#include "config.h" #include "globals.hh" #include "util.hh" #include <map> #include <algorithm> namespace nix { Settings settings; Settings::Settings() { keepFailed = false; keepGoing = false; tryFallback = false; buildVerbosity = lvlError; maxBuildJobs = 1; buildCores = 1; readOnlyMode = false; thisSystem = SYSTEM; maxSilentTime = 0; buildTimeout = 0; useBuildHook = true; printBuildTrace = false; reservedSize = 1024 * 1024; fsyncMetadata = true; useSQLiteWAL = true; syncBeforeRegistering = false; useSubstitutes = true; useChroot = false; dirsInChroot.insert("/dev"); dirsInChroot.insert("/dev/pts"); impersonateLinux26 = false; keepLog = true; compressLog = true; cacheFailure = false; pollInterval = 5; checkRootReachability = false; gcKeepOutputs = false; gcKeepDerivations = true; autoOptimiseStore = true; envKeepDerivations = false; } void Settings::processEnvironment() { nixStore = canonPath(getEnv("NIX_STORE_DIR", getEnv("NIX_STORE", NIX_STORE_DIR))); nixDataDir = canonPath(getEnv("NIX_DATA_DIR", NIX_DATA_DIR)); nixLogDir = canonPath(getEnv("NIX_LOG_DIR", NIX_LOG_DIR)); nixStateDir = canonPath(getEnv("NIX_STATE_DIR", NIX_STATE_DIR)); nixDBPath = getEnv("NIX_DB_DIR", nixStateDir + "/db"); nixConfDir = canonPath(getEnv("NIX_CONF_DIR", NIX_CONF_DIR)); nixLibexecDir = canonPath(getEnv("NIX_LIBEXEC_DIR", NIX_LIBEXEC_DIR)); nixBinDir = canonPath(getEnv("NIX_BIN_DIR", NIX_BIN_DIR)); string subs = getEnv("NIX_SUBSTITUTERS", "default"); if (subs == "default") { substituters.push_back(nixLibexecDir + "/nix/substituters/copy-from-other-stores.pl"); substituters.push_back(nixLibexecDir + "/nix/substituters/download-using-manifests.pl"); substituters.push_back(nixLibexecDir + "/nix/substituters/download-from-binary-cache.pl"); } else substituters = tokenizeString(subs, ":"); } string & at(Strings & ss, unsigned int n) { Strings::iterator i = ss.begin(); advance(i, n); return *i; } void Settings::loadConfFile() { Path settingsFile = (format("%1%/%2%") % nixConfDir % "nix.conf").str(); if (!pathExists(settingsFile)) return; string contents = readFile(settingsFile); unsigned int pos = 0; while (pos < contents.size()) { string line; while (pos < contents.size() && contents[pos] != '\n') line += contents[pos++]; pos++; string::size_type hash = line.find('#'); if (hash != string::npos) line = string(line, 0, hash); Strings tokens = tokenizeString(line); if (tokens.empty()) continue; if (tokens.size() < 2 || at(tokens, 1) != "=") throw Error(format("illegal configuration line `%1%' in `%2%'") % line % settingsFile); string name = at(tokens, 0); Strings::iterator i = tokens.begin(); advance(i, 2); settings[name] = concatStringsSep(" ", Strings(i, tokens.end())); // FIXME: slow }; } void Settings::set(const string & name, const string & value) { settings[name] = value; overrides[name] = value; } void Settings::update() { get(tryFallback, "build-fallback"); get(maxBuildJobs, "build-max-jobs"); get(buildCores, "build-cores"); get(thisSystem, "system"); get(maxSilentTime, "build-max-silent-time"); get(buildTimeout, "build-timeout"); get(reservedSize, "gc-reserved-space"); get(fsyncMetadata, "fsync-metadata"); get(useSQLiteWAL, "use-sqlite-wal"); get(syncBeforeRegistering, "sync-before-registering"); get(useSubstitutes, "build-use-substitutes"); get(buildUsersGroup, "build-users-group"); get(useChroot, "build-use-chroot"); get(dirsInChroot, "build-chroot-dirs"); get(impersonateLinux26, "build-impersonate-linux-26"); get(keepLog, "build-keep-log"); get(compressLog, "build-compress-log"); get(cacheFailure, "build-cache-failure"); get(pollInterval, "build-poll-interval"); get(checkRootReachability, "gc-check-reachability"); get(gcKeepOutputs, "gc-keep-outputs"); get(gcKeepDerivations, "gc-keep-derivations"); get(autoOptimiseStore, "auto-optimise-store"); get(envKeepDerivations, "env-keep-derivations"); } void Settings::get(string & res, const string & name) { SettingsMap::iterator i = settings.find(name); if (i == settings.end()) return; res = i->second; } void Settings::get(bool & res, const string & name) { SettingsMap::iterator i = settings.find(name); if (i == settings.end()) return; if (i->second == "true") res = true; else if (i->second == "false") res = false; else throw Error(format("configuration option `%1%' should be either `true' or `false', not `%2%'") % name % i->second); } void Settings::get(PathSet & res, const string & name) { SettingsMap::iterator i = settings.find(name); if (i == settings.end()) return; res.clear(); Strings ss = tokenizeString(i->second); res.insert(ss.begin(), ss.end()); } template<class N> void Settings::get(N & res, const string & name) { SettingsMap::iterator i = settings.find(name); if (i == settings.end()) return; if (!string2Int(i->second, res)) throw Error(format("configuration setting `%1%' should have an integer value") % name); } string Settings::pack() { string s; foreach (SettingsMap::iterator, i, settings) { if (i->first.find('\n') != string::npos || i->first.find('=') != string::npos || i->second.find('\n') != string::npos) throw Error("illegal option name/value"); s += i->first; s += '='; s += i->second; s += '\n'; } return s; } Settings::SettingsMap Settings::getOverrides() { return overrides; } }