private string BuildScriptFromSnippets()

in src/BuildScriptGenerator/DefaultBuildScriptGenerator.cs [263:362]
86 lines of code
5 McCabe index (conditional complexity)

        private string BuildScriptFromSnippets(
            BuildScriptGeneratorContext context,
            string installationScript,
            IList<BuildScriptSnippet> buildScriptSnippets,
            IDictionary<string, string> toolsToVersion,
            List<string> directoriesToExcludeFromCopyToIntermediateDir,
            List<string> directoriesToExcludeFromCopyToBuildOutputDir,
            IEnumerable<PlatformDetectorResult> detectionResults)
        {
            string script;
            string benvArgs = StringExtensions.JoinKeyValuePairs(toolsToVersion);
            benvArgs = $"{benvArgs} {Constants.BenvDynamicInstallRootDirKey}=\"{_cliOptions.DynamicInstallRootDir}\"";

            Dictionary<string, string> buildProperties = buildScriptSnippets
                .Where(s => s.BuildProperties != null)
                .SelectMany(s => s.BuildProperties)
                .ToDictionary(p => p.Key, p => p.Value);
            buildProperties[ManifestFilePropertyKeys.OperationId] = context.OperationId;

            var sourceDirInBuildContainer = _cliOptions.SourceDir;
            if (!string.IsNullOrEmpty(_cliOptions.IntermediateDir))
            {
                sourceDirInBuildContainer = _cliOptions.IntermediateDir;
            }

            buildProperties[ManifestFilePropertyKeys.SourceDirectoryInBuildContainer] = sourceDirInBuildContainer;

            var allPlatformNames = detectionResults
                .Where(s => s.Platform != null)
                .Select(s => s.Platform)
                .ToList();

            foreach (var eachPlatformName in allPlatformNames)
            {
                _logger.LogInformation($"Build Property Key:{ManifestFilePropertyKeys.PlatformName} value: {eachPlatformName} is written into manifest");
                if (buildProperties.ContainsKey(ManifestFilePropertyKeys.PlatformName))
                {
                    var previousValue = buildProperties[ManifestFilePropertyKeys.PlatformName];
                    buildProperties[ManifestFilePropertyKeys.PlatformName]
                    = string.Join(
                        ",",
                        previousValue,
                        eachPlatformName);
                }
                else
                {
                    buildProperties[ManifestFilePropertyKeys.PlatformName] = eachPlatformName;
                }
            }

            buildProperties[ManifestFilePropertyKeys.CompressDestinationDir] =
                _cliOptions.CompressDestinationDir.ToString().ToLower();

            (var preBuildCommand, var postBuildCommand) = PreAndPostBuildCommandHelper.GetPreAndPostBuildCommands(
                context.SourceRepo,
                _cliOptions);

            var outputIsSubDirOfSourceDir = false;
            if (!string.IsNullOrEmpty(_cliOptions.DestinationDir))
            {
                outputIsSubDirOfSourceDir = DirectoryHelper.IsSubDirectory(
                    _cliOptions.DestinationDir,
                    _cliOptions.SourceDir);
            }

            // Copy the source content to destination only if all the platforms involved in generating the build script
            // say yes.
            var copySourceDirectoryContentToDestinationDirectory = buildScriptSnippets.All(
                snippet => snippet.CopySourceDirectoryContentToDestinationDirectory);

            var buildScriptProps = new BaseBashBuildScriptProperties()
            {
                OsPackagesToInstall = _cliOptions.RequiredOsPackages ?? new string[0],
                BuildScriptSnippets = buildScriptSnippets.Select(s => s.BashBuildScriptSnippet),
                BenvArgs = benvArgs,
                PreBuildCommand = preBuildCommand,
                PostBuildCommand = postBuildCommand,
                DirectoriesToExcludeFromCopyToIntermediateDir = directoriesToExcludeFromCopyToIntermediateDir,
                DirectoriesToExcludeFromCopyToBuildOutputDir = directoriesToExcludeFromCopyToBuildOutputDir,
                ManifestFileName = FilePaths.BuildManifestFileName,
                ManifestDir = context.ManifestDir,
                BuildCommandsFileName = context.BuildCommandsFileName,
                BuildProperties = buildProperties,
                BenvPath = FilePaths.Benv,
                LoggerPath = FilePaths.Logger,
                PlatformInstallationScript = installationScript,
                OutputDirectoryIsNested = outputIsSubDirOfSourceDir,
                CopySourceDirectoryContentToDestinationDirectory = copySourceDirectoryContentToDestinationDirectory,
                CompressDestinationDir = _cliOptions.CompressDestinationDir,
            };

            LogScriptIfGiven("pre-build", buildScriptProps.PreBuildCommand);
            LogScriptIfGiven("post-build", buildScriptProps.PostBuildCommand);

            script = TemplateHelper.Render(
                TemplateHelper.TemplateResource.BaseBashScript,
                buildScriptProps,
                _logger);
            return script;
        }