k8s.io/apimachinery@v0.29.2/pkg/util/strategicpatch/testing/openapi.go (about)

     1  /*
     2  Copyright 2017 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package testing
    18  
    19  import (
    20  	"os"
    21  	"sync"
    22  
    23  	openapi_v2 "github.com/google/gnostic-models/openapiv2"
    24  	openapi "k8s.io/kube-openapi/pkg/util/proto"
    25  )
    26  
    27  // Fake opens and returns a openapi swagger from a file Path. It will
    28  // parse only once and then return the same copy everytime.
    29  type Fake struct {
    30  	Path string
    31  
    32  	once     sync.Once
    33  	document *openapi_v2.Document
    34  	err      error
    35  }
    36  
    37  // OpenAPISchema returns the openapi document and a potential error.
    38  func (f *Fake) OpenAPISchema() (*openapi_v2.Document, error) {
    39  	f.once.Do(func() {
    40  		_, err := os.Stat(f.Path)
    41  		if err != nil {
    42  			f.err = err
    43  			return
    44  		}
    45  		spec, err := os.ReadFile(f.Path)
    46  		if err != nil {
    47  			f.err = err
    48  			return
    49  		}
    50  		f.document, f.err = openapi_v2.ParseDocument(spec)
    51  	})
    52  	return f.document, f.err
    53  }
    54  
    55  func getSchema(f *Fake, model string) (openapi.Schema, error) {
    56  	s, err := f.OpenAPISchema()
    57  	if err != nil {
    58  		return nil, err
    59  	}
    60  	m, err := openapi.NewOpenAPIData(s)
    61  	if err != nil {
    62  		return nil, err
    63  	}
    64  	return m.LookupModel(model), nil
    65  }
    66  
    67  // GetSchemaOrDie returns the openapi schema.
    68  func GetSchemaOrDie(f *Fake, model string) openapi.Schema {
    69  	s, err := getSchema(f, model)
    70  	if err != nil {
    71  		panic(err)
    72  	}
    73  	return s
    74  }