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| -rw-r--r-- | src/nix/eval.cc | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/nix/eval.cc b/src/nix/eval.cc index 981cefa800c4..e22128692630 100644 --- a/src/nix/eval.cc +++ b/src/nix/eval.cc @@ -27,6 +27,24 @@ struct CmdEval : MixJSON, InstallablesCommand return "evaluate a Nix expression"; } + Examples examples() override + { + return { + Example{ + "To evaluate a Nix expression given on the command line:", + "nix eval '(1 + 2)'" + }, + Example{ + "To evaluate a Nix expression from a file or URI:", + "nix eval -f channel:nixos-17.09 hello.name" + }, + Example{ + "To get the current version of Nixpkgs:", + "nix eval --raw nixpkgs.lib.nixpkgsVersion" + }, + }; + } + void run(ref<Store> store) override { if (raw && json) |