Add a Wpup_Version::VERSION constant and a workflow for automatically…

… updating it.

Prompted by #129. Workflow needs testing.

.github/workflows/version.yml

@@ -0,0 +1,29 @@
+name: Version File Management
+on:
+  release:
+    types: [published]
+
+jobs:
+  update-version:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Update Version File
+        run: |
+          VERSION=${GITHUB_REF#refs/tags/v}
+          echo "<?php
+          class Wpup_Version {
+              public const VERSION = '$VERSION';
+          }" > includes/Version.php
+
+      - name: Commit Version Update
+        run: |
+          git config --local user.email "github-actions[bot]@users.noreply.github.com"
+          git config --local user.name "github-actions[bot]"
+          git add includes/Version.php
+          git commit -m "chore: Update version to ${GITHUB_REF#refs/tags/v}"
+          git push

includes/Version.php

@@ -0,0 +1,4 @@
+<?php
+class Wpup_Version {
+	const VERSION = '2.0.1';
+}

loader.php

@@ -1,4 +1,5 @@
 <?php
+require_once __DIR__ . '/includes/Version.php';
 require_once __DIR__ . '/includes/Wpup/Package.php';
 require_once __DIR__ . '/includes/Wpup/ZipMetadataParser.php';
 require_once __DIR__ . '/includes/Wpup/InvalidPackageException.php';