private JObject GetTargetOrAttemptFallback()

in src/Microsoft.NuGet.Build.Tasks/ResolveNuGetPackageAssets.cs [659:720]
49 lines of code
10 McCabe index (conditional complexity)

        private JObject GetTargetOrAttemptFallback(JObject lockFile, bool needsRuntimeIdentifier)
        {
            var targets = (JObject)lockFile["targets"];

            foreach (var preferredTargetMoniker in TargetMonikers)
            {
                var preferredTargetMonikerWithOptionalRuntimeIdentifier = GetTargetMonikerWithOptionalRuntimeIdentifier(preferredTargetMoniker, needsRuntimeIdentifier);
                var target = (JObject)targets[preferredTargetMonikerWithOptionalRuntimeIdentifier];

                if (target != null)
                {
                    return target;
                }
            }

            // If we need a runtime identifier, let's see if we have the framework targeted. If we do,
            // then we can give a better error message.
            bool onlyNeedsRuntimeInProjectJson = false;
            if (needsRuntimeIdentifier)
            {
                foreach (var targetMoniker in TargetMonikers)
                {
                    var targetMonikerWithoutRuntimeIdentifier = GetTargetMonikerWithOptionalRuntimeIdentifier(targetMoniker, needsRuntimeIdentifier: false);
                    if (targets[targetMonikerWithoutRuntimeIdentifier] != null)
                    {
                        // We do have a TXM being targeted, so we just are missing the runtime
                        onlyNeedsRuntimeInProjectJson = true;
                        break;
                    }
                }
            }

            if (onlyNeedsRuntimeInProjectJson)
            {
                GiveErrorForMissingRuntimeIdentifier();
            }
            else
            {
                GiveErrorForMissingFramework();
            }

            // If we're still here, that means we're allowing fallback, so let's try
            foreach (var fallback in TargetMonikers)
            {
                var target = (JObject)targets[GetTargetMonikerWithOptionalRuntimeIdentifier(fallback, needsRuntimeIdentifier: false)];

                if (target != null)
                {
                    return target;
                }
            }

            // Anything goes
            var enumerableTargets = targets.Cast<KeyValuePair<string, JToken>>();
            var firstTarget = (JObject)enumerableTargets.FirstOrDefault().Value;
            if (firstTarget == null)
            {
                GiveErrorForNoTargets();
            }

            return firstTarget;
        }