use ubuntu-board-gen to start generating images

src/packer/BUILD.bazel

@@ -11,5 +11,5 @@ go_library(
     ],
     importpath = "git.wntrmute.dev/kyle/bladerunner/src/packer",
     visibility = ["//visibility:public"],
-    deps = ["@in_gopkg_yaml_v2//:go_default_library"],
+    deps = ["@in_gopkg_yaml_v2//:yaml_v2"],
 )

src/packer/board.go

@@ -1,8 +1,8 @@
 package packer
 
 type Board struct {
-	Variables      interface{}   `json:"variables"`
-	Builders       []Builder     `json:"builders"`
-	Provisioners   []Provisioner `json:"provisioners"`
-	PostProcessors []string      `json:"post-processors"`
+	Variables      map[string]string `json:"variables"`
+	Builders       []Builder         `json:"builders"`
+	Provisioners   []Provisioner     `json:"provisioners"`
+	PostProcessors []string          `json:"post-processors"`
 }

src/packer/ubuntu.go

@@ -1,9 +1,11 @@
 package packer
 
 import (
+	"bytes"
 	"encoding/json"
 	"fmt"
 	"io/ioutil"
+	"log"
 	"path/filepath"
 	"strings"
 
@@ -72,7 +74,7 @@ func (spec UbuntuBoardSpec) JSONPath(base string) string {
 
 func (spec UbuntuBoardSpec) Board() Board {
 	board := Board{
-		Variables: []string{},
+		Variables: map[string]string{},
 		Builders: []Builder{
 			UbuntuBuilder(spec.Version, spec.Size, spec.ImageName),
 		},
@@ -94,11 +96,13 @@ func (spec UbuntuBoardSpec) Board() Board {
 }
 
 func LoadUbuntuSpecs(path string) (specFile UbuntuBoardSpecFile, err error) {
+	log.Println("loading from", specFile)
 	data, err := ioutil.ReadFile(path)
 	if err != nil {
 		return
 	}
 
+	log.Println("parsing specs")
 	err = yaml.Unmarshal(data, &specFile)
 	if err != nil {
 		return
@@ -124,6 +128,14 @@ func (specFile UbuntuBoardSpecFile) WriteBoards(outputDir string) error {
 			return err
 		}
 
+		buf := &bytes.Buffer{}
+		err = json.Indent(buf, contents, "", "    ")
+		if err != nil {
+			return err
+		}
+		contents = buf.Bytes()
+
+		log.Println("writing spec to", dest)
 		err = ioutil.WriteFile(dest, contents, 0644)
 		if err != nil {
 			return err