Overview

This is a collection of useful(ish) bash snippets. The snippets are all simple self-contained pieces of code (a class or subroutine), but non of them are large enough to require having a repository in their own right.

Bash Snippets

| Name | Description | | ------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------- | | abs.sh | The Math. abs() function returns the absolute value of a number. That is, it returns x if x is positive or zero, and the negation of x if x is negative. | | array-contains.sh | Check to see if an array contains a specific value. | | array-to-string.sh | Convert an array to a string with a custom separator and a final optional value. | | center-text.sh | Center any given text on the screen (optional define the screen width). | | check-prerequisites.sh | Check prerequisite commands are installed. | | compare-versions.sh | Compare two version strings with optional custom delimiter. | | contains.sh | Check to see if one string contains another. | | countdown.sh | Display a simple countdown timer and message. | | error-messages.sh | Display error, warning and success messages. | | get-confirmation.sh | Get user confirmation for an action. | | get-git-root.sh | Get the root directory of a given git repo (and handle correctly when it isn't a git repo). | | get-script-info.sh | Get information about a script (full path and script name). | | get-terraform-version.sh | Get the current terraform version. | | get-version-string.sh | Extract a semver version from a string. | | is-git-repo.sh | Check if a given directory contains a git repo. | | rollingback.sh | Using signals to create rollback functions for cleaner scripting. | | stacktrace.sh | Provide a stack trace for from main to the point of of calling the stacktrace. | | strict-mode.sh | An example of a 'strict' mode setup for bash scripts. | | sudo-librarian-puppet.sh | Run librarian-puppet via sudo without changing default sudoers file (Debian 9 / Puppet 5). | | terminal-or-not.sh | A script to allow to determine if your script is attached to a terminal, pipe or redirection. | | untag.sh | A simple script to remove ALL tags from a git repo. | | using-colour.sh | An example of how to use colour (see bash-colour-include for a full working solution). | | using-set.sh | Using 'set' for more robust shell scripting. | | variable-replace.sh | Replace template variables in a file with values from an associative array. | | verbose-mode.sh | Demonstration of script wide verbose/silent mode. |