fix(go): invalid major version suffix for submodules and jsii init

The major version suffix introduced in #2507 was added at the end of the full module name, but for submodules, the suffix is needed only after the root package name.

Additionally, the `_init_` import failed to include the major version suffix as well.

In order to cover these cases in tests, change the version of `jsii-calc` to `3.20.1` so that it will be a MV larger then 2.0.

Fixes #2507

packages/jsii-calc/package.json

@@ -1,6 +1,6 @@
 {
   "name": "jsii-calc",
-  "version": "0.0.0",
+  "version": "3.20.120",
   "private": true,
   "description": "A simple calcuator built on JSII.",
   "stability": "stable",

packages/jsii-pacmak/lib/targets/go/package.ts

@@ -79,9 +79,9 @@ export abstract class Package {
     const moduleName = this.root.moduleName;
     const prefix = moduleName !== '' ? `${moduleName}/` : '';
     const rootPackageName = this.root.packageName;
-    const suffix = this.filePath !== '' ? `/${this.filePath}` : ``;
     const versionSuffix = determineMajorVersionSuffix(this.version);
-    return `${prefix}${rootPackageName}${suffix}${versionSuffix}`;
+    const suffix = this.filePath !== '' ? `/${this.filePath}` : ``;
+    return `${prefix}${rootPackageName}${versionSuffix}${suffix}`;
   }
 
   /*
@@ -150,7 +150,7 @@ export abstract class Package {
 
     if (this.usesInitPackage) {
       code.line(
-        `${JSII_INIT_ALIAS} "${this.root.moduleName}/${this.root.packageName}/${JSII_INIT_PACKAGE}"`,
+        `${JSII_INIT_ALIAS} "${this.root.goModuleName}/${JSII_INIT_PACKAGE}"`,
       );
     }
 

scripts/align-version.js

@@ -6,12 +6,16 @@ const fs = require('fs');
 
 const marker = require('./get-version-marker');
 const repoVersion = require('./get-version');
+const exclude = [
+  '@fixtures/jsii-calc-bundled',
+  'jsii-calc', // tests major version >2 for go
+];
 
 for (const file of process.argv.splice(2)) {
   const pkg = JSON.parse(fs.readFileSync(file).toString());
 
   // Ignore fixture packages
-  if (pkg.name === '@fixtures/jsii-calc-bundled') {
+  if (exclude.includes(pkg.name)) {
     continue;
   }