153 lines
3.3 KiB
Go
153 lines
3.3 KiB
Go
/*
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Copyright 2021 The Dapr Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package conformance
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import (
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"bufio"
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"bytes"
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"errors"
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"io"
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"log"
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"os"
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"path/filepath"
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"strings"
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"sigs.k8s.io/yaml"
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)
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const (
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yamlSeparator = "\n---"
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componentKind = "Component"
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)
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// StandaloneComponents loads components in a standalone mode environment.
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type StandaloneComponents struct {
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componentsPath string
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}
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// NewStandaloneComponents returns a new standalone loader.
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func NewStandaloneComponents(componentPath string) *StandaloneComponents {
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return &StandaloneComponents{
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componentsPath: componentPath,
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}
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}
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// LoadComponents loads dapr components from a given directory.
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func (s *StandaloneComponents) LoadComponents() ([]Component, error) {
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dir := s.componentsPath
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files, err := os.ReadDir(dir)
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if err != nil {
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return nil, err
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}
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list := []Component{}
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for _, file := range files {
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if !file.IsDir() && s.isYaml(file.Name()) {
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path := filepath.Join(dir, file.Name())
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b, err := os.ReadFile(path)
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if err != nil {
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log.Printf("error reading file %s : %s", path, err)
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continue
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}
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components := s.decodeYaml(path, b)
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list = append(list, components...)
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}
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}
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return list, nil
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}
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// isYaml checks whether the file is yaml or not.
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func (s *StandaloneComponents) isYaml(fileName string) bool {
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extension := strings.ToLower(filepath.Ext(fileName))
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if extension == ".yaml" || extension == ".yml" {
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return true
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}
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return false
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}
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// decodeYaml decodes the yaml document.
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func (s *StandaloneComponents) decodeYaml(filename string, b []byte) []Component {
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list := []Component{}
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scanner := bufio.NewScanner(bytes.NewReader(b))
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scanner.Split(s.splitYamlDoc)
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for {
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var comp Component
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err := s.decode(scanner, &comp)
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if errors.Is(err, io.EOF) {
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break
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}
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if comp.Kind != componentKind {
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continue
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}
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list = append(list, comp)
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}
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return list
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}
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// decode reads the YAML resource in document.
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func (s *StandaloneComponents) decode(scanner *bufio.Scanner, c any) error {
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if scanner.Scan() {
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return yaml.Unmarshal(scanner.Bytes(), c)
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}
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err := scanner.Err()
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if err == nil {
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err = io.EOF
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}
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return err
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}
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// splitYamlDoc - splits the yaml docs.
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func (s *StandaloneComponents) splitYamlDoc(data []byte, atEOF bool) (advance int, token []byte, err error) {
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if atEOF && len(data) == 0 {
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return 0, nil, nil
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}
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sep := len([]byte(yamlSeparator))
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if i := bytes.Index(data, []byte(yamlSeparator)); i >= 0 {
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i += sep
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after := data[i:]
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if len(after) == 0 {
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if atEOF {
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return len(data), data[:len(data)-sep], nil
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}
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return 0, nil, nil
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}
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if j := bytes.IndexByte(after, '\n'); j >= 0 {
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return i + j + 1, data[0 : i-sep], nil
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}
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return 0, nil, nil
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}
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// If we're at EOF, we have a final, non-terminated line. Return it.
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if atEOF {
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return len(data), data, nil
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}
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// Request more data.
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return 0, nil, nil
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}
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