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
|
#include "machines.hh"
#include "util.hh"
#include "globals.hh"
#include "store-api.hh"
#include <algorithm>
namespace nix {
Machine::Machine(decltype(storeUri) storeUri,
decltype(systemTypes) systemTypes,
decltype(sshKey) sshKey,
decltype(maxJobs) maxJobs,
decltype(speedFactor) speedFactor,
decltype(supportedFeatures) supportedFeatures,
decltype(mandatoryFeatures) mandatoryFeatures,
decltype(sshPublicHostKey) sshPublicHostKey) :
storeUri(
// Backwards compatibility: if the URI is schemeless, is not a path,
// and is not one of the special store connection words, prepend
// ssh://.
storeUri.find("://") != std::string::npos
|| storeUri.find("/") != std::string::npos
|| storeUri == "auto"
|| storeUri == "daemon"
|| storeUri == "local"
|| storeUri.starts_with("auto?")
|| storeUri.starts_with("daemon?")
|| storeUri.starts_with("local?")
|| storeUri.starts_with("?")
? storeUri
: "ssh://" + storeUri),
systemTypes(systemTypes),
sshKey(sshKey),
maxJobs(maxJobs),
speedFactor(speedFactor == 0.0f ? 1.0f : std::move(speedFactor)),
supportedFeatures(supportedFeatures),
mandatoryFeatures(mandatoryFeatures),
sshPublicHostKey(sshPublicHostKey)
{
if (speedFactor < 0.0)
throw UsageError("speed factor must be >= 0");
}
bool Machine::systemSupported(const std::string & system) const
{
return system == "builtin" || (systemTypes.count(system) > 0);
}
bool Machine::allSupported(const std::set<std::string> & features) const
{
return std::all_of(features.begin(), features.end(),
[&](const std::string & feature) {
return supportedFeatures.count(feature) ||
mandatoryFeatures.count(feature);
});
}
bool Machine::mandatoryMet(const std::set<std::string> & features) const
{
return std::all_of(mandatoryFeatures.begin(), mandatoryFeatures.end(),
[&](const std::string & feature) {
return features.count(feature);
});
}
ref<Store> Machine::openStore() const
{
Store::Params storeParams;
if (storeUri.starts_with("ssh://")) {
storeParams["max-connections"] = "1";
}
if (storeUri.starts_with("ssh://") || storeUri.starts_with("ssh-ng://")) {
storeParams["log-fd"] = "4";
if (sshKey != "")
storeParams["ssh-key"] = sshKey;
if (sshPublicHostKey != "")
storeParams["base64-ssh-public-host-key"] = sshPublicHostKey;
}
{
auto & fs = storeParams["system-features"];
auto append = [&](auto feats) {
for (auto & f : feats) {
if (fs.size() > 0) fs += ' ';
fs += f;
}
};
append(supportedFeatures);
append(mandatoryFeatures);
}
return nix::openStore(storeUri, storeParams);
}
static std::vector<std::string> expandBuilderLines(const std::string & builders)
{
std::vector<std::string> result;
for (auto line : tokenizeString<std::vector<std::string>>(builders, "\n;")) {
trim(line);
line.erase(std::find(line.begin(), line.end(), '#'), line.end());
if (line.empty()) continue;
if (line[0] == '@') {
const std::string path = trim(std::string(line, 1));
std::string text;
try {
text = readFile(path);
} catch (const SysError & e) {
if (e.errNo != ENOENT)
throw;
debug("cannot find machines file '%s'", path);
}
const auto lines = expandBuilderLines(text);
result.insert(end(result), begin(lines), end(lines));
continue;
}
result.emplace_back(line);
}
return result;
}
static Machine parseBuilderLine(const std::string & line)
{
const auto tokens = tokenizeString<std::vector<std::string>>(line);
auto isSet = [&](size_t fieldIndex) {
return tokens.size() > fieldIndex && tokens[fieldIndex] != "" && tokens[fieldIndex] != "-";
};
auto parseUnsignedIntField = [&](size_t fieldIndex) {
const auto result = string2Int<unsigned int>(tokens[fieldIndex]);
if (!result) {
throw FormatError("bad machine specification: failed to convert column #%lu in a row: '%s' to 'unsigned int'", fieldIndex, line);
}
return result.value();
};
auto parseFloatField = [&](size_t fieldIndex) {
const auto result = string2Int<float>(tokens[fieldIndex]);
if (!result) {
throw FormatError("bad machine specification: failed to convert column #%lu in a row: '%s' to 'float'", fieldIndex, line);
}
return result.value();
};
auto ensureBase64 = [&](size_t fieldIndex) {
const auto & str = tokens[fieldIndex];
try {
base64Decode(str);
} catch (const Error & e) {
throw FormatError("bad machine specification: a column #%lu in a row: '%s' is not valid base64 string: %s", fieldIndex, line, e.what());
}
return str;
};
if (!isSet(0))
throw FormatError("bad machine specification: store URL was not found at the first column of a row: '%s'", line);
return {
tokens[0],
isSet(1) ? tokenizeString<std::set<std::string>>(tokens[1], ",") : std::set<std::string>{settings.thisSystem},
isSet(2) ? tokens[2] : "",
isSet(3) ? parseUnsignedIntField(3) : 1U,
isSet(4) ? parseFloatField(4) : 1.0f,
isSet(5) ? tokenizeString<std::set<std::string>>(tokens[5], ",") : std::set<std::string>{},
isSet(6) ? tokenizeString<std::set<std::string>>(tokens[6], ",") : std::set<std::string>{},
isSet(7) ? ensureBase64(7) : ""
};
}
static Machines parseBuilderLines(const std::vector<std::string> & builders)
{
Machines result;
std::transform(builders.begin(), builders.end(), std::back_inserter(result), parseBuilderLine);
return result;
}
Machines getMachines()
{
const auto builderLines = expandBuilderLines(settings.builders);
return parseBuilderLines(builderLines);
}
}
|
