update README.md

Author: minefuto

README.md

@@ -1,62 +1,105 @@
-# Transparent Pipe : A terminal-based pipeline command
+# Transparent Pipe(tp)
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-This is a terminal-based application for interactively previews the stdin/stdout around the pipeline.
+This project is inspired by [akavel/up](https://github.com/akavel/up).  
+`tp` is a terminal-based application for display the result of the command in real-time with each keystroke.  
 
-## Installation
-```
-$ git clone https://github.com/minefuto/tp.git
-$ cd tp
-$ make install
-```
+It provides two displays.  
+1. the input passed from last pipeline.  
+2. the output of the command currently being typed.  
 
-## Usage
-### 1. commandline mode  
-<img src="https://github.com/minefuto/tp/blob/main/gif/mode1.gif">
+You can consider the next commands while watching the input passed from pipeline.  
+These will help you create complex commands including pipelines for get the ideal output with try and error.  
+<br>
+Please type <kbd>Enter</kbd> when you completed to create command in `tp`.  
+Then, `tp` returns the full result of the command as stdout/stderr.  
 
-Add the following to shell's config file.  
-`<key>`: Specify any key.  
-**Bash(`.bashrc`)**
+<img src="https://github.com/minefuto/tp/blob/main/gif/tp.gif">
+
+Also, `tp` can collaborate with the shell.  
+By typing a shortcut key, you can start `tp` by capturing the command being typed into shell.  
+And the command being typed into `tp` return to shell when type <kbd>Enter</kbd>.  
+
+<img src="https://github.com/minefuto/tp/blob/main/gif/tp-shell.gif">
+
+If you want to collaborate with the shell, please add the following to shell's config file.  
+`<key>`: Specify any shortcut key.  
+
+Bash
 ```
 function transparent-pipe() {
-  READLINE_LINE=$(tp -c "${READLINE_LINE}|")
+  READLINE_LINE=$(tp -c "${READLINE_LINE}")
   READLINE_POINT=${#READLINE_LINE}
 }
 bind -x '"<key>": transparent-pipe'
 ```
-**Zsh(`.zshrc`)**
+Zsh
 ```
 function transparent-pipe() {
-  BUFFER="$(tp -c "${BUFFER}|")"
+  BUFFER="$(tp -c "${BUFFER}")"
   CURSOR=$#BUFFER
 }
 zle -N transparent-pipeline
 bindkey "<key>" transparent-pipe
 ```
-**Fish(`config.fish`)**
+Fish
 ```
 function transparent-pipe
   commandline | read -l buffer
-  commandline -r (tp -c "$buffer|")
+  commandline -r (tp -c "$buffer")
   commandline -f repaint
 end
 function fish_user_key_bindings
   bind "<key>" transparent-pipe
 end
 ```
+<br>
+
+**Warning!!!**  
+`tp` executes the command being typed with each keystroke. There is possibility to execute dangerous commands.  
+So, create/delete operations(such as `mkdir`, `rm`) should not be typed because you might execute a careless command.  
+`tp` is not designed for such operations.  
+
+But I'm afraid of typo.  
+`tp` provides a feature of prevent execution a specific commands.  
+Please create block command list in `$TP_BLOCK_COMMAND` with `:` as delimiter. For example,  
+```
+export TP_BLOCK_COMMAND='mkdir:rmdir:rm:mv'
+```
+Also, disable keystroke of redirection(`<`, `>`) in `tp` for the same reason.  
+
+## Installation
+This steps will install to `$GOPATH/bin`.
+```
+$ git clone https://github.com/minefuto/tp.git
+$ cd tp
+$ make install
+```
 
-### 2. stdin/stdout mode  
-<img src="https://github.com/minefuto/tp/blob/main/gif/mode2.gif">
+## Keybindings
+| operation                                 | key                                      |
+|-------------------------------------------|------------------------------------------|
+| Move left(one char)                       | <kbd>←</kbd> / <kbd>Ctrl-B</kbd>         |
+| Move right(one char)                      | <kbd>→</kbd> / <kbd>Ctrl-F</kbd>         |
+| Move left(one word)                       | <kbd>Alt←</kbd> / <kbd>Alt-B</kbd>       |
+| Move right(one word)                      | <kbd>Alt→</kbd> / <kbd>Alt-F</kbd>       |
+| Move begin of the line                    | <kbd>Home</kbd> / <kbd>Ctrl-A</kbd>      |
+| Move end of the line                      | <kbd>End</kbd> / <kbd>Ctrl-E</kbd>       |
+| Delete one char before the cursor         | <kbd>Backspace</kbd> / <kbd>Ctrl-H</kbd> |
+| Delete one char after the cursor          | <kbd>Delete</kbd> / <kbd>Ctrl-D</kbd>    |
+| Delete one word before the cursor         | <kbd>Ctrl-W</kbd>                        |
+| Delete from the cursor to end of the line | <kbd>Ctrl-K</kbd>                        |
+| Delete all line                           | <kbd>Ctrl-U</kbd>                        |
 
 ## Options
 ```
 > tp -h
 Usage of tp:
-  -c, --command        Return commandline text (Please see the "1. commandline mode")
+  -c, --command        Return commandline text (for collaborate with the shell)
   -h, --help           Show help
       --horizontal     Split the view horizontally
   -s, --shell string   Specify the shell to use (default "$SHELL")