Add support for variables in text for dynamic content

[bartreardon]

Not directly related but inspired by SecondSonConsulting/Baseline#46 @BigMacAdmin

Add variable support that generates a list of facts about a device that is able to be used wherever text can be used.

For example, common variables might be:

• computername
• computermodel
• serialnumber
• username
• osversion
• osname
• osrevision
  ...etc

It could also be possible to use any named environment variable, including any custom ones.

Example usage

You could specify a line of text or .md file with variables you wish to populate:

You are running macOS {osname} on revision {osrevision} and your hardware is a {computermodel}

This would result in the following (example):

You are running macOS Sonoma on revision 14.4.1 and your hardware is a MacBookPro18,3

Custom variables could be supported provided they were exported prior to execution. unpopulated variables would result in blank output

export custominformation="<custom content here>"

which could then be used

Custom information contents is {custominformation}

Use case?

Rather than generating this info on the fly and customising content to be displayed prior to running swiftDialog, you could use boilerplate text that calls on this information and populates it for you.

If everything is contained in a shell script this might be less useful but given the capability of using a markdown file sourced from a URL, it could be desirable to populate the markdown file with variable names that swiftDialog will replace on the fly and reducing the need to include any pre-processing of text to populate dynamic content.

[BigMacAdmin]

Also useful: {Full Name} id -F

[bartreardon]

implemented in v2.5.0