Added procfile to buildpack.yml & modified script to generate a build…

…pack package correctly.

buildpack.toml

@@ -3,7 +3,7 @@ api = "0.2"
 [buildpack]
   id = "com.mikusa.rust"
   name = "Rust Build Pack"
-  version = "0.0.3"
+  version = "0.0.4"
   homepage = "https://github.com/dmikusa/rust-cnb"
 
 [metadata]
@@ -28,6 +28,10 @@ api = "0.2"
     source_sha256 = "c31008d42861c62818622d8463211eab32cbc51cd2bd43730e0781bb334730f7"
     stacks = ["io.paketo.stacks.tiny", "io.buildpacks.stacks.bionic", "org.cloudfoundry.stacks.cflinuxfs3"]
 
+  [[metadata.dependencies]]
+    id = "paketo-buildpacks/procfile"
+    image = "gcr.io/paketo-buildpacks/procfile:1.3.8"
+
 [[order]]
 
   [[order.group]]
@@ -36,4 +40,9 @@ api = "0.2"
 
   [[order.group]]
     id = "com.mikusa.rust-cargo"
-    version="0.0.2"
+    version="0.0.2"
+
+  [[order.group]]
+    id = "paketo-buildpacks/procfile"
+    version="1.3.8"
+    optional = true

scripts/package.sh

@@ -131,7 +131,7 @@ function buildpackage::toml::write() {
   echo "-> Generating package config in ${BUILD_DIR}/package.toml..."
 
   yj -tj < "${ROOT_DIR}/buildpack.toml" \
-    | jq -r '.metadata.dependencies[] | select(.id != "lifecycle") | {uri: .uri }' \
+    | jq -r '.metadata.dependencies[] | select(.id != "lifecycle") | {uri: .uri, image: .image}' \
     | jq -s --arg uri "${BUILD_DIR}/buildpack.tgz" '. | {buildpack: {uri: $uri}, dependencies: .}' \
     | yj -jt \
     > "${BUILD_DIR}/package.toml"