forked from lix-project/lix
a24f2c9b84
This is a convenience command to allow users who are not privileged to create /nix/store to use Nix with regular binary caches. For example, $ NIX_REMOTE="local?state=$HOME/nix/var&real=/$HOME/nix/store" nix run firefox bashInteractive will download Firefox and bash from cache.nixos.org, then start a shell in which $HOME/nix/store is mounted on /nix/store.
83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
#include "command.hh"
|
||
#include "common-args.hh"
|
||
#include "installables.hh"
|
||
#include "shared.hh"
|
||
#include "store-api.hh"
|
||
#include "derivations.hh"
|
||
#include "local-store.hh"
|
||
|
||
#if __linux__
|
||
#include <sys/mount.h>
|
||
#endif
|
||
|
||
using namespace nix;
|
||
|
||
struct CmdRun : StoreCommand, MixInstallables
|
||
{
|
||
CmdRun()
|
||
{
|
||
}
|
||
|
||
std::string name() override
|
||
{
|
||
return "run";
|
||
}
|
||
|
||
std::string description() override
|
||
{
|
||
return "run a shell in which the specified packages are available";
|
||
}
|
||
|
||
void run(ref<Store> store) override
|
||
{
|
||
auto elems = evalInstallables(store);
|
||
|
||
PathSet pathsToBuild;
|
||
|
||
for (auto & elem : elems) {
|
||
if (elem.isDrv)
|
||
pathsToBuild.insert(elem.drvPath);
|
||
else
|
||
pathsToBuild.insert(elem.outPaths.begin(), elem.outPaths.end());
|
||
}
|
||
|
||
printMissing(store, pathsToBuild);
|
||
|
||
store->buildPaths(pathsToBuild);
|
||
|
||
auto store2 = store.dynamic_pointer_cast<LocalStore>();
|
||
|
||
if (store2 && store->storeDir != store2->realStoreDir) {
|
||
#if __linux__
|
||
if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == -1)
|
||
throw SysError("setting up a private mount namespace");
|
||
|
||
if (mount(store2->realStoreDir.c_str(), store->storeDir.c_str(), "", MS_BIND, 0) == -1)
|
||
throw SysError(format("mounting ‘%s’ on ‘%s’") % store2->realStoreDir % store->storeDir);
|
||
#else
|
||
throw Error(format("mounting the Nix store on ‘%s’ is not supported on this platform") % store->storeDir);
|
||
#endif
|
||
}
|
||
|
||
PathSet outPaths;
|
||
for (auto & path : pathsToBuild)
|
||
if (isDerivation(path)) {
|
||
Derivation drv = store->derivationFromPath(path);
|
||
for (auto & output : drv.outputs)
|
||
outPaths.insert(output.second.path);
|
||
} else
|
||
outPaths.insert(path);
|
||
|
||
auto unixPath = tokenizeString<Strings>(getEnv("PATH"), ":");
|
||
for (auto & path : outPaths)
|
||
if (pathExists(path + "/bin"))
|
||
unixPath.push_front(path + "/bin");
|
||
setenv("PATH", concatStringsSep(":", unixPath).c_str(), 1);
|
||
|
||
if (execlp("bash", "bash", nullptr) == -1)
|
||
throw SysError("unable to exec ‘bash’");
|
||
}
|
||
};
|
||
|
||
static RegisterCommand r1(make_ref<CmdRun>());
|