions.json
+        if let version = loadVersionFromJSON() {
+            return version
+        }
+        // Fallback to hardcoded version
+        return "1.2.3"
+    }()
+
+    /// OpenIAP GraphQL version for reference
+    public static let gqlVersion: String = {
+        // Try to load GQL version from openiap-versions.json
+        if let version = loadGQLVersionFromJSON() {
+            return version
+        }
+        // Fallback to hardcoded version
+        return "1.0.9"
+    }()
+
+    private static func loadVersionFromJSON() -> String? {
+        guard let url = Bundle.module.url(forResource: "openiap-versions", withExtension: "json"),
+              let data = try? Data(contentsOf: url),
+              let json = try? JSONSerialization.jsonObject(with: data) as? [String: Any],
+              let version = json["apple"] as? String else {
+            return nil
+        }
+        return version
+    }
+
+    private static func loadGQLVersionFromJSON() -> String? {
+        guard let url = Bundle.module.url(forResource: "openiap-versions", withExtension: "json"),
+              let data = try? Data(contentsOf: url),
+              let json = try? JSONSerialization.jsonObject(with: data) as? [String: Any],
+              let version = json["gql"] as? String else {
+            return nil
+        }
+        return version
+    }
+}
+
+// MARK: - Version Info
+
+/// Namespace for OpenIAP version information
+public enum OpenIapVersionInfo {
+    /// Current OpenIAP Apple SDK version
+    public static var sdkVersion: String {
+        OpenIapVersion.current
+    }
+
+    /// OpenIAP GraphQL version for reference
+    public static var gqlVersion: String {
+        OpenIapVersion.gqlVersion
+    }
+}

Sources/openiap-versions.json

@@ -0,0 +1,4 @@
+{
+  "apple": "1.2.3",
+  "gql": "1.0.9"
+}

scripts/bump-version.sh

@@ -41,6 +41,20 @@ echo "New version: $NEW_VERSION"
 # Update VERSION file
 echo "$NEW_VERSION" > VERSION
 
+# Update openiap-versions.json
+if [ -f "Sources/openiap-versions.json" ]; then
+    # Use a temporary file to update JSON
+    jq --arg version "$NEW_VERSION" '.apple = $version' Sources/openiap-versions.json > Sources/openiap-versions.json.tmp && \
+    mv Sources/openiap-versions.json.tmp Sources/openiap-versions.json
+    echo "✅ Updated openiap-versions.json"
+fi
+
+# Update OpenIapVersion.swift fallback version
+if [ -f "Sources/OpenIapVersion.swift" ]; then
+    sed -i '' "s/return \"[0-9.]*\"/return \"$NEW_VERSION\"/" Sources/OpenIapVersion.swift
+    echo "✅ Updated OpenIapVersion.swift fallback"
+fi
+
 # Update openiap.podspec
 sed -i '' "s/s.version.*=.*'.*'/s.version          = '$NEW_VERSION'/" openiap.podspec
 
@@ -51,7 +65,7 @@ sed -i '' "s/pod 'openiap', '~> [0-9.]*'/pod 'openiap', '~> $NEW_VERSION'/" READ
 sed -i '' "s/.package(url: \"https:\/\/github.com\/hyodotdev\/openiap-apple.git\", from: \"[0-9.]*\")/.package(url: \"https:\/\/github.com\/hyodotdev\/openiap-apple.git\", from: \"$NEW_VERSION\")/" README.md
 
 # Commit changes
-git add VERSION openiap.podspec README.md
+git add VERSION openiap.podspec README.md Sources/openiap-versions.json Sources/OpenIapVersion.swift
 git commit -m "Bump version to $NEW_VERSION"
 
 # Push commits