How can I pass values into a spec during compile?

[laduke]

I for example, want to pass a version into my service definition

@service({
  title: "My Service",
  version: {VersionFromSomewhere},
})

I can get the value into an env var, a cli flag, even a .js file, but I haven't been able to figure out how to import/ interpolate it into the tsp file.

[bterlson]

This is not a feature we have, but could be added, I've filed an issue. The best thing I can think of is generating a "variables.tsp" out of band that you import into your spec.

[laduke]

thanks!

simplest templating I could come up with without adding any new tooling:

    "variables": "printf 'alias Version = \"%s\";\n' $npm_package_version > variables.tsp",

npm run variables
cat variables.tsp          
alias Version = "1.0.1";