upd/setup.sh

#!/bin/bash
# file: setup.sh
# Folder: upd (from git clone)
# git clone https://git.a-lec.org/echolib/upd.git
# By echolib
# License: GNU AFFERO GENERAL PUBLIC LICENSE Version 3, 19 November 2007
unset ${!setup_@}

#----------------------------------------------------------------------
# Configuration ; folders and files to create/chown/copy...
#----------------------------------------------------------------------
# Directories to CHOWN -R
set_dir_R_CHO=(
var/lib/upd
etc/upd
)

# Directories to check ONLY with mkdir -p
setup_dir_bin="usr/local/bin"

# main app name
setup_app_name="upd"
# filename application to CHOWN + CHMOD 755
set_files_R_CHO=(
upd
)

# bin uri
set_bin_uri="$setup_dir_bin/$setup_file_bin"

#======================================================================

#----------------------
# Check commands exists
#----------------------
if__command() {
! [[ `command -v $1` ]] \
  && echo -e "! Missing $1 command" \
  && exit 1
}

if__command sudo
if__command rsync

#------------------------
# Check commands function
#------------------------
setup__check_err() {
if (( cmd_res == 0 ));then
  echo -ne " OK\n"
else
  echo -ne " Error $cmd_res\n"
  exit 1
fi
}

#----------------------------------------------------------------------
# Remove Process
#----------------------------------------------------------------------
case "$1" in
  remove|-R)
    [[ -f "/$set_bin_uri" ]] \
      && echo "- Removing /$set_bin_uri" \
      && sudo rm -f "/$set_bin_uri"
    
    for setup_folder in ${set_dir_R_CHO[@]}
    do
      [[ -d "/$setup_folder" ]] \
        && echo "- Removing /$setup_folder" \
        && sudo rm -rf "/$setup_folder"    
    done    
    echo "# upd is uninstalled. Thank you for testing."
    ;;
esac

#----------------------------------------------------------------------
# Installation Process
#----------------------------------------------------------------------
setup__install() {
  
  setup__gen_process() {
  echo "- Folder: /$1"

  echo -ne "  Created:"
  sudo mkdir -p "/$1" \
    && cmd_res="$?" \
    && setup__check_err

  case "$2" in
    chdir)
      echo -ne "  Owner $setup_user:"
      sudo chown -R "$setup_user":"$setup_user" "/$1" \
        && cmd_res="$?" \
        && setup__check_err
      ;;
  esac
  
  echo -ne "  Copy files:"
  sudo rsync -a "$1/" "/$1/" \
    && cmd_res="$?" \
    && setup__check_err
  }

for setup_folder in ${set_dir_R_CHO[@]}
do
  setup__gen_process "$setup_folder" chdir
done

setup__gen_process "$setup_dir_bin"
for setup_file in ${set_files_R_CHO[@]}
do
  echo -ne "  Owner $setup_user for $setup_file:"
  sudo chown "$setup_user":"$setup_user" "/$setup_dir_bin/$setup_file" \
    && cmd_res="$?" \
    && setup__check_err
  sudo chmod 755 "/$setup_dir_bin/$setup_file"
done

printf '\n%b\n%b\n%b\n' \
       "# Thank you for installing upd." \
       "  (You can remove the repo and use upd -U to update)" \
       "  Have fun !"
}

#----------------------------------------------------------------------
# MAIN PROCESS
#----------------------------------------------------------------------
# PWD is Not a repo
! [[ -d ".git" ]] \
  && echo "! No repository here" \
  && unset ${!setup_@} \
  && exit 0

# Updaate && Check Version
setup_ins_version=`
awk 'NR==2 {print $3}' "/$setup_dir_bin/$setup_file_bin" 2>/dev/null`
setup_new_version=`
awk 'NR==2 {print $3}' "$setup_dir_bin/$setup_file_bin" 2>/dev/null`

[[ "$setup_ins_version" == "$setup_new_version" ]] \
  && echo "$setup_file_bin is already up to date" \
  && unset ${!setup_@} \
  && exit 0

# Directory project name (First folder from git clone)
read -rp ": Set $setup_app_name for user $USER (Y|n|[set])? " setup_user
case "$setup_user" in
  ""|Y|y|O|o)
    setup_user="$USER"
    ;;
  N|n)
    unset ${!setup_@}
    exit 1
    ;;
  *)
    ! [[ `awk -F: '{print $1}' /etc/passwd | grep "$setup_user"` ]] \
      && echo "! No registred user: $setup_user" \
      && unset ${!setup_@} \
      && exit 1
    ;;
esac

echo
echo "# $setup_app_name Version: $setup_ins_version > $setup_new_version"
read -rp "# Ready to install (y|N)? " setup_confirm
case "$setup_confirm" in
  Y|y|O|o) setup__install ;;
  *)       unset ${!setup_@};exit 0 ;;
esac