Merge pull request #7 from note/add-more-readme

README improvements

Author: note

README.md

@@ -1,17 +1,86 @@
+[![Build Status](https://travis-ci.com/note/teleport-scala.svg?branch=master)](https://travis-ci.org/note/teleport-scala)
+[![GitHub release](https://img.shields.io/github/v/release/note/teleport-scala.svg)](https://github.com/note/teleport-scala/releases/)
+
 # teleport-scala
 
-[teleport](https://github.com/bollu/teleport) rewritten in Scala as a showcase that writing native CLIs in Scala
+A clone of [teleport](https://github.com/bollu/teleport) written in Scala as a showcase that writing native CLIs in Scala
 might not be such a bad idea.
 
 [![asciicast](https://asciinema.org/a/Zj1ZDAgF02PP3JpD5RNtwBz0M.svg)](https://asciinema.org/a/Zj1ZDAgF02PP3JpD5RNtwBz0M)
 
-`goto` command cannot be fully implemented in subprocess. `teleport-scala goto point` executable will return
-status code 2 after printing the absolute path of the `point` (if `point` is registered teleport point). It's not 
-possible for the `teleport-scala` to change current directory of the caller process. The solution for that
-is to have a bash function sourced. That function can use absolute path returned by `teleport scala`.
+## How to build teleport-scala
+
+You should have following on your `$PATH`:
+
+* Java JDK 11
+* `sbt`
+* `native-image`
+
+You can consult file `.travis.yml` in case of difficulties in installing prerequisites. Once you have everything installed
+you can:
+
+```
+./build.sh
+```
+
+As a result `teleport-scala.jar` and executable `teleport-scala` should be created.
+
+## Bring `tp` into scope
+
+If you watched the asciiname animation you may have noticed that it uses `tp` command as opposed to `teleport-scala`.
+T bring `tp` into scope add the following to your `.zshrc`/`.bashrc`:
+
+```
+source /your/path/to/teleport-scala/teleport.sh
+```
+
+### For curious - what's the point of having `teleport-scala` and `tp`?
+
+The problem is that `goto` command cannot be fully implemented in a subprocess; it's not possible for the 
+`teleport-scala` to change working directory of the caller process. Therefore, `teleport-scala goto point` returns
+status code 2 and prints the absolute path of the `point`. As bash function `fp` is sourced it can change the working 
+directory.
+ 
+If that sounds vague to you just read `teleport.sh` file - it's just a few lines of code.  
+
+## Usage
+
+```
+> tp --help
+Usage:
+    teleport-scala [--no-colors] [--no-headers] add
+    teleport-scala [--no-colors] [--no-headers] list
+    teleport-scala [--no-colors] [--no-headers] remove
+    teleport-scala [--no-colors] [--no-headers] goto
+    teleport-scala [--no-colors] [--no-headers] version
+
+teleport: A tool to quickly switch between directories
+
+Options and flags:
+    --help
+        Display this help text.
+    --no-colors
+        Disable ANSI color codes
+    --no-headers
+        Disable printing headers for tabular data
+
+Subcommands:
+    add
+        add a teleport point
+    list
+        list all teleport points
+    remove
+        remove a teleport point
+    goto
+        go to a created teleport point
+    version
+        display version
+```
+
+## Running smoke-test
 
-In `.zshrc`/`.bashrc`:
+You need to build the project first. If it's built then:
 
 ```
-source /path/to/teleport-scala/teleport.sh
-```  
+./smoke-test.sh
+```