Merge branch 'nix' into 'master'.

1 files changed, 240 insertions, 0 deletions

diff --git a/nix/libstore/globals.cc b/nix/libstore/globals.cc
new file mode 100644
index 0000000000..86fa56739c
--- /dev/null
+++ b/nix/libstore/globals.cc
@@ -0,0 +1,240 @@
+#include "config.h"
+
+#include "globals.hh"
+#include "util.hh"
+
+#include <map>
+#include <algorithm>
+
+
+namespace nix {
+
+
+/* The default location of the daemon socket, relative to nixStateDir.
+   The socket is in a directory to allow you to control access to the
+   Nix daemon by setting the mode/ownership of the directory
+   appropriately.  (This wouldn't work on the socket itself since it
+   must be deleted and recreated on startup.) */
+#define DEFAULT_SOCKET_PATH "/daemon-socket/socket"
+
+
+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;
+    useSshSubstituter = false;
+    impersonateLinux26 = false;
+    keepLog = true;
+    compressLog = true;
+    maxLogSize = 0;
+    cacheFailure = false;
+    pollInterval = 5;
+    checkRootReachability = false;
+    gcKeepOutputs = false;
+    gcKeepDerivations = true;
+    autoOptimiseStore = false;
+    envKeepDerivations = false;
+    lockCPU = getEnv("NIX_AFFINITY_HACK", "1") == "1";
+    showTrace = 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));
+    nixDaemonSocketFile = canonPath(nixStateDir + DEFAULT_SOCKET_PATH);
+}
+
+
+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);
+
+        vector<string> tokens = tokenizeString<vector<string> >(line);
+        if (tokens.empty()) continue;
+
+        if (tokens.size() < 2 || tokens[1] != "=")
+            throw Error(format("illegal configuration line `%1%' in `%2%'") % line % settingsFile);
+
+        string name = tokens[0];
+
+        vector<string>::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(maxLogSize, "build-max-log-size");
+    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");
+    get(sshSubstituterHosts, "ssh-substituter-hosts");
+    get(useSshSubstituter, "use-ssh-substituter");
+
+    string subs = getEnv("NIX_SUBSTITUTERS", "default");
+    if (subs == "default") {
+        substituters.clear();
+#if 0
+        if (getEnv("NIX_OTHER_STORES") != "")
+            substituters.push_back(nixLibexecDir + "/nix/substituters/copy-from-other-stores.pl");
+#endif
+        substituters.push_back(nixLibexecDir + "/nix/substituters/download-using-manifests.pl");
+        substituters.push_back(nixLibexecDir + "/nix/substituters/download-from-binary-cache.pl");
+        if (useSshSubstituter)
+            substituters.push_back(nixLibexecDir + "/nix/substituters/download-via-ssh");
+    } else
+        substituters = tokenizeString<Strings>(subs, ":");
+}
+
+
+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(StringSet & res, const string & name)
+{
+    SettingsMap::iterator i = settings.find(name);
+    if (i == settings.end()) return;
+    res.clear();
+    Strings ss = tokenizeString<Strings>(i->second);
+    res.insert(ss.begin(), ss.end());
+}
+
+void Settings::get(Strings & res, const string & name)
+{
+    SettingsMap::iterator i = settings.find(name);
+    if (i == settings.end()) return;
+    res = tokenizeString<Strings>(i->second);
+}
+
+
+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;
+}
+
+
+void Settings::unpack(const string & pack) {
+    Strings lines = tokenizeString<Strings>(pack, "\n");
+    foreach (Strings::iterator, i, lines) {
+        string::size_type eq = i->find('=');
+        if (eq == string::npos)
+            throw Error("illegal option name/value");
+        set(i->substr(0, eq), i->substr(eq + 1));
+    }
+}
+
+
+Settings::SettingsMap Settings::getOverrides()
+{
+    return overrides;
+}
+
+
+const string nixVersion = PACKAGE_VERSION;
+
+
+}