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| author | Eelco Dolstra <edolstra@gmail.com> | 2019-11-22T15·06+0100 |
|---|---|---|
| committer | glittershark <grfn@gws.fyi> | 2020-09-01T02·21+0000 |
| commit | 785cb3a75476033ba6eec2fef334d47d8e64388a (patch) | |
| tree | 676d53868e29e0ab28443b9d13019c54754012f7 /third_party/nix/src/libutil/util.hh | |
| parent | c5f3b12f0484cd1a5152b6c64a336e9852d7c484 (diff) | |
refactor(tvix): getEnv(): Return std::optional r/1756
This allows distinguishing between an empty value and no value. Patch ported from upstream at https://github.com/NixOS/nix/commit/ba87b08f8529e4d9f8c58d8c625152058ceadb75 Change-Id: I061cc8e16b1a7a0341adfc3b0edca1c0c51d5c97 Reviewed-on: https://cl.tvl.fyi/c/depot/+/1884 Tested-by: BuildkiteCI Reviewed-by: kanepyork <rikingcoding@gmail.com>
Diffstat (limited to 'third_party/nix/src/libutil/util.hh')
| -rw-r--r-- | third_party/nix/src/libutil/util.hh | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/third_party/nix/src/libutil/util.hh b/third_party/nix/src/libutil/util.hh index b6d726b46c..b3349c4f39 100644 --- a/third_party/nix/src/libutil/util.hh +++ b/third_party/nix/src/libutil/util.hh @@ -26,7 +26,7 @@ struct Source; extern const std::string nativeSystem; /* Return an environment variable. */ -std::string getEnv(const std::string& key, const std::string& def = ""); +std::optional<std::string> getEnv(const std::string& key); /* Get the entire environment. */ std::map<std::string, std::string> getEnv(); |