1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
#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>());
|
