dotfiles/.bashrc

#
# .bashrc
# (Note: this _should_ be _somewhat_ OS-agnostic, at least, enough for me)
#

# If not running interactively, don't do anything
[[ $- != *i* ]] && return

# source global bashrc settings (turned off by default, uncomment otherwise)
# [ -f /etc/bashrc ] && source /etc/bashrc

shopt -s checkwinsize   # check window size after cmd, update LINES and COLUMNS
shopt -s globstar       # pattern '**' matches all files, >= 0 dir/subdirs
#shopt -s expand_aliases # //


HISTSIZE=48000          # history lines stored in memory (while using bash)
HISTFILESIZE=48000      # history lines stored in .bash_history after session
HISTCONTROL=ignoredups  # ignore duplicate commands or if start with a space
shopt -s histappend     # append to history file instead of overwriting

case "$(uname -s)" in   # for OS-specific configuration
    Linux)                          operating_system='linux'   ;;
    Darwin)                         operating_system='macOS'   ;;
    FreeBSD|OpenBSD|NetBSD)         operating_system='BSD'   ;;
    CYGWIN*|MINGW32*|MSYS*|MINGW*)  operating_system='windows' ;;
    *)                              operating_system='other'   ;;
esac

[ -f /etc/hostname ] && hostname="$(cat /etc/hostname)"

# set PATH to something tolerable
# NOTE: in Arch, everything's already in /usr/bin, /usr/sbin anyway
if [ "$operating_system" = "linux" ]; then
    PATH="/usr/bin:/usr/local/bin:/bin:/usr/sbin:/usr/local/sbin:/sbin" # base
    PATH="$PATH:/usr/local/games:/usr/games"                            # base
    PATH="$PATH:/var/lib/snapd/snap/bin"                                # snapd
    PATH="$PATH:$HOME/bin"                                    # secret sauce
    if [ "$hostname" = "shorefall" ]; then 
        PATH="$PATH:$HOME/bin/jdk-11.0.10+9/bin"              # JavaTM
        PATH="$PATH:$HOME/bin/android-studio/bin"             # Android Studio
        PATH="$PATH:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl"
    fi
elif [ "$operating_system" = "macOS" ]; then
    PATH="/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"
    PATH="$PATH:/Library/Apple/usr/bin"
    work_set_path "$PATH"
fi

# apply work settings
[ -f "$HOME"/.bash_work_stuff ] && source "$HOME"/.bash_work_stuff

export PATH

export EDITOR="vim"
export BROWSER="firefox"

if [[ "$operating_system" = "macOS" || "$operating_system" = "BSD" ]] ; then
    export CLICOLOR=1
fi

# use 'nvim' if it exists on system
if command -v nvim > /dev/null 2>&1 ; then
    export EDITOR="nvim"
    alias vim='nvim'
fi

# make less more friendly for non-text input files, see lesspipe(1)
[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)"


# uncomment for a colored prompt, if the terminal has the capability; turned
# off by default to not distract the user: the focus in a terminal window
# should be on the output of commands, not on the prompt
#force_color_prompt=yes
if [ -n "$force_color_prompt" ]; then
    if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
        # We have color support; assume it's compliant with Ecma-48
        # (ISO/IEC-6429). (Lack of such support is extremely rare, and such
        # a case would tend to support setf rather than setaf.)
        color_prompt=yes
    else
        color_prompt=
    fi  
fi

# PS1 settings
#Old PS1: PS1="[\u@\h]:\w\$ "
if [[ $(id -u) -eq 0 ]]; then             # if current user is root
    PS1="\[\033[41m\]\[\033[37m\][\u@\h]\[\033[00m\]:\[\033[01;31m\]\w\[\033[00m\]\$ "
elif [[ -f ~/.bash_prompt ]]; then        # not root, but ~/.bash_prompt exists
    unset color_prompt force_color_prompt
    source ~/.bash_prompt
else                                      # if not root, and no prompt config
    PS1="\[\033[1;37m\][\u@\h]\[\033[00m\]:\[\033[01;32m\]\w\[\033[00m\]$ "
fi

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


############################## user functions ##############################

# find-keyword [directory path] [keyword]: find and list files with keyword in
# the filename
find-keyword() {
    if [ "$#" -ne 2 ]; then                         # if not given 2 arguments
        echo "Usage: find-keyword [directory path] [keyword]"
    else
        find $1 -name "*$2*" -ls
    fi
}

# find-string [string] [directory path]: find and list files containing the
# provided string (and list all occurences/line numbers of the string)
find-string() {
    if [ "$#" -ne 2 ]; then                         # if not given 2 arguments
        echo "Usage: find-string [string] [directory path]"
    else
        grep -nR "$1" "$2"
    fi
}

# img_loop_here: $1 = seconds until next photo  displayed
# BUG: currently, after running this function, the user needs to manually run
# 'reset' to unscrew the terminal
img-loop-here() {
    if [ "$1" = "" ]; then
        echo "Usage: img_loop_here [seconds until next photo displayed]"
    else
        while true; do
            for g in $(ls .); do
                timeout "$1" chafa -c full "$g"
            done
        done
    fi
}

# rainbow-shell: print out a looping rainbow in the shell. Happy pride month!
# For best results, run in full-screened terminal (Mod+f in i3)
rainbow-shell() {
    yes "$(seq 231 -1 16)" | while read i; do
        printf "\x1b[48;5;${i}m\n"
        sleep .02
    done
}

# colors - print out current color values set in terminal
colors() {
    local fgc bgc vals seq0

    printf "Color escapes are %s\n" '\e[${value};...;${value}m'
    printf "Values 30..37 are \e[33mforeground colors\e[m\n"
    printf "Values 40..47 are \e[43mbackground colors\e[m\n"
    printf "Value  1 gives a  \e[1mbold-faced look\e[m\n\n"

    # foreground colors
    for fgc in {30..37}; do
        # background colors
        for bgc in {40..47}; do
            fgc=${fgc#37} # white
            bgc=${bgc#40} # black

            vals="${fgc:+$fgc;}${bgc}"
            vals=${vals%%;}

            seq0="${vals:+\e[${vals}m}"
            printf "  %-9s" "${seq0:-(default)}"
            printf " ${seq0}TEXT\e[m"
            printf " \e[${vals:+${vals+$vals;}}1mBOLD\e[m"
        done
        echo; echo
    done
}

# term-color-vals: print all 256-bit color values in their associated color
term-color-vals() {
    for i in {0..255}; do
        printf "\x1b[38;5;${i}mcolor%-5i\x1b[0m" $i
        if ! (( ($i + 1 ) % 8 )); then
            echo
        fi
    done
}

# ex - archive extractor
# usage: ex <file>
universal-extract() {
  if [ -f $1 ] ; then
    case $1 in
      *.tar.bz2)   tar xjf $1    ;;
      *.tar.gz)    tar xzf $1    ;;
      *.bz2)       bunzip2 $1    ;;
      *.rar)       unrar x $1    ;;
      *.gz)        gunzip $1     ;;
      *.tar)       tar xf $1     ;;
      *.tbz2)      tar xjf $1    ;;
      *.tgz)       tar xzf $1    ;;
      *.zip)       unzip $1      ;;
      *.Z)         uncompress $1 ;;
      *.7z)        7z x $1       ;;
      *)           echo "'$1' cannot be extracted via ex()" ;;
    esac
  else
    echo "'$1' is not a valid file"
  fi
}

# prune_bash_history - remove certain frequently-used/"clutter" command entries
# from .bash_history
prune_bash_history() {
    sed 's/^l$//g ; s/^ll$//g ; s/^la$//g ; s/^lla$//g ; s/^cl$//g ; s/^ranger$//g' \
        "$HOME"/.bash_history > "$HOME"/.bash_history-BAK
    if [ -f "$HOME"/.bash_history-BAK ] ; then
        mv "$HOME"/.bash_history-BAK "$HOME"/.bash-history
    else
        echo "[ERROR] .bash_history-BAK was not created. Aborting..."
    fi
}

# public-ip: fetch current public IP address
public-ip() {
    curl 'http://icanhazip.com/'
}

# scan-for-printers: look for printers on the connected LAN
scan-for-printers() {
    sudo lpinfo -v
}

# wifi-strength: get some WiFi statistics in real time
wifi-strength() {
    watch -n 1 cat /proc/net/wireless
}


############################## aliases ##############################

# Note to self: alias substitution is recursive AS LONG AS each expanded alias
# ends in a space character (allowing for multiple aliases to be used on one
# line). This is a POSIX specification. You do not know how long it took me to
# figure this out.

# miscellaneous aliases
alias cl='clear '
alias e='exit '
alias q='exit '
alias DIE='shutdown now '
alias cp='cp -i '                          # confirm before overwriting a file
alias df='df -h '
alias fucking='sudo '
alias bc='bc -l '                          # makes bc use 'scale=20' by default
alias bashrc="$EDITOR ~/.bashrc"
alias vimrc="$EDITOR ~/.vimrc"
alias nanorc="nano ~/.config/nano/nanorc"  # just for fun!
alias rot13="tr 'A-Za-z' 'N-ZA-Mn-za-m' "

not_in_vim="echo -e \"You're not in vim doofus!\""
alias :wq="$not_in_vim" ; alias :q="$not_in_vim" ; alias :x="$not_in_vim"
alias ZZ="$not_in_vim"

alias rager='ranger '; alias anger='ranger '; alias range='ranger '
alias rangre='ranger '; alias rangr='ranger ' # <<<-^^^-: common ranger typos

alias gdb='gdb -q '  # muzzle gdb

if [ "$hostname" = "shorefall" ]; then
    alias i3config="$EDITOR ~/.config/i3/config && i3-msg reload && i3-msg restart"
    alias spellcheck='aspell check '
    alias iso-date='date --iso-8601=s '
fi

if [[ "$operating_system" = "macOS" ]]; then
    alias ls='ls -C '
    alias l='ls -C '
    alias ll='ls -lh '
    alias la='ls -A '
    alias lla='ls -lhA '
elif [[ "$operating_system" = "BSD" ]]; then
    alias ls='ls --color=auto '
    alias l='ls --color=auto '
    alias ll='ls -lh --color=auto '
    alias la='ls -A --color=auto '
    alias lla='ls -lhA --color=auto '
else                            # assume GNU ls (most desktop Linux distros)
    alias ls='ls --color=auto '
    alias l='ls --color=auto '
    alias ll='ls -lh --color=auto '
    alias la='ls -A --color=auto '
    alias lla='ls -lhA --color=auto '

    alias grep='grep --color=auto '
    alias egrep='egrep --color=auto '
    alias fgrep='fgrep --color=auto '
fi


############################## bash completion ##############################

# enable programmable completion features (possibly already enabled by
# /etc/bash.bashrc or /etc/profile).
if [ -f /usr/share/bash-completion/bash_completion ]; then
    source /usr/share/bash-completion/bash_completion
elif [ -f /etc/bash_completion ]; then
    source /etc/bash_completion
fi
if [ "$operating_system" = "macOS" ]; then
    if [ -f /usr/local/etc/bash_completion ]; then          # for macOS
        source /usr/local/etc/bash_completion
    elif [ -d /usr/local/etc/bash_completion.d ]; then      # also for macOS
        for file in /usr/local/etc/bash_completion.d/* ; do
            source "$file"
        done
    fi
fi

complete -cf sudo                     # so sudo actually has tab autocompletion
bind 'set completion-ignore-case on'  # case-insensitive tab autocompletion