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Diffstat (limited to 'third_party/nix/src/nix/build.cc')
-rw-r--r-- | third_party/nix/src/nix/build.cc | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/third_party/nix/src/nix/build.cc b/third_party/nix/src/nix/build.cc new file mode 100644 index 000000000000..3fe74b7ffdba --- /dev/null +++ b/third_party/nix/src/nix/build.cc @@ -0,0 +1,68 @@ +#include "libmain/common-args.hh" +#include "libmain/shared.hh" +#include "libstore/store-api.hh" +#include "nix/command.hh" + +namespace nix { +struct CmdBuild final : MixDryRun, InstallablesCommand { + Path outLink = "result"; + + CmdBuild() { + mkFlag() + .longName("out-link") + .shortName('o') + .description("path of the symlink to the build result") + .labels({"path"}) + .dest(&outLink); + + mkFlag() + .longName("no-link") + .description("do not create a symlink to the build result") + .set(&outLink, Path("")); + } + + std::string name() override { return "build"; } + + std::string description() override { + return "build a derivation or fetch a store path"; + } + + Examples examples() override { + return { + Example{"To build and run GNU Hello from NixOS 17.03:", + "nix build -f channel:nixos-17.03 hello; ./result/bin/hello"}, + Example{"To build the build.x86_64-linux attribute from release.nix:", + "nix build -f release.nix build.x86_64-linux"}, + }; + } + + void run(ref<Store> store) override { + auto buildables = build(store, dryRun ? DryRun : Build, installables); + + if (dryRun) { + return; + } + + for (size_t i = 0; i < buildables.size(); ++i) { + auto& b(buildables[i]); + + if (!outLink.empty()) { + for (auto& output : b.outputs) { + if (auto store2 = store.dynamic_pointer_cast<LocalFSStore>()) { + std::string symlink = outLink; + if (i != 0u) { + symlink += fmt("-%d", i); + } + if (output.first != "out") { + symlink += fmt("-%s", output.first); + } + store2->addPermRoot(output.second, absPath(symlink), true); + } + } + } + } + } +}; +} // namespace nix + +static nix::RegisterCommand r1(nix::make_ref<nix::CmdBuild>()); |