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Factor out machines.conf parsing

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This allows hydra-queue-runner to use it.
This commit is contained in:
Eelco Dolstra 2017-05-02 13:17:37 +02:00
parent 174b68a2a2
commit ebc9f36a81
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GPG key ID: 8170B4726D7198DE
3 changed files with 108 additions and 87 deletions
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95
src/build-remote/build-remote.cc
View file

@ -9,6 +9,7 @@
#include <sys/time.h>
#endif
#include "machines.hh"
#include "shared.hh"
#include "pathlocks.hh"
#include "globals.hh"
@ -22,92 +23,6 @@ using std::cin;
static void handleAlarm(int sig) {
}
class Machine {
const std::set<string> supportedFeatures;
const std::set<string> mandatoryFeatures;
public:
const string storeUri;
const std::vector<string> systemTypes;
const string sshKey;
const unsigned int maxJobs;
const unsigned int speedFactor;
bool enabled = true;
bool allSupported(const std::set<string> & features) const {
return std::all_of(features.begin(), features.end(),
[&](const string & feature) {
return supportedFeatures.count(feature) ||
mandatoryFeatures.count(feature);
});
}
bool mandatoryMet(const std::set<string> & features) const {
return std::all_of(mandatoryFeatures.begin(), mandatoryFeatures.end(),
[&](const string & feature) {
return features.count(feature);
});
}
Machine(decltype(storeUri) storeUri,
decltype(systemTypes) systemTypes,
decltype(sshKey) sshKey,
decltype(maxJobs) maxJobs,
decltype(speedFactor) speedFactor,
decltype(supportedFeatures) supportedFeatures,
decltype(mandatoryFeatures) mandatoryFeatures) :
supportedFeatures(supportedFeatures),
mandatoryFeatures(mandatoryFeatures),
storeUri(
// Backwards compatibility: if the URI is a hostname,
// prepend ssh://.
storeUri.find("://") != std::string::npos || hasPrefix(storeUri, "local") || hasPrefix(storeUri, "remote") || hasPrefix(storeUri, "auto")
? storeUri
: "ssh://" + storeUri),
systemTypes(systemTypes),
sshKey(sshKey),
maxJobs(maxJobs),
speedFactor(std::max(1U, speedFactor))
{}
};
static std::vector<Machine> readConf()
{
auto conf = getEnv("NIX_REMOTE_SYSTEMS", SYSCONFDIR "/nix/machines");
auto machines = std::vector<Machine>{};
auto lines = std::vector<string>{};
try {
lines = tokenizeString<std::vector<string>>(readFile(conf), "\n");
} catch (const SysError & e) {
if (e.errNo != ENOENT)
throw;
}
for (auto line : lines) {
chomp(line);
line.erase(std::find(line.begin(), line.end(), '#'), line.end());
if (line.empty()) {
continue;
}
auto tokens = tokenizeString<std::vector<string>>(line);
auto sz = tokens.size();
if (sz < 1)
throw FormatError("bad machines.conf file ‘%1%’", conf);
machines.emplace_back(tokens[0],
sz >= 2 ? tokenizeString<std::vector<string>>(tokens[1], ",") : std::vector<string>{settings.thisSystem},
sz >= 3 ? tokens[2] : "",
sz >= 4 ? std::stoull(tokens[3]) : 1LL,
sz >= 5 ? std::stoull(tokens[4]) : 1LL,
sz >= 6 ?
tokenizeString<std::set<string>>(tokens[5], ",") :
std::set<string>{},
sz >= 7 ?
tokenizeString<std::set<string>>(tokens[6], ",") :
std::set<string>{});
}
return machines;
}
std::string escapeUri(std::string uri)
{
std::replace(uri.begin(), uri.end(), '/', '_');
@ -147,7 +62,13 @@ int main (int argc, char * * argv)
std::shared_ptr<Store> sshStore;
AutoCloseFD bestSlotLock;
auto machines = readConf();
Machines machines;
try {
parseMachines(readFile(getEnv("NIX_REMOTE_SYSTEMS", SYSCONFDIR "/nix/machines")), machines);
} catch (const SysError & e) {
if (e.errNo != ENOENT)
throw;
}
debug("got %d remote builders", machines.size());
if (machines.empty()) {

65
src/libstore/machines.cc Normal file
View file

@ -0,0 +1,65 @@
#include "machines.hh"
#include "util.hh"
#include "globals.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) :
storeUri(
// Backwards compatibility: if the URI is a hostname,
// prepend ssh://.
storeUri.find("://") != std::string::npos || hasPrefix(storeUri, "local") || hasPrefix(storeUri, "remote") || hasPrefix(storeUri, "auto")
? storeUri
: "ssh://" + storeUri),
systemTypes(systemTypes),
sshKey(sshKey),
maxJobs(maxJobs),
speedFactor(std::max(1U, speedFactor)),
supportedFeatures(supportedFeatures),
mandatoryFeatures(mandatoryFeatures)
{}
bool Machine::allSupported(const std::set<string> & features) const {
return std::all_of(features.begin(), features.end(),
[&](const string & feature) {
return supportedFeatures.count(feature) ||
mandatoryFeatures.count(feature);
});
}
bool Machine::mandatoryMet(const std::set<string> & features) const {
return std::all_of(mandatoryFeatures.begin(), mandatoryFeatures.end(),
[&](const string & feature) {
return features.count(feature);
});
}
void parseMachines(const std::string & s, Machines & machines)
{
for (auto line : tokenizeString<std::vector<string>>(s, "\n")) {
chomp(line);
line.erase(std::find(line.begin(), line.end(), '#'), line.end());
if (line.empty()) continue;
auto tokens = tokenizeString<std::vector<string>>(line);
auto sz = tokens.size();
if (sz < 1)
throw FormatError("bad machine specification ‘%s’", line);
machines.emplace_back(tokens[0],
sz >= 2 ? tokenizeString<std::vector<string>>(tokens[1], ",") : std::vector<string>{settings.thisSystem},
sz >= 3 ? tokens[2] : "",
sz >= 4 ? std::stoull(tokens[3]) : 1LL,
sz >= 5 ? std::stoull(tokens[4]) : 1LL,
sz >= 6 ? tokenizeString<std::set<string>>(tokens[5], ",") : std::set<string>{},
sz >= 7 ? tokenizeString<std::set<string>>(tokens[6], ",") : std::set<string>{});
}
}
}

35
src/libstore/machines.hh Normal file
View file

@ -0,0 +1,35 @@
#pragma once
#include "types.hh"
namespace nix {
struct Machine {
const string storeUri;
const std::vector<string> systemTypes;
const string sshKey;
const unsigned int maxJobs;
const unsigned int speedFactor;
const std::set<string> supportedFeatures;
const std::set<string> mandatoryFeatures;
bool enabled = true;
bool allSupported(const std::set<string> & features) const;
bool mandatoryMet(const std::set<string> & features) const;
Machine(decltype(storeUri) storeUri,
decltype(systemTypes) systemTypes,
decltype(sshKey) sshKey,
decltype(maxJobs) maxJobs,
decltype(speedFactor) speedFactor,
decltype(supportedFeatures) supportedFeatures,
decltype(mandatoryFeatures) mandatoryFeatures);
};
typedef std::vector<Machine> Machines;
void parseMachines(const std::string & s, Machines & machines);
}