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Merge pull request #1551 from estroz/chore/add-plugin-v3
pkg/plugin/v3: add plugin `v3-alpha`
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/* | ||
Copyright 2020 The Kubernetes 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. | ||
*/ | ||
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package v3 | ||
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import ( | ||
"bufio" | ||
"errors" | ||
"fmt" | ||
"io/ioutil" | ||
"os" | ||
"path/filepath" | ||
"strings" | ||
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"github.com/spf13/pflag" | ||
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"sigs.k8s.io/kubebuilder/internal/cmdutil" | ||
"sigs.k8s.io/kubebuilder/pkg/model" | ||
"sigs.k8s.io/kubebuilder/pkg/model/config" | ||
"sigs.k8s.io/kubebuilder/pkg/model/resource" | ||
"sigs.k8s.io/kubebuilder/pkg/plugin" | ||
"sigs.k8s.io/kubebuilder/pkg/plugin/internal/util" | ||
"sigs.k8s.io/kubebuilder/pkg/plugin/scaffold" | ||
"sigs.k8s.io/kubebuilder/pkg/plugin/v3/scaffolds" | ||
"sigs.k8s.io/kubebuilder/plugins/addon" | ||
) | ||
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// (used only to gen api with --pattern=addon) | ||
// KbDeclarativePatternVersion is the sigs.k8s.io/kubebuilder-declarative-pattern version | ||
// TODO: remove this when a better solution for using addons is implemented. | ||
const KbDeclarativePatternVersion = "v0.0.0-20200522144838-848d48e5b073" | ||
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type createAPIPlugin struct { | ||
config *config.Config | ||
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// pattern indicates that we should use a plugin to build according to a pattern | ||
pattern string | ||
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resource *resource.Options | ||
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// Check if we have to scaffold resource and/or controller | ||
resourceFlag *pflag.Flag | ||
controllerFlag *pflag.Flag | ||
doResource bool | ||
doController bool | ||
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// force indicates that the resource should be created even if it already exists | ||
force bool | ||
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// runMake indicates whether to run make or not after scaffolding APIs | ||
runMake bool | ||
} | ||
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var ( | ||
_ plugin.CreateAPI = &createAPIPlugin{} | ||
_ cmdutil.RunOptions = &createAPIPlugin{} | ||
) | ||
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func (p createAPIPlugin) UpdateContext(ctx *plugin.Context) { | ||
ctx.Description = `Scaffold a Kubernetes API by creating a Resource definition and / or a Controller. | ||
create resource will prompt the user for if it should scaffold the Resource and / or Controller. To only | ||
scaffold a Controller for an existing Resource, select "n" for Resource. To only define | ||
the schema for a Resource without writing a Controller, select "n" for Controller. | ||
After the scaffold is written, api will run make on the project. | ||
` | ||
ctx.Examples = fmt.Sprintf(` # Create a frigates API with Group: ship, Version: v1beta1 and Kind: Frigate | ||
%s create api --group ship --version v1beta1 --kind Frigate | ||
# Edit the API Scheme | ||
nano api/v1beta1/frigate_types.go | ||
# Edit the Controller | ||
nano controllers/frigate/frigate_controller.go | ||
# Edit the Controller Test | ||
nano controllers/frigate/frigate_controller_test.go | ||
# Install CRDs into the Kubernetes cluster using kubectl apply | ||
make install | ||
# Regenerate code and run against the Kubernetes cluster configured by ~/.kube/config | ||
make run | ||
`, | ||
ctx.CommandName) | ||
} | ||
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func (p *createAPIPlugin) BindFlags(fs *pflag.FlagSet) { | ||
fs.BoolVar(&p.runMake, "make", true, "if true, run make after generating files") | ||
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fs.BoolVar(&p.doResource, "resource", true, | ||
"if set, generate the resource without prompting the user") | ||
p.resourceFlag = fs.Lookup("resource") | ||
fs.BoolVar(&p.doController, "controller", true, | ||
"if set, generate the controller without prompting the user") | ||
p.controllerFlag = fs.Lookup("controller") | ||
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// TODO: remove this when a better solution for using addons is implemented. | ||
if os.Getenv("KUBEBUILDER_ENABLE_PLUGINS") != "" { | ||
fs.StringVar(&p.pattern, "pattern", "", | ||
"generates an API following an extension pattern (addon)") | ||
} | ||
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fs.BoolVar(&p.force, "force", false, | ||
"attempt to create resource even if it already exists") | ||
p.resource = &resource.Options{} | ||
fs.StringVar(&p.resource.Kind, "kind", "", "resource Kind") | ||
fs.StringVar(&p.resource.Group, "group", "", "resource Group") | ||
fs.StringVar(&p.resource.Version, "version", "", "resource Version") | ||
fs.BoolVar(&p.resource.Namespaced, "namespaced", true, "resource is namespaced") | ||
} | ||
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func (p *createAPIPlugin) InjectConfig(c *config.Config) { | ||
p.config = c | ||
} | ||
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func (p *createAPIPlugin) Run() error { | ||
return cmdutil.Run(p) | ||
} | ||
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func (p *createAPIPlugin) Validate() error { | ||
if err := p.resource.Validate(); err != nil { | ||
return err | ||
} | ||
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// TODO: re-evaluate whether y/n input still makes sense. We should probably always | ||
// scaffold the resource and controller. | ||
reader := bufio.NewReader(os.Stdin) | ||
if !p.resourceFlag.Changed { | ||
fmt.Println("Create Resource [y/n]") | ||
p.doResource = util.YesNo(reader) | ||
} | ||
if !p.controllerFlag.Changed { | ||
fmt.Println("Create Controller [y/n]") | ||
p.doController = util.YesNo(reader) | ||
} | ||
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// In case we want to scaffold a resource API we need to do some checks | ||
if p.doResource { | ||
// Check that resource doesn't exist or flag force was set | ||
if !p.force && p.config.HasResource(p.resource.GVK()) { | ||
return errors.New("API resource already exists") | ||
} | ||
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// Check that the provided group can be added to the project | ||
if !p.config.MultiGroup && len(p.config.Resources) != 0 && !p.config.HasGroup(p.resource.Group) { | ||
return fmt.Errorf("multiple groups are not allowed by default, " + | ||
"to enable multi-group visit kubebuilder.io/migration/multi-group.html") | ||
} | ||
} | ||
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return nil | ||
} | ||
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func (p *createAPIPlugin) GetScaffolder() (scaffold.Scaffolder, error) { | ||
// Load the boilerplate | ||
bp, err := ioutil.ReadFile(filepath.Join("hack", "boilerplate.go.txt")) // nolint:gosec | ||
if err != nil { | ||
return nil, fmt.Errorf("unable to load boilerplate: %v", err) | ||
} | ||
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// Load the requested plugins | ||
plugins := make([]model.Plugin, 0) | ||
switch strings.ToLower(p.pattern) { | ||
case "": | ||
// Default pattern | ||
case "addon": | ||
plugins = append(plugins, &addon.Plugin{}) | ||
default: | ||
return nil, fmt.Errorf("unknown pattern %q", p.pattern) | ||
} | ||
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// Create the actual resource from the resource options | ||
res := p.resource.NewResource(p.config, p.doResource) | ||
return scaffolds.NewAPIScaffolder(p.config, string(bp), res, p.doResource, p.doController, plugins), nil | ||
} | ||
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func (p *createAPIPlugin) PostScaffold() error { | ||
// Load the requested plugins | ||
switch strings.ToLower(p.pattern) { | ||
case "": | ||
// Default pattern | ||
case "addon": | ||
// Ensure that we are pinning sigs.k8s.io/kubebuilder-declarative-pattern version | ||
// TODO: either find a better way to inject this version (ex. tools.go). | ||
err := util.RunCmd("Get kubebuilder-declarative-pattern dependency", "go", "get", | ||
"sigs.k8s.io/kubebuilder-declarative-pattern@"+KbDeclarativePatternVersion) | ||
if err != nil { | ||
return err | ||
} | ||
default: | ||
return fmt.Errorf("unknown pattern %q", p.pattern) | ||
} | ||
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if p.runMake { | ||
return util.RunCmd("Running make", "make") | ||
} | ||
return nil | ||
} |
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