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
|
#include "fetchers.hh"
#include "store-api.hh"
#include "archive.hh"
namespace nix::fetchers {
struct PathInputScheme : InputScheme
{
std::optional<Input> inputFromURL(const ParsedURL & url) const override
{
if (url.scheme != "path") return {};
if (url.authority && *url.authority != "")
throw Error("path URL '%s' should not have an authority ('%s')", url.url, *url.authority);
Input input;
input.attrs.insert_or_assign("type", "path");
input.attrs.insert_or_assign("path", url.path);
for (auto & [name, value] : url.query)
if (name == "rev" || name == "narHash")
input.attrs.insert_or_assign(name, value);
else if (name == "revCount" || name == "lastModified") {
if (auto n = string2Int<uint64_t>(value))
input.attrs.insert_or_assign(name, *n);
else
throw Error("path URL '%s' has invalid parameter '%s'", url.to_string(), name);
}
else
throw Error("path URL '%s' has unsupported parameter '%s'", url.to_string(), name);
return input;
}
std::optional<Input> inputFromAttrs(const Attrs & attrs) const override
{
if (maybeGetStrAttr(attrs, "type") != "path") return {};
getStrAttr(attrs, "path");
for (auto & [name, value] : attrs)
/* Allow the user to pass in "fake" tree info
attributes. This is useful for making a pinned tree
work the same as the repository from which is exported
(e.g. path:/nix/store/...-source?lastModified=1585388205&rev=b0c285...). */
if (name == "type" || name == "rev" || name == "revCount" || name == "lastModified" || name == "narHash" || name == "path")
// checked in Input::fromAttrs
;
else
throw Error("unsupported path input attribute '%s'", name);
Input input;
input.attrs = attrs;
return input;
}
ParsedURL toURL(const Input & input) const override
{
auto query = attrsToQuery(input.attrs);
query.erase("path");
query.erase("type");
return ParsedURL {
.scheme = "path",
.path = getStrAttr(input.attrs, "path"),
.query = query,
};
}
bool hasAllInfo(const Input & input) const override
{
return true;
}
std::optional<Path> getSourcePath(const Input & input) override
{
return getStrAttr(input.attrs, "path");
}
void markChangedFile(const Input & input, std::string_view file, std::optional<std::string> commitMsg) override
{
// nothing to do
}
std::pair<StorePath, Input> fetch(ref<Store> store, const Input & _input) override
{
Input input(_input);
std::string absPath;
auto path = getStrAttr(input.attrs, "path");
if (path[0] != '/') {
if (!input.parent)
throw Error("cannot fetch input '%s' because it uses a relative path", input.to_string());
auto parent = canonPath(*input.parent);
// the path isn't relative, prefix it
absPath = nix::absPath(path, parent);
// for security, ensure that if the parent is a store path, it's inside it
if (store->isInStore(parent)) {
auto storePath = store->printStorePath(store->toStorePath(parent).first);
if (!isDirOrInDir(absPath, storePath))
throw BadStorePath("relative path '%s' points outside of its parent's store path '%s'", path, storePath);
}
} else
absPath = path;
Activity act(*logger, lvlTalkative, actUnknown, fmt("copying '%s'", absPath));
// FIXME: check whether access to 'path' is allowed.
auto storePath = store->maybeParseStorePath(absPath);
if (storePath)
store->addTempRoot(*storePath);
time_t mtime = 0;
if (!storePath || storePath->name() != "source" || !store->isValidPath(*storePath)) {
// FIXME: try to substitute storePath.
auto src = sinkToSource([&](Sink & sink) {
mtime = dumpPathAndGetMtime(absPath, sink, defaultPathFilter);
});
storePath = store->addToStoreFromDump(*src, "source");
}
input.attrs.insert_or_assign("lastModified", uint64_t(mtime));
return {std::move(*storePath), input};
}
};
static auto rPathInputScheme = OnStartup([] { registerInputScheme(std::make_unique<PathInputScheme>()); });
}
|
