Merge pull request HarshCasper#706 from avinal/add-custom-prompt

Add custom prompt script for Bash

Bash/Custom_Prompt/README.md

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+# Custom Command Prompt on Bash
+
+[![Bash Shell](https://img.shields.io/static/v1?label=MADE%20WITH&message=BASH&color=red&style=for-the-badge&logo=gnu-bash)](https://shields.io/)
+[![Linux](https://img.shields.io/static/v1?label=MADE%20FOR&message=LINUX&color=red&style=for-the-badge&logo=linux)](https://shields.io/)
+
+By default Bash command prompts are boring and show no extra information. You can tweak your command prompt to show a variety of information such as `git` and virtual environment, command execution time, previous command status, current directory, SSH session and many more can be added.
+
+## Prerequisite
+
+You must have `git` installed in order to use this script. If you haven't already follow the step below
+
+```bash
+    sudo apt-get update && sudo apt-get install -y git
+```
+
+## Setup Instructions
+
+- Open your `.bashrc` in `nano` or `vim` or any editor of your choice.
+
+```bash
+    sudo nano ~/.bashrc
+```
+
+- Goto the last of your `.bashrc` and paste everything from the file [custom_prompt.sh](custom_prompt.sh). *Do not change anything else until you know. You can however customise the colors of your choice*
+
+- Save your `.bashrc` and exit
+
+```bash
+    # for nano
+    CTRL + O
+    CTRL +X
+
+    # for vim
+    :w
+    :q
+```
+
+- Run the following command to load new configuration.
+
+```bash
+    source ~/.bashrc
+```
+
+## Author(s)
+
+Made by [Avinal Kumar](https://github.com/avinal)

Bash/Custom_Prompt/custom_prompt.sh

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+
+# colors - you may add more colors
+WHITE='\[\033[1;37m\]'
+LIGHTGRAY='\[\033[0;37m\]'
+GRAY='\[\033[1;30m\]'
+BLACK='\[\033[0;30m\]'
+RED='\[\033[0;31m\]'
+LIGHTRED='\[\033[1;31m\]'
+GREEN='\[\033[0;32m\]'
+LIGHTGREEN='\[\033[1;32m\]'
+BROWN='\[\033[0;33m\]'
+YELLOW='\[\033[1;33m\]'
+BLUE='\[\033[0;34m\]'
+LIGHTBLUE='\[\033[1;34m\]'
+PURPLE='\[\033[0;35m\]'
+PINK='\[\033[1;35m\]' 
+CYAN='\[\033[0;36m\]'
+LIGHTCYAN='\[\033[1;36m\]'
+DEFAULT='\[\033[0m\]'
+VIOLET='\[\033[01;35m\]'
+
+# change colors for different components here
+cARROW=$VIOLET
+cLINES=$GRAY #Lines and Arrow
+cBRACKETS=$GRAY # Brackets around each data item
+cERROR=$LIGHTRED # Error block when previous command did not return 0
+cSUCCESS=$GREEN  # When last command ran successfully and return 0
+cTIME=$LIGHTGRAY # The current time
+cUSR=$LIGHTBLUE # Color of user
+cUHS=$CYAN # Color of the user and hostname separator, probably '@'
+cSSH=$PINK # Color for brackets if session is an SSH session
+cHST=$LIGHTGREEN # Color of hostname
+cRWN=$RED # Color of root warning
+cPWD=$BLUE # Color of current directory
+cCMD=$DEFAULT # Color of the command you type
+
+# seperator, default '@' you may use any ASCII character
+UHS="@"
+
+# parse git branch - install git beforehand
+function parse_git_branch() {
+    git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/(\1)/'
+}
+
+function command_prompt() {
+    # get error code of previous command
+    PREVIOUS=$?
+
+    # insert a new line to clear space from previous command
+    PS1="\n"
+
+    # First line - arrow wrap around and color
+    PS1="${PS1}${cARROW}\342\224\214\342\224\200"
+
+    # First line - show if previous command was successful
+    if [ $PREVIOUS -ne 0 ] ; then
+        PS1="${PS1}${cBRACKETS}[${cERROR}:(${cBRACKETS}]${cLINES}\342\224\200"
+    else
+        PS1="${PS1}${cBRACKETS}[${cSUCCESS}:)${cBRACKETS}]${cLINES}\342\224\200"
+    fi
+
+    # First line - current time
+    PS1="${PS1}${cBRACKETS}[${cTIME}\D{%H:%M}${cBRACKETS}]${cLINES}\342\224\200"
+
+    # First line - set color of brackets if its an SSH session
+    if [[ $SSH_CLIENT ]] || [[ $SSH2_CLIENT ]]; then
+                sesClr="$cSSH"
+        else
+                sesClr="$cBRACKETS"
+    fi
+
+    # First line - Dont display user if its root
+    if [ $EUID -eq 0 ] ; then
+                PS1="${PS1}${sesClr}[${cRWN}!"
+        else
+                PS1="${PS1}${sesClr}[${cUHS}\u"
+    fi
+
+    # First line - Host session
+    PS1="${PS1}${cUHS}${UHS}\h${sesClr}]${cLINES}\342\224\200"
+
+    # First line - current Directory
+    PS1="${PS1}[${cPWD}\w${cBRACKETS}]"
+
+    #First line - Conda and Git information
+    if [[ ! -z "$CONDA_DEFAULT_ENV" ]]; then
+                PS1="${PS1} ${cSUCCESS}$(parse_git_branch) ${cBRACKETS}venv:${VIOLET}${CONDA_DEFAULT_ENV}"
+        else
+                PS1="${PS1} ${cSUCCESS}$(parse_git_branch)"
+    fi
+
+    # Second line - arrow ending 
+    PS1="${PS1}\n${cARROW}\342\224\224\342\224\200\342\224\200> ${cCMD}"
+}
+
+# load your custom prompt
+function load_prompt () {
+    PROMPT_COMMAND=command_prompt
+    export PS1 PROMPT_COMMAND
+}
+
+load_prompt