Merge branch 'feat/config-file' of https://github.com/fintechstudios/angular-http-server into fintechstudios-feat/config-file

Author: Simon Hampton

README.md

@@ -1,6 +1,6 @@
 # Single Page App dev-server
 
-A simple dev-server designed for Single Page App (SPA) developers. **`angular-http-server` is not, and makes no claims to be, a production server.** 
+A simple dev-server designed for Single Page App (SPA) developers. **`angular-http-server` is not, and makes no claims to be, a production server.**
 
 It returns a file if it exists (ex. your-icon.png, index.html), routes all other requests to index.html (rather than giving a 404 error) so that you SPO's routing can take over. The only time it will error out is if it can't locate the index.html file.
 
@@ -52,8 +52,41 @@ Disable logging
 angular-http-server --silent
 ```
 
+All options can be specified by a config file, optionally read via `--config` flag.
+CLI options take precedence over any options read from the config file.
+```sh
+angular-http-server --config configs/angular-http-server.config.js
+```
+
 Feedback via: https://github.com/simonh1000/angular-http-server
 
+## Config File
+The config file can either export an object of parameters, or a function that will be passed in the parsed `argv` from minimalist.
+
+Simple example:
+```js
+module.exports = {
+    p: 8081,
+    cors: true,
+    silent: true,
+};
+```
+
+Complicated example:
+```js
+module.exports = (argv) => {
+    const config = {
+        cors: true,
+    };
+
+    if (argv.p === 443) {
+        config.ssl = true;
+    }
+
+    return config;
+};
+```
+
 ## Self-Signed HTTPS Use
 
 #### Production

angular-http-server.js

@@ -16,6 +16,26 @@ var server;
 const NO_PATH_FILE_ERROR_MESSAGE = "Error: index.html could not be found in the specified path ";
 const NO_ROOT_FILE_ERROR_MESSAGE = "Error: Could not find index.html within the working directory.";
 
+
+if (argv.config) {
+  let configPath;
+  if (path.isAbsolute(argv.config)) {
+    configPath = argv.config;
+  } else {
+    configPath = path.join(process.cwd(), argv.config);
+  }
+  const getConfig = require(configPath);
+  let config;
+  if (typeof getConfig === 'function') {
+      config = getConfig(argv);
+  } else {
+      config = getConfig;
+  }
+
+  // supplement argv with config, but CLI args take precedence
+  argv = Object.assign({}, config, argv);
+}
+
 // As a part of the startup - check to make sure we can access index.html
 returnDistFile(true);