refactor (NuGettier.Upm): add more detailed trace-logs (refactor/expand-trace-logs) [#227]

- **refactor (NuGettier.Upm): add more trace-logs to Upm.Context.FetchPackage()**
- **refactor (NuGettier.Upm): log when package could not be found for a given resource in Upm.Context.FetchPackage()**
- **refactor (NuGettier.Upm): add more trace-logs to Upm.Context.GetPackageInformation()**

Author: KageKirin

NuGettier.Core/Context/FetchPackage.cs

@@ -28,12 +28,15 @@ CancellationToken cancellationToken
     )
     {
         using var scope = Logger.TraceLocation().BeginScope(this.__METHOD__());
+        Logger.LogTrace("fetching {0} (prerelease: {1})", packageIdVersion, preRelease);
         using var nugetLogger = NuGetLogger.Create(LoggerFactory);
 
         packageIdVersion.SplitPackageIdVersion(out var packageId, out var version, out var latest);
         IEnumerable<FindPackageByIdResource> resources = await Repositories.GetResourceAsync<FindPackageByIdResource>(
             cancellationToken
         );
+        Logger.LogTrace("trying to get '{0}' version {1} (latest: {2})", packageId, version, latest);
+
         IEnumerable<NuGetVersion> versions = (
             await resources.GetAllVersionsAsync(packageId, Cache, nugetLogger, cancellationToken)
         ).Distinct();
@@ -43,11 +46,13 @@ await resources.GetAllVersionsAsync(packageId, Cache, nugetLogger, cancellationT
         {
             Logger.LogTrace("fetching latest version for {0}", packageId);
             packageVersion = versions.Last();
+            Logger.LogTrace("latest version is {0}", packageVersion);
         }
         else if (version != null)
         {
             Logger.LogTrace("fetching version {1} for {0}", packageId, version);
             packageVersion = new NuGetVersion(version);
+            Logger.LogTrace("required version is {0}", packageVersion);
         }
         Logger.LogDebug("fetching {0}@{1}", packageId, packageVersion);
 
@@ -85,6 +90,10 @@ await resource.CopyNupkgToStreamAsync(
 
                     return packageStream;
                 }
+                else
+                {
+                    Logger.LogDebug("package {0}@{1} does not exist on {2}", packageId, packageVersion, resource);
+                }
             }
         }
 

NuGettier.Upm/Context/GetPackageInformation.cs

@@ -29,6 +29,8 @@ CancellationToken cancellationToken
     )
     {
         using var scope = Logger.TraceLocation().BeginScope(this.__METHOD__());
+        Logger.LogTrace("getting package information for {0} (prerelease: {1})", packageIdVersion, preRelease);
+
         packageIdVersion.SplitPackageIdVersion(out var packageId, out var version, out var latest);
         var packageSearchMetadata = await base.GetPackageInformation(
             packageIdVersion: packageIdVersion,