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nix eval: Add examples

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This commit is contained in:
Eelco Dolstra 2017-09-07 20:37:46 +02:00
parent 2ebeffcfd4
commit 4967f0509a
1 changed files with 18 additions and 0 deletions
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18
src/nix/eval.cc
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@ -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)