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Diffstat (limited to 'src')
| -rw-r--r-- | src/nix/main.cc | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/nix/main.cc b/src/nix/main.cc index 5056ceb78..a75f8ae65 100644 --- a/src/nix/main.cc +++ b/src/nix/main.cc @@ -149,6 +149,50 @@ struct NixArgs : virtual MultiCommand, virtual MixCommonArgs } }; +static void showHelp(std::vector<std::string> subcommand) +{ + showManPage(subcommand.empty() ? "nix" : fmt("nix3-%s", concatStringsSep("-", subcommand))); +} + +struct CmdHelp : Command +{ + std::vector<std::string> subcommand; + + CmdHelp() + { + expectArgs({ + .label = "subcommand", + .handler = {&subcommand}, + }); + } + + std::string description() override + { + return "show help about 'nix' or a particular subcommand"; + } + + Examples examples() override + { + return { + Example{ + "To show help about 'nix' in general:", + "nix help" + }, + Example{ + "To show help about a particular subcommand:", + "nix help run" + }, + }; + } + + void run() override + { + showHelp(subcommand); + } +}; + +static auto rCmdHelp = registerCommand<CmdHelp>("help"); + void mainWrapped(int argc, char * * argv) { /* The chroot helper needs to be run before any threads have been |