Request: Execute Commands in Templates

[bradennapier]

I have run into a few situations where it would be very helpful to allow executing of a command rather than substitution of a variable when running a template (with the ability to use variables if possible. I can of course set the variables before running the template, but in situations where I use the template from multiple procedures and need to update a value it definitely will be greatly beneficial to have.

I was thinking if there is a worry about substituting the commands directly that perhaps appending C could mean that it should also run any commands in the string? I could of course create all those situations where I just have a variable to directly reference but there are often times that ends up running into some messy situations, especially since many times i want to reference something that is not stored as a directly accessible variable.

Just a thought, obviously easy enough to work around it - just feel it kind of fits into the concept.

{
    "authToken": "~SC:[authToken]",
    "localTimestamp": "~NC:[clock milliseconds]",
    "payload": "~TC:[dict get $::JSON::Templates $request]"
 }

Obviously this also opens some other interesting capabilities like generating templates through return values of commands, etc.

[apnadkarni]

An alternative for this use case might be to just use variable traces. Add a read trace on a variable that maps to the command you want to execute. The existing syntax need not change.