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
|
#include "command.hh"
#include "store-api.hh"
#include "derivations.hh"
namespace nix {
Commands * RegisterCommand::commands = 0;
void Command::printHelp(const string & programName, std::ostream & out)
{
Args::printHelp(programName, out);
auto exs = examples();
if (!exs.empty()) {
out << "\n";
out << "Examples:\n";
for (auto & ex : exs)
out << "\n"
<< " " << ex.description << "\n" // FIXME: wrap
<< " $ " << ex.command << "\n";
}
}
MultiCommand::MultiCommand(const Commands & _commands)
: commands(_commands)
{
expectedArgs.push_back(ExpectedArg{"command", 1, true, [=](Strings ss) {
assert(!command);
auto i = commands.find(ss.front());
if (i == commands.end())
throw UsageError(format("‘%1%’ is not a recognised command") % ss.front());
command = i->second;
}});
}
void MultiCommand::printHelp(const string & programName, std::ostream & out)
{
if (command) {
command->printHelp(programName + " " + command->name(), out);
return;
}
out << "Usage: " << programName << " <COMMAND> <FLAGS>... <ARGS>...\n";
out << "\n";
out << "Common flags:\n";
printFlags(out);
out << "\n";
out << "Available commands:\n";
Table2 table;
for (auto & command : commands)
table.push_back(std::make_pair(command.second->name(), command.second->description()));
printTable(out, table);
out << "\n";
out << "For full documentation, run ‘man " << programName << "’ or ‘man " << programName << "-<COMMAND>’.\n";
}
bool MultiCommand::processFlag(Strings::iterator & pos, Strings::iterator end)
{
if (Args::processFlag(pos, end)) return true;
if (command && command->processFlag(pos, end)) return true;
return false;
}
bool MultiCommand::processArgs(const Strings & args, bool finish)
{
if (command)
return command->processArgs(args, finish);
else
return Args::processArgs(args, finish);
}
StoreCommand::StoreCommand()
{
storeUri = getEnv("NIX_REMOTE");
mkFlag(0, "store", "store-uri", "URI of the Nix store to use", &storeUri);
}
ref<Store> StoreCommand::getStore()
{
if (!_store)
_store = createStore();
return ref<Store>(_store);
}
ref<Store> StoreCommand::createStore()
{
return openStore(storeUri);
}
void StoreCommand::run()
{
run(createStore());
}
StorePathsCommand::StorePathsCommand()
{
mkFlag('r', "recursive", "apply operation to closure of the specified paths", &recursive);
mkFlag(0, "all", "apply operation to the entire store", &all);
}
void StorePathsCommand::run(ref<Store> store)
{
Paths storePaths;
if (all) {
if (installables.size())
throw UsageError("‘--all’ does not expect arguments");
for (auto & p : store->queryAllValidPaths())
storePaths.push_back(p);
}
else {
for (auto & p : buildInstallables(store, false))
storePaths.push_back(p);
if (recursive) {
PathSet closure;
store->computeFSClosure(PathSet(storePaths.begin(), storePaths.end()),
closure, false, false);
storePaths = Paths(closure.begin(), closure.end());
}
}
run(store, storePaths);
}
void StorePathCommand::run(ref<Store> store)
{
auto storePaths = buildInstallables(store, false);
if (storePaths.size() != 1)
throw UsageError("this command requires exactly one store path");
run(store, *storePaths.begin());
}
}
|
