bash-helpers

Collection of useful functions for usage in Bash scripts

Installation

[ -d /usr/local/lib/bash/includes ] || sudo mkdir -p /usr/local/lib/bash/includes
sudo curl -o /usr/local/lib/bash/includes/bash-helpers.sh https://raw.githubusercontent.com/nafigator/bash-helpers/master/src/bash-helpers.sh
sudo chmod +x /usr/local/lib/bash/includes/bash-helpers.sh

Install functions examples

#!/usr/bin/env bash

download_bash_helpers() {
	printf "Installing bash-helpers\n"
	[[ ! -d /usr/local/lib/bash/includes ]] || sudo mkdir -p /usr/local/lib/bash/includes

	sudo curl -so /usr/local/lib/bash/includes/bash-helpers.sh https://raw.githubusercontent.com/nafigator/bash-helpers/master/src/bash-helpers.sh
	sudo chmod +x /usr/local/lib/bash/includes/bash-helpers.sh

	return 0
}

init_bash_helpers() {
	[[ -e /usr/local/lib/bash/includes/bash-helpers.sh ]] || download_bash_helpers

	if [[ ! -x /usr/local/lib/bash/includes/bash-helpers.sh ]]; then
		printf "Insufficient permissions for bash-helpers execute\n"; return 1
	fi

	. /usr/local/lib/bash/includes/bash-helpers.sh

	return 0
}

init_bash_helpers || exit 1

Composer installation

composer require nafigator/bash-helpers

Usage

1. Put bash libs into /usr/local/lib/bash/includes dir.
2. Source bash-helpers.sh in executable script:

   . /usr/local/lib/bash/includes/bash-helpers.sh

Features:

• Defines human-readable functions for colors and formatting:

  • black()
  • red()
  • green()
  • yellow()
  • blue()
  • magenta()
  • cyan()
  • white()
  • gray()
  • bold()
  • clr()

  Examples:

   printf "$(bold)$(red)ATTENTION$(clr) Save $(cyan)failure$(clr)"

  

  NOTE: For logging purpose colors may be disabled by global INTERACTIVE variable:

    INTERACTIVE=
  

• Functions for nicely formatted messages error, inform, warning.

  Examples:

   inform 'Script start'
   warning 'Make backup!'
   error 'File not found'

  

• Libs including.

  Example:

   include google/client || exit 1
   include mysql/query-builder || exit 1
   include logger; status 'Logger including' $? || exit 1

• Status messages.

  Example:

   test -d /usr/local/nonexistent
   status 'Check /usr/local/nonexistent dir' $?
   test -d /usr/local/bin
   status 'Check /usr/local/bin dir' $?

  

• Checking dependencies.

  Example:

   check_dependencies yarn rust || exit 1

  

• Debug messages and statuses.

  Example:

   debug 'This message is hidden'
   status_dbg 'This status is hidden' $?
   DEBUG=1
   debug 'Visible because of DEBUG variable'
   test -d /nonexists
   status_dbg 'Visible because of DEBUG variable' $?
   test -d /var/log
   status_dbg 'Visible because of DEBUG variable' $?

  

Message statuses

[ OK ] - success status
[FAIL] - fail status
[ ?? ] - debug message
[ ++ ] - success debug status
[ -- ] - fail debug status

Versioning

This software follows "Semantic Versioning" specifications. All function signatures declared as public API.

Read more on SemVer.org.