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#include "machines.hh"
#include "globals.hh"
#include "store-api.hh"
#include "strings.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 : 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["log-fd"] = "4";
storeParams["max-connections"] = "1";
}
if (storeUri.starts_with("ssh://") || storeUri.starts_with("ssh-ng://")) {
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 = string2Float<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);
}
}
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