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#include <glog/logging.h>
#include "libmain/common-args.hh"
#include "libmain/shared.hh"
#include "libstore/store-api.hh"
#include "nix/command.hh"
using namespace nix;
struct CmdLog : InstallableCommand {
CmdLog() = default;
std::string name() override { return "log"; }
std::string description() override {
return "show the build log of the specified packages or paths, if "
"available";
}
Examples examples() override {
return {
Example{"To get the build log of GNU Hello:", "nix log nixpkgs.hello"},
Example{
"To get the build log of a specific path:",
"nix log "
"/nix/store/lmngj4wcm9rkv3w4dfhzhcyij3195hiq-thunderbird-52.2.1"},
Example{"To get a build log from a specific binary cache:",
"nix log --store https://cache.nixos.org nixpkgs.hello"},
};
}
void run(ref<Store> store) override {
settings.readOnlyMode = true;
auto subs = getDefaultSubstituters();
subs.push_front(store);
auto b = installable->toBuildable();
RunPager pager;
for (auto& sub : subs) {
auto log = !b.drvPath.empty() ? sub->getBuildLog(b.drvPath) : nullptr;
for (auto& output : b.outputs) {
if (log) {
break;
}
log = sub->getBuildLog(output.second);
}
if (!log) {
continue;
}
LOG(INFO) << "got build log for '" << installable->what() << "' from '"
<< sub->getUri() << "'";
std::cout << *log;
return;
}
throw Error("build log of '%s' is not available", installable->what());
}
};
static RegisterCommand r1(make_ref<CmdLog>());
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