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kubetool.go
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kubetool.go
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// Copyright 2022 Namespace Labs Inc; All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
package kubetool
import (
"google.golang.org/grpc/codes"
"google.golang.org/protobuf/proto"
"namespacelabs.dev/foundation/framework/rpcerrors"
)
type perNode interface {
CheckUnpackInput(msg proto.Message) (bool, error)
UnpackInput(proto.Message) error
}
type ContextualEnv struct {
Namespace string
CanSetNamespace bool // `ns` can set the namespace contextually.
Context *KubernetesToolContext
}
// FromRequest is meant to be used by provisioning tools (and thus can os.Exit).
func FromRequest(r perNode) (*ContextualEnv, error) {
var e ContextualEnv
env := &KubernetesEnv{}
if has, err := r.CheckUnpackInput(env); err != nil {
return nil, err
} else if has {
e.Namespace = env.Namespace
}
ctx := &KubernetesToolContext{}
if has, err := r.CheckUnpackInput(ctx); err != nil {
return nil, err
} else if has {
e.Namespace = ctx.Namespace
e.CanSetNamespace = ctx.CanSetNamespace
e.Context = ctx
}
if e.Namespace == "" && !e.CanSetNamespace {
return nil, rpcerrors.Errorf(codes.FailedPrecondition, "expected kubernetes context")
}
return &e, nil
}
func MustNamespace(r perNode) (*ContextualEnv, error) {
res, err := FromRequest(r)
if err != nil {
return nil, err
}
if res.Namespace == "" {
return nil, rpcerrors.Errorf(codes.FailedPrecondition, "kubernetes namespace missing")
}
return res, nil
}