Use DeleteBuildpack method

- Add buildpack.toml.tmpl file to allow version templating
[#166793497]

Co-authored-by: Chhavi Kankaria <ckankaria@pivotal.io>

Author: dfreilich

buildpack.toml.tmpl

@@ -0,0 +1,28 @@
+
+[buildpack]
+id = "org.cloudfoundry.yarn"
+name = "Yarn Buildpack"
+version = "{{ .Version }}"
+
+[metadata]
+include_files = ["bin/build","bin/detect","buildpack.toml"]
+pre_package = "./scripts/build.sh"
+
+[metadata.default_versions]
+yarn = "1.16.0"
+
+[[metadata.dependencies]]
+id = "yarn"
+name = "Yarn"
+sha256 = "df202627d9a70cf09ef2fb11cb298cb619db1b958590959d6f6e571b50656029"
+source = "https://github.com/yarnpkg/yarn/releases/download/v1.16.0/yarn-v1.16.0.tar.gz"
+source_sha256 = "df202627d9a70cf09ef2fb11cb298cb619db1b958590959d6f6e571b50656029"
+stacks = ["org.cloudfoundry.stacks.cflinuxfs3","io.buildpacks.stacks.bionic"]
+uri = "https://buildpacks.cloudfoundry.org/dependencies/yarn/yarn-1.16.0-any-stack-df202627.tar.gz"
+version = "1.16.0"
+
+[[stacks]]
+id = "org.cloudfoundry.stacks.cflinuxfs3"
+
+[[stacks]]
+id = "io.buildpacks.stacks.bionic"

integration/integration_test.go

@@ -2,7 +2,6 @@ package integration
 
 import (
 	"fmt"
-	"os"
 	"path/filepath"
 	"testing"
 
@@ -27,11 +26,11 @@ func TestIntegration(t *testing.T) {
 	Expect(err).NotTo(HaveOccurred())
 	yarnURI, err = dagger.PackageBuildpack(bpDir)
 	Expect(err).ToNot(HaveOccurred())
-	defer os.RemoveAll(yarnURI)
+	defer dagger.DeleteBuildpack(yarnURI)
 
 	nodeURI, err = dagger.GetLatestBuildpack("node-engine-cnb")
 	Expect(err).ToNot(HaveOccurred())
-	defer os.RemoveAll(nodeURI)
+	defer dagger.DeleteBuildpack(nodeURI)
 
 	spec.Run(t, "Integration", testIntegration, spec.Report(report.Terminal{}))
 }