No substitution when a var is assigned to itself

[huntc]

Variable expansion of an externally declared variable does not appear to occur when assigned back to the same variable name e.g. given the declaration of GITHUB_TOKEN, in my .env file:

GITHUB_TOKEN="$GITHUB_TOKEN"

...then show envFromFile from within the sbt session reveals:

[info] 	Map(GITHUB_TOKEN -> $GITHUB_TOKEN)

i.e. the token is not substituted where GITHUB_TOKEN has been declared prior to invoking sbt.

I'm not certain, but I think the following line is causing a problem:

      VariableExpansion.expandAllVars(sys.env ++ environment, environment)

i.e. the fact that environment is appended to sys.env.

[mefellows]

Thanks for raising, and apologies for my slow response. I don't spend much time on this these days, but if you care to submit a PR we'd be happy to bring it in.

P.S. interesting background, and hello fellow Aussie :)

[huntc]

Thanks @mefellows ! I’ll try and get a PR in!