Substitutions using file content

[davlee1972]

A variable substitution can be a token or a environmental variable.

Can we also check if the variable is a file and read the contents of the file?

Example:

rsakey: ${"/home/my_login/.ssh/rsa_key.p8"}

[davlee1972]

There is an existing proposal on the lightbend GitHub to support this type of functionality with a new include contents syntax.

rsakey: include contents("/home/my_login/.ssh/rsa_key.p8")

[davlee1972]

Additional discussions here:

https://groups.google.com/g/play-framework-dev/c/t2g-TWbqtzY