nix-gh/src/libmain/common-args.cc
Eelco Dolstra 7b9c68766d
Add '--no-net' convenience flag
This flag

* Disables substituters.

* Sets the tarball-ttl to infinity (ensuring e.g. that the flake
  registry and any downloaded flakes are considered current).

* Disables retrying downloads and sets the connection timeout to the
  minimum. (So it doesn't completely disable downloads at the moment.)

(cherry picked from commit 8ea842260b4fd93315d35c5ba94b1ff99ab391d8)
2019-06-24 22:07:29 +02:00

68 lines
1.9 KiB
C++

#include "common-args.hh"
#include "globals.hh"
#include "download.hh"
namespace nix {
MixCommonArgs::MixCommonArgs(const string & programName)
: programName(programName)
{
mkFlag()
.longName("verbose")
.shortName('v')
.description("increase verbosity level")
.handler([]() { verbosity = (Verbosity) (verbosity + 1); });
mkFlag()
.longName("quiet")
.description("decrease verbosity level")
.handler([]() { verbosity = verbosity > lvlError ? (Verbosity) (verbosity - 1) : lvlError; });
mkFlag()
.longName("debug")
.description("enable debug output")
.handler([]() { verbosity = lvlDebug; });
mkFlag()
.longName("option")
.labels({"name", "value"})
.description("set a Nix configuration option (overriding nix.conf)")
.arity(2)
.handler([](std::vector<std::string> ss) {
try {
globalConfig.set(ss[0], ss[1]);
} catch (UsageError & e) {
warn(e.what());
}
});
mkFlag()
.longName("max-jobs")
.shortName('j')
.label("jobs")
.description("maximum number of parallel builds")
.handler([=](std::string s) {
settings.set("max-jobs", s);
});
mkFlag()
.longName("no-net")
.description("disable substituters and consider all previously downloaded files up-to-date")
.handler([]() {
settings.useSubstitutes = false;
settings.tarballTtl = std::numeric_limits<unsigned int>::max();
downloadSettings.tries = 0;
downloadSettings.connectTimeout = 1;
});
std::string cat = "config";
globalConfig.convertToArgs(*this, cat);
// Backward compatibility hack: nix-env already had a --system flag.
if (programName == "nix-env") longFlags.erase("system");
hiddenCategories.insert(cat);
}
}