Method dynamicRenderer

coderd/dynamicparameters/render.go:170–213

Renderer caches all the necessary files when rendering a template version's parameters. It must be closed after use to release the cached files.

(ctx context.Context, db database.Store, cache *files.CacheCloser)

// Renderer caches all the necessary files when rendering a template version's
// parameters. It must be closed after use to release the cached files.
func (r *loader) dynamicRenderer(ctx context.Context, db database.Store, cache *files.CacheCloser) (*dynamicRenderer, error) {
	closeFiles := true // If the function returns with no error, this will toggle to false.
	defer func() {
		if closeFiles {
			cache.Close()
		}
	}()

	tfVarValues, err := VariableValues(*r.templateVariableValues)
	if err != nil {
		return nil, xerrors.Errorf("parse variable values: %w", err)
	}

	// If they can read the template version, then they can read the file for
	// parameter loading purposes.
	//nolint:gocritic
	fileCtx := dbauthz.AsFileReader(ctx)

	var templateFS fs.FS

	templateFS, err = cache.Acquire(fileCtx, db, r.job.FileID)
	if err != nil {
		return nil, xerrors.Errorf("acquire template file: %w", err)
	}

	var moduleFilesFS *files.CloseFS
	if r.terraformValues.CachedModuleFiles.Valid {
		moduleFilesFS, err = cache.Acquire(fileCtx, db, r.terraformValues.CachedModuleFiles.UUID)
		if err != nil {
			return nil, xerrors.Errorf("acquire module files: %w", err)
		}
		templateFS = files.NewOverlayFS(templateFS, []files.Overlay{{Path: ".terraform/modules", FS: moduleFilesFS}})
	}

	closeFiles = false // Caller will have to call close
	return &dynamicRenderer{
		data:        r,
		templateFS:  templateFS,
		db:          db,
		ownerErrors: make(map[uuid.UUID]error),
		close:       cache.Close,
		tfvarValues: tfVarValues,
	}, nil
}

type dynamicRenderer struct {
	db         database.Store