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
|
#include "installables.hh"
#include "store-api.hh"
#include "eval-inline.hh"
#include "eval-cache.hh"
#include "names.hh"
#include "command.hh"
#include "derivations.hh"
namespace nix {
struct InstallableDerivedPath : Installable
{
ref<Store> store;
const DerivedPath derivedPath;
InstallableDerivedPath(ref<Store> store, const DerivedPath & derivedPath)
: store(store)
, derivedPath(derivedPath)
{
}
std::string what() const override { return derivedPath.to_string(*store); }
DerivedPaths toDerivedPaths() override
{
return {derivedPath};
}
std::optional<StorePath> getStorePath() override
{
return std::nullopt;
}
};
/**
* Return the rewrites that are needed to resolve a string whose context is
* included in `dependencies`.
*/
StringPairs resolveRewrites(Store & store, const BuiltPaths dependencies)
{
StringPairs res;
for (auto & dep : dependencies)
if (auto drvDep = std::get_if<BuiltPathBuilt>(&dep))
for (auto & [ outputName, outputPath ] : drvDep->outputs)
res.emplace(
downstreamPlaceholder(store, drvDep->drvPath, outputName),
store.printStorePath(outputPath)
);
return res;
}
/**
* Resolve the given string assuming the given context.
*/
std::string resolveString(Store & store, const std::string & toResolve, const BuiltPaths dependencies)
{
auto rewrites = resolveRewrites(store, dependencies);
return rewriteStrings(toResolve, rewrites);
}
UnresolvedApp Installable::toApp(EvalState & state)
{
auto cursor = getCursor(state);
auto attrPath = cursor->getAttrPath();
auto type = cursor->getAttr("type")->getString();
std::string expected = !attrPath.empty() && state.symbols[attrPath[0]] == "apps" ? "app" : "derivation";
if (type != expected)
throw Error("attribute '%s' should have type '%s'", cursor->getAttrPathStr(), expected);
if (type == "app") {
auto [program, context] = cursor->getAttr("program")->getStringWithContext();
std::vector<StorePathWithOutputs> context2;
for (auto & [path, name] : context)
context2.push_back({path, {name}});
return UnresolvedApp{App {
.context = std::move(context2),
.program = program,
}};
}
else if (type == "derivation") {
auto drvPath = cursor->forceDerivation();
auto outPath = cursor->getAttr("outPath")->getString();
auto outputName = cursor->getAttr("outputName")->getString();
auto name = cursor->getAttr("name")->getString();
auto aPname = cursor->maybeGetAttr("pname");
auto aMeta = cursor->maybeGetAttr("meta");
auto aMainProgram = aMeta ? aMeta->maybeGetAttr("mainProgram") : nullptr;
auto mainProgram =
aMainProgram
? aMainProgram->getString()
: aPname
? aPname->getString()
: DrvName(name).name;
auto program = outPath + "/bin/" + mainProgram;
return UnresolvedApp { App {
.context = { { drvPath, {outputName} } },
.program = program,
}};
}
else
throw Error("attribute '%s' has unsupported type '%s'", cursor->getAttrPathStr(), type);
}
// FIXME: move to libcmd
App UnresolvedApp::resolve(ref<Store> evalStore, ref<Store> store)
{
auto res = unresolved;
std::vector<std::shared_ptr<Installable>> installableContext;
for (auto & ctxElt : unresolved.context)
installableContext.push_back(
std::make_shared<InstallableDerivedPath>(store, ctxElt.toDerivedPath()));
auto builtContext = Installable::build(evalStore, store, Realise::Outputs, installableContext);
res.program = resolveString(*store, unresolved.program, builtContext);
if (!store->isInStore(res.program))
throw Error("app program '%s' is not in the Nix store", res.program);
return res;
}
}
|
