Spec Updates

This change updates the library to match upcoming spec changes.  It adds the
Platform to Detect, updates the Detect logger to use stdout, updates Detect's
build plan output to write to <platform>/plan, and updates Build to allow
claims on build plan dependencies via <platform>/plan.

[buildpacks/spec#27]

Signed-off-by: Ben Hale <bhale@pivotal.io>

README.md

@@ -1,5 +1,5 @@
-# `libjavabuildpack`
-`libjavabuildpack` is a Go library with useful functionality for building Java Buildpack-related buildpacks.
+# `libcfbuildpack`
+`libcfbuildpack` is a Go library with useful functionality for building Cloud Foundry-related buildpacks.
 
 ## License
 This library is released under version 2.0 of the [Apache License][a].

build.go

@@ -16,51 +16,51 @@
 
 package libjavabuildpack
 
-import (
-	"fmt"
-
-	"github.com/buildpack/libbuildpack"
-)
-
-// Build is an extension to libbuildpack.Build that allows additional functionality to be added.
-type Build struct {
-	libbuildpack.Build
-
-	// Buildpack represents the metadata associated with a buildpack.
-	Buildpack Buildpack
-
-	// Cache represents the cache layers contributed by a buildpack.
-	Cache Cache
-
-	// Launch represents the launch layers contributed by the buildpack.
-	Launch Launch
-
-	// Logger is used to write debug and info to the console.
-	Logger Logger
-}
-
-// String makes Build satisfy the Stringer interface.
-func (b Build) String() string {
-	return fmt.Sprintf("Build{ Build: %s, Buildpack: %s, Cache: %s, Logger: %s }",
-		b.Build, b.Buildpack, b.Cache, b.Logger)
-}
-
-// DefaultBuild creates a new instance of Build using default values.
-func DefaultBuild() (Build, error) {
-	b, err := libbuildpack.DefaultBuild()
-	if err != nil {
-		return Build{}, err
-	}
-
-	logger := Logger{b.Logger}
-	buildpack := NewBuildpack(b.Buildpack)
-	cache := Cache{b.Cache, buildpack.CacheRoot, logger}
-
-	return Build{
-		b,
-		buildpack,
-		cache,
-		Launch{b.Launch, cache, logger},
-		logger,
-	}, nil
-}
+// import (
+// 	"fmt"
+//
+// 	"github.com/buildpack/libbuildpack"
+// )
+//
+// // Build is an extension to libbuildpack.Build that allows additional functionality to be added.
+// type Build struct {
+// 	libbuildpack.Build
+//
+// 	// Buildpack represents the metadata associated with a buildpack.
+// 	Buildpack Buildpack
+//
+// 	// Cache represents the cache layers contributed by a buildpack.
+// 	Cache Cache
+//
+// 	// Launch represents the launch layers contributed by the buildpack.
+// 	Launch Launch
+//
+// 	// Logger is used to write debug and info to the console.
+// 	Logger Logger
+// }
+//
+// // String makes Build satisfy the Stringer interface.
+// func (b Build) String() string {
+// 	return fmt.Sprintf("Build{ Build: %s, Buildpack: %s, Cache: %s, Logger: %s }",
+// 		b.Build, b.Buildpack, b.Cache, b.Logger)
+// }
+//
+// // DefaultBuild creates a new instance of Build using default values.
+// func DefaultBuild() (Build, error) {
+// 	b, err := libbuildpack.DefaultBuild()
+// 	if err != nil {
+// 		return Build{}, err
+// 	}
+//
+// 	logger := Logger{b.Logger}
+// 	buildpack := NewBuildpack(b.Buildpack)
+// 	cache := Cache{b.Cache, buildpack.CacheRoot, logger}
+//
+// 	return Build{
+// 		b,
+// 		buildpack,
+// 		cache,
+// 		Launch{b.Launch, cache, logger},
+// 		logger,
+// 	}, nil
+// }