mirror of
https://github.com/opentofu/opentofu.git
synced 2024-12-25 08:21:07 -06:00
ff2d753062
This method mirrors that of config.Backend, so we can compare the configration of a backend read from a config vs that of a backend read from a state. This will prevent init from reinitializing when using `-backend-config` options that match the existing state.
118 lines
3.2 KiB
Go
118 lines
3.2 KiB
Go
package config
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
|
|
"github.com/hashicorp/go-version"
|
|
"github.com/mitchellh/hashstructure"
|
|
)
|
|
|
|
// Terraform is the Terraform meta-configuration that can be present
|
|
// in configuration files for configuring Terraform itself.
|
|
type Terraform struct {
|
|
RequiredVersion string `hcl:"required_version"` // Required Terraform version (constraint)
|
|
Backend *Backend // See Backend struct docs
|
|
}
|
|
|
|
// Validate performs the validation for just the Terraform configuration.
|
|
func (t *Terraform) Validate() []error {
|
|
var errs []error
|
|
|
|
if raw := t.RequiredVersion; raw != "" {
|
|
// Check that the value has no interpolations
|
|
rc, err := NewRawConfig(map[string]interface{}{
|
|
"root": raw,
|
|
})
|
|
if err != nil {
|
|
errs = append(errs, fmt.Errorf(
|
|
"terraform.required_version: %s", err))
|
|
} else if len(rc.Interpolations) > 0 {
|
|
errs = append(errs, fmt.Errorf(
|
|
"terraform.required_version: cannot contain interpolations"))
|
|
} else {
|
|
// Check it is valid
|
|
_, err := version.NewConstraint(raw)
|
|
if err != nil {
|
|
errs = append(errs, fmt.Errorf(
|
|
"terraform.required_version: invalid syntax: %s", err))
|
|
}
|
|
}
|
|
}
|
|
|
|
if t.Backend != nil {
|
|
errs = append(errs, t.Backend.Validate()...)
|
|
}
|
|
|
|
return errs
|
|
}
|
|
|
|
// Merge t with t2.
|
|
// Any conflicting fields are overwritten by t2.
|
|
func (t *Terraform) Merge(t2 *Terraform) {
|
|
if t2.RequiredVersion != "" {
|
|
t.RequiredVersion = t2.RequiredVersion
|
|
}
|
|
|
|
if t2.Backend != nil {
|
|
t.Backend = t2.Backend
|
|
}
|
|
}
|
|
|
|
// Backend is the configuration for the "backend" to use with Terraform.
|
|
// A backend is responsible for all major behavior of Terraform's core.
|
|
// The abstraction layer above the core (the "backend") allows for behavior
|
|
// such as remote operation.
|
|
type Backend struct {
|
|
Type string
|
|
RawConfig *RawConfig
|
|
|
|
// Hash is a unique hash code representing the original configuration
|
|
// of the backend. This won't be recomputed unless Rehash is called.
|
|
Hash uint64
|
|
}
|
|
|
|
// Rehash returns a unique content hash for this backend's configuration
|
|
// as a uint64 value.
|
|
func (b *Backend) Rehash() uint64 {
|
|
// If we have no backend, the value is zero
|
|
if b == nil {
|
|
return 0
|
|
}
|
|
|
|
// Use hashstructure to hash only our type with the config.
|
|
code, err := hashstructure.Hash(map[string]interface{}{
|
|
"type": b.Type,
|
|
"config": b.RawConfig.Raw,
|
|
}, nil)
|
|
|
|
// This should never happen since we have just some basic primitives
|
|
// so panic if there is an error.
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
return code
|
|
}
|
|
|
|
func (b *Backend) Validate() []error {
|
|
if len(b.RawConfig.Interpolations) > 0 {
|
|
return []error{fmt.Errorf(strings.TrimSpace(errBackendInterpolations))}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
const errBackendInterpolations = `
|
|
terraform.backend: configuration cannot contain interpolations
|
|
|
|
The backend configuration is loaded by Terraform extremely early, before
|
|
the core of Terraform can be initialized. This is necessary because the backend
|
|
dictates the behavior of that core. The core is what handles interpolation
|
|
processing. Because of this, interpolations cannot be used in backend
|
|
configuration.
|
|
|
|
If you'd like to parameterize backend configuration, we recommend using
|
|
partial configuration with the "-backend-config" flag to "terraform init".
|
|
`
|