Add the ability to specify and env config during eval

This adds the --config-env flag which can be used to apply configuration
before performing evaluation of a package.

cmd/env.go

@@ -59,10 +59,12 @@ func initEnvCmd(cmd *cobra.Command, args []string) (*envCmdInfo, error) {
 	if len(args) == 0 {
 		return nil, fmt.Errorf("missing required environment name")
 	}
+	return initEnvCmdName(tokens.QName(args[0]), args[1:])
+}
 
+func initEnvCmdName(name tokens.QName, args []string) (*envCmdInfo, error) {
 	// Read in the deployment information, bailing if an IO error occurs.
 	ctx := resource.NewContext(sink())
-	name := tokens.QName(args[0])
 	envfile, env, old := readEnv(ctx, name)
 	if env == nil {
 		contract.Assert(!ctx.Diag.Success())
@@ -74,8 +76,7 @@ func initEnvCmd(cmd *cobra.Command, args []string) (*envCmdInfo, error) {
 		Env:     env,
 		Envfile: envfile,
 		Old:     old,
-		Args:    args[1:],
-		Orig:    args,
+		Args:    args,
 	}, nil
 }
 
@@ -84,8 +85,7 @@ type envCmdInfo struct {
 	Env     *resource.Env     // the environment information
 	Envfile *resource.Envfile // the full serialized envfile from which this came.
 	Old     resource.Snapshot // the environment's latest deployment snapshot
-	Args    []string          // the rest of the args after extracting the environment name
-	Orig    []string          // the original args before extracting the environment name
+	Args    []string          // the args after extracting the environment name
 }
 
 func (eci *envCmdInfo) Close() error {

cmd/pack_eval.go

@@ -13,10 +13,12 @@ import (
 	"github.com/pulumi/coconut/pkg/eval/heapstate"
 	"github.com/pulumi/coconut/pkg/graph"
 	"github.com/pulumi/coconut/pkg/graph/dotconv"
+	"github.com/pulumi/coconut/pkg/resource"
 	"github.com/pulumi/coconut/pkg/tokens"
 )
 
 func newPackEvalCmd() *cobra.Command {
+	var configEnv string
 	var dotOutput bool
 	var cmd = &cobra.Command{
 		Use:   "eval [package] [-- [args]]",
@@ -31,8 +33,18 @@ func newPackEvalCmd() *cobra.Command {
 			"By default, a blueprint package is loaded from the current directory.  Optionally,\n" +
 			"a path to a package elsewhere can be provided as the [package] argument.",
 		Run: runFunc(func(cmd *cobra.Command, args []string) error {
+			// If a configuration environment was requested, load it.
+			var config resource.ConfigMap
+			if configEnv != "" {
+				envInfo, err := initEnvCmdName(tokens.QName(configEnv), args)
+				if err != nil {
+					return err
+				}
+				config = envInfo.Env.Config
+			}
+
 			// Perform the compilation and, if non-nil is returned, output the graph.
-			if result := compile(cmd, args, nil); result != nil && result.Heap != nil && result.Heap.G != nil {
+			if result := compile(cmd, args, config); result != nil && result.Heap != nil && result.Heap.G != nil {
 				// Serialize that evaluation graph so that it's suitable for printing/serializing.
 				if dotOutput {
 					// Convert the output to a DOT file.
@@ -51,6 +63,9 @@ func newPackEvalCmd() *cobra.Command {
 		}),
 	}
 
+	cmd.PersistentFlags().StringVar(
+		&configEnv, "config-env", "",
+		"Apply configuration from the specified environment before evaluating the package")
 	cmd.PersistentFlags().BoolVar(
 		&dotOutput, "dot", false,
 		"Output the graph as a DOT digraph (graph description language)")