Attach builders to artifacts.

Ecosystem namespaces will contain a mix of dynamically-imported artifacts and built artifacts.

DI artifacts produced by the star-builder should invoke an ecosystem-specific installation procedure.

Artifacts produced by other builders should be installed as normal.

Note: uninstallation will not work because depot artifacts are not tied to builders. This will need to be addressed in a follow-up ticket.

Author: mitchell-as

pkg/buildplan/artifact.go

@@ -29,6 +29,8 @@ type Artifact struct {
 	IsRuntimeDependency   bool
 	IsBuildtimeDependency bool
 
+	Builder *Artifact
+
 	platforms []strfmt.UUID
 	children  []ArtifactRelation
 }

pkg/buildplan/hydrate.go

@@ -37,11 +37,15 @@ func (b *BuildPlan) hydrate() error {
 		}
 
 		// We have all the artifacts we're interested in now, but we still want to relate them to a source; ie. an ingredient.
+		// We also want to relate artifacts to their builders, because dynamically imported ingredients have a special installation process.
 		// This will also hydrate our requirements, because they are based on the source ID.
 		for _, artifact := range b.artifacts {
 			if err := b.hydrateWithIngredients(artifact, platformID, ingredientLookup); err != nil {
 				return errs.Wrap(err, "hydrating with ingredients failed")
 			}
+			if err := b.hydrateWithBuilders(artifact, artifactLookup); err != nil {
+				return errs.Wrap(err, "hydrating with builders failed")
+			}
 		}
 	}
 
@@ -202,6 +206,30 @@ func (b *BuildPlan) hydrateWithIngredients(artifact *Artifact, platformID *strfm
 	return nil
 }
 
+func (b *BuildPlan) hydrateWithBuilders(artifact *Artifact, artifactLookup map[strfmt.UUID]*Artifact) error {
+	err := b.raw.WalkViaSteps([]strfmt.UUID{artifact.ArtifactID}, raw.WalkViaBuilder, func(node interface{}, parent *raw.Artifact) error {
+		v, ok := node.(*raw.Artifact)
+		if !ok {
+			return nil // continue
+		}
+
+		builder, ok := artifactLookup[v.NodeID]
+		if !ok {
+			builder = createArtifact(v)
+			b.artifacts = append(b.artifacts, builder)
+			artifactLookup[v.NodeID] = builder
+		}
+
+		artifact.Builder = builder
+		return nil
+	})
+	if err != nil {
+		return errs.Wrap(err, "error hydrating builders")
+	}
+
+	return nil
+}
+
 // sanityCheck will for convenience sake validate that we have no duplicates here while on a dev machine.
 // If there are duplicates we're likely to see failures down the chain if live, though that's by no means guaranteed.
 // Surfacing it here will make it easier to reason about the failure.

pkg/buildplan/raw/raw.go

@@ -18,6 +18,7 @@ type StepInputTag string
 const (
 	// Tag types
 	TagSource     StepInputTag = "src"
+	TagBuilder    StepInputTag = "builder"
 	TagDependency StepInputTag = "deps"
 )
 

pkg/buildplan/raw/walk.go

@@ -27,6 +27,10 @@ var (
 		TagDependency,
 		false,
 	}
+	WalkViaBuilder = WalkStrategy{
+		TagBuilder,
+		true,
+	}
 )
 
 // WalkViaSteps walks the graph and reports on nodes it encounters

pkg/runtime/ecosystem.go

@@ -5,6 +5,8 @@ import (
 	ecosys "github.com/ActiveState/cli/pkg/runtime/ecosystem"
 )
 
+const starBuilder = "star-builder"
+
 type ecosystem interface {
 	Init(runtimePath string, buildplan *buildplan.BuildPlan) error
 	Namespaces() []string
@@ -27,6 +29,10 @@ func init() {
 }
 
 func artifactMatchesEcosystem(a *buildplan.Artifact, e ecosystem) bool {
+	if a.Builder != nil && a.Builder.DisplayName != starBuilder {
+		return false
+	}
+
 	for _, namespace := range e.Namespaces() {
 		for _, i := range a.Ingredients {
 			if i.Namespace == namespace {