diff options
Diffstat (limited to 'third_party/nix/src/nix/log.cc')
-rw-r--r-- | third_party/nix/src/nix/log.cc | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/third_party/nix/src/nix/log.cc b/third_party/nix/src/nix/log.cc new file mode 100644 index 000000000000..84207d8576ea --- /dev/null +++ b/third_party/nix/src/nix/log.cc @@ -0,0 +1,63 @@ +#include <glog/logging.h> + +#include "libmain/common-args.hh" +#include "libmain/shared.hh" +#include "libstore/store-api.hh" +#include "nix/command.hh" + +namespace nix { +struct CmdLog final : 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()); + } +}; +} // namespace nix + +static nix::RegisterCommand r1(nix::make_ref<nix::CmdLog>()); |