feat: add build platform choice logic to initializeData

hack/actions/gen/main.go

@@ -291,11 +291,40 @@ func generateWorkflowStruct(data *Data) Workflow {
 
 func sortedPullRequestPaths(data *Data) []string { // TODO: ContainerTypeごとなどいろいろ条件分岐
 	// イメージをビルドする全ワークフローに共通のパス
-	pullRequestPaths := []string{"hack/docker/gen/main.go", "hack/actions/gen/main.go", ".github/actions/docker-build/action.yaml", ".github/workflows/_docker-image.yaml"}
-	// TODO: 残りの処理
+	pullRequestPaths := []string{
+		"hack/docker/gen/main.go",
+		"hack/actions/gen/main.go",
+		".github/actions/docker-build/action.yaml",
+		".github/workflows/_docker-image.yaml",
+	}
+
 	return pullRequestPaths
 }
 
+func buildPlatforms(name string) (string, bool) {
+	baseImages := map[string]struct{}{
+		"binfmt":                {},
+		"buildbase":             {},
+		"buildkit":              {},
+		"buildkit-syft-scanner": {},
+	}
+
+	amdOnlyImages := map[string]struct{}{
+		"ci-container":  {},
+		"dev-container": {},
+		"loadtest":      {},
+	}
+
+	if _, ok := baseImages[name]; ok {
+		return "linux/amd64,linux/arm64", true
+	}
+	if _, ok := amdOnlyImages[name]; ok {
+		return "linux/amd64", true
+	}
+
+	return "", false
+}
+
 func initializeData(data *Data) {
 	pullRequestPaths := sortedPullRequestPaths(data)
 
@@ -305,12 +334,14 @@ func initializeData(data *Data) {
 	data.PullRequestTargetPaths = pullRequestPaths
 	data.BuildUses = "./.github/workflows/_docker-image.yaml"
 	data.BuildTarget = data.Name
-	data.BuildPlatforms = "linux/amd64,linux/arm64" // TODO: ここも分岐必要？？
 	data.BuildSecrets = "inherit"
 
 	if data.AliasImage {
 		data.Cron = ""
 	}
+	if buildPlatforms, ok := buildPlatforms(data.Name); ok {
+		data.BuildPlatforms = buildPlatforms
+	}
 }
 
 func main() {