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#include "primops/flake.hh"
#include "eval.hh"
#include "command.hh"
#include "common-args.hh"
#include "shared.hh"
#include "store-api.hh"
using namespace nix;
struct CmdBuild : MixDryRun, InstallablesCommand
{
Path outLink = "result";
std::optional<std::string> flakeUri = std::nullopt;
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(""));
mkFlag()
.longName("flake")
.description("update lock file of given flake")
.dest(&flakeUri);
}
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);
auto evalState = std::make_shared<EvalState>(searchPath, store);
if (dryRun) return;
for (size_t i = 0; i < buildables.size(); ++i) {
auto & b(buildables[i]);
if (outLink != "")
for (auto & output : b.outputs)
if (auto store2 = store.dynamic_pointer_cast<LocalFSStore>()) {
std::string symlink = outLink;
if (i) symlink += fmt("-%d", i);
if (output.first != "out") symlink += fmt("-%s", output.first);
store2->addPermRoot(output.second, absPath(symlink), true);
}
}
if (flakeUri) {
updateLockFile(*evalState, *flakeUri);
}
}
};
static RegisterCommand r1(make_ref<CmdBuild>());
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