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#include "command.hh"
#include "common-args.hh"
#include "shared.hh"
#include "store-api.hh"
#include "progress-bar.hh"
using namespace nix;
struct CmdLog : InstallableCommand
{
CmdLog()
{
}
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 != "" ? sub->getBuildLog(b.drvPath) : nullptr;
for (auto & output : b.outputs) {
if (log) break;
log = sub->getBuildLog(output.second);
}
if (!log) continue;
stopProgressBar();
printInfo("got build log for '%s' from '%s'", installable->what(), 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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