Eelco Dolstra 785cb3a754 refactor(tvix): getEnv(): Return std::optional ... This allows distinguishing between an empty value and no value. Patch ported from upstream at ba87b08f85 Change-Id: I061cc8e16b1a7a0341adfc3b0edca1c0c51d5c97 Reviewed-on: https://cl.tvl.fyi/c/depot/+/1884 Tested-by: BuildkiteCI Reviewed-by: kanepyork <rikingcoding@gmail.com>		2020-09-01 02:21:53 +00:00
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nix-build.cc	refactor(tvix): getEnv(): Return std::optional	2020-09-01 02:21:53 +00:00