Merge pull request #4258 from apostasie/2025-05-make-compose-people-happy

Add support for compose AdditionalContexts

Author: AkihiroSuda

pkg/composer/serviceparser/build.go

@@ -34,7 +34,7 @@ import (
 
 func parseBuildConfig(c *types.BuildConfig, project *types.Project, imageName string) (*Build, error) {
 	if unknown := reflectutil.UnknownNonEmptyFields(c,
-		"Context", "Dockerfile", "Args", "CacheFrom", "Target", "Labels", "Secrets",
+		"Context", "Dockerfile", "Args", "CacheFrom", "Target", "Labels", "Secrets", "AdditionalContexts",
 	); len(unknown) > 0 {
 		log.L.Warnf("Ignoring: build: %+v", unknown)
 	}
@@ -72,6 +72,10 @@ func parseBuildConfig(c *types.BuildConfig, project *types.Project, imageName st
 		b.BuildArgs = append(b.BuildArgs, "--cache-from="+s)
 	}
 
+	for k, v := range c.AdditionalContexts {
+		b.BuildArgs = append(b.BuildArgs, "--build-context="+k+"="+v)
+	}
+
 	if c.Target != "" {
 		b.BuildArgs = append(b.BuildArgs, "--target="+c.Target)
 	}