Cli: use soluıtion's nuget.config & create it if it doesn't exist

framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/ProjectModification/PackagePreviewSwitcher.cs

@@ -44,11 +44,11 @@ namespace Volo.Abp.Cli.ProjectModification
 
         public async Task SwitchToNightlyPreview(CommandLineArgs commandLineArgs)
         {
-            _packageSourceManager.Add("ABP Nightly", "https://www.myget.org/F/abp-nightly/api/v3/index.json");
-
             var solutionPath = GetSolutionPath(commandLineArgs);
             var solutionFolder = GetSolutionFolder(commandLineArgs);
 
+            _packageSourceManager.Add(solutionFolder, "ABP Nightly", "https://www.myget.org/F/abp-nightly/api/v3/index.json");
+
             await _nugetPackagesVersionUpdater.UpdateSolutionAsync(
                 solutionPath,
                 true);
@@ -60,11 +60,11 @@ namespace Volo.Abp.Cli.ProjectModification
 
         public async Task SwitchToStable(CommandLineArgs commandLineArgs)
         {
-            _packageSourceManager.Remove("ABP Nightly");
-
             var solutionPath = GetSolutionPath(commandLineArgs);
             var solutionFolder = GetSolutionFolder(commandLineArgs);
 
+            _packageSourceManager.Remove(solutionFolder, "ABP Nightly");
+
             await _nugetPackagesVersionUpdater.UpdateSolutionAsync(
                 solutionPath,
                 false,

framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/ProjectModification/PackageSourceManager.cs

@@ -16,12 +16,21 @@ namespace Volo.Abp.Cli.ProjectModification
             Logger = NullLogger<PackageSourceManager>.Instance;
         }
 
-        public void Add(string sourceKey, string sourceValue)
+        public void Add(string solutionFolder, string sourceKey, string sourceValue)
         {
-            var nugetConfigPath = GetNugetConfigPath();
+            var nugetConfigPath = GetNugetConfigPath(solutionFolder);
+
+            Logger.LogInformation($"Adding \"{sourceValue}\" ({sourceKey}) to nuget sources...");
 
             if (!File.Exists(nugetConfigPath))
             {
+                File.WriteAllText(nugetConfigPath, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" +
+                              "<configuration>\n" +
+                              "    <packageSources>\n" +
+                              "        <add key=\"nuget.org\" value=\"https://api.nuget.org/v3/index.json\" />\n" +
+                              $"        <add key=\"{sourceKey}\" value=\"{sourceValue}\" />\n" +
+                              "    </packageSources>\n" +
+                              "</configuration>");
                 return;
             }
 
@@ -32,8 +41,6 @@ namespace Volo.Abp.Cli.ProjectModification
                 return;
             }
 
-            Logger.LogInformation($"Adding \"{sourceValue}\" ({sourceKey}) to nuget sources...");
-
             try
             {
                 var doc = new XmlDocument() { PreserveWhitespace = true };
@@ -62,9 +69,9 @@ namespace Volo.Abp.Cli.ProjectModification
             }
         }
 
-        public void Remove(string sourceKey)
+        public void Remove(string solutionFolder, string sourceKey)
         {
-            var nugetConfigPath = GetNugetConfigPath();
+            var nugetConfigPath = GetNugetConfigPath(solutionFolder);
 
             if (!File.Exists(nugetConfigPath))
             {
@@ -101,10 +108,9 @@ namespace Volo.Abp.Cli.ProjectModification
             }
         }
 
-        private static string GetNugetConfigPath()
+        private static string GetNugetConfigPath(string solutionFolder)
         {
-            return Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
-                "NuGet", "NuGet.Config");
+            return Path.Combine(solutionFolder, "NuGet.Config");
         }
 
         private static Stream GenerateStreamFromString(string s)