#!/usr/bin/env bash # get.bpan.org

BPAN Quick Installer

Install BPAN with this simple command: 

 curl get.bpan.org | bash

The following shells are supported:

  1. ash
  2. bash
  3. dash
  4. fish
  5. ksh
  6. mksh
  7. mrsh
  8. posh
  9. sh
  10. tcsh
  11. yash
  12. zsh

It will run the following BPAN installation program: 


#!/usr/bin/env bash


# [[ ${DEBUG-} ]] && set -x
shell_re='^(ash|bash|dash|fish|ksh|mksh|mrsh|posh|sh|tcsh|yash|zsh)$'

if [[ -t 1 ]]; then
  R='\e[31m' G='\e[32m' Y='\e[33m' Z='\e[0m'
else
  R='' G='' Y='' Z=''
fi

shopt -s inherit_errexit 2>/dev/null
set -e -u -o pipefail

error() {
  (
    echo -e "${R}Error: $1"
    shift
    printf '       %s\n' "$@"
    echo -e "$Z"
    hint
  ) >&2
  exit 1
}

hint() (
  echo -e "\
${Y}NOTE: Use these environment variables if you need to:

* BPAN_ROOT - The BPAN installation directory location.
  * Default is '$HOME/.bpan'.
* BPAN_SHELL - The interactive shell you are using.
  * Use this if script can't figure it out.$Z
"
)

say() (
  printf "${Y}o %s\n$Z" "$1"
)

prompt() {
  local prompt=${1?}
  while true; do
    answer=''
    printf "%s: " "$prompt"
    read -r answer /dev/null || true
  shell="${shell#"${shell%%[![:space:]]*}"}"
  shell=$(cut -d ' ' -f2 <<<"$shell")
  if [[ $shell =~ $shell_re ]]; then
    BPAN_SHELL=$shell
  fi
fi

if [[ ! ${BPAN_SHELL-} ]]; then
  error "Can't determine which shell you are using." \
    "Set the BPAN_SHELL environment variable and try again."
fi

[[ $BPAN_SHELL =~ $shell_re ]] ||
  error \
    "BPAN_SHELL='$BPAN_SHELL' is invalid. Must be set to one of:" \
    "ash, bash, dash, fish, ksh, mksh, mrsh, posh, sh, tcsh, yash or zsh"

# Determine BPAN_ROOT:
if [[ ${BPAN_ROOT-} ]]; then
  if [[ $BPAN_ROOT != /* ]]; then
    error "You set BPAN_ROOT='$BPAN_ROOT'" \
      "BPAN_ROOT must be the absolute path of a directory," \
      "and the directory must not yet exist."
  fi
  if [[ -e $BPAN_ROOT ]]; then
    error "You set BPAN_ROOT='$BPAN_ROOT'" \
      "but that directory already exists."
  fi
else
  BPAN_ROOT=$HOME/.bpan
  if [[ -e $BPAN_ROOT ]]; then
    error "You didn't set BPAN_ROOT," \
      "so defaulting to '$BPAN_ROOT'," \
      "but that directory already exists."
  fi
fi

echo -e "\

${G}Ready to install BPAN with:$Z

  BPAN_ROOT=$BPAN_ROOT
  BPAN_SHELL=$BPAN_SHELL

"
prompt "Continue? [yn]"

echo

[[ $answer == y ]] || {
  echo -e "$R*** NOT installing BPAN now. ***$Z"
  echo
  hint
  exit 0
}

echo -e "${G}Installing BPAN now...$Z"
sleep 1

(
  set -x
  git clone -q https://github.com/bpan-org/bpan "$BPAN_ROOT"
)

case "$BPAN_SHELL" in
  ash | dash | ksh | mksh | posh | sh)
    cmd="BPAN_ROOT='$BPAN_ROOT' . '$BPAN_ROOT/.rc'" ;;
  mrsh)
    cmd="BPAN_ROOT='$BPAN_ROOT'; . '$BPAN_ROOT/.rc'" ;;
  bash | fish | tcsh | zsh)
    cmd="source '$BPAN_ROOT/.rc'" ;;
  yash)
    cmd=". '$BPAN_ROOT/.rc' 2>/dev/null" ;;
  *)
    error "*** Unexpected error ***" ;;
esac



# XXX Figure out why processing stops after the following:

# # Source the bpan/.rc file to do initial setup of $BPAN_ROOT/config.
# echo
# echo "Initializing your BPAN user config file: '$BPAN_ROOT/config'"
# true && (
#   eval "set +e +u; $cmd"
# )



echo -e "\

$G*** Success! ***$Z

${Y}BPAN is installed in directory:$Z

  $BPAN_ROOT

${Y}Enable the 'bpan' command for the '$BPAN_SHELL' shell with:$Z

  $cmd

${Y}Run the above command now to enable 'bpan' in this shell session.
Add it to your '$BPAN_SHELL' shell's startup file to enable it for all
future '$BPAN_SHELL' shell sessions.
$Z
"
#