Extract CI scripts in separate files

.github/scripts/commit-and-tag.cjs

@@ -0,0 +1,71 @@
+// Copyright 2025 New Vector Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only
+// Please see LICENSE in the repository root for full details.
+
+// @ts-check
+
+/** @param {import('@actions/github-script').AsyncFunctionArguments} AsyncFunctionArguments */
+module.exports = async ({ github, context }) => {
+  const fs = require("node:fs/promises");
+  const { owner, repo } = context.repo;
+  const version = process.env.VERSION;
+  const parent = context.sha;
+  if (!version) throw new Error("VERSION is not defined");
+
+  const files = [
+    "Cargo.toml",
+    "Cargo.lock",
+    "tools/syn2mas/package.json",
+    "tools/syn2mas/package-lock.json",
+  ];
+
+  /** @type {{path: string, mode: "100644", type: "blob", sha: string}[]} */
+  const tree = [];
+  for (const file of files) {
+    const content = await fs.readFile(file);
+    const blob = await github.rest.git.createBlob({
+      owner,
+      repo,
+      content: content.toString("base64"),
+      encoding: "base64",
+    });
+    console.log(`Created blob for ${file}:`, blob.data.url);
+
+    tree.push({
+      path: file,
+      mode: "100644",
+      type: "blob",
+      sha: blob.data.sha,
+    });
+  }
+
+  const treeObject = await github.rest.git.createTree({
+    owner,
+    repo,
+    tree,
+    base_tree: parent,
+  });
+  console.log("Created tree:", treeObject.data.url);
+
+  const commit = await github.rest.git.createCommit({
+    owner,
+    repo,
+    message: version,
+    parents: [parent],
+    tree: treeObject.data.sha,
+  });
+  console.log("Created commit:", commit.data.url);
+
+  const tag = await github.rest.git.createTag({
+    owner,
+    repo,
+    tag: `v${version}`,
+    message: version,
+    type: "commit",
+    object: commit.data.sha,
+  });
+  console.log("Created tag:", tag.data.url);
+
+  return { commit: commit.data.sha, tag: tag.data.sha };
+};