github.com/GoogleContainerTools/kpt@v1.0.0-beta.50.0.20240520170205-c25345ffcbee/pkg/fn/multiruntime.go (about) 1 // Copyright 2022 The kpt Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package fn 16 17 import ( 18 "context" 19 "errors" 20 21 v1 "github.com/GoogleContainerTools/kpt/pkg/api/kptfile/v1" 22 ) 23 24 // MultiRuntime is a compound FunctionRuntime that will use the first available runner. 25 type MultiRuntime struct { 26 runtimes []FunctionRuntime 27 } 28 29 // NewMultiRuntime builds a MultiRuntime. 30 func NewMultiRuntime(runtimes []FunctionRuntime) *MultiRuntime { 31 return &MultiRuntime{ 32 runtimes: runtimes, 33 } 34 } 35 36 var _ FunctionRuntime = &MultiRuntime{} 37 38 // GetRunner implements FunctionRuntime 39 func (r *MultiRuntime) GetRunner(ctx context.Context, fn *v1.Function) (FunctionRunner, error) { 40 for _, runtime := range r.runtimes { 41 runner, err := runtime.GetRunner(ctx, fn) 42 if err != nil { 43 var notFoundError *NotFoundError 44 if !errors.As(err, ¬FoundError) { 45 return nil, err 46 } 47 } else { 48 return runner, nil 49 } 50 } 51 52 return nil, &NotFoundError{Function: *fn} 53 } 54 55 // Add adds the provided runtime to the end of the MultiRuntime list. 56 func (r *MultiRuntime) Add(runtime FunctionRuntime) { 57 r.runtimes = append(r.runtimes, runtime) 58 }