Tool driving

What is the common in scripts.

• Version printer.
• Help printer.
• Arguments count must be proper.
• Arguments are taken into tuples (what, what value).
• Arguments have well known types in libraries for CLIs.
• Script contains main method.
• Scripts contain echo step by step explanation.
• Scripts contain colouring statements.
• Scripts call blobs.
• Scripts source files.
• Scripts use flags (set -eu).
• Scripts have a starting untold directory.
• Scripts have a way to know where they are placed at (dirname (status –current-filename)).
• Scripts have a $status, $? mechanism.
• Scripts do not scale.