starlark/types: provider kwargs and alias

Signed-off-by: Máximo Cuadros <[email protected]>

starlark/types/computed.go

@@ -89,6 +89,7 @@ func (c *Computed) doNested(name, path string, t cty.Type, index int) *Computed
 	}
 
 }
+
 func (c *Computed) Index(i int) starlark.Value {
 	path := fmt.Sprintf("%s.%d", c.path, i)
 

starlark/types/fixtures/aws.tf

@@ -1,11 +1,11 @@
 provider "aws" {
-  alias   = "id_40"
+  alias   = "id_1"
   version = "2.13.0"
   region  = "us-west-2"
 }
 
-data "aws_ami" "id_44" {
-  provider    = aws.id_40
+data "aws_ami" "id_5" {
+  provider    = aws.id_1
   most_recent = true
   owners      = ["099720109477"]
 
@@ -20,8 +20,8 @@ data "aws_ami" "id_44" {
   }
 }
 
-resource "aws_autoscaling_group" "id_47" {
-  provider           = aws.id_40
+resource "aws_autoscaling_group" "id_8" {
+  provider           = aws.id_1
   availability_zones = ["us-east-1a"]
   desired_capacity   = 1
   max_size           = 1
@@ -30,7 +30,7 @@ resource "aws_autoscaling_group" "id_47" {
   mixed_instances_policy {
     launch_template {
       launch_template_specification {
-        launch_template_id = "${aws_launch_template.id_46.id}"
+        launch_template_id = "${aws_launch_template.id_7.id}"
       }
 
       override {
@@ -44,9 +44,9 @@ resource "aws_autoscaling_group" "id_47" {
   }
 }
 
-resource "aws_instance" "id_45" {
-  provider      = aws.id_40
-  ami           = "${data.aws_ami.id_44.id}"
+resource "aws_instance" "id_6" {
+  provider      = aws.id_1
+  ami           = "${data.aws_ami.id_5.id}"
   instance_type = "t2.micro"
 
   credit_specification {
@@ -55,47 +55,47 @@ resource "aws_instance" "id_45" {
 
   network_interface {
     device_index         = 0
-    network_interface_id = "${aws_network_interface.id_43.id}"
+    network_interface_id = "${aws_network_interface.id_4.id}"
   }
 }
 
-resource "aws_instance" "id_49" {
-  provider      = aws.id_40
+resource "aws_instance" "id_10" {
+  provider      = aws.id_1
   ami           = "ami-2757f631"
   instance_type = "t2.micro"
-  depends_on    = [aws_s3_bucket.id_48]
+  depends_on    = [aws_s3_bucket.id_9]
 }
 
-resource "aws_launch_template" "id_46" {
-  provider      = aws.id_40
-  image_id      = "${data.aws_ami.id_44.id}"
+resource "aws_launch_template" "id_7" {
+  provider      = aws.id_1
+  image_id      = "${data.aws_ami.id_5.id}"
   instance_type = "c5.large"
   name_prefix   = "example"
 }
 
-resource "aws_network_interface" "id_43" {
-  provider    = aws.id_40
+resource "aws_network_interface" "id_4" {
+  provider    = aws.id_1
   private_ips = ["172.16.10.100"]
-  subnet_id   = "${aws_subnet.id_42.id}"
+  subnet_id   = "${aws_subnet.id_3.id}"
   tags        = { Name = "primary_network_iterface" }
 }
 
-resource "aws_s3_bucket" "id_48" {
-  provider = aws.id_40
+resource "aws_s3_bucket" "id_9" {
+  provider = aws.id_1
   acl      = "private"
   bucket   = "terraform-getting-started-guide"
 }
 
-resource "aws_subnet" "id_42" {
-  provider          = aws.id_40
+resource "aws_subnet" "id_3" {
+  provider          = aws.id_1
   availability_zone = "us-west-2a"
   cidr_block        = "172.16.0.0/24"
   tags              = { Name = "tf-example" }
-  vpc_id            = "${aws_vpc.id_41.id}"
+  vpc_id            = "${aws_vpc.id_2.id}"
 }
 
-resource "aws_vpc" "id_41" {
-  provider   = aws.id_40
+resource "aws_vpc" "id_2" {
+  provider   = aws.id_1
   cidr_block = "172.16.0.0/16"
   tags       = { Name = "tf-example" }
 }

starlark/types/provider.go

@@ -13,9 +13,16 @@ import (
 )
 
 func BuiltinProvider(pm *terraform.PluginManager) starlark.Value {
-	return starlark.NewBuiltin("provider", func(_ *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, _ []starlark.Tuple) (starlark.Value, error) {
-		var name, version starlark.String
+	return starlark.NewBuiltin("provider", func(_ *starlark.Thread, _ *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
+		var name, version, alias starlark.String
 		switch len(args) {
+		case 3:
+			var ok bool
+			alias, ok = args.Index(2).(starlark.String)
+			if !ok {
+				return nil, fmt.Errorf("expected string, go %s", args.Index(2).Type())
+			}
+			fallthrough
 		case 2:
 			var ok bool
 			version, ok = args.Index(1).(starlark.String)
@@ -33,22 +40,29 @@ func BuiltinProvider(pm *terraform.PluginManager) starlark.Value {
 			return nil, fmt.Errorf("unexpected positional arguments count")
 		}
 
-		return MakeProvider(pm, name.GoString(), version.GoString())
+		p, err := MakeProvider(pm, name.GoString(), version.GoString(), alias.GoString())
+		if err != nil {
+			return nil, err
+		}
+
+		return p, p.loadKeywordArgs(kwargs)
 	})
 }
 
+// Provider represents a provider as a starlark.Value.
 type Provider struct {
-	name     string
-	provider *plugin.GRPCProvider
-	meta     discovery.PluginMeta
+	name, alias string
+	provider    *plugin.GRPCProvider
+	meta        discovery.PluginMeta
 
 	dataSources *MapSchema
 	resources   *MapSchema
 
 	*Resource
 }
 
-func MakeProvider(pm *terraform.PluginManager, name, version string) (*Provider, error) {
+// MakeProvider returns a new Provider instance from a given name version and alias.
+func MakeProvider(pm *terraform.PluginManager, name, version, alias string) (*Provider, error) {
 	cli, meta, err := pm.Provider(name, version, false)
 	if err != nil {
 		return nil, err
@@ -64,16 +78,21 @@ func MakeProvider(pm *terraform.PluginManager, name, version string) (*Provider,
 		return nil, err
 	}
 
+	if alias == "" {
+		alias = NameGenerator()
+	}
+
 	provider := raw.(*plugin.GRPCProvider)
 	response := provider.GetSchema()
 
 	defer cli.Kill()
 	p := &Provider{
 		name:     name,
+		alias:    alias,
 		provider: provider,
 		meta:     meta,
 
-		Resource: MakeResource(NameGenerator(), name, ProviderKind, response.Provider.Block, nil),
+		Resource: MakeResource(alias, name, ProviderKind, response.Provider.Block, nil),
 	}
 
 	p.dataSources = NewMapSchema(p, name, DataSourceKind, response.DataSources)
@@ -94,6 +113,8 @@ func (p *Provider) Type() string {
 // Attr honors the starlark.HasAttrs interface.
 func (p *Provider) Attr(name string) (starlark.Value, error) {
 	switch name {
+	case "alias":
+		return starlark.String(p.alias), nil
 	case "version":
 		return starlark.String(p.meta.Version), nil
 	case "data":

starlark/types/provider_test.go

@@ -13,8 +13,9 @@ import (
 	"go.starlark.net/starlarktest"
 )
 
+var id int
+
 func init() {
-	var id int
 	NameGenerator = func() string {
 		id++
 		return fmt.Sprintf("id_%d", id)
@@ -48,6 +49,8 @@ func TestHCL(t *testing.T) {
 }
 
 func test(t *testing.T, filename string) {
+	id = 0
+
 	log.SetOutput(ioutil.Discard)
 	thread := &starlark.Thread{Load: load}
 	starlarktest.SetReporter(thread, t)

starlark/types/testdata/provider.star

@@ -18,4 +18,9 @@ assert.eq(len(p.resource.instance), 2)
 p.region = "us-west-2"
 assert.eq(p.region, "us-west-2")
 
-ignition = provider("ignition")
+alias = provider("aws", "2.13.0", "alias")
+assert.eq(alias.alias, "alias")
+assert.eq(alias.version, "2.13.0")
+
+kwargs = provider("aws", region="foo")
+assert.eq(kwargs.region, "foo")

starlark/types/testdata/resource.star

@@ -18,7 +18,7 @@ assert.fails(lambda: qux.foo, "Resource<data.ignition_user> has no .foo field or
 
 # attr id
 assert.eq(type(qux.id), "Computed")
-assert.eq(str(qux.id), '"${data.ignition_user.id_18.id}"')
+assert.eq(str(qux.id), '"${data.ignition_user.id_2.id}"')
 
 # attr output assignation
 aws = provider("aws", "2.13.0")
@@ -34,7 +34,7 @@ assert.fails(invalidType, "expected bool, got string")
 group = aws.resource.autoscaling_group()
 
 # attr optional computed
-assert.eq(str(group.name), '"${aws_autoscaling_group.id_22.name}"')
+assert.eq(str(group.name), '"${aws_autoscaling_group.id_6.name}"')
 
 group.name = "foo"
 assert.eq(group.name, "foo")