Added the "hello" to the example, added badges to README (#5)

* modified action signature and changed example action

* format code

* changed response error message for action loop

* change error msg

* refactored error messages

* Update README.md

* updated the example

* badges - closes #1

* ops

Author: sciabarracom

README.md

@@ -1,13 +1,17 @@
 # incubator-openwhisk-runtime-rust
 
 Work in Progress! Do not use yet...
+It will be awesome.
 
+[![License](https://img.shields.io/badge/license-Apache--2.0-blue.svg)](http://www.apache.org/licenses/LICENSE-2.0)
+[![Build Status](https://travis-ci.org/apache/incubator-openwhisk-runtime-rust.svg?branch=master)](https://travis-ci.org/apache/incubator-openwhisk-runtime-rust)
 
 # Work Done
 
 - implemented the actionloop
 - implemented the Docker image
 - implemented the action compiler
+- refactored to a more rustacean form
 
 # Work to do
 

example/hello/Cargo.toml

@@ -2,7 +2,9 @@
 name = "actions"
 version = "0.1.0"
 authors = ["Roberto Diaz <roberto@theagilemonkeys.com>"]
+edition = "2018"
 
 [dependencies]
 serde_json = "1.0"
-
+serde = "1.0"
+serde_derive = "1.0"

example/hello/src/lib.rs

@@ -1,16 +1,27 @@
 extern crate serde_json;
 
-use std::collections::HashMap;
-use serde_json::Value;
+use serde_derive::{Deserialize, Serialize};
+use serde_json::{Error, Value};
 
-pub fn main(args: HashMap<String, Value>) -> HashMap<String, Value> {
-    let name_opt = args.get("name");
-    let name = if name_opt.is_some() {
-        name_opt.unwrap().as_str().unwrap()    
-    } else {
-        "stranger"
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
+struct Input {
+    #[serde(default = "stranger")]
+    name: String,
+}
+
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
+struct Output {
+    greeting: String,
+}
+
+fn stranger() -> String {
+    "stranger".to_string()
+}
+
+pub fn main(args: Value) -> Result<Value, Error> {
+    let input: Input = serde_json::from_value(args)?;
+    let output = Output {
+        greeting: format!("Hello, {}", input.name),
     };
-    let mut out = HashMap::new();
-    out.insert("greeting".to_string(), Value::String(format!("Hello, {}", name)));
-    out
+    serde_json::to_value(output)
 }

rust1.32/compile

@@ -43,9 +43,13 @@ def copy_replace(src, dst, match=None, replacement=""):
 cargo_action = """[package]
 name = "actions"
 version = "0.1.0"
+authors = ["Roberto Diaz <roberto@theagilemonkeys.com>"]
+edition = "2018"
 
 [dependencies]
 serde_json = "1.0"
+serde = "1.0"
+serde_derive = "1.0"
 """
 
 def build(tgt_dir):