.bashrc

# shellcheck disable=SC1090,SC1091,SC2039

##########################
#  Early Initialization  #
##########################

# Setup some environment variables before the interactivity check. This is the
# only place where you can place startup commands that will be picked up by
# non-interactive SSH sessions.
#
# https://www.gnu.org/software/bash/manual/bash.html#Invoked-by-remote-shell-daemon

if [[ -f ~/.nix-profile/etc/profile.d/hm-session-vars.sh ]]; then
  source ~/.nix-profile/etc/profile.d/hm-session-vars.sh
fi

export EDITOR="nvim"
export LANG="en_US.UTF-8"
export LESS="iFMR"
export PAGER="less"
export SYSTEMD_LESS="iFRSMK"
export GOPATH=~/Documents/src/go

# whether to make use of powerline fonts
if [[ -n "$DISPLAY$WAYLAND_DISPLAY$SSH_CONNECTION$SSH_TTY" ]]; then
  export USE_POWERLINE=1
else
  export USE_POWERLINE=0
fi

# skip the rest for non-interactive sessions
case $- in
  *i*) ;;
  *) return ;;
esac

###########################
#  Environment Variables  #
###########################
GPG_TTY="$(tty)"
printf -v PATH "%s:" \
  ~/.local/bin \
  "$PATH" \
  ~/.config/emacs/bin
PATH="${PATH%%:}"

export GPG_TTY
export PATH

command -v direnv >/dev/null 2>&1 && eval "$(direnv hook bash)"

###########################
#  Aliases and Functions  #
###########################
alias grep='grep --color=auto'
alias fgrep='fgrep --color=auto'
alias egrep='egrep --color=auto'
alias ls='ls -F --color=auto'
alias ll='ls -lh'
alias la='ls -lAh'
alias ssh-fa='ssh-agent ssh -o AddKeysToAgent=confirm -o ForwardAgent=yes'

#############
#  History  #
#############
HISTCONTROL=ignoreboth
HISTSIZE=1000
HISTFILESIZE=2000
shopt -s cmdhist
shopt -s lithist
shopt -s histappend

######################
#  Terminal Support  #
######################
__dot::urlencode() {
  # Use LC_CTYPE=C to process text byte-by-byte.
  local LC_CTYPE=C LC_ALL='' raw_url="$1" safe
  while [[ -n "$raw_url" ]]; do
    safe="${raw_url%%[!a-zA-Z0-9/:_\.\-\!\'\(\)~]*}"
    printf "%s" "$safe"
    raw_url="${raw_url#"$safe"}"
    if [[ -n "$raw_url" ]]; then
      printf "%%%02X" "'$raw_url"
      raw_url="${raw_url#?}"
    fi
  done
}

__dot::report_cwd() {
  printf "\e]7;file://%s%s\a" "${HOSTNAME:-}" "$(__dot::urlencode "$PWD")"
}

# deal with missing line feeds from previous command
__dot::print_missing_lf() {
  # XXX: This might not sit well with misbehaving terminals. It also messes
  # up output on window resize, but I decided to just live with it for now
  # because only a few applications fail to output a trailing newline.
  # FWIW zsh also exhibits this behavior.
  #
  # Reference:
  # https://www.vidarholen.net/contents/blog/?p=878
  # https://unix.stackexchange.com/questions/60459
  printf "\\e[7m\$\\e[0m%$((COLUMNS - 1))s\\r\\e[K"
}

case "$TERM" in
  xterm*)
    PROMPT_COMMAND="__dot::print_missing_lf;__dot::report_cwd;$PROMPT_COMMAND"
    ;;
  screen*|tmux*)
    PROMPT_COMMAND="__dot::print_missing_lf;$PROMPT_COMMAND"
    ;;
esac

if [[ -n "$INSIDE_EMACS" ]]; then
  export EDITOR='emacsclient'
fi

##########
#  Misc  #
##########
set -o noclobber
shopt -s checkjobs
shopt -s checkwinsize
shopt -s globstar
stty -ixoff -ixon # disable flow control

if ! shopt -oq posix; then
  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
fi

###########
#  Theme  #
###########
if [[ $TERM == "dumb" ]]; then
  PS1='\u@\h:\w\$ '
  return
fi

unset LS_COLORS # clear distro defaults

__prompt_dashboard_lite() {
  local exitcode="$?" # must come first

  PS1='\[\e]0;\w\a\]' # set terminal title

  if (( EUID == 0 || UID == 0 || EUID != UID )); then
    PS1+='\[\e[1;31m\]\u\[\e[0m\] in '
  fi
  PS1+='\[\e[1;34m\]\w\[\e[0m\]'
  if [[ -n "$SSH_CONNECTION" ]]; then
    PS1+=' at \[\e[1;33m\]\h\[\e[0m\]'
  fi
  PS1+=' using \[\e[1;32m\]bash\[\e[0m\]'
  if [[ -n "$IN_NIX_SHELL" ]]; then
    PS1+=' via \[\e[1;36m\]'"${name:-nix-shell}"'\[\e[0m\]'
  fi

  if (( exitcode == 0 )); then
    PS1+='\n\[\e[1;32m\]\$\[\e[0m\] '
  else
    PS1+='\n\[\e[1;31m\]\$\[\e[0m\] '
  fi
}

# must come last
PROMPT_COMMAND="__prompt_dashboard_lite;$PROMPT_COMMAND"