forked from lix-project/lix
7251d048fa
"build-max-jobs" and the "-j" option can now be set to "auto" to use the number of CPUs in the system. (Unlike build-cores, it doesn't use 0 to imply auto-configuration, because a) magic values are a bad idea in general; b) 0 is a legitimate value used to disable local building.) Fixes #1198.
270 lines
7.6 KiB
C++
270 lines
7.6 KiB
C++
#include "globals.hh"
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#include "util.hh"
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#include "archive.hh"
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#include <algorithm>
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#include <map>
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#include <thread>
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namespace nix {
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/* The default location of the daemon socket, relative to nixStateDir.
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The socket is in a directory to allow you to control access to the
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Nix daemon by setting the mode/ownership of the directory
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appropriately. (This wouldn't work on the socket itself since it
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must be deleted and recreated on startup.) */
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#define DEFAULT_SOCKET_PATH "/daemon-socket/socket"
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Settings settings;
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Settings::Settings()
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{
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nixPrefix = NIX_PREFIX;
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nixStore = canonPath(getEnv("NIX_STORE_DIR", getEnv("NIX_STORE", NIX_STORE_DIR)));
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nixDataDir = canonPath(getEnv("NIX_DATA_DIR", NIX_DATA_DIR));
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nixLogDir = canonPath(getEnv("NIX_LOG_DIR", NIX_LOG_DIR));
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nixStateDir = canonPath(getEnv("NIX_STATE_DIR", NIX_STATE_DIR));
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nixConfDir = canonPath(getEnv("NIX_CONF_DIR", NIX_CONF_DIR));
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nixLibexecDir = canonPath(getEnv("NIX_LIBEXEC_DIR", NIX_LIBEXEC_DIR));
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nixBinDir = canonPath(getEnv("NIX_BIN_DIR", NIX_BIN_DIR));
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nixDaemonSocketFile = canonPath(nixStateDir + DEFAULT_SOCKET_PATH);
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// should be set with the other config options, but depends on nixLibexecDir
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#ifdef __APPLE__
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preBuildHook = nixLibexecDir + "/nix/resolve-system-dependencies";
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#endif
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keepFailed = false;
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keepGoing = false;
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tryFallback = false;
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maxBuildJobs = 1;
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buildCores = std::max(1U, std::thread::hardware_concurrency());
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readOnlyMode = false;
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thisSystem = SYSTEM;
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maxSilentTime = 0;
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buildTimeout = 0;
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useBuildHook = true;
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reservedSize = 8 * 1024 * 1024;
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fsyncMetadata = true;
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useSQLiteWAL = true;
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syncBeforeRegistering = false;
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useSubstitutes = true;
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buildUsersGroup = getuid() == 0 ? "nixbld" : "";
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useSshSubstituter = true;
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impersonateLinux26 = false;
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keepLog = true;
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compressLog = true;
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maxLogSize = 0;
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pollInterval = 5;
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checkRootReachability = false;
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gcKeepOutputs = false;
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gcKeepDerivations = true;
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autoOptimiseStore = false;
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envKeepDerivations = false;
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lockCPU = getEnv("NIX_AFFINITY_HACK", "1") == "1";
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showTrace = false;
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enableImportNative = false;
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netrcFile = fmt("%s/%s", nixConfDir, "netrc");
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}
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void Settings::loadConfFile()
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{
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Path settingsFile = (format("%1%/%2%") % nixConfDir % "nix.conf").str();
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if (!pathExists(settingsFile)) return;
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string contents = readFile(settingsFile);
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unsigned int pos = 0;
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while (pos < contents.size()) {
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string line;
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while (pos < contents.size() && contents[pos] != '\n')
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line += contents[pos++];
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pos++;
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string::size_type hash = line.find('#');
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if (hash != string::npos)
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line = string(line, 0, hash);
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vector<string> tokens = tokenizeString<vector<string> >(line);
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if (tokens.empty()) continue;
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if (tokens.size() < 2 || tokens[1] != "=")
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throw Error(format("illegal configuration line ‘%1%’ in ‘%2%’") % line % settingsFile);
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string name = tokens[0];
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vector<string>::iterator i = tokens.begin();
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advance(i, 2);
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settings[name] = concatStringsSep(" ", Strings(i, tokens.end())); // FIXME: slow
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};
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}
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void Settings::set(const string & name, const string & value)
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{
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settings[name] = value;
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overrides[name] = value;
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}
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string Settings::get(const string & name, const string & def)
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{
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auto i = settings.find(name);
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if (i == settings.end()) return def;
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return i->second;
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}
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Strings Settings::get(const string & name, const Strings & def)
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{
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auto i = settings.find(name);
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if (i == settings.end()) return def;
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return tokenizeString<Strings>(i->second);
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}
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bool Settings::get(const string & name, bool def)
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{
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bool res = def;
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_get(res, name);
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return res;
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}
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int Settings::get(const string & name, int def)
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{
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int res = def;
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_get(res, name);
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return res;
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}
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void Settings::update()
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{
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_get(tryFallback, "build-fallback");
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auto s = get("build-max-jobs", std::string("1"));
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if (s == "auto")
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maxBuildJobs = std::max(1U, std::thread::hardware_concurrency());
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else
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if (!string2Int(s, maxBuildJobs))
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throw Error("configuration setting ‘build-max-jobs’ should be ‘auto’ or an integer");
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_get(buildCores, "build-cores");
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_get(thisSystem, "system");
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_get(maxSilentTime, "build-max-silent-time");
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_get(buildTimeout, "build-timeout");
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_get(reservedSize, "gc-reserved-space");
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_get(fsyncMetadata, "fsync-metadata");
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_get(useSQLiteWAL, "use-sqlite-wal");
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_get(syncBeforeRegistering, "sync-before-registering");
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_get(useSubstitutes, "build-use-substitutes");
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_get(buildUsersGroup, "build-users-group");
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_get(impersonateLinux26, "build-impersonate-linux-26");
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_get(keepLog, "build-keep-log");
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_get(compressLog, "build-compress-log");
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_get(maxLogSize, "build-max-log-size");
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_get(pollInterval, "build-poll-interval");
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_get(checkRootReachability, "gc-check-reachability");
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_get(gcKeepOutputs, "gc-keep-outputs");
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_get(gcKeepDerivations, "gc-keep-derivations");
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_get(autoOptimiseStore, "auto-optimise-store");
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_get(envKeepDerivations, "env-keep-derivations");
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_get(sshSubstituterHosts, "ssh-substituter-hosts");
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_get(useSshSubstituter, "use-ssh-substituter");
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_get(logServers, "log-servers");
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_get(enableImportNative, "allow-unsafe-native-code-during-evaluation");
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_get(useCaseHack, "use-case-hack");
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_get(preBuildHook, "pre-build-hook");
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_get(keepGoing, "keep-going");
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_get(keepFailed, "keep-failed");
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_get(netrcFile, "netrc-file");
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}
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void Settings::_get(string & res, const string & name)
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{
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SettingsMap::iterator i = settings.find(name);
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if (i == settings.end()) return;
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res = i->second;
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}
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void Settings::_get(bool & res, const string & name)
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{
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SettingsMap::iterator i = settings.find(name);
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if (i == settings.end()) return;
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if (i->second == "true") res = true;
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else if (i->second == "false") res = false;
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else throw Error(format("configuration option ‘%1%’ should be either ‘true’ or ‘false’, not ‘%2%’")
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% name % i->second);
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}
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void Settings::_get(StringSet & res, const string & name)
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{
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SettingsMap::iterator i = settings.find(name);
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if (i == settings.end()) return;
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res.clear();
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Strings ss = tokenizeString<Strings>(i->second);
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res.insert(ss.begin(), ss.end());
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}
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void Settings::_get(Strings & res, const string & name)
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{
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SettingsMap::iterator i = settings.find(name);
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if (i == settings.end()) return;
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res = tokenizeString<Strings>(i->second);
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}
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template<class N> void Settings::_get(N & res, const string & name)
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{
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SettingsMap::iterator i = settings.find(name);
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if (i == settings.end()) return;
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if (!string2Int(i->second, res))
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throw Error(format("configuration setting ‘%1%’ should have an integer value") % name);
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}
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string Settings::pack()
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{
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string s;
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for (auto & i : settings) {
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if (i.first.find('\n') != string::npos ||
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i.first.find('=') != string::npos ||
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i.second.find('\n') != string::npos)
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throw Error("illegal option name/value");
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s += i.first; s += '='; s += i.second; s += '\n';
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}
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return s;
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}
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void Settings::unpack(const string & pack) {
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Strings lines = tokenizeString<Strings>(pack, "\n");
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for (auto & i : lines) {
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string::size_type eq = i.find('=');
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if (eq == string::npos)
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throw Error("illegal option name/value");
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set(i.substr(0, eq), i.substr(eq + 1));
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}
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}
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Settings::SettingsMap Settings::getOverrides()
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{
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return overrides;
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}
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const string nixVersion = PACKAGE_VERSION;
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}
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