Linux Bashrc Configuration

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This bashrc file configures the Bash shell environment in Linux. It customizes the prompt, sets up aliases, manages proxy settings, and integrates with tools like Git. Below is a breakdown of the key configurations:

1. Basic Settings:

HISTCONTROL=ignoreboth: Ignores duplicate commands and commands starting with a space in the history.
shopt -s histappend: Appends new history entries to the history file.
HISTSIZE=1000: Sets the number of history entries to keep in memory.
HISTFILESIZE=2000: Sets the maximum size of the history file.
shopt -s checkwinsize: Updates the terminal window size.

2. Color Prompt:

Configures a colored command prompt if the terminal supports it.

3. Window Title:

Sets the terminal window title to display the current user, host, and working directory.

4. Directory Colors:

Enables colored output for ls command if dircolors is available.

5. Aliases:

alias ll='ls -alF': Lists all files with detailed information.
alias la='ls -A': Lists all files, including hidden ones.
alias l='ls -CF': Lists files in columns.
alias alert='notify-send ...': Sends a desktop notification after a command finishes.

6. Bash Aliases File:

Includes a separate file for custom aliases (~/.bash_aliases).

7. Bash Completion:

Enables bash completion if available.

8. Path Configuration:

export PATH=...: Adds various directories to the PATH environment variable, including those for CUDA, Ruby gems, local binaries, and system binaries.

9. Proxy Management:

export GLOBAL_PROXY='127.0.0.1:7890': Defines a variable for the proxy server address.
function start_proxy { ... }: Sets the HTTP_PROXY, HTTPS_PROXY, http_proxy, https_proxy, and ALL_PROXY environment variables to use the specified proxy.
function start_proxy_without_prefix { ... }: Similar to start_proxy, but sets the proxy variables without the http:// prefix.
function stop_proxy { ... }: Unsets the proxy variables, effectively disabling the proxy.
export NO_PROXY="localhost,127.0.0.1,.example.com,::1": Specifies hosts that should bypass the proxy.

10. Git Proxy:

- `function start_git_proxy { ... }`: Configures git to use the global proxy for HTTP and HTTPS connections.
- `function stop_git_proxy { ... }`: Unsets the git proxy settings.

11. Default Proxy:

- `start_proxy`: Starts proxy by default.
- `start_git_proxy`: Starts git proxy by default.

12. Python Aliases:

alias python=python3: Sets python to use python3.
alias pip=pip3: Sets pip to use pip3.

13. Git Message AI Aliases:

function gpa { ... }: Creates an alias gpa to run a python script gitmessageai.py with the mistral API and allow pull and push.
function gca { ... }: Creates an alias gca to run the same script without pushing changes.
function gm { ... }: Creates an alias gm to run the same script and only print the commit message.

14. Git Push with Pull and Rebase:

function gpp { ... }: Attempts to push changes, and if it fails, it tries to pull with rebase and then push again.

15. Pre-Execution Proxy Check:

preexec() { ... }: This function is executed before every command. It checks if the command is in a list of network-dependent commands. If it is, and if any proxy variables are set, it displays the proxy settings.
local network_commands=( ... ): This array lists commands that are considered network-dependent.
display_proxy() { ... }: This function displays the current proxy settings.

16. Check Proxy Function:

function checkproxy { ... }: Displays the current HTTP and HTTPS proxy settings, as well as Git proxy settings.

case $- in
    *i*) ;;
      *) return;;
esac

HISTCONTROL=ignoreboth
shopt -s histappend
HISTSIZE=1000
HISTFILESIZE=2000
shopt -s checkwinsize

[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)"

if [ -z "${debian_chroot:-}" ] && [ -r /etc/debian_chroot ]; then
    debian_chroot=$(cat /etc/debian_chroot)
fi

case "$TERM" in
    xterm-color|*-256color) color_prompt=yes;;
esac

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

case "$TERM" in
xterm*|rxvt*)
    PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1"
    ;;
*)
    ;;
esac

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

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$//'\'')"'

if [ -f ~/.bash_aliases ]; then
    . ~/.bash_aliases
fi

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



export PATH="/usr/local/cuda-12.2/bin:/home/lzw/.local/share/gem/ruby/3.0.0/bin:/home/lzw/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/snap/bin"

export GLOBAL_PROXY='127.0.0.1:7890'

function start_proxy {
    export HTTP_PROXY="http://$GLOBAL_PROXY"
    export HTTPS_PROXY="http://$GLOBAL_PROXY"
    export http_proxy="http://$GLOBAL_PROXY"
    export https_proxy="http://$GLOBAL_PROXY"
    export HTTP_PROXY_REQUEST_FULLURI=false
    export HTTPS_PROXY_REQUEST_FULLURI=false
    export ALL_PROXY=$http_proxy
}

function start_proxy_without_prefix {
    export http_proxy=$GLOBAL_PROXY
		export HTTP_PROXY=$GLOBAL_PROXY
		export https_proxy=$GLOBAL_PROXY
    export HTTPS_PROXY=$GLOBAL_PROXY
    export HTTP_PROXY_REQUEST_FULLURI=false
    export HTTPS_PROXY_REQUEST_FULLURI=false
		export ALL_PROXY=$http_proxy
}

function stop_proxy {
    export http_proxy=
		export HTTP_PROXY=
		export https_proxy=
    export HTTPS_PROXY=
    export HTTP_PROXY_REQUEST_FULLURI=true
    export HTTPS_PROXY_REQUEST_FULLURI=true
		export ALL_PROXY=		
}

export NO_PROXY="localhost,127.0.0.1,.example.com,::1"


function start_git_proxy {
  git config --global http.proxy $GLOBAL_PROXY
  git config --global https.proxy $GLOBAL_PROXY
}

function stop_git_proxy {
  git config --global --unset http.proxy
  git config --global --unset https.proxy
}

start_proxy
start_git_proxy

alias python=python3
alias pip=pip3

function gpa {
  python ~/bin/gitmessageai.py --api mistral --allow-pull-push
}

function gca {
  python ~/bin/gitmessageai.py --no-push
}

function gm {
  python ~/bin/gitmessageai.py --only-message
}

function gpp {
  git push || {
    echo "Push failed, attempting pull and merge"
    git pull --rebase || {
      echo "Pull failed, please resolve conflicts manually"
      return 1
    }
    git push || {
      echo "Push failed after pull, please resolve conflicts manually"
      return 1
    }
  }
}

preexec() {
    local network_commands=(
        "gpa"
        "git"
        "ssh"
        "scp"
        "sftp"
        "rsync"
        "curl"
        "wget"
        "apt"
        "yum"
        "dnf"
        "npm"
        "yarn"
        "pip"
        "pip3"
        "gem"
        "cargo"
        "docker"
        "kubectl"
        "ping"
        "traceroute"
        "netstat"
        "ss"
        "ip"
        "ifconfig"
        "dig"
        "nslookup"
        "nmap"
        "telnet"
        "ftp"
        "nc"
        "tcpdump"
        "adb"
        "bundle"
        "brew"
        "cpanm"
        "bundle exec jekyll"
        "make"
        "python"
        "glcoud"
    )

    local cmd
    cmd=$(echo "$1" | awk '{print $1}')

    display_proxy() {
        echo -e "🚀 **Proxy Settings Detected:**"

        [ -n "$HTTP_PROXY" ] && echo "   - HTTP_PROXY: $HTTP_PROXY"
        [ -n "$HTTPS_PROXY" ] && echo "   - HTTPS_PROXY: $HTTPS_PROXY"

        echo ""
    }

    for network_cmd in "${network_commands[@]}"; do
        if [[ "$1" == "$network_cmd"* ]]; then
            if [ -n "$HTTP_PROXY" ] || [ -n "$http_proxy" ] || \
               [ -n "$HTTPS_PROXY" ] || [ -n "$https_proxy" ] || \
               [ -n "$ALL_PROXY" ] || [ -n "$all_proxy" ]; then
                
                display_proxy
            fi
            break
        fi
    done
}

function checkproxy {
  echo "HTTP_PROXY: $HTTP_PROXY"
  echo "HTTPS_PROXY: $HTTPS_PROXY"
  echo "Git HTTP Proxy:"
  git config --get http.proxy
  echo "Git HTTPS Proxy:"
  git config --get https.proxy
}

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