Environment Variables & Profiles: Complete Guide to Shell Configuration

# ~/.bashrc - executed for interactive non-login shells

# If not running interactively, don't do anything
case $- in
    *i*) ;;
      *) return;;
esac

# Don't put duplicate lines or lines starting with space in history
HISTCONTROL=ignoreboth

# Append to the history file, don't overwrite it
shopt -s histappend

# History length (see HISTSIZE and HISTFILESIZE)
HISTSIZE=10000
HISTFILESIZE=20000

# Check window size after each command
shopt -s checkwinsize

# Make less more friendly for non-text input files
[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)"

# Set variable identifying the chroot you work in
if [ -z "${debian_chroot:-}" ] && [ -r /etc/debian_chroot ]; then
    debian_chroot=$(cat /etc/debian_chroot)
fi

# Colored prompt
force_color_prompt=yes
if [ -n "$force_color_prompt" ]; then
    if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
        color_prompt=yes
    else
        color_prompt=
    fi
fi

if [ "$color_prompt" = yes ]; then
    PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
else
    PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
fi
unset color_prompt force_color_prompt

# If this is an xterm set title to user@host:dir
case "$TERM" in
xterm*|rxvt*)
    PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1"
    ;;
*)
    ;;
esac

# Enable color support for ls and grep
if [ -x /usr/bin/dircolors ]; then
    test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)"
    alias ls='ls --color=auto'
    alias grep='grep --color=auto'
    alias fgrep='fgrep --color=auto'
    alias egrep='egrep --color=auto'
fi

# Colored GCC warnings and errors
export GCC_COLORS='error=01;31:warning=01;35:note=01;36:caret=01;32:locus=01:quote=01'

# Aliases
alias ll='ls -alF'
alias la='ls -A'
alias l='ls -CF'
alias alert='notify-send --urgency=low -i "$([ $? = 0 ] && echo terminal || echo error)" "$(history|tail -n1|sed -e '\''s/^\s*[0-9]\+\s*//;s/[;&|]\s*alert$//'\'')"'

# Enable programmable completion features
if ! shopt -oq posix; then
  if [ -f /usr/share/bash-completion/bash_completion ]; then
    . /usr/share/bash-completion/bash_completion
  elif [ -f /etc/bash_completion ]; then
    . /etc/bash_completion
  fi
fi

# Custom environment variables
export EDITOR='vim'
export VISUAL='vim'
export PAGER='less'
export BROWSER='firefox'

# Custom PATH additions
export PATH="$HOME/bin:$PATH"
export PATH="$HOME/.local/bin:$PATH"
export PATH="/usr/local/go/bin:$PATH"

# Java configuration
export JAVA_HOME="/usr/lib/jvm/java-11-openjdk-amd64"
export PATH="$JAVA_HOME/bin:$PATH"

# Python configuration
export PYTHONPATH="$HOME/python:$PYTHONPATH"
export PYTHONSTARTUP="$HOME/.pythonrc"

# Node.js configuration
export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion

# Docker configuration
export DOCKER_HOST="unix:///var/run/docker.sock"

# Custom functions
function mcd() { mkdir -p "$1" && cd "$1"; }
function cl() { cd "$1" && ls; }
function grep() { command grep --color=auto "$@"; }
function ipinfo() { curl ipinfo.io/"$1"; }

# Git prompt support
if [ -f ~/.git-prompt.sh ]; then
    source ~/.git-prompt.sh
    PS1='\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[01;31m\]$(__git_ps1)\[\033[00m\]\$ '
fi

# Load local configuration if exists
if [ -f ~/.bashrc_local ]; then
    source ~/.bashrc_local
fi

# ~/.profile - executed by Bourne-compatible login shells

# If running bash
if [ -n "$BASH_VERSION" ]; then
    # Include .bashrc if it exists
    if [ -f "$HOME/.bashrc" ]; then
        . "$HOME/.bashrc"
    fi
fi

# Set PATH so it includes user's private bin if it exists
if [ -d "$HOME/bin" ] ; then
    PATH="$HOME/bin:$PATH"
fi

# Set PATH so it includes user's private bin if it exists
if [ -d "$HOME/.local/bin" ] ; then
    PATH="$HOME/.local/bin:$PATH"
fi

# Set default editor
export EDITOR=vim
export VISUAL=vim

# Set language
export LANG=en_US.UTF-8
export LC_ALL=en_US.UTF-8

# Increase file descriptor limits
ulimit -n 4096

# Set umask for file creation
umask 022

# Set history settings
export HISTSIZE=10000
export HISTFILESIZE=20000
export HISTCONTROL=ignoreboth:erasedups
export HISTIGNORE="ls:ll:la:cd:exit:history"

# Set less options
export LESS='-R -i -j5 -M -W -z-4 -g -e -X -F'

# Set man page colors
export LESS_TERMCAP_mb=$'\e[1;32m'
export LESS_TERMCAP_md=$'\e[1;32m'
export LESS_TERMCAP_me=$'\e[0m'
export LESS_TERMCAP_se=$'\e[0m'
export LESS_TERMCAP_so=$'\e[01;33m'
export LESS_TERMCAP_ue=$'\e[0m'
export LESS_TERMCAP_us=$'\e[1;4;31m'

# Set grep colors
export GREP_COLORS='mt=01;31:sl=:cx=:fn=35:ln=32:bn=32:se=36'

# Custom environment variables for applications
export GOPATH="$HOME/go"
export PATH="$GOPATH/bin:$PATH"

export NVM_DIR="$HOME/.nvm"
export NODE_ENV="development"

export DOCKER_BUILDKIT=1
export COMPOSE_DOCKER_CLI_BUILD=1

export AWS_CLI_AUTO_PROMPT="on-partial"

# Load any machine-specific configuration
if [ -f "$HOME/.profile_local" ]; then
    . "$HOME/.profile_local"
fi