Update README

README.md

@@ -1,26 +1,52 @@
-bean
-=====
+# bean
 
-A rebar plugin
+bean is a Rebar3 plugin that automatically generates a supervision tree based on dependencies between processes. With this plugin, you can automatically generate a supervision tree that satisfies the following requirements simply by running this:
 
-Build
------
+- The number of processes restarted at one time is minimal.
+- All processes that depend on the terminated process are restarted.
 
-    $ rebar3 compile
+Dependencies between processes are defined as the directions of communication between processes. For example, if process $p_1$ sends a message to process $p_2$, then "$`p_2`$ is dependent on $p_1$".
 
-Use
----
+## Use
 
-Add the plugin to your rebar config:
+Add this plugin to your `rebar.config`:
 
-    {plugins, [
-        {bean, {git, "https://host/user/bean.git", {tag, "0.1.0"}}}
-    ]}.
+```erlang
+{plugins, [
+    {bean, {git, "https://github.com/ajfAfg/bean.git", {tag, "0.1.0"}}}
+]}.
+```
 
-Then just call your plugin directly in an existing application:
+Then just call the plugin directly in an existing application:
 
+```sh
+$ rebar3 bean
+===> Fetching bean
+===> Compiling bean
+<Plugin Output>
+```
 
-    $ rebar3 bean
-    ===> Fetching bean
-    ===> Compiling bean
-    <Plugin Output>
+See [the demo project](./demo) for a complete example of this plugin.
+
+## Specifications
+
+- The supervision tree supervise the processes defined under the floor of `src` directory.
+- The supervisor source codes are output to `src/bean` directory.
+- The name of the root in the supervision tree is `bean`.
+- Supported restart strategies are `one_for_one`, `one_for_all`, and `rest_for_one` only.
+  - i.e. `simple_one_for_one` is not supported.
+
+## Limitations
+
+Currently, bean has the following limitations:
+
+- Only supports gen_server processes.
+- Only `gen_server:call/2,3` and `gen_server:cast/2` communications are supported.
+- Extractable communications are only those at the top level of the scope of each callback function of the module that implements gen_server.
+  - It is also assumed that the first argument of each communication function is a literal representing the name of the gen_server.
+
+## More information
+
+The supervision tree generation algorithm implemented in this plugin is proven to output a certain optimal tree. In addition, experimental results show that the algorithm is fast enough for many realistic cases, although it takes the worst-case exponential time. See the master's thesis "[Automatic Generation of an Optimal Supervision Tree in Erlang]()" for details.
+
+TODO: Add the link to the thesis when it is published.