chore: Major release tag workflow

.github/workflows/update main version tag.yml

@@ -0,0 +1,30 @@
+# ~~ Generated by projen. To modify, edit .projenrc.ts and run "npx projen".
+
+name: Update Main Version Tag
+on:
+  workflow_dispatch:
+    inputs:
+      target:
+        description: The target tag to update the main tag to
+        required: true
+      main_version:
+        type: choice
+        description: The main version to update
+        options:
+          - v2
+jobs:
+  tag:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Git config
+        run: git config user.name github-actions && git config user.email [email protected]
+      - name: Tag New Target
+        run: git tag -f ${{ github.event.inputs.major_version }} ${{ github.event.inputs.target }}
+      - name: Push Tag
+        run: git push origin ${{ github.event.inputs.major_version }} --force

.projenrc.ts

@@ -1,3 +1,4 @@
+import { JobPermission } from "projen/lib/github/workflows-model";
 import { NodePackageManager } from "projen/lib/javascript";
 import {
   GitHubActionTypeScriptProject,
@@ -55,4 +56,53 @@ const project = new GitHubActionTypeScriptProject({
   },
 });
 
+const mainVersionTagWorkflow = project.github?.addWorkflow(
+  "Update Main Version Tag",
+);
+if (mainVersionTagWorkflow) {
+  mainVersionTagWorkflow.on({
+    workflowDispatch: {
+      inputs: {
+        target: {
+          description: "The target tag to update the main tag to",
+          required: true,
+        },
+        mainVersion: {
+          type: "choice",
+          description: "The main version to update",
+          options: ["v2"],
+        },
+      },
+    },
+  });
+
+  mainVersionTagWorkflow.addJob("tag", {
+    runsOn: ["ubuntu-latest"],
+    permissions: {
+      contents: JobPermission.READ,
+    },
+    steps: [
+      {
+        name: "Checkout",
+        uses: "actions/checkout@v2",
+        with: {
+          "fetch-depth": 0,
+        },
+      },
+      {
+        name: "Git config",
+        run: "git config user.name github-actions && git config user.email [email protected]",
+      },
+      {
+        name: "Tag New Target",
+        run: "git tag -f ${{ github.event.inputs.major_version }} ${{ github.event.inputs.target }}",
+      },
+      {
+        name: "Push Tag",
+        run: "git push origin ${{ github.event.inputs.major_version }} --force",
+      },
+    ],
+  });
+}
+
 project.synth();