opentofu/terraform/eval_context_builtin.go
2015-02-19 12:07:54 -08:00

56 lines
1.4 KiB
Go

package terraform
import (
"fmt"
"sync"
"github.com/hashicorp/terraform/config"
)
// BuiltinEvalContext is an EvalContext implementation that is used by
// Terraform by default.
type BuiltinEvalContext struct {
Providers map[string]ResourceProviderFactory
providers map[string]ResourceProvider
once sync.Once
}
func (ctx *BuiltinEvalContext) InitProvider(n string) (ResourceProvider, error) {
ctx.once.Do(ctx.init)
if p := ctx.Provider(n); p != nil {
return nil, fmt.Errorf("Provider '%s' already initialized", n)
}
f, ok := ctx.Providers[n]
if !ok {
return nil, fmt.Errorf("Provider '%s' not found", n)
}
return f()
}
func (ctx *BuiltinEvalContext) Provider(n string) ResourceProvider {
ctx.once.Do(ctx.init)
return ctx.providers[n]
}
func (ctx *BuiltinEvalContext) Interpolate(
config *config.RawConfig) (*ResourceConfig, error) {
// TODO: Actual interpolation, for now we just return it as-is
return NewResourceConfig(config), nil
}
func (ctx *BuiltinEvalContext) init() {
// We nil-check the things below because they're meant to be configured,
// and we just default them to non-nil.
if ctx.Providers == nil {
ctx.Providers = make(map[string]ResourceProviderFactory)
}
// We always reset the things below since we only call this once and
// they can't be initialized externally.
ctx.providers = make(map[string]ResourceProvider)
}