chore(release): add rc prerelease flow

scripts/emit-release-env.mjs

@@ -0,0 +1,49 @@
+import { getReleaseInfoFromSourceTag } from "./release-version-utils.mjs";
+
+function usageAndExit(code = 1) {
+  process.stderr.write(`Usage: node scripts/emit-release-env.mjs --source-tag <tag>\n`);
+  process.exit(code);
+}
+
+function parseArgs(argv) {
+  let sourceTag = "";
+
+  for (let index = 0; index < argv.length; index += 1) {
+    const arg = argv[index];
+    if (arg === "--source-tag") {
+      sourceTag = argv[index + 1] ?? "";
+      index += 1;
+      continue;
+    }
+    if (arg === "--help" || arg === "-h") {
+      usageAndExit(0);
+    }
+    usageAndExit();
+  }
+
+  if (!sourceTag) {
+    usageAndExit();
+  }
+
+  return sourceTag;
+}
+
+const sourceTag = parseArgs(process.argv.slice(2));
+const info = getReleaseInfoFromSourceTag(sourceTag);
+
+const entries = [
+  ["SOURCE_TAG", info.sourceTag],
+  ["RELEASE_TAG", info.releaseTag],
+  ["RELEASE_VERSION", info.version],
+  ["RELEASE_BASE_VERSION", info.baseVersion],
+  ["RELEASE_PRERELEASE", info.prerelease ?? ""],
+  ["IS_PRERELEASE", info.isPrerelease ? "true" : "false"],
+  ["IS_RELEASE_CANDIDATE", info.isReleaseCandidate ? "true" : "false"],
+  ["RELEASE_TYPE", info.releaseType],
+  ["DESKTOP_VERSION", info.version],
+  ["IS_SMOKE_TAG", info.isSmokeTag ? "true" : "false"],
+];
+
+for (const [key, value] of entries) {
+  process.stdout.write(`${key}=${value}\n`);
+}