Add support for F# and set dotnet docket image to 1.0.1-projectjson (#409)

examples/hash/.gitignore

@@ -1,3 +0,0 @@
-dotnet.*
-func.yaml
-project.lock.json

examples/hash/README.md

@@ -18,6 +18,12 @@ fn init <username>/<funcname>
 
 This will create the ```func.yaml``` file required by functions, which can be built by running:
 
+
+## Build the function docker image
+```bash
+fn build
+```
+
 ## Push to docker
 ```bash
 fn push

examples/hash/fsharp/func.fs

@@ -0,0 +1,39 @@
+open System
+open System.IO
+open System.Security.Cryptography
+
+let createChecksum (data:byte array) =
+    use md5 = MD5.Create ()
+    let hash = data |> md5.ComputeHash
+    BitConverter.ToString(hash).Replace("-", "").ToLower ()
+
+let downloadRemoteImageFile uri =
+    async {
+        let req = System.Net.HttpWebRequest.Create (System.Uri (uri)) :?> System.Net.HttpWebRequest
+        let! res = req.AsyncGetResponse ()
+        let stm = res.GetResponseStream ()
+        use ms = new MemoryStream ()
+        stm.CopyTo(ms)
+        return ms.ToArray ()
+    }
+
+[<EntryPoint>]
+let main argv =
+    let isPipedInput =
+        try
+            Console.KeyAvailable |> ignore
+            false
+        with
+        | _ -> true
+
+    match isPipedInput with
+    | true ->
+        let input = stdin
+        async {
+            let! uri = input.ReadToEndAsync () |> Async.AwaitTask
+            return! downloadRemoteImageFile uri
+        } |> Async.RunSynchronously
+        |> createChecksum
+        |> printfn "%s"
+    | false -> () // if nothing is being piped in, then exit
+    0

examples/hash/fsharp/project.json

@@ -0,0 +1,27 @@
+{
+  "version": "1.0.0-*",
+  "buildOptions": {
+    "debugType": "portable",
+    "emitEntryPoint": true,
+    "compilerName": "fsc",
+    "compile": {
+      "includeFiles": [
+        "func.fs"
+      ]
+    }
+  },
+  "tools": {
+    "dotnet-compile-fsc": "1.0.0-preview2.1-*"
+  },
+  "frameworks": {
+    "netcoreapp1.1": {
+      "dependencies": {
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.1.0"
+        },
+        "Microsoft.FSharp.Core.netcore": "1.0.0-alpha-160629"
+      }
+    }
+  }
+}

fn/init.go

@@ -29,6 +29,7 @@ var (
 		".py": "python",
 		".rs": "rust",
 		".cs": "dotnet",
+		".fs": "dotnet",
 	}
 
 	fnInitRuntimes []string

fn/langs/dotnet.go

@@ -26,7 +26,7 @@ func (lh *DotNetLangHelper) PreBuild() error {
 	cmd := exec.Command(
 		"docker", "run",
 		"--rm", "-v",
-		wd+":/dotnet", "-w", "/dotnet", "microsoft/dotnet",
+		wd+":/dotnet", "-w", "/dotnet", "microsoft/dotnet:1.0.1-sdk-projectjson",
 		"/bin/sh", "-c", "dotnet restore && dotnet publish -c release -b /tmp -o .",
 	)
 	cmd.Stderr = os.Stderr