Eliminate hard dependency on version resolver in installer

src/installer.ts

@@ -274,18 +274,11 @@ export class DotnetCoreInstaller {
   }
 
   constructor(
-    private version: string,
+    private dotnetVersion: DotnetVersion,
     private quality: QualityOptions,
-    private preferInstalled = false
   ) {}
 
   public async installDotnet(): Promise<string | null> {
-    const versionResolver = new DotnetVersionResolver(
-      this.version,
-      this.preferInstalled
-    );
-    const dotnetVersion = await versionResolver.createDotnetVersion();
-
     /**
      * Install dotnet runitme first in order to get
      * the latest stable version of dotnet CLI
@@ -321,7 +314,7 @@ export class DotnetCoreInstaller {
         IS_WINDOWS ? '-SkipNonVersionedFiles' : '--skip-non-versioned-files'
       )
       // Use version provided by user
-      .useVersion(dotnetVersion, this.quality)
+      .useVersion(this.dotnetVersion, this.quality)
       .execute();
 
     if (dotnetInstallOutput.exitCode) {

src/setup-dotnet.ts

@@ -1,5 +1,5 @@
 import * as core from '@actions/core';
-import {DotnetCoreInstaller, DotnetInstallDir} from './installer';
+import {DotnetCoreInstaller, DotnetInstallDir, DotnetVersionResolver} from './installer';
 import * as fs from 'fs';
 import path from 'path';
 import semver from 'semver';
@@ -68,12 +68,14 @@ export async function run() {
       }
 
       let dotnetInstaller: DotnetCoreInstaller;
+      let dotnetVersionResolver: DotnetVersionResolver;
+
       const uniqueVersions = new Set<string>(versions);
       for (const version of uniqueVersions) {
+        dotnetVersionResolver = new DotnetVersionResolver(version, preferInstalled);
         dotnetInstaller = new DotnetCoreInstaller(
-          version,
+          await dotnetVersionResolver.createDotnetVersion(),
           quality,
-          preferInstalled
         );
         const installedVersion = await dotnetInstaller.installDotnet();
         installedDotnetVersions.push(installedVersion);