bake: support compose inline dockerfile

compose-go v1.13.0 supports the new dockerfile_inline to allow including
a dockerfile inline in the compose definition, so we should map this to
bake's dockerfile-inline property.

Signed-off-by: Justin Chadwell <me@jedevc.com>

bake/compose.go

@@ -69,6 +69,11 @@ func ParseCompose(cfgs []compose.ConfigFile, envs map[string]string) (*Config, e
 				dockerfilePath := s.Build.Dockerfile
 				dockerfilePathP = &dockerfilePath
 			}
+			var dockerfileInlineP *string
+			if s.Build.DockerfileInline != "" {
+				dockerfileInline := s.Build.DockerfileInline
+				dockerfileInlineP = &dockerfileInline
+			}
 
 			var secrets []string
 			for _, bs := range s.Build.Secrets {
@@ -91,6 +96,7 @@ func ParseCompose(cfgs []compose.ConfigFile, envs map[string]string) (*Config, e
 				Name:             targetName,
 				Context:          contextPathP,
 				Dockerfile:       dockerfilePathP,
+				DockerfileInline: dockerfileInlineP,
 				Tags:             s.Build.Tags,
 				Labels:           labels,
 				Args: flatten(s.Build.Args.Resolve(func(val string) (string, bool) {

bake/compose_test.go

@@ -33,6 +33,11 @@ services:
       secrets:
         - token
         - aws
+  webapp2:
+    build:
+      context: ./dir
+      dockerfile_inline: |
+        FROM alpine
 secrets:
   token:
     environment: ENV_TOKEN
@@ -46,9 +51,9 @@ secrets:
 	require.Equal(t, 1, len(c.Groups))
 	require.Equal(t, "default", c.Groups[0].Name)
 	sort.Strings(c.Groups[0].Targets)
-	require.Equal(t, []string{"db", "webapp"}, c.Groups[0].Targets)
+	require.Equal(t, []string{"db", "webapp", "webapp2"}, c.Groups[0].Targets)
 
-	require.Equal(t, 2, len(c.Targets))
+	require.Equal(t, 3, len(c.Targets))
 	sort.Slice(c.Targets, func(i, j int) bool {
 		return c.Targets[i].Name < c.Targets[j].Name
 	})
@@ -68,6 +73,10 @@ secrets:
 		"id=token,env=ENV_TOKEN",
 		"id=aws,src=/root/.aws/credentials",
 	}, c.Targets[1].Secrets)
+
+	require.Equal(t, "webapp2", c.Targets[2].Name)
+	require.Equal(t, "./dir", *c.Targets[2].Context)
+	require.Equal(t, "FROM alpine\n", *c.Targets[2].DockerfileInline)
 }
 
 func TestNoBuildOutOfTreeService(t *testing.T) {