lix/src/nix/log.cc

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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
{
std::string description() override
{
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return "show the build log of the specified packages or paths, if available";
}
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std::string doc() override
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{
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return
#include "log.md"
;
}
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Category category() override { return catSecondary; }
void run(ref<Store> store) override
{
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settings.readOnlyMode = true;
auto subs = getDefaultSubstituters();
subs.push_front(store);
auto b = installable->toDerivedPath();
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RunPager pager;
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for (auto & sub : subs) {
auto log = std::visit(overloaded {
[&](const DerivedPath::Opaque & bo) {
return sub->getBuildLog(bo.path);
},
[&](const DerivedPath::Built & bfd) {
return sub->getBuildLog(bfd.drvPath);
},
}, b.raw());
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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 auto rCmdLog = registerCommand<CmdLog>("log");