| // Copyright 2021 The LUCI Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| // +build go1.16 |
| |
| package interpreter |
| |
| import ( |
| "errors" |
| "io/fs" |
| |
| "go.starlark.net/starlark" |
| ) |
| |
| // FSLoader returns a loader that loads files from a fs.FS implementation. |
| func FSLoader(fsys fs.FS) Loader { |
| return func(path string) (_ starlark.StringDict, src string, err error) { |
| switch body, err := fs.ReadFile(fsys, path); { |
| case errors.Is(err, fs.ErrNotExist): |
| return nil, "", ErrNoModule |
| case err != nil: |
| return nil, "", err |
| default: |
| return nil, string(body), nil |
| } |
| } |
| } |