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pipeline.go
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pipeline.go
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package pipeline
import (
"context"
"fmt"
"slices"
"strings"
"github.com/go-logr/logr"
configv1alpha1 "github.com/rigdev/rig/pkg/api/config/v1alpha1"
"github.com/rigdev/rig/pkg/api/v1alpha2"
"github.com/rigdev/rig/pkg/errors"
"golang.org/x/exp/maps"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"sigs.k8s.io/controller-runtime/pkg/client"
)
type Object struct {
Current client.Object
New client.Object
Materialized client.Object
}
type ObjectKey struct {
client.ObjectKey
schema.GroupVersionKind
}
func sortedKeys(keys []ObjectKey) []ObjectKey {
slices.SortStableFunc(keys, func(k1, k2 ObjectKey) int { return strings.Compare(k1.String(), k2.String()) })
return keys
}
func (ok ObjectKey) String() string {
return fmt.Sprintf("%s/%s", ok.GroupVersionKind.String(), ok.ObjectKey.String())
}
func (ok ObjectKey) MarshalLog() interface{} {
return struct {
Group string `json:"group,omitempty"`
Version string `json:"version,omitempty"`
Kind string `json:"kind"`
Name string `json:"name"`
Namespace string `json:"namespace,omitempty"`
}{
Name: ok.Name,
Namespace: ok.Namespace,
Group: ok.Group,
Kind: ok.Kind,
Version: ok.Version,
}
}
type CapsulePipeline struct {
client client.Client
reader client.Reader
config *configv1alpha1.OperatorConfig
scheme *runtime.Scheme
// TODO Use zap instead
logger logr.Logger
steps []Step[CapsuleRequest]
}
func NewCapsulePipeline(
cc client.Client,
cr client.Reader,
config *configv1alpha1.OperatorConfig,
scheme *runtime.Scheme,
logger logr.Logger,
) *CapsulePipeline {
p := &CapsulePipeline{
client: cc,
reader: cr,
config: config,
scheme: scheme,
logger: logger,
}
return p
}
func (p *CapsulePipeline) AddStep(step Step[CapsuleRequest]) {
p.steps = append(p.steps, step)
}
func (p *CapsulePipeline) RunCapsule(
ctx context.Context,
capsule *v1alpha2.Capsule,
opts ...CapsuleRequestOption,
) (*Result, error) {
req := newCapsuleRequest(p, capsule, opts...)
return ExecuteRequest(ctx, req, p.steps, true)
}
type OutputObject struct {
ObjectKey ObjectKey
Object client.Object
State ResourceState
}
type Result struct {
InputObjects []client.Object
OutputObjects []OutputObject
}
// TODO This ExecuteableRequest type construction is a bit messy
// Find a better abstraction
type ExecutableRequest[T Request] interface {
GetRequest() T
GetBase() *RequestBase
}
func ExecuteRequest[T Request](
ctx context.Context,
req ExecutableRequest[T],
steps []Step[T],
commit bool,
) (*Result, error) {
result, err := executeRequestInner(ctx, req, steps, commit)
if errors.IsFailedPrecondition(err) {
return nil, err
} else if err != nil {
if !req.GetBase().dryRun {
if err := req.GetBase().Strategies.UpdateStatusWithError(ctx, err); err != nil {
return nil, err
}
}
return nil, err
}
return result, nil
}
func executeRequestInner[T Request](
ctx context.Context,
req ExecutableRequest[T], steps []Step[T],
commit bool) (*Result, error) {
if err := req.GetBase().Strategies.LoadExistingObjects(ctx); err != nil {
return nil, err
}
for {
result := req.GetBase().PrepareRequest()
req.GetBase().logger.Info("run steps", "existing_objects", maps.Keys(req.GetBase().existingObjects))
for _, s := range steps {
if err := s.Apply(ctx, req.GetRequest()); err != nil {
return nil, err
}
}
if !commit {
return result, nil
}
changes, err := req.GetBase().Commit(ctx)
if errors.IsAborted(err) {
req.GetBase().logger.Error(err, "retry running steps")
continue
} else if err != nil {
req.GetBase().logger.Error(err, "error committing changes")
return nil, err
}
for key, c := range changes {
obj := req.GetBase().newObjects[key].Materialized
if obj == nil {
obj = req.GetBase().newObjects[key].New
}
result.OutputObjects = append(result.OutputObjects, OutputObject{
ObjectKey: key,
Object: obj,
State: c.state,
})
}
return result, nil
}
}