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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
#pragma once
#include "util.hh"
#include "path.hh"
#include "outputs-spec.hh"
#include "derived-path.hh"
#include "eval.hh"
#include "store-api.hh"
#include "flake/flake.hh"
#include "build-result.hh"
#include <optional>
namespace nix {
struct DrvInfo;
struct SourceExprCommand;
namespace eval_cache { class EvalCache; class AttrCursor; }
struct App
{
std::vector<DerivedPath> context;
Path program;
// FIXME: add args, sandbox settings, metadata, ...
};
struct UnresolvedApp
{
App unresolved;
App resolve(ref<Store> evalStore, ref<Store> store);
};
enum class Realise {
/* Build the derivation. Postcondition: the
derivation outputs exist. */
Outputs,
/* Don't build the derivation. Postcondition: the store derivation
exists. */
Derivation,
/* Evaluate in dry-run mode. Postcondition: nothing. */
// FIXME: currently unused, but could be revived if we can
// evaluate derivations in-memory.
Nothing
};
/* How to handle derivations in commands that operate on store paths. */
enum class OperateOn {
/* Operate on the output path. */
Output,
/* Operate on the .drv path. */
Derivation
};
struct ExtraPathInfo
{
std::optional<NixInt> priority;
std::optional<FlakeRef> originalRef;
std::optional<FlakeRef> resolvedRef;
std::optional<std::string> attrPath;
// FIXME: merge with DerivedPath's 'outputs' field?
std::optional<ExtendedOutputsSpec> extendedOutputsSpec;
};
/* A derived path with any additional info that commands might
need from the derivation. */
struct DerivedPathWithInfo
{
DerivedPath path;
ExtraPathInfo info;
};
struct BuiltPathWithResult
{
BuiltPath path;
ExtraPathInfo info;
std::optional<BuildResult> result;
};
typedef std::vector<DerivedPathWithInfo> DerivedPathsWithInfo;
struct Installable
{
virtual ~Installable() { }
virtual std::string what() const = 0;
virtual DerivedPathsWithInfo toDerivedPaths() = 0;
DerivedPathWithInfo toDerivedPath();
UnresolvedApp toApp(EvalState & state);
virtual std::pair<Value *, PosIdx> toValue(EvalState & state)
{
throw Error("argument '%s' cannot be evaluated", what());
}
/* Return a value only if this installable is a store path or a
symlink to it. */
virtual std::optional<StorePath> getStorePath()
{
return {};
}
/* Get a cursor to each value this Installable could refer to. However
if none exists, throw exception instead of returning empty vector. */
virtual std::vector<ref<eval_cache::AttrCursor>>
getCursors(EvalState & state);
/* Get the first and most preferred cursor this Installable could refer
to, or throw an exception if none exists. */
virtual ref<eval_cache::AttrCursor>
getCursor(EvalState & state);
virtual FlakeRef nixpkgsFlakeRef() const
{
return FlakeRef::fromAttrs({{"type","indirect"}, {"id", "nixpkgs"}});
}
static std::vector<BuiltPathWithResult> build(
ref<Store> evalStore,
ref<Store> store,
Realise mode,
const std::vector<std::shared_ptr<Installable>> & installables,
BuildMode bMode = bmNormal);
static std::vector<std::pair<std::shared_ptr<Installable>, BuiltPathWithResult>> build2(
ref<Store> evalStore,
ref<Store> store,
Realise mode,
const std::vector<std::shared_ptr<Installable>> & installables,
BuildMode bMode = bmNormal);
static std::set<StorePath> toStorePaths(
ref<Store> evalStore,
ref<Store> store,
Realise mode,
OperateOn operateOn,
const std::vector<std::shared_ptr<Installable>> & installables);
static StorePath toStorePath(
ref<Store> evalStore,
ref<Store> store,
Realise mode,
OperateOn operateOn,
std::shared_ptr<Installable> installable);
static std::set<StorePath> toDerivations(
ref<Store> store,
const std::vector<std::shared_ptr<Installable>> & installables,
bool useDeriver = false);
static BuiltPaths toBuiltPaths(
ref<Store> evalStore,
ref<Store> store,
Realise mode,
OperateOn operateOn,
const std::vector<std::shared_ptr<Installable>> & installables);
};
typedef std::vector<std::shared_ptr<Installable>> Installables;
struct InstallableValue : Installable
{
ref<EvalState> state;
InstallableValue(ref<EvalState> state) : state(state) {}
};
struct InstallableFlake : InstallableValue
{
FlakeRef flakeRef;
Strings attrPaths;
Strings prefixes;
ExtendedOutputsSpec extendedOutputsSpec;
const flake::LockFlags & lockFlags;
mutable std::shared_ptr<flake::LockedFlake> _lockedFlake;
InstallableFlake(
SourceExprCommand * cmd,
ref<EvalState> state,
FlakeRef && flakeRef,
std::string_view fragment,
ExtendedOutputsSpec extendedOutputsSpec,
Strings attrPaths,
Strings prefixes,
const flake::LockFlags & lockFlags);
std::string what() const override { return flakeRef.to_string() + "#" + *attrPaths.begin(); }
std::vector<std::string> getActualAttrPaths();
Value * getFlakeOutputs(EvalState & state, const flake::LockedFlake & lockedFlake);
DerivedPathsWithInfo toDerivedPaths() override;
std::pair<Value *, PosIdx> toValue(EvalState & state) override;
/* Get a cursor to every attrpath in getActualAttrPaths()
that exists. However if none exists, throw an exception. */
std::vector<ref<eval_cache::AttrCursor>>
getCursors(EvalState & state) override;
std::shared_ptr<flake::LockedFlake> getLockedFlake() const;
FlakeRef nixpkgsFlakeRef() const override;
};
ref<eval_cache::EvalCache> openEvalCache(
EvalState & state,
std::shared_ptr<flake::LockedFlake> lockedFlake);
}
|
