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
|
#include "command.hh"
#include "progress-bar.hh"
#include "shared.hh"
#include "store-api.hh"
#include "sync.hh"
#include "thread-pool.hh"
#include <atomic>
using namespace nix;
struct CmdCopy : StorePathsCommand
{
std::string srcUri, dstUri;
CmdCopy()
{
mkFlag(0, "from", "store-uri", "URI of the source Nix store", &srcUri);
mkFlag(0, "to", "store-uri", "URI of the destination Nix store", &dstUri);
}
std::string name() override
{
return "copy";
}
std::string description() override
{
return "copy paths between Nix stores";
}
Examples examples() override
{
return {
Example{
"To copy Firefox to the local store to a binary cache in file:///tmp/cache:",
"nix copy --to file:///tmp/cache -r $(type -p firefox)"
},
};
}
void run(ref<Store> store, Paths storePaths) override
{
if (srcUri.empty() && dstUri.empty())
throw UsageError("you must pass ‘--from’ and/or ‘--to’");
ref<Store> srcStore = srcUri.empty() ? store : openStoreAt(srcUri);
ref<Store> dstStore = dstUri.empty() ? store : openStoreAt(dstUri);
ProgressBar progressBar;
std::atomic<size_t> done{0};
std::atomic<size_t> total{storePaths.size()};
auto showProgress = [&]() {
return (format("[%d/%d copied]") % done % total).str();
};
progressBar.updateStatus(showProgress());
ThreadPool pool;
processGraph<Path>(pool,
PathSet(storePaths.begin(), storePaths.end()),
[&](const Path & storePath) {
return srcStore->queryPathInfo(storePath)->references;
},
[&](const Path & storePath) {
checkInterrupt();
if (!dstStore->isValidPath(storePath)) {
auto activity(progressBar.startActivity(format("copying ‘%s’...") % storePath));
StringSink sink;
srcStore->exportPaths({storePath}, false, sink);
StringSource source(*sink.s);
dstStore->importPaths(false, source, 0);
done++;
} else
total--;
progressBar.updateStatus(showProgress());
});
pool.process();
progressBar.done();
}
};
static RegisterCommand r1(make_ref<CmdCopy>());
|
