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
|
#include "fetchers.hh"
#include "store-api.hh"
#include <nlohmann/json.hpp>
namespace nix::fetchers {
std::unique_ptr<std::vector<std::unique_ptr<InputScheme>>> inputSchemes = nullptr;
void registerInputScheme(std::unique_ptr<InputScheme> && inputScheme)
{
if (!inputSchemes) inputSchemes = std::make_unique<std::vector<std::unique_ptr<InputScheme>>>();
inputSchemes->push_back(std::move(inputScheme));
}
std::unique_ptr<Input> inputFromURL(const ParsedURL & url)
{
for (auto & inputScheme : *inputSchemes) {
auto res = inputScheme->inputFromURL(url);
if (res) return res;
}
throw Error("input '%s' is unsupported", url.url);
}
std::unique_ptr<Input> inputFromURL(const std::string & url)
{
return inputFromURL(parseURL(url));
}
std::unique_ptr<Input> inputFromAttrs(const Attrs & attrs)
{
auto attrs2(attrs);
attrs2.erase("narHash");
for (auto & inputScheme : *inputSchemes) {
auto res = inputScheme->inputFromAttrs(attrs2);
if (res) {
if (auto narHash = maybeGetStrAttr(attrs, "narHash"))
res->narHash = Hash::parseSRI(*narHash);
return res;
}
}
throw Error("input '%s' is unsupported", attrsToJson(attrs));
}
Attrs Input::toAttrs() const
{
auto attrs = toAttrsInternal();
if (narHash)
attrs.emplace("narHash", narHash->to_string(SRI, true));
attrs.emplace("type", type());
return attrs;
}
std::pair<Tree, std::shared_ptr<const Input>> Input::fetchTree(ref<Store> store) const
{
auto [tree, input] = fetchTreeInternal(store);
if (tree.actualPath == "")
tree.actualPath = store->toRealPath(tree.storePath);
if (!tree.info.narHash)
tree.info.narHash = store->queryPathInfo(tree.storePath)->narHash;
if (input->narHash)
assert(input->narHash == tree.info.narHash);
if (narHash && narHash != input->narHash)
throw Error("NAR hash mismatch in input '%s' (%s), expected '%s', got '%s'",
to_string(), tree.actualPath, narHash->to_string(SRI, true), input->narHash->to_string(SRI, true));
return {std::move(tree), input};
}
}
|
