nanuqsaurus/scripts/shell-init.sh

# ---- logging ---------------------------------------------------------------

log_shell_init() {
  local uid="${UID:-}"
  [[ -n "$uid" ]] || uid="$(id -u 2>/dev/null || echo unknown)"

  # Override with:
  #   export NANUQSAURUS_SHELL_INIT_LOG_FILE=/path/to/log
  local log_file="${NANUQSAURUS_SHELL_INIT_LOG_FILE:-/tmp/shell-init-${uid}.log}"

  printf '%s\n' "shell-init: $*" >>"$log_file" 2>/dev/null || true
}

# ---- helpers ---------------------------------------------------------------

have() { command -v "$1" >/dev/null 2>&1; }

is_interactive() {
  [[ -t 1 || -n ${PS1:-} ]]
}

# ---- environment sanity ----------------------------------------------------

if [[ -z ${TERM:-} || $TERM == dumb ]]; then
  export TERM=xterm-256color
fi

INTERACTIVE=0
is_interactive && INTERACTIVE=1

log_shell_init "TERM=$TERM PS1=${PS1:-<empty>} SHELL=$SHELL interactive=$INTERACTIVE"

# Ensure PS1 exists so downstream init blocks run
if (( INTERACTIVE )) && [[ -z ${PS1:-} ]]; then
  PS1='\\s-\\v\\$ '
fi

(( INTERACTIVE )) || return 0

# ---- run-once guard --------------------------------------------------------

# Installed as both loginShellInit (/etc/profile) and interactiveShellInit
# (/etc/bashrc), and /etc/profile sources /etc/bashrc, so a login shell would run
# this twice and register starship's hooks twice. Not exported: child shells must
# initialise on their own.
if [[ -n ${NANUQSAURUS_SHELL_INIT_DONE:-} ]]; then
  log_shell_init "already initialised, skipping"
  return 0
fi
NANUQSAURUS_SHELL_INIT_DONE=1

# ---- bash-preexec ----------------------------------------------------------

if [[ -n ${BASH_VERSION:-} && -z ${bash_preexec_imported:-} && -r "@BASHPREEXEC@" ]]; then
  # shellcheck disable=SC1090
  . "@BASHPREEXEC@"
  log_shell_init "bash-preexec loaded"
fi

# bash-preexec arms its DEBUG trap from __bp_interactive_mode, which it appends to
# the END of PROMPT_COMMAND -- but its lazy installer runs in the MIDDLE of the
# first prompt, because zoxide (below) and ghostty (~/.bashrc) append their hooks
# after it. Those hooks then disarm the trap again, so the first command of every
# session never reaches preexec and atuin never records it. PS0 is expanded once
# per interactive command, before the DEBUG trap, so arming there is independent of
# PROMPT_COMMAND ordering. Needs the non-forking ${ ...; } funsub (bash >= 5.3);
# older bash keeps the previous behaviour.
if [[ -n ${bash_preexec_imported:-} ]] &&
   ((BASH_VERSINFO[0] > 5 || (BASH_VERSINFO[0] == 5 && BASH_VERSINFO[1] >= 3))); then
  # shellcheck disable=SC2016
  __nanuq_bp_arm='${ __bp_preexec_interactive_mode=on; }'
  [[ ${PS0-} == *"$__nanuq_bp_arm"* ]] || PS0=$__nanuq_bp_arm${PS0-}
  unset __nanuq_bp_arm
  log_shell_init "bash-preexec PS0 arming enabled"
fi

# ---- starship --------------------------------------------------------------

if have @STARSHIP@; then
  log_shell_init "starship init"
  case $SHELL in
    */bash) eval "$(@STARSHIP@ init bash)" ;;
    */zsh)  eval "$(@STARSHIP@ init zsh)" ;;
  esac
  # registers starship_precmd/starship_preexec_all with bash-preexec directly
else
  log_shell_init "starship skipped"
fi

# ---- atuin -----------------------------------------------------------------

if have @ATUIN@; then
  log_shell_init "atuin init"

  if [[ -z ${ATUIN_SESSION:-} ]]; then
    export ATUIN_SESSION="$(@ATUIN@ uuid)"
    ATUIN_HISTORY_ID=""
  fi

  case $SHELL in
    */bash) eval "$(@ATUIN@ init bash)" ;;
    */zsh)  eval "$(@ATUIN@ init zsh)" ;;
  esac
  # registers __atuin_preexec/__atuin_precmd with bash-preexec itself
else
  log_shell_init "atuin skipped"
fi

# ---- zoxide ---------------------------------------------------------------

if have zoxide; then
  log_shell_init "zoxide init"
  case $SHELL in
    */bash) eval "$(zoxide init bash)" ;;
    */zsh)  eval "$(zoxide init zsh)" ;;
  esac
  # appends __zoxide_hook to PROMPT_COMMAND; see the PS0 note above
else
  log_shell_init "zoxide skipped"
fi

# ---- aliases --------------------------------------------------------------

if have eza; then
  alias ls='eza'
  alias ll='eza -l --icons=auto --group-directories-first'
  alias l1='eza -1'
  alias l.='eza -d .*'
fi

if have ug; then
  alias grep='ug'
  alias egrep='ug -E'
  alias fgrep='ug -F'
  alias xzgrep='ug -z'
  alias xzegrep='ug -zE'
  alias xzfgrep='ug -zF'
fi

if have bat; then
  alias cat='bat --style=plain --pager=never' 2>/dev/null
fi