about summary refs log tree commit diff
path: root/src/libstore/globals.cc
blob: 739199d48ee7f34d45136bacaaec020d23e75731 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
#include "config.h"

#include "globals.hh"
#include "util.hh"

#include <map>
#include <algorithm>
#include <unistd.h>


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;
#ifdef _SC_NPROCESSORS_ONLN
    long res = sysconf(_SC_NPROCESSORS_ONLN);
    if (res > 0) buildCores = res;
#endif
    readOnlyMode = false;
    thisSystem = SYSTEM;
    maxSilentTime = 0;
    buildTimeout = 0;
    useBuildHook = true;
    printBuildTrace = false;
    reservedSize = 1024 * 1024;
    fsyncMetadata = true;
    useSQLiteWAL = true;
    syncBeforeRegistering = false;
    useSubstitutes = true;
    buildUsersGroup = getuid() == 0 ? "nixbld" : "";
    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;


}