terraform/backend/remote-state/backend.go

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// Package remotestate implements a Backend for remote state implementations
// from the state/remote package that also implement a backend schema for
// configuration.
package remotestate
import (
"context"
"github.com/zclconf/go-cty/cty"
"github.com/hashicorp/terraform/backend"
"github.com/hashicorp/terraform/helper/schema"
"github.com/hashicorp/terraform/state/remote"
"github.com/hashicorp/terraform/states/statemgr"
"github.com/hashicorp/terraform/tfdiags"
)
// Backend implements backend.Backend for remote state backends.
//
// All exported fields should be set. This struct should only be used
// by implementers of backends, not by consumers. If you're consuming, please
// use a higher level package such as Consul backends.
type Backend struct {
// Backend should be set to the configuration schema. ConfigureFunc
// should not be set on the schema.
*schema.Backend
// ConfigureFunc takes the ctx from a schema.Backend and returns a
// fully configured remote client to use for state operations.
ConfigureFunc func(ctx context.Context) (remote.Client, error)
client remote.Client
}
func (b *Backend) Configure(obj cty.Value) tfdiags.Diagnostics {
// Set our configureFunc manually
b.Backend.ConfigureFunc = func(ctx context.Context) error {
c, err := b.ConfigureFunc(ctx)
if err != nil {
return err
}
// Set the client for later
b.client = c
return nil
}
return b.Backend.Configure(obj)
}
func (b *Backend) Workspaces() ([]string, error) {
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return nil, backend.ErrNamedStatesNotSupported
}
func (b *Backend) DeleteWorkspace(name string) error {
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return backend.ErrNamedStatesNotSupported
}
func (b *Backend) StateMgr(name string) (statemgr.Full, error) {
// This shouldn't happen
if b.client == nil {
panic("nil remote client")
}
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if name != backend.DefaultStateName {
return nil, backend.ErrNamedStatesNotSupported
}
s := &remote.State{Client: b.client}
return s, nil
}