Merge pull request #210 from paketo-buildpacks/detect-logging

Adds detection logging messages at info level

cmd/main/main.go

@@ -26,8 +26,9 @@ import (
 )
 
 func main() {
+	logger := bard.NewLogger(os.Stdout)
 	libpak.Main(
-		executable.Detect{},
-		executable.Build{Logger: bard.NewLogger(os.Stdout)},
+		executable.Detect{Logger: logger},
+		executable.Build{Logger: logger},
 	)
 }

executable/detect.go

@@ -22,6 +22,7 @@ import (
 	"github.com/buildpacks/libcnb"
 	"github.com/paketo-buildpacks/libjvm"
 	"github.com/paketo-buildpacks/libpak"
+	"github.com/paketo-buildpacks/libpak/bard"
 )
 
 const (
@@ -32,10 +33,12 @@ const (
 	PlanEntrySyft                  = "syft"
 )
 
-type Detect struct{}
+type Detect struct{
+	Logger bard.Logger
+}
 
 func (d Detect) Detect(context libcnb.DetectContext) (libcnb.DetectResult, error) {
-	cr, err := libpak.NewConfigurationResolver(context.Buildpack, nil)
+	cr, err := libpak.NewConfigurationResolver(context.Buildpack, &d.Logger)
 	if err != nil {
 		return libcnb.DetectResult{}, fmt.Errorf("unable to create configuration resolver\n%w", err)
 	}
@@ -63,6 +66,7 @@ func (d Detect) Detect(context libcnb.DetectContext) (libcnb.DetectResult, error
 	}
 
 	if _, ok := m.Get("Main-Class"); ok {
+		d.Logger.Info("PASSED: 'Main-Class' manifest attribute found")
 		result.Plans[0].Provides = append(result.Plans[0].Provides, libcnb.BuildPlanProvide{Name: PlanEntryJVMApplicationPackage})
 	}