forked from lix-project/lix
990b5b2dcf
This replaces 'nix-env --set'. For example:
$ nix build --profile /nix/var/nix/profiles/system \
~/Misc/eelco-configurations:nixosConfigurations.vyr.config.system.build.toplevel
updates the NixOS system profile from a flake.
This could have been a separate command (e.g. 'nix set-profile') but
1) '--profile' is pretty similar to '--out-link'; and 2) '--profile'
could be useful for other command (like 'nix dev-shell').
76 lines
2.2 KiB
C++
76 lines
2.2 KiB
C++
#include "eval.hh"
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#include "command.hh"
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#include "common-args.hh"
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#include "shared.hh"
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#include "store-api.hh"
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using namespace nix;
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struct CmdBuild : MixDryRun, MixProfile, InstallablesCommand
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{
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Path outLink = "result";
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CmdBuild()
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{
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mkFlag()
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.longName("out-link")
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.shortName('o')
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.description("path of the symlink to the build result")
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.labels({"path"})
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.dest(&outLink);
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mkFlag()
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.longName("no-link")
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.description("do not create a symlink to the build result")
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.set(&outLink, Path(""));
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}
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std::string description() override
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{
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return "build a derivation or fetch a store path";
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}
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Examples examples() override
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{
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return {
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Example{
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"To build and run GNU Hello from NixOS 17.03:",
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"nix build -f channel:nixos-17.03 hello; ./result/bin/hello"
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},
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Example{
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"To build the build.x86_64-linux attribute from release.nix:",
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"nix build -f release.nix build.x86_64-linux"
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},
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Example{
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"To make a profile point at GNU Hello:",
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"nix build --profile /tmp/profile nixpkgs:hello"
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},
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};
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}
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void run(ref<Store> store) override
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{
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auto buildables = build(store, dryRun ? DryRun : Build, installables);
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auto evalState = std::make_shared<EvalState>(searchPath, store);
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evalState->addRegistryOverrides(registryOverrides);
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if (dryRun) return;
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if (outLink != "") {
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for (size_t i = 0; i < buildables.size(); ++i) {
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for (auto & output : buildables[i].outputs)
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if (auto store2 = store.dynamic_pointer_cast<LocalFSStore>()) {
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std::string symlink = outLink;
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if (i) symlink += fmt("-%d", i);
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if (output.first != "out") symlink += fmt("-%s", output.first);
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store2->addPermRoot(output.second, absPath(symlink), true);
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}
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}
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}
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updateProfile(buildables);
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}
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};
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static auto r1 = registerCommand<CmdBuild>("build");
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