Merge pull request #162 from DamianZaremba/fix-config-archs-support

Fix config `archs` support

examples/alpine-386_amd64.yaml

@@ -0,0 +1,12 @@
+contents:
+  repositories:
+    - https://dl-cdn.alpinelinux.org/alpine/edge/main
+  packages:
+    - alpine-base
+
+entrypoint:
+  command: /bin/sh -l
+
+archs:
+  - amd64
+  - 386

examples/alpine-amd64.yaml

@@ -0,0 +1,11 @@
+contents:
+  repositories:
+    - https://dl-cdn.alpinelinux.org/alpine/edge/main
+  packages:
+    - alpine-base
+
+entrypoint:
+  command: /bin/sh -l
+
+archs:
+  - amd64

pkg/build/types/types.go

@@ -69,6 +69,16 @@ type Architecture struct{ s string }
 
 func (a Architecture) String() string { return a.s }
 
+func (a *Architecture) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var buf string
+	if err := unmarshal(&buf); err != nil {
+		return err
+	}
+
+	a.s = ParseArchitecture(buf).s
+	return nil
+}
+
 var (
 	_386    = Architecture{"386"}
 	amd64   = Architecture{"amd64"}

pkg/cli/publish.go

@@ -130,7 +130,7 @@ func PublishCmd(ctx context.Context, outputRefs string, archs []types.Architectu
 		workDir := bc.Options.WorkDir
 		imgs := map[types.Architecture]coci.SignedImage{}
 
-		for _, arch := range archs {
+		for _, arch := range bc.ImageConfiguration.Archs {
 			arch := arch
 			bc := *bc