public static async Task IsCompatibleAsync()

in src/PortingAssistant.Client.Analysis/Utils/PackageCompatibility.cs [47:135]
82 lines of code
13 McCabe index (conditional complexity)

        public static async Task<CompatibilityResult> IsCompatibleAsync(Task<PackageDetails> packageDetails, PackageVersionPair packageVersionPair, ILogger _logger, string target = "netcoreapp3.1")
        {
            if (packageDetails == null || packageVersionPair == null)
            {
                return new CompatibilityResult
                {
                    Compatibility = Compatibility.UNKNOWN,
                    CompatibleVersions = new List<string>()
                };
            }

            try
            {
                await packageDetails;
                if (!packageDetails.IsCompletedSuccessfully)
                {
                    return new CompatibilityResult
                    {
                        Compatibility = Compatibility.UNKNOWN,
                        CompatibleVersions = new List<string>()
                    };
                }

                var compatibleVersionsForTargetFramework = packageDetails.Result.Targets.GetValueOrDefault(target, null);
                if (compatibleVersionsForTargetFramework == null)
                {
                    return new CompatibilityResult
                    {
                        Compatibility = Compatibility.INCOMPATIBLE,
                        CompatibleVersions = new List<string>()
                    };
                }

                if (!NuGetVersion.TryParse(packageVersionPair.Version, out var version))
                {
                    return new CompatibilityResult
                    {
                        Compatibility = Compatibility.UNKNOWN,
                        CompatibleVersions = new List<string>()
                    };
                }
                
                var compatibleVersionsToRecommend = version.FindGreaterCompatibleVersions(compatibleVersionsForTargetFramework).ToList();
                compatibleVersionsToRecommend.Sort( (a, b) => NuGetVersion.Parse(a).CompareTo(NuGetVersion.Parse(b)));

                Compatibility compatibility;
                var maxCompatibleVersion = NugetVersionHelper.GetMaxVersion(compatibleVersionsForTargetFramework);
                if (maxCompatibleVersion != null
                    && !maxCompatibleVersion.IsZeroVersion()
                    && version.IsGreaterThan(maxCompatibleVersion))
                {
                    compatibility = version.HasSameMajorAs(maxCompatibleVersion)
                        ? Compatibility.COMPATIBLE
                        : Compatibility.INCOMPATIBLE;
                }
                else
                {
                    compatibility = version.HasLowerOrEqualCompatibleVersion(compatibleVersionsForTargetFramework)
                        ? Compatibility.COMPATIBLE
                        : Compatibility.INCOMPATIBLE;
                }

                return new CompatibilityResult
                {
                    Compatibility = compatibility,
                    CompatibleVersions = compatibleVersionsToRecommend
                };
            }
            catch (OutOfMemoryException e)
            {
                _logger.LogError("parse package version {0} {1} with error {2}", packageVersionPair.PackageId, packageVersionPair.Version, e);
                MemoryUtils.LogMemoryConsumption(_logger);
                return new CompatibilityResult
                {
                    Compatibility = Compatibility.UNKNOWN,
                    CompatibleVersions = new List<string>()
                };
            }
            catch (Exception e)
            {
                _logger.LogError("parse package version {0} {1} with error {2}", packageVersionPair.PackageId, packageVersionPair.Version, e);
                return new CompatibilityResult
                {
                    Compatibility = Compatibility.UNKNOWN,
                    CompatibleVersions = new List<string>()
                };
            }

        }