bake: initial implementation

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

bake/compose_test.go

@@ -0,0 +1,41 @@
+package bake
+
+import (
+	"sort"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestParseCompose(t *testing.T) {
+	var dt = []byte(`
+version: "3"
+
+services:
+  db:
+    build: ./db
+    command: ./entrypoint.sh
+    image: docker.io/tonistiigi/db
+  webapp:
+    build:
+      context: ./dir
+      dockerfile: Dockerfile-alternate
+      args:
+        buildno: 123
+`)
+
+	c, err := ParseCompose(dt)
+	require.NoError(t, err)
+
+	require.Equal(t, 1, len(c.Group))
+	sort.Strings(c.Group["default"].Targets)
+	require.Equal(t, []string{"db", "webapp"}, c.Group["default"].Targets)
+
+	require.Equal(t, 2, len(c.Target))
+	require.Equal(t, "./db", c.Target["db"].Context)
+
+	require.Equal(t, "./dir", c.Target["webapp"].Context)
+	require.Equal(t, "Dockerfile-alternate", c.Target["webapp"].Dockerfile)
+	require.Equal(t, 1, len(c.Target["webapp"].Args))
+	require.Equal(t, "123", c.Target["webapp"].Args["buildno"])
+}