internal override bool IsValidInput()

in src/BuildScriptGeneratorCli/Commands/BuildCommand.cs [297:363]
58 lines of code
12 McCabe index (conditional complexity)

        internal override bool IsValidInput(IServiceProvider serviceProvider, IConsole console)
        {
            var options = serviceProvider.GetRequiredService<IOptions<BuildScriptGeneratorOptions>>().Value;
            var logger = serviceProvider.GetRequiredService<ILogger<BuildCommand>>();

            if (_languageWasSet)
            {
                logger.LogWarning("Deprecated option '--language' used");
                console.WriteLine("Warning: the deprecated option '--language' was used.");
            }

            if (_languageVersionWasSet)
            {
                logger.LogWarning("Deprecated option '--language-version' used");
                console.WriteLine("Warning: the deprecated option '--language-version' was used.");
            }

            // Invalid to specify platform version without platform name
            if (string.IsNullOrEmpty(options.PlatformName) && !string.IsNullOrEmpty(options.PlatformVersion))
            {
                logger.LogError("Cannot use lang version without lang name");
                console.WriteErrorLine("Cannot use platform version without specifying platform name also.");
                return false;
            }

            if (!string.IsNullOrEmpty(options.AppType))
            {
                var appType = options.AppType.ToLower();
                if (!string.Equals(appType, Constants.FunctionApplications)
                    && !string.Equals(appType, Constants.StaticSiteApplications)
                    && !string.Equals(appType, Constants.WebApplications))
                {
                    logger.LogError($"Invalid value for AppType: '{options.AppType}'.");
                    console.WriteErrorLine(
                        $"Invalid value '{options.AppType}' for switch '--apptype'. " +
                        $"Valid values are '{Constants.StaticSiteApplications}' or " +
                        $"'{Constants.FunctionApplications}' or '{Constants.WebApplications}'");
                    return false;
                }
            }

            if (!string.IsNullOrEmpty(options.IntermediateDir))
            {
                if (DirectoryHelper.AreSameDirectories(options.IntermediateDir, options.SourceDir))
                {
                    logger.LogError(
                        "Intermediate directory cannot be same as the source directory.");
                    console.WriteErrorLine(
                        $"Intermediate directory '{options.IntermediateDir}' cannot be " +
                        $"same as the source directory '{options.SourceDir}'.");
                    return false;
                }

                // Intermediate directory cannot be a sub-directory of the source directory
                if (DirectoryHelper.IsSubDirectory(options.IntermediateDir, options.SourceDir))
                {
                    logger.LogError(
                        "Intermediate directory cannot be a child of the source directory.");
                    console.WriteErrorLine(
                        $"Intermediate directory '{options.IntermediateDir}' cannot be a " +
                        $"sub-directory of source directory '{options.SourceDir}'.");
                    return false;
                }
            }

            return true;
        }