Move lang/ to internal/lang/

This is part of a general effort to move all of Terraform's non-library
package surface under internal in order to reinforce that these are for
internal use within Terraform only.

If you were previously importing packages under this prefix into an
external codebase, you could pin to an earlier release tag as an interim
solution until you've make a plan to achieve the same functionality some
other way.

internal/command/jsonconfig/expression.go

@@ -6,7 +6,7 @@ import (
 	"github.com/hashicorp/hcl/v2"
 	"github.com/hashicorp/hcl/v2/hcldec"
 	"github.com/hashicorp/terraform/internal/configs/configschema"
-	"github.com/hashicorp/terraform/lang"
+	"github.com/hashicorp/terraform/internal/lang"
 	"github.com/zclconf/go-cty/cty"
 	ctyjson "github.com/zclconf/go-cty/cty/json"
 )

internal/lang/eval.go

@@ -9,8 +9,8 @@ import (
 	"github.com/hashicorp/terraform/internal/addrs"
 	"github.com/hashicorp/terraform/internal/configs/configschema"
 	"github.com/hashicorp/terraform/internal/instances"
+	"github.com/hashicorp/terraform/internal/lang/blocktoattr"
 	"github.com/hashicorp/terraform/internal/tfdiags"
-	"github.com/hashicorp/terraform/lang/blocktoattr"
 	"github.com/zclconf/go-cty/cty"
 	"github.com/zclconf/go-cty/cty/convert"
 )

internal/lang/functions.go

@@ -10,7 +10,7 @@ import (
 	"github.com/zclconf/go-cty/cty/function/stdlib"
 
 	"github.com/hashicorp/terraform/internal/experiments"
-	"github.com/hashicorp/terraform/lang/funcs"
+	"github.com/hashicorp/terraform/internal/lang/funcs"
 )
 
 var impureFunctions = []string{

internal/lang/references.go

@@ -4,8 +4,8 @@ import (
 	"github.com/hashicorp/hcl/v2"
 	"github.com/hashicorp/terraform/internal/addrs"
 	"github.com/hashicorp/terraform/internal/configs/configschema"
+	"github.com/hashicorp/terraform/internal/lang/blocktoattr"
 	"github.com/hashicorp/terraform/internal/tfdiags"
-	"github.com/hashicorp/terraform/lang/blocktoattr"
 )
 
 // References finds all of the references in the given set of traversals,

internal/repl/session.go

@@ -7,8 +7,8 @@ import (
 
 	"github.com/hashicorp/hcl/v2"
 	"github.com/hashicorp/hcl/v2/hclsyntax"
+	"github.com/hashicorp/terraform/internal/lang"
 	"github.com/hashicorp/terraform/internal/tfdiags"
-	"github.com/hashicorp/terraform/lang"
 )
 
 // Session represents the state for a single REPL session.

terraform/context.go

@@ -11,10 +11,10 @@ import (
 	"github.com/hashicorp/terraform/internal/addrs"
 	"github.com/hashicorp/terraform/internal/configs"
 	"github.com/hashicorp/terraform/internal/instances"
+	"github.com/hashicorp/terraform/internal/lang"
 	"github.com/hashicorp/terraform/internal/providers"
 	"github.com/hashicorp/terraform/internal/provisioners"
 	"github.com/hashicorp/terraform/internal/tfdiags"
-	"github.com/hashicorp/terraform/lang"
 	"github.com/hashicorp/terraform/plans"
 	"github.com/hashicorp/terraform/states"
 	"github.com/zclconf/go-cty/cty"

terraform/eval_context.go

@@ -5,10 +5,10 @@ import (
 	"github.com/hashicorp/terraform/internal/addrs"
 	"github.com/hashicorp/terraform/internal/configs/configschema"
 	"github.com/hashicorp/terraform/internal/instances"
+	"github.com/hashicorp/terraform/internal/lang"
 	"github.com/hashicorp/terraform/internal/providers"
 	"github.com/hashicorp/terraform/internal/provisioners"
 	"github.com/hashicorp/terraform/internal/tfdiags"
-	"github.com/hashicorp/terraform/lang"
 	"github.com/hashicorp/terraform/plans"
 	"github.com/hashicorp/terraform/states"
 	"github.com/zclconf/go-cty/cty"

terraform/eval_context_builtin.go

@@ -16,8 +16,8 @@ import (
 
 	"github.com/hashicorp/hcl/v2"
 	"github.com/hashicorp/terraform/internal/configs/configschema"
+	"github.com/hashicorp/terraform/internal/lang"
 	"github.com/hashicorp/terraform/internal/tfdiags"
-	"github.com/hashicorp/terraform/lang"
 
 	"github.com/hashicorp/terraform/internal/addrs"
 	"github.com/zclconf/go-cty/cty"

terraform/eval_context_mock.go

@@ -6,10 +6,10 @@ import (
 	"github.com/hashicorp/terraform/internal/addrs"
 	"github.com/hashicorp/terraform/internal/configs/configschema"
 	"github.com/hashicorp/terraform/internal/instances"
+	"github.com/hashicorp/terraform/internal/lang"
 	"github.com/hashicorp/terraform/internal/providers"
 	"github.com/hashicorp/terraform/internal/provisioners"
 	"github.com/hashicorp/terraform/internal/tfdiags"
-	"github.com/hashicorp/terraform/lang"
 	"github.com/hashicorp/terraform/plans"
 	"github.com/hashicorp/terraform/states"
 	"github.com/zclconf/go-cty/cty"

terraform/eval_for_each.go

@@ -4,8 +4,8 @@ import (
 	"fmt"
 
 	"github.com/hashicorp/hcl/v2"
+	"github.com/hashicorp/terraform/internal/lang"
 	"github.com/hashicorp/terraform/internal/tfdiags"
-	"github.com/hashicorp/terraform/lang"
 	"github.com/zclconf/go-cty/cty"
 )
 

terraform/evaluate.go

@@ -16,8 +16,8 @@ import (
 	"github.com/hashicorp/terraform/internal/configs"
 	"github.com/hashicorp/terraform/internal/configs/configschema"
 	"github.com/hashicorp/terraform/internal/instances"
+	"github.com/hashicorp/terraform/internal/lang"
 	"github.com/hashicorp/terraform/internal/tfdiags"
-	"github.com/hashicorp/terraform/lang"
 	"github.com/hashicorp/terraform/plans"
 	"github.com/hashicorp/terraform/states"
 )

terraform/evaluate_valid_test.go

@@ -8,7 +8,7 @@ import (
 
 	"github.com/hashicorp/terraform/internal/addrs"
 	"github.com/hashicorp/terraform/internal/configs/configschema"
-	"github.com/hashicorp/terraform/lang"
+	"github.com/hashicorp/terraform/internal/lang"
 )
 
 func TestStaticValidateReferences(t *testing.T) {

terraform/node_local.go

@@ -8,8 +8,8 @@ import (
 	"github.com/hashicorp/terraform/internal/addrs"
 	"github.com/hashicorp/terraform/internal/configs"
 	"github.com/hashicorp/terraform/internal/dag"
+	"github.com/hashicorp/terraform/internal/lang"
 	"github.com/hashicorp/terraform/internal/tfdiags"
-	"github.com/hashicorp/terraform/lang"
 	"github.com/zclconf/go-cty/cty"
 )
 

terraform/node_module_expand.go

@@ -6,8 +6,8 @@ import (
 	"github.com/hashicorp/terraform/internal/addrs"
 	"github.com/hashicorp/terraform/internal/configs"
 	"github.com/hashicorp/terraform/internal/dag"
+	"github.com/hashicorp/terraform/internal/lang"
 	"github.com/hashicorp/terraform/internal/tfdiags"
-	"github.com/hashicorp/terraform/lang"
 )
 
 type ConcreteModuleNodeFunc func(n *nodeExpandModule) dag.Vertex

terraform/node_module_variable.go

@@ -9,8 +9,8 @@ import (
 	"github.com/hashicorp/terraform/internal/configs"
 	"github.com/hashicorp/terraform/internal/dag"
 	"github.com/hashicorp/terraform/internal/instances"
+	"github.com/hashicorp/terraform/internal/lang"
 	"github.com/hashicorp/terraform/internal/tfdiags"
-	"github.com/hashicorp/terraform/lang"
 	"github.com/zclconf/go-cty/cty"
 	"github.com/zclconf/go-cty/cty/convert"
 )

terraform/node_output.go

@@ -8,8 +8,8 @@ import (
 	"github.com/hashicorp/terraform/internal/addrs"
 	"github.com/hashicorp/terraform/internal/configs"
 	"github.com/hashicorp/terraform/internal/dag"
+	"github.com/hashicorp/terraform/internal/lang"
 	"github.com/hashicorp/terraform/internal/tfdiags"
-	"github.com/hashicorp/terraform/lang"
 	"github.com/hashicorp/terraform/plans"
 	"github.com/hashicorp/terraform/states"
 	"github.com/zclconf/go-cty/cty"

terraform/node_resource_abstract.go

@@ -8,8 +8,8 @@ import (
 	"github.com/hashicorp/terraform/internal/configs"
 	"github.com/hashicorp/terraform/internal/configs/configschema"
 	"github.com/hashicorp/terraform/internal/dag"
+	"github.com/hashicorp/terraform/internal/lang"
 	"github.com/hashicorp/terraform/internal/tfdiags"
-	"github.com/hashicorp/terraform/lang"
 	"github.com/hashicorp/terraform/states"
 )
 

terraform/node_resource_apply.go

@@ -5,8 +5,8 @@ import (
 
 	"github.com/hashicorp/terraform/internal/addrs"
 	"github.com/hashicorp/terraform/internal/dag"
+	"github.com/hashicorp/terraform/internal/lang"
 	"github.com/hashicorp/terraform/internal/tfdiags"
-	"github.com/hashicorp/terraform/lang"
 )
 
 // nodeExpandApplyableResource handles the first layer of resource

terraform/transform_reference.go

@@ -9,7 +9,7 @@ import (
 	"github.com/hashicorp/terraform/internal/addrs"
 	"github.com/hashicorp/terraform/internal/configs/configschema"
 	"github.com/hashicorp/terraform/internal/dag"
-	"github.com/hashicorp/terraform/lang"
+	"github.com/hashicorp/terraform/internal/lang"
 )
 
 // GraphNodeReferenceable must be implemented by any node that represents

terraform/validate_selfref.go

@@ -7,8 +7,8 @@ import (
 
 	"github.com/hashicorp/terraform/internal/addrs"
 	"github.com/hashicorp/terraform/internal/configs/configschema"
+	"github.com/hashicorp/terraform/internal/lang"
 	"github.com/hashicorp/terraform/internal/tfdiags"
-	"github.com/hashicorp/terraform/lang"
 )
 
 // validateSelfRef checks to ensure that expressions within a particular