Add .NET buildpack (#571)

.github/workflows/build-test-publish.yml

@@ -69,14 +69,16 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        language: ["go", "gradle", "java", "node-js", "php", "python", "ruby", "scala"]
+        language: ["dotnet", "go", "gradle", "java", "node-js", "php", "python", "ruby", "scala"]
         builder: ["builder-20", "builder-22", "builder-24"]
         arch: ["amd64", "arm64"]
         exclude:
           - builder: builder-20
             arch: arm64
           - builder: builder-22
             arch: arm64
+          - builder: builder-20
+            language: dotnet
 
     steps:
       - name: Checkout getting started guide

README.md

@@ -23,6 +23,7 @@ in each base image, see [this Dev Center article](https://devcenter.heroku.com/a
 | [heroku/builder:24][builder-tags] | Ubuntu 24.04 | AMD64 + ARM64           | [heroku/heroku:24][heroku-tags]     | 0.20.1            | Recommended |
 
 The builder images above include buildpack support for the following languages: Go, Java, Node.js, PHP, Python, Ruby & Scala.
+Additionally, `heroku/builder:22` and `heroku/builder:24` includes buildpack support for .NET applications.
 
 Check the [lifecycle API version support matrix](https://github.com/buildpacks/lifecycle#supported-apis) to determine
 which Platform and Buildpack API versions are compatible with the `lifecycle` version included in each builder.
@@ -52,6 +53,7 @@ pack config default-builder heroku/builder:24
 
 For language/buildpack-specific bugs or feature requests, file an issue against the appropriate buildpack repository:
 
+- https://github.com/heroku/buildpacks-dotnet
 - https://github.com/heroku/buildpacks-go
 - https://github.com/heroku/buildpacks-jvm
 - https://github.com/heroku/buildpacks-nodejs

builder-22/builder.toml

@@ -1,4 +1,4 @@
-description = "Ubuntu 22.04 AMD64 base image with buildpacks for Go, Java, Node.js, PHP, Python, Ruby & Scala."
+description = "Ubuntu 22.04 AMD64 base image with buildpacks for .NET, Go, Java, Node.js, PHP, Python, Ruby & Scala."
 
 [stack]
 id = "heroku-22"
@@ -17,6 +17,10 @@ mirrors = ["public.ecr.aws/heroku/heroku:22-cnb"]
 [lifecycle]
 version = "0.20.1"
 
+[[buildpacks]]
+  id = "heroku/dotnet"
+  uri = "docker://docker.io/heroku/buildpack-dotnet@sha256:0ff6cbece898f615c70e129058f8ef88c94fea8ed2f5cf210606ce5ed924d171"
+
 [[buildpacks]]
   id = "heroku/go"
   uri = "docker://docker.io/heroku/buildpack-go@sha256:69ccc6af465bcb3f7a131f3f15ebc975c73f17e33d4216162bd6a52811f7e114"
@@ -123,3 +127,12 @@ version = "0.20.1"
     id = "heroku/procfile"
     version = "3.1.2"
     optional = true
+
+[[order]]
+  [[order.group]]
+    id = "heroku/dotnet"
+    version = "0.1.2"
+  [[order.group]]
+    id = "heroku/procfile"
+    version = "3.1.2"
+    optional = true

builder-24/builder.toml

@@ -1,4 +1,4 @@
-description = "Ubuntu 24.04 AMD64+ARM64 base image with buildpacks for Go, Java, Node.js, PHP, Python, Ruby & Scala."
+description = "Ubuntu 24.04 AMD64+ARM64 base image with buildpacks for .NET, Go, Java, Node.js, PHP, Python, Ruby & Scala."
 
 [stack]
 id = "heroku-24"
@@ -17,6 +17,10 @@ image = "docker.io/heroku/heroku:24-build"
 image = "docker.io/heroku/heroku:24"
 mirrors = ["public.ecr.aws/heroku/heroku:24"]
 
+[[buildpacks]]
+  id = "heroku/dotnet"
+  uri = "docker://docker.io/heroku/buildpack-dotnet@sha256:0ff6cbece898f615c70e129058f8ef88c94fea8ed2f5cf210606ce5ed924d171"
+
 [[buildpacks]]
   id = "heroku/go"
   uri = "docker://docker.io/heroku/buildpack-go@sha256:69ccc6af465bcb3f7a131f3f15ebc975c73f17e33d4216162bd6a52811f7e114"
@@ -123,3 +127,12 @@ mirrors = ["public.ecr.aws/heroku/heroku:24"]
     id = "heroku/procfile"
     version = "3.1.2"
     optional = true
+
+[[order]]
+  [[order.group]]
+    id = "heroku/dotnet"
+    version = "0.1.2"
+  [[order.group]]
+    id = "heroku/procfile"
+    version = "3.1.2"
+    optional = true