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
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
#include <algorithm>
#include "command.hh"
#include "common-args.hh"
#include "eval.hh"
#include "globals.hh"
#include "legacy.hh"
#include "shared.hh"
#include "store-api.hh"
#include "progress-bar.hh"
#include "download.hh"
#include "finally.hh"
#include <sys/types.h>
#include <sys/socket.h>
#include <ifaddrs.h>
#include <netdb.h>
extern std::string chrootHelperName;
void chrootHelper(int argc, char * * argv);
namespace nix {
/* Check if we have a non-loopback/link-local network interface. */
static bool haveInternet()
{
struct ifaddrs * addrs;
if (getifaddrs(&addrs))
return true;
Finally free([&]() { freeifaddrs(addrs); });
for (auto i = addrs; i; i = i->ifa_next) {
if (!i->ifa_addr) continue;
if (i->ifa_addr->sa_family == AF_INET) {
if (ntohl(((sockaddr_in *) i->ifa_addr)->sin_addr.s_addr) != INADDR_LOOPBACK) {
return true;
}
} else if (i->ifa_addr->sa_family == AF_INET6) {
if (!IN6_IS_ADDR_LOOPBACK(((sockaddr_in6 *) i->ifa_addr)->sin6_addr.s6_addr) &&
!IN6_IS_ADDR_LINKLOCAL(((sockaddr_in6 *) i->ifa_addr)->sin6_addr.s6_addr))
return true;
}
}
return false;
}
std::string programPath;
struct NixArgs : virtual MultiCommand, virtual MixCommonArgs
{
bool printBuildLogs = false;
bool useNet = true;
NixArgs() : MultiCommand(*RegisterCommand::commands), MixCommonArgs("nix")
{
mkFlag()
.longName("help")
.description("show usage information")
.handler([&]() { showHelpAndExit(); });
mkFlag()
.longName("help-config")
.description("show configuration options")
.handler([&]() {
std::cout << "The following configuration options are available:\n\n";
Table2 tbl;
std::map<std::string, Config::SettingInfo> settings;
globalConfig.getSettings(settings);
for (const auto & s : settings)
tbl.emplace_back(s.first, s.second.description);
printTable(std::cout, tbl);
throw Exit();
});
mkFlag()
.longName("print-build-logs")
.shortName('L')
.description("print full build logs on stderr")
.set(&printBuildLogs, true);
mkFlag()
.longName("version")
.description("show version information")
.handler([&]() { printVersion(programName); });
mkFlag()
.longName("no-net")
.description("disable substituters and consider all previously downloaded files up-to-date")
.handler([&]() { useNet = false; });
}
void printFlags(std::ostream & out) override
{
Args::printFlags(out);
std::cout <<
"\n"
"In addition, most configuration settings can be overriden using '--<name> <value>'.\n"
"Boolean settings can be overriden using '--<name>' or '--no-<name>'. See 'nix\n"
"--help-config' for a list of configuration settings.\n";
}
void showHelpAndExit()
{
printHelp(programName, std::cout);
std::cout << "\nNote: this program is EXPERIMENTAL and subject to change.\n";
throw Exit();
}
};
void mainWrapped(int argc, char * * argv)
{
/* The chroot helper needs to be run before any threads have been
started. */
if (argc > 0 && argv[0] == chrootHelperName) {
chrootHelper(argc, argv);
return;
}
initNix();
initGC();
programPath = argv[0];
string programName = baseNameOf(programPath);
{
auto legacy = (*RegisterLegacyCommand::commands)[programName];
if (legacy) return legacy(argc, argv);
}
verbosity = lvlWarn;
settings.verboseBuild = false;
NixArgs args;
args.parseCmdline(argvToStrings(argc, argv));
initPlugins();
if (!args.command) args.showHelpAndExit();
Finally f([]() { stopProgressBar(); });
startProgressBar(args.printBuildLogs);
if (args.useNet && !haveInternet()) {
warn("you don't have Internet access; disabling some network-dependent features");
args.useNet = false;
}
if (!args.useNet) {
// FIXME: should check for command line overrides only.
if (!settings.useSubstitutes.overriden)
settings.useSubstitutes = false;
if (!settings.tarballTtl.overriden)
settings.tarballTtl = std::numeric_limits<unsigned int>::max();
if (!downloadSettings.tries.overriden)
downloadSettings.tries = 0;
if (!downloadSettings.connectTimeout.overriden)
downloadSettings.connectTimeout = 1;
}
args.command->prepare();
args.command->run();
}
}
int main(int argc, char * * argv)
{
return nix::handleExceptions(argv[0], [&]() {
nix::mainWrapped(argc, argv);
});
}
|
