update README.md

Author: minefuto

README.md

@@ -1,5 +1,6 @@
 # tp - Transparent Pipeline
-![GitHub](https://img.shields.io/github/license/minefuto/tp?style=for-the-badge)
+![build](https://img.shields.io/github/workflow/status/minefuto/tp/build?style=for-the-badge)
+![license](https://img.shields.io/github/license/minefuto/tp?style=for-the-badge)
 
 This is a tool that interactively previews the command's stdin/stdout.
 
@@ -11,33 +12,53 @@ $ go install
 ```
 
 ## Usage
-### 1. stdin/stdout mode  
+### 1. commandline mode  
 <img src="https://github.com/minefuto/tp/blob/main/gif/mode1.gif">
 
-### 2. commandline mode  
-<img src="https://github.com/minefuto/tp/blob/main/gif/mode2.gif">
-
 Add the following to shell's config file.  
+`<key>`: Specify any key.  
+**Bash(`.bashrc`)**
+```
+function transparent-pipeline() {
+  READLINE_LINE=$(tp -c "${READLINE_LINE}|")
+  READLINE_POINT=${#READLINE_LINE}
+}
+bind -x '"<key>": transparent-pipeline'
+```
 **Zsh(`.zshrc`)**
 ```
 function transparent-pipeline() {
-  BUFFER="$(tp -c $BUFFER)"
+  BUFFER="$(tp -c "${BUFFER}|")"
   CURSOR=$#BUFFER
 }
 zle -N transparent-pipeline
-bindkey '^t' transparent-pipeline
+bindkey "<key>" transparent-pipeline
 ```
-
 **Fish(`config.fish`)**
 ```
 function transparent-pipeline
   commandline | read -l buffer
-  commandline (tp -c "$buffer")
+  commandline -r (tp -c "$buffer|")
+  commandline -f repaint
 end
 function fish_user_key_bindings
-  bind \ct transparent-pipeline
+  bind "<key>" transparent-pipeline
 end
 ```
 
+### 2. stdin/stdout mode  
+<img src="https://github.com/minefuto/tp/blob/main/gif/mode2.gif">
+
+## Options
+```
+> tp -h
+Usage of tp:
+  -c, --command        Return commandline text (Please see the "1. commandline mode")
+  -h, --help           Show help
+      --horizontal     Split the view horizontally
+  -s, --shell string   Specify the shell to use (default "$SHELL")
+  -v, --version        Show version
+```
+
 ## Supported OS
 macOS, Linux