mirror of https://github.com/istio/istio.io.git
135 lines
3.0 KiB
Go
135 lines
3.0 KiB
Go
// Copyright Istio Authors
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package istioio
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import (
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"io/ioutil"
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"path/filepath"
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"istio.io/istio/pkg/test/env"
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"istio.io/istio/pkg/test/util/tmpl"
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)
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type Input interface {
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InputSelector
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Name() string
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ReadAll() (string, error)
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}
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type InputSelector interface {
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SelectInput(Context) Input
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}
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var _ Input = Path("")
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var _ InputSelector = Path("")
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// TODO(nmittler): Rename to File
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type Path string
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func (p Path) Name() string {
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return string(p)
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}
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func (p Path) ReadAll() (string, error) {
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content, err := ioutil.ReadFile(string(p))
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return string(content), err
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}
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func (p Path) SelectInput(ctx Context) Input {
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ctx.Helper()
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return p
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}
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var _ Input = Inline{}
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var _ InputSelector = Inline{}
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type Inline struct {
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FileName string
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Value string
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}
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func (t Inline) Name() string {
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return t.FileName
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}
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func (t Inline) ReadAll() (string, error) {
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return t.Value, nil
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}
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func (t Inline) SelectInput(ctx Context) Input {
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ctx.Helper()
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return t
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}
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func BookInfo(relativePath string) Input {
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return Path(filepath.Join(env.IstioSrc, "samples/bookinfo/platform/kube/"+relativePath))
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}
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func InputSelectorFunc(fn func(ctx Context) Input) InputSelector {
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return &inputSelector{fn: fn}
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}
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type inputSelector struct {
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fn func(Context) Input
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}
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func (s *inputSelector) SelectInput(ctx Context) Input {
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ctx.Helper()
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return s.fn(ctx)
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}
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var _ InputSelector = IfMinikube{}
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// IfMinikube is a FileSelector that chooses Input based on whether the environment is configured for Minikube.
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type IfMinikube struct {
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// Then is selected when the environment is configured for Minikube.
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Then InputSelector
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// Else is selected whtn the environment is NOT configured for Minikube.
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Else InputSelector
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}
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func (s IfMinikube) SelectInput(ctx Context) Input {
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ctx.Helper()
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if ctx.KubeEnv().Settings().Minikube {
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return s.Then.SelectInput(ctx)
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}
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return s.Else.SelectInput(ctx)
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}
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func Evaluate(selector InputSelector, data map[string]interface{}) InputSelector {
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return InputSelectorFunc(func(ctx Context) Input {
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ctx.Helper()
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input := selector.SelectInput(ctx)
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// Read the input template.
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templateContent, err := input.ReadAll()
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if err != nil {
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ctx.Fatalf("failed reading input %s: %v", input.Name(), err)
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}
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// Evaluate the input file as a template.
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output, err := tmpl.Evaluate(templateContent, data)
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if err != nil {
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ctx.Fatalf("failed evaluating template %s: %v", input.Name(), err)
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}
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return Inline{
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FileName: input.Name(),
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Value: output,
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}
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})
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}
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