From bae9f6d2fd5eb5bc80929bd393932b23f14d7c93 Mon Sep 17 00:00:00 2001
From: Jake Champlin <jake.champlin.27@gmail.com>
Date: Tue, 6 Jun 2017 12:40:07 -0400
Subject: Initial transfer of provider code

---
 .../hashicorp/terraform/config/config_terraform.go | 117 +++++++++++++++++++++
 1 file changed, 117 insertions(+)
 create mode 100644 vendor/github.com/hashicorp/terraform/config/config_terraform.go

(limited to 'vendor/github.com/hashicorp/terraform/config/config_terraform.go')

diff --git a/vendor/github.com/hashicorp/terraform/config/config_terraform.go b/vendor/github.com/hashicorp/terraform/config/config_terraform.go
new file mode 100644
index 0000000..8535c96
--- /dev/null
+++ b/vendor/github.com/hashicorp/terraform/config/config_terraform.go
@@ -0,0 +1,117 @@
+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".
+`
-- 
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