Automatic version number on GitHub release (#507)

Add script that updates versions and commits changes

.github/workflows/createRelease.yml

@@ -0,0 +1,20 @@
+# This workflow will build a Swift project
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-swift
+
+name: Create release
+
+on:
+  release:
+    types: [created]
+
+jobs:
+  release:
+    runs-on: macos-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Get the tag version
+      id: tag_version
+      run: echo ::set-output name=VERSION::${GITHUB_REF/refs\/tags\//}
+    - name: Update version
+      run: sh Scripts/updateVersion.sh $GITHUB_TOKEN ${{ steps.tag_version.outputs.VERSION }}

Scripts/updateVersion.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+# This script expects two inputs
+# $1 - The github token for opentelemetry-swift
+# $2 - the git tag
+
+#Update version number
+sed -E -i '' 's/public static let OTEL_SWIFT_SDK_VERSION = ".+"/public static let OTEL_SWIFT_SDK_VERSION = "'$2\"/ ./Sources/OpenTelemetrySdk/Version.swift
+git commit -m "Updated version number to $2"
+git tag -f $2
+git push -f --tags origin HEAD:main

Sources/OpenTelemetrySdk/Version.swift

@@ -6,5 +6,5 @@
 import Foundation
 
 extension Resource {
-    public static let OTEL_SWIFT_SDK_VERSION : String = "1.8.0"
+public static let OTEL_SWIFT_SDK_VERSION = "1.8.0"
 }