Шаблон bash скрипта

#!/usr/bin/env bash
# <script_name>: <description>
# Author: <author>
# Current maintainer (?)
# Copyright/ License (?)
# Project/Repository (?)
# Warnings/Defects (?)
# Argument support: no/yes (use -h/--help for usage info)
# Other information
#______________________________________________________________________________
 
###############################################################################
# Help text
# usage: "# [?] For an explanation, see line <line number>"
#------------------------------------------------------------------------------
# About using bash idioms
#   The bash idiom is used instead of the `if` operator,
#   because `if` operator for the case with 1-2 commands
#   in the then/else branch is too large and unwieldy.
 
 
###############################################################################
# Error Handling
#------------------------------------------------------------------------------
 
# A handler function for terminating signals and errors,
# which should clean up after itself
#   Usage: error_handler
#   Global vars: no
#   Input parameters: no
#   Output values: no
function error_handler {
    local exit_code="$?"
    echo "Error: exit code: $?" >&2
    # some rm shit
    exit "$exit_code"
}  # End of error_handler function
 
 
# Unofficial strict mode
#   -e  --  Ends the script on the first error
#   -E  --  Allows the trap command to work
#   -u  --  When trying to access undefined var the script terminates
#   -o pipefail  -- Terminates the script if any command in the pipeline fails
set -eEuo pipefail
 
# A signal trap that calls the error_handler function
#   ABRT - abort interrupt signal
#   HUP - terminal restart signal
#   INT - interrupt signal (Ctrl+C)
#   QUIT - exit signal (Ctrl+C)
#   TERM - termination signal (allows the process to terminate gracefully)
#   ERR - error signal
trap error_handler ABRT HUP INT QUIT TERM ERR
 
# [?] For an explanation, see line 13
# Checking for superuser privileges ?
(( EUID != 0 )) && { echo "The script needs superuser rights." >&2; exit 1; }
 
PROGRAM="${0##*/}"  # bash version of the `basename` command
 
###############################################################################
# Global variables/constants
#------------------------------------------------------------------------------
EXAMPLE_GLOBAL_VAR='/path/2/shit'
 
 
##############################################################################
# Functions
#-----------------------------------------------------------------------------
# <Function usage>
# Global vars: no
# Input parameters: no
# Output values: no
function Foo {
	:
}  # End of Foo function
 
 
#-----------------------------------------------------------------------------
# <Othuh function usage>
# Global vars: no
# Input parameters: no
# Output values: no
function Bar {
	:
}  # End of Bar function
 
 
###############################################################################
# Main code
#------------------------------------------------------------------------------

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Соус: Книга “Идиомы Bash” → Глава 11. “Разработка своего руководства по стилю” → “Шаблон сценария”

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