Convert Settings to the new config system

This makes all config options self-documenting.

Unknown or unparseable config settings and --option flags now cause a
warning.
This commit is contained in:
Eelco Dolstra 2017-04-13 20:53:23 +02:00
parent 6bd9576aeb
commit ba9ad29fdb
No known key found for this signature in database
GPG key ID: 8170B4726D7198DE
18 changed files with 348 additions and 546 deletions

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@ -334,16 +334,6 @@ flag, e.g. <literal>--option gc-keep-outputs false</literal>.</para>
</varlistentry>
<varlistentry><term><literal>use-binary-caches</literal></term>
<listitem><para>If set to <literal>true</literal> (the default),
Nix will check the binary caches specified by
<option>binary-caches</option> and related options to obtain
binary substitutes.</para></listitem>
</varlistentry>
<varlistentry><term><literal>binary-caches</literal></term>
<listitem><para>A list of URLs of binary caches, separated by

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@ -20,12 +20,6 @@ $useBindings = 1;
%config = ();
sub readConfig {
if (defined $ENV{'_NIX_OPTIONS'}) {
foreach my $s (split '\n', $ENV{'_NIX_OPTIONS'}) {
my ($n, $v) = split '=', $s, 2;
$config{$n} = $v;
}
} else {
my $config = "$confDir/nix.conf";
return unless -f $config;
@ -35,7 +29,6 @@ sub readConfig {
$config{$1} = $2;
}
close CONFIG;
}
}
return 1;

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@ -22,7 +22,11 @@ MixCommonArgs::MixCommonArgs(const string & programName)
[](Strings ss) {
auto name = ss.front(); ss.pop_front();
auto value = ss.front();
try {
settings.set(name, value);
} catch (UsageError & e) {
warn(e.what());
}
});
}

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@ -138,9 +138,6 @@ void initNix()
struct timeval tv;
gettimeofday(&tv, 0);
srandom(tv.tv_usec);
if (char *pack = getenv("_NIX_OPTIONS"))
settings.unpack(pack);
}
@ -156,10 +153,10 @@ struct LegacyArgs : public MixCommonArgs
&settings.verboseBuild, false);
mkFlag('K', "keep-failed", "keep temporary directories of failed builds",
&settings.keepFailed);
&(bool&) settings.keepFailed);
mkFlag('k', "keep-going", "keep going after a build fails",
&settings.keepGoing);
&(bool&) settings.keepGoing);
mkFlag(0, "fallback", "build from source if substitution fails", []() {
settings.set("build-fallback", "true");
@ -184,7 +181,7 @@ struct LegacyArgs : public MixCommonArgs
&settings.readOnlyMode);
mkFlag(0, "no-build-hook", "disable use of the build hook mechanism",
&settings.useBuildHook, false);
&(bool&) settings.useBuildHook, false);
mkFlag(0, "show-trace", "show Nix expression stack trace in evaluation errors",
&settings.showTrace);
@ -218,7 +215,6 @@ void parseCmdLine(int argc, char * * argv,
std::function<bool(Strings::iterator & arg, const Strings::iterator & end)> parseArg)
{
LegacyArgs(baseNameOf(argv[0]), parseArg).parseCmdline(argvToStrings(argc, argv));
settings.update();
}

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@ -462,7 +462,7 @@ UserLock::UserLock()
assert(settings.buildUsersGroup != "");
/* Get the members of the build-users-group. */
struct group * gr = getgrnam(settings.buildUsersGroup.c_str());
struct group * gr = getgrnam(settings.buildUsersGroup.get().c_str());
if (!gr)
throw Error(format("the group %1% specified in build-users-group does not exist")
% settings.buildUsersGroup);
@ -1690,10 +1690,7 @@ void DerivationGoal::startBuilder()
/* Are we doing a chroot build? */
{
string x = settings.useSandbox;
if (x != "true" && x != "false" && x != "relaxed")
throw Error("option build-use-sandbox must be set to one of true, false or relaxed");
if (x == "true") {
if (settings.sandboxMode == smEnabled) {
if (get(drv->env, "__noChroot") == "1")
throw Error(format("derivation %1% has __noChroot set, "
"but that's not allowed when build-use-sandbox is true") % drvPath);
@ -1704,9 +1701,9 @@ void DerivationGoal::startBuilder()
#endif
useChroot = true;
}
else if (x == "false")
else if (settings.sandboxMode == smDisabled)
useChroot = false;
else if (x == "relaxed")
else if (settings.sandboxMode == smRelaxed)
useChroot = !fixedOutput && get(drv->env, "__noChroot") != "1";
}

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@ -105,12 +105,12 @@ PublicKeys getDefaultPublicKeys()
// FIXME: filter duplicates
for (auto s : settings.binaryCachePublicKeys) {
for (auto s : settings.binaryCachePublicKeys.get()) {
PublicKey key(s);
publicKeys.emplace(key.name, key);
}
for (auto secretKeyFile : settings.secretKeyFiles) {
for (auto secretKeyFile : settings.secretKeyFiles.get()) {
try {
SecretKey secretKey(readFile(secretKeyFile));
publicKeys.emplace(secretKey.name, secretKey.toPublicKey());

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@ -251,7 +251,7 @@ struct CurlDownloader : public Downloader
/* If no file exist in the specified path, curl continues to work
anyway as if netrc support was disabled. */
curl_easy_setopt(req, CURLOPT_NETRC_FILE, settings.netrcFile.c_str());
curl_easy_setopt(req, CURLOPT_NETRC_FILE, settings.netrcFile.get().c_str());
curl_easy_setopt(req, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
result.data = std::make_shared<std::string>();

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@ -1,6 +1,7 @@
#include "globals.hh"
#include "util.hh"
#include "archive.hh"
#include "args.hh"
#include <algorithm>
#include <map>
@ -26,329 +27,89 @@ namespace nix {
Settings settings;
Settings::Settings()
: Config({})
, nixPrefix(NIX_PREFIX)
, 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)))
, 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))
{
deprecatedOptions = StringSet({
"build-use-chroot", "build-chroot-dirs", "build-extra-chroot-dirs",
"this-option-never-existed-but-who-will-know"
});
nixPrefix = NIX_PREFIX;
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));
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);
// should be set with the other config options, but depends on nixLibexecDir
#ifdef __APPLE__
preBuildHook = nixLibexecDir + "/nix/resolve-system-dependencies";
#endif
keepFailed = false;
keepGoing = false;
tryFallback = false;
maxBuildJobs = 1;
buildCores = std::max(1U, std::thread::hardware_concurrency());
readOnlyMode = false;
thisSystem = SYSTEM;
maxSilentTime = 0;
buildTimeout = 0;
useBuildHook = true;
reservedSize = 8 * 1024 * 1024;
fsyncMetadata = true;
useSQLiteWAL = true;
syncBeforeRegistering = false;
useSubstitutes = true;
buildUsersGroup = getuid() == 0 ? "nixbld" : "";
useSshSubstituter = true;
impersonateLinux26 = false;
keepLog = true;
compressLog = true;
maxLogSize = 0;
pollInterval = 5;
checkRootReachability = false;
gcKeepOutputs = false;
gcKeepDerivations = true;
autoOptimiseStore = false;
envKeepDerivations = false;
lockCPU = getEnv("NIX_AFFINITY_HACK", "1") == "1";
showTrace = false;
enableNativeCode = false;
netrcFile = fmt("%s/%s", nixConfDir, "netrc");
caFile = getEnv("NIX_SSL_CERT_FILE", getEnv("SSL_CERT_FILE", "/etc/ssl/certs/ca-certificates.crt"));
enableImportFromDerivation = true;
useSandbox = "false"; // TODO: make into an enum
#if __linux__
sandboxPaths = tokenizeString<StringSet>("/bin/sh=" BASH_PATH);
#endif
restrictEval = false;
buildRepeat = 0;
allowedImpureHostPrefixes = tokenizeString<StringSet>(DEFAULT_ALLOWED_IMPURE_PREFIXES);
sandboxShmSize = "50%";
darwinLogSandboxViolations = false;
runDiffHook = false;
diffHook = "";
enforceDeterminism = true;
binaryCachePublicKeys = Strings{"cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="};
secretKeyFiles = Strings();
binaryCachesParallelConnections = 25;
enableHttp2 = true;
tarballTtl = 60 * 60;
signedBinaryCaches = "";
substituters = Strings();
binaryCaches = nixStore == "/nix/store" ? Strings{"https://cache.nixos.org/"} : Strings();
extraBinaryCaches = Strings();
trustedUsers = Strings({"root"});
allowedUsers = Strings({"*"});
printMissing = true;
}
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
};
applyConfigFile(nixConfDir + "/nix.conf");
}
void Settings::set(const string & name, const string & value)
{
settings[name] = value;
overrides[name] = value;
Config::set(name, value);
}
void Settings::update()
{
_get(tryFallback, "build-fallback");
std::string s = "1";
_get(s, "build-max-jobs");
if (s == "auto")
maxBuildJobs = std::max(1U, std::thread::hardware_concurrency());
else
if (!string2Int(s, maxBuildJobs))
throw Error("configuration setting build-max-jobs should be auto or an integer");
_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(impersonateLinux26, "build-impersonate-linux-26");
_get(keepLog, "build-keep-log");
_get(compressLog, "build-compress-log");
_get(maxLogSize, "build-max-log-size");
_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");
_get(enableNativeCode, "allow-unsafe-native-code-during-evaluation");
_get(useCaseHack, "use-case-hack");
_get(preBuildHook, "pre-build-hook");
_get(keepGoing, "keep-going");
_get(keepFailed, "keep-failed");
_get(netrcFile, "netrc-file");
_get(enableImportFromDerivation, "allow-import-from-derivation");
_get(useSandbox, "build-use-sandbox", "build-use-chroot");
_get(sandboxPaths, "build-sandbox-paths", "build-chroot-dirs");
_get(extraSandboxPaths, "build-extra-sandbox-paths", "build-extra-chroot-dirs");
_get(restrictEval, "restrict-eval");
_get(buildRepeat, "build-repeat");
_get(allowedImpureHostPrefixes, "allowed-impure-host-deps");
_get(sandboxShmSize, "sandbox-dev-shm-size");
_get(darwinLogSandboxViolations, "darwin-log-sandbox-violations");
_get(runDiffHook, "run-diff-hook");
_get(diffHook, "diff-hook");
_get(enforceDeterminism, "enforce-determinism");
_get(binaryCachePublicKeys, "binary-cache-public-keys");
_get(secretKeyFiles, "secret-key-files");
_get(binaryCachesParallelConnections, "binary-caches-parallel-connections");
_get(enableHttp2, "enable-http2");
_get(tarballTtl, "tarball-ttl");
_get(signedBinaryCaches, "signed-binary-caches");
_get(substituters, "substituters");
_get(binaryCaches, "binary-caches");
_get(extraBinaryCaches, "extra-binary-caches");
_get(trustedUsers, "trusted-users");
_get(allowedUsers, "allowed-users");
_get(printMissing, "print-missing");
/* Clear out any deprecated options that might be left, so users know we recognize the option
but aren't processing it anymore */
for (auto &i : deprecatedOptions) {
if (settings.find(i) != settings.end()) {
printError(format("warning: deprecated option '%1%' is no longer supported and will be ignored") % i);
settings.erase(i);
}
}
if (settings.size() != 0) {
string bad;
for (auto &i : settings)
bad += "'" + i.first + "', ";
bad.pop_back();
bad.pop_back();
throw Error(format("unrecognized options: %s") % bad);
}
}
void Settings::checkDeprecated(const string & name)
{
if (deprecatedOptions.find(name) != deprecatedOptions.end())
printError(format("warning: deprecated option '%1%' will soon be unsupported") % name);
}
void Settings::_get(string & res, const string & name)
{
SettingsMap::iterator i = settings.find(name);
if (i == settings.end()) return;
checkDeprecated(i->first);
settings.erase(i);
res = i->second;
}
void Settings::_get(string & res, const string & name1, const string & name2)
{
SettingsMap::iterator i = settings.find(name1);
if (i == settings.end()) i = settings.find(name2);
if (i == settings.end()) return;
checkDeprecated(i->first);
settings.erase(i);
res = i->second;
}
void Settings::_get(bool & res, const string & name)
{
SettingsMap::iterator i = settings.find(name);
if (i == settings.end()) return;
checkDeprecated(i->first);
settings.erase(i);
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;
checkDeprecated(i->first);
settings.erase(i);
res.clear();
Strings ss = tokenizeString<Strings>(i->second);
res.insert(ss.begin(), ss.end());
}
void Settings::_get(StringSet & res, const string & name1, const string & name2)
{
SettingsMap::iterator i = settings.find(name1);
if (i == settings.end()) i = settings.find(name2);
if (i == settings.end()) return;
checkDeprecated(i->first);
settings.erase(i);
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;
checkDeprecated(i->first);
settings.erase(i);
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;
checkDeprecated(i->first);
settings.erase(i);
if (!string2Int(i->second, res))
throw Error(format("configuration setting %1% should have an integer value") % name);
}
string Settings::pack()
{
string s;
for (auto & 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");
for (auto & 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()
StringMap Settings::getOverrides()
{
return overrides;
}
unsigned int Settings::getDefaultCores()
{
return std::max(1U, std::thread::hardware_concurrency());
}
const string nixVersion = PACKAGE_VERSION;
template<> void Setting<SandboxMode>::set(const std::string & str)
{
if (str == "true") value = smEnabled;
else if (str == "relaxed") value = smRelaxed;
else if (str == "false") value = smDisabled;
else throw UsageError("option '%s' has invalid value '%s'", name, str);
}
template<> std::string Setting<SandboxMode>::to_string()
{
if (value == smEnabled) return "true";
else if (value == smRelaxed) return "relaxed";
else if (value == smDisabled) return "false";
else abort();
}
template<> void Setting<unsigned int, Settings::MaxBuildJobsTag>::set(const std::string & str)
{
if (str == "auto") value = std::max(1U, std::thread::hardware_concurrency());
else if (!string2Int(str, value))
throw UsageError("configuration setting %s should be auto or an integer", name);
}
template<> std::string Setting<unsigned int, Settings::MaxBuildJobsTag>::to_string()
{
return std::to_string(value);
}
template<> void Setting<bool, Settings::CaseHackTag>::set(const std::string & str)
{
value = parseBool(str);
nix::useCaseHack = true;
}
template<> std::string Setting<bool, Settings::CaseHackTag>::to_string()
{
return printBool(value);
}
}

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@ -1,7 +1,7 @@
#pragma once
#include "types.hh"
#include "logging.hh"
#include "config.hh"
#include <map>
#include <sys/types.h>
@ -9,10 +9,17 @@
namespace nix {
typedef enum { smEnabled, smRelaxed, smDisabled } SandboxMode;
struct Settings {
extern bool useCaseHack; // FIXME
typedef std::map<string, string> SettingsMap;
class Settings : public Config {
StringMap overrides;
unsigned int getDefaultCores();
public:
Settings();
@ -20,25 +27,15 @@ struct Settings {
void set(const string & name, const string & value);
void update();
StringMap getOverrides();
string pack();
void unpack(const string & pack);
SettingsMap getOverrides();
/* TODO: the comments below should be strings and exposed via a nice command-line UI or similar.
We should probably replace it with some sort of magic template or macro to minimize the amount
of duplication and pain here. */
Path nixPrefix;
/* The directory where we store sources and derived files. */
Path nixStore;
Path nixDataDir; /* !!! fix */
Path nixPrefix;
/* The directory where we log various operations. */
Path nixLogDir;
@ -57,17 +54,14 @@ struct Settings {
/* File name of the socket the daemon listens to. */
Path nixDaemonSocketFile;
/* Whether to keep temporary directories of failed builds. */
bool keepFailed;
Setting<bool> keepFailed{this, false, "keep-failed",
"Whether to keep temporary directories of failed builds."};
/* Whether to keep building subgoals when a sibling (another
subgoal of the same goal) fails. */
bool keepGoing;
Setting<bool> keepGoing{this, false, "keep-going",
"Whether to keep building derivations when another build fails."};
/* Whether, if we cannot realise the known closure corresponding
to a derivation, we should try to normalise the derivation
instead. */
bool tryFallback;
Setting<bool> tryFallback{this, tryFallback, "build-fallback",
"Whether to fall back to building when substitution fails."};
/* Whether to show build log output in real time. */
bool verboseBuild = true;
@ -76,206 +70,206 @@ struct Settings {
the log to show if a build fails. */
size_t logLines = 10;
/* Maximum number of parallel build jobs. 0 means unlimited. */
unsigned int maxBuildJobs;
struct MaxBuildJobsTag { };
Setting<unsigned int, MaxBuildJobsTag> maxBuildJobs{this, 1, "build-max-jobs",
"Maximum number of parallel build jobs. \"auto\" means use number of cores."};
/* Number of CPU cores to utilize in parallel within a build,
i.e. by passing this number to Make via '-j'. 0 means that the
number of actual CPU cores on the local host ought to be
auto-detected. */
unsigned int buildCores;
Setting<unsigned int> buildCores{this, getDefaultCores(), "build-cores",
"Number of CPU cores to utilize in parallel within a build, "
"i.e. by passing this number to Make via '-j'. 0 means that the "
"number of actual CPU cores on the local host ought to be "
"auto-detected."};
/* Read-only mode. Don't copy stuff to the store, don't change
the database. */
bool readOnlyMode;
bool readOnlyMode = false;
/* The canonical system name, as returned by config.guess. */
string thisSystem;
Setting<std::string> thisSystem{this, SYSTEM, "system",
"The canonical Nix system name."};
/* The maximum time in seconds that a builer can go without
producing any output on stdout/stderr before it is killed. 0
means infinity. */
time_t maxSilentTime;
Setting<time_t> maxSilentTime{this, 0, "build-max-silent-time",
"The maximum time in seconds that a builer can go without "
"producing any output on stdout/stderr before it is killed. "
"0 means infinity."};
/* The maximum duration in seconds that a builder can run. 0
means infinity. */
time_t buildTimeout;
Setting<time_t> buildTimeout{this, 0, "build-timeout",
"The maximum duration in seconds that a builder can run. "
"0 means infinity."};
/* Whether to use build hooks (for distributed builds). Sometimes
users want to disable this from the command-line. */
bool useBuildHook;
Setting<bool> useBuildHook{this, true, "remote-builds",
"Whether to use build hooks (for distributed builds)."};
/* Amount of reserved space for the garbage collector
(/nix/var/nix/db/reserved). */
off_t reservedSize;
Setting<off_t> reservedSize{this, 8 * 1024 * 1024, "gc-reserved-space",
"Amount of reserved disk space for the garbage collector."};
/* Whether SQLite should use fsync. */
bool fsyncMetadata;
Setting<bool> fsyncMetadata{this, true, "fsync-metadata",
"Whether SQLite should use fsync()."};
/* Whether SQLite should use WAL mode. */
bool useSQLiteWAL;
Setting<bool> useSQLiteWAL{this, true, "use-sqlite-wal",
"Whether SQLite should use WAL mode."};
/* Whether to call sync() before registering a path as valid. */
bool syncBeforeRegistering;
Setting<bool> syncBeforeRegistering{this, false, "sync-before-registering",
"Whether to call sync() before registering a path as valid."};
/* Whether to use substitutes. */
bool useSubstitutes;
Setting<bool> useSubstitutes{this, true, "build-use-substitutes",
"Whether to use substitutes."};
/* The Unix group that contains the build users. */
string buildUsersGroup;
Setting<std::string> buildUsersGroup{this, "", "build-users-group",
"The Unix group that contains the build users."};
/* Set of ssh connection strings for the ssh substituter */
Strings sshSubstituterHosts;
Setting<bool> impersonateLinux26{this, false, "build-impersonate-linux-26",
"Whether to impersonate a Linux 2.6 machine on newer kernels."};
/* Whether to use the ssh substituter at all */
bool useSshSubstituter;
Setting<bool> keepLog{this, true, "build-keep-log",
"Whether to store build logs."};
/* Whether to impersonate a Linux 2.6 machine on newer kernels. */
bool impersonateLinux26;
Setting<bool> compressLog{this, true, "build-compress-log",
"Whether to compress logs."};
/* Whether to store build logs. */
bool keepLog;
/* Whether to compress logs. */
bool compressLog;
/* Maximum number of bytes a builder can write to stdout/stderr
before being killed (0 means no limit). */
unsigned long maxLogSize;
Setting<unsigned long> maxLogSize{this, 0, "build-max-log-size",
"Maximum number of bytes a builder can write to stdout/stderr "
"before being killed (0 means no limit)."};
/* When build-repeat > 0 and verboseBuild == true, whether to
print repeated builds (i.e. builds other than the first one) to
stderr. Hack to prevent Hydra logs from being polluted. */
bool printRepeatedBuilds = true;
/* How often (in seconds) to poll for locks. */
unsigned int pollInterval;
Setting<unsigned int> pollInterval{this, 5, "build-poll-interval",
"How often (in seconds) to poll for locks."};
/* Whether to check if new GC roots can in fact be found by the
garbage collector. */
bool checkRootReachability;
Setting<bool> checkRootReachability{this, false, "gc-check-reachability",
"Whether to check if new GC roots can in fact be found by the "
"garbage collector."};
/* Whether the garbage collector should keep outputs of live
derivations. */
bool gcKeepOutputs;
Setting<bool> gcKeepOutputs{this, false, "gc-keep-outputs",
"Whether the garbage collector should keep outputs of live derivations."};
/* Whether the garbage collector should keep derivers of live
paths. */
bool gcKeepDerivations;
Setting<bool> gcKeepDerivations{this, true, "gc-keep-derivations",
"Whether the garbage collector should keep derivers of live paths."};
/* Whether to automatically replace files with identical contents
with hard links. */
bool autoOptimiseStore;
Setting<bool> autoOptimiseStore{this, false, "auto-optimise-store",
"Whether to automatically replace files with identical contents with hard links."};
/* Whether to add derivations as a dependency of user environments
(to prevent them from being GCed). */
bool envKeepDerivations;
Setting<bool> envKeepDerivations{this, false, "env-keep-derivations",
"Whether to add derivations as a dependency of user environments "
"(to prevent them from being GCed)."};
/* Whether to lock the Nix client and worker to the same CPU. */
bool lockCPU;
/* Whether to show a stack trace if Nix evaluation fails. */
bool showTrace;
bool showTrace = false;
/* Whether native-code enabling primops should be enabled */
bool enableNativeCode;
Setting<bool> enableNativeCode{this, false, "allow-unsafe-native-code-during-evaluation",
"Whether builtin functions that allow executing native code should be enabled."};
/* Whether to enable sandboxed builds (string until we get an enum for true/false/relaxed) */
string useSandbox;
Setting<SandboxMode> sandboxMode{this, smDisabled, "build-use-sandbox",
"Whether to enable sandboxed builds. Can be \"true\", \"false\" or \"relaxed\".",
{"build-use-chroot"}};
/* The basic set of paths to expose in a sandbox */
PathSet sandboxPaths;
Setting<PathSet> sandboxPaths{this, {}, "build-sandbox-paths",
"The paths to make available inside the build sandbox.",
{"build-chroot-dirs"}};
/* Any extra sandbox paths to expose */
PathSet extraSandboxPaths;
Setting<PathSet> extraSandboxPaths{this, {}, "build-extra-sandbox-paths",
"Additional paths to make available inside the build sandbox.",
{"build-extra-chroot-dirs"}};
/* Whether to allow certain questionable operations (like fetching) during evaluation */
bool restrictEval;
Setting<bool> restrictEval{this, false, "restrict-eval",
"Whether to restrict file system access to paths in $NIX_PATH, "
"and to disallow fetching files from the network."};
/* The number of times to repeat a build to check for determinism */
int buildRepeat;
Setting<size_t> buildRepeat{this, 0, "build-repeat",
"The number of times to repeat a build in order to verify determinism."};
/* Which prefixes to allow derivations to ask for access to (primarily for Darwin) */
PathSet allowedImpureHostPrefixes;
#if __linux__
Setting<std::string> sandboxShmSize{this, "50%", "sandbox-dev-shm-size",
"The size of /dev/shm in the build sandbox."};
#endif
/* The size of /dev/shm in the build sandbox (for Linux) */
string sandboxShmSize;
Setting<PathSet> allowedImpureHostPrefixes{this, {}, "allowed-impure-host-deps",
"Which prefixes to allow derivations to ask for access to (primarily for Darwin)."};
/* Whether to log Darwin sandbox access violations to the system log */
bool darwinLogSandboxViolations;
#if __APPLE__
Setting<bool> darwinLogSandboxViolations{this, false, "darwin-log-sandbox-violations",
"Whether to log Darwin sandbox access violations to the system log."};
#endif
/* ??? */
bool runDiffHook;
Setting<bool> runDiffHook{this, false, "run-diff-hook",
"Whether to run the program specified by the diff-hook setting "
"repeated builds produce a different result. Typically used to "
"plug in diffoscope."};
/* ??? */
string diffHook;
PathSetting diffHook{this, true, "", "diff-hook",
"A program that prints out the differences between the two paths "
"specified on its command line."};
/* Whether to fail if repeated builds produce different output */
bool enforceDeterminism;
Setting<bool> enforceDeterminism{this, true, "enforce-determinism",
"Whether to fail if repeated builds produce different output."};
/* The known public keys for a binary cache */
Strings binaryCachePublicKeys;
Setting<Strings> binaryCachePublicKeys{this,
{"cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="},
"binary-cache-public-keys",
"Trusted public keys for secure substitution."};
/* Secret keys to use for build output signing */
Strings secretKeyFiles;
Setting<Strings> secretKeyFiles{this, {}, "secret-key-files",
"Secret keys with which to sign local builds."};
/* Number of parallel connections to hit a binary cache with when finding out if it contains hashes */
int binaryCachesParallelConnections;
Setting<size_t> binaryCachesParallelConnections{this, 25, "binary-caches-parallel-connections",
"Number of parallel connections to binary caches."};
/* Whether to enable HTTP2 */
bool enableHttp2;
Setting<bool> enableHttp2{this, true, "enable-http2",
"Whether to enable HTTP/2 support."};
/* How soon to expire tarballs like builtins.fetchTarball and (ugh, bad name) builtins.fetchurl */
int tarballTtl;
Setting<unsigned int> tarballTtl{this, 60 * 60, "tarball-ttl",
"How soon to expire files fetched by builtins.fetchTarball and builtins.fetchurl."};
/* ??? */
string signedBinaryCaches;
Setting<std::string> signedBinaryCaches{this, "*", "signed-binary-caches",
"Obsolete."};
/* ??? */
Strings substituters;
Setting<Strings> substituters{this,
nixStore == "/nix/store" ? Strings{"https://cache.nixos.org/"} : Strings(),
"substituters",
"The URIs of substituters (such as https://cache.nixos.org/).",
{"binary-caches"}};
/* ??? */
Strings binaryCaches;
// FIXME: provide a way to add to option values.
Setting<Strings> extraSubstituters{this, {}, "extra-substituters",
"Additional URIs of substituters.",
{"extra-binary-caches"}};
/* ??? */
Strings extraBinaryCaches;
/* Who we trust to ask the daemon to do unsafe things */
Strings trustedUsers;
Setting<Strings> trustedUsers{this, {"root"}, "trusted-users",
"Which users or groups are trusted to ask the daemon to do unsafe things."};
/* ?Who we trust to use the daemon in safe ways */
Strings allowedUsers;
Setting<Strings> allowedUsers{this, {"*"}, "allowed-users",
"Which users or groups are allowed to connect to the daemon."};
/* ??? */
bool printMissing;
Setting<bool> printMissing{this, true, "print-missing",
"Whether to print what paths need to be built or downloaded."};
/* The hook to run just before a build to set derivation-specific
build settings */
Path preBuildHook;
Setting<std::string> preBuildHook{this,
#if __APPLE__
nixLibexecDir + "/nix/resolve-system-dependencies",
#else
"",
#endif
"pre-build-hook",
"A program to run just before a build to set derivation-specific build settings."};
/* Path to the netrc file used to obtain usernames/passwords for
downloads. */
Path netrcFile;
Setting<std::string> netrcFile{this, fmt("%s/%s", nixConfDir, "netrc"), "netrc-file",
"Path to the netrc file used to obtain usernames/passwords for downloads."};
/* Path to the SSL CA file used */
Path caFile;
/* Whether we allow import-from-derivation */
bool enableImportFromDerivation;
Setting<bool> enableImportFromDerivation{this, true, "allow-import-from-derivation",
"Whether the evaluator allows importing the result of a derivation."};
private:
StringSet deprecatedOptions;
SettingsMap settings, overrides;
void checkDeprecated(const string & name);
void _get(string & res, const string & name);
void _get(string & res, const string & name1, const string & name2);
void _get(bool & res, const string & name);
void _get(StringSet & res, const string & name);
void _get(StringSet & res, const string & name1, const string & name2);
void _get(Strings & res, const string & name);
template<class N> void _get(N & res, const string & name);
struct CaseHackTag { };
Setting<bool, CaseHackTag> useCaseHack{this, nix::useCaseHack, "use-case-hack",
"Whether to enable a Darwin-specific hack for dealing with file name collisions."};
};

View file

@ -75,7 +75,7 @@ LocalStore::LocalStore(const Params & params)
mode_t perm = 01775;
struct group * gr = getgrnam(settings.buildUsersGroup.c_str());
struct group * gr = getgrnam(settings.buildUsersGroup.get().c_str());
if (!gr)
printError(format("warning: the group %1% specified in build-users-group does not exist")
% settings.buildUsersGroup);
@ -1335,7 +1335,7 @@ void LocalStore::signPathInfo(ValidPathInfo & info)
auto secretKeyFiles = settings.secretKeyFiles;
for (auto & secretKeyFile : secretKeyFiles) {
for (auto & secretKeyFile : secretKeyFiles.get()) {
SecretKey secretKey(readFile(secretKeyFile));
info.sign(secretKey);
}

View file

@ -166,9 +166,7 @@ void RemoteStore::setOptions(Connection & conn)
<< settings.useSubstitutes;
if (GET_PROTOCOL_MINOR(conn.daemonVersion) >= 12) {
Settings::SettingsMap overrides = settings.getOverrides();
if (overrides["ssh-auth-sock"] == "")
overrides["ssh-auth-sock"] = getEnv("SSH_AUTH_SOCK");
StringMap overrides = settings.getOverrides();
conn.to << overrides.size();
for (auto & i : overrides)
conn.to << i.first << i.second;

View file

@ -719,7 +719,7 @@ ref<Store> openStore(const std::string & uri, const Store::Params & params)
for (auto fun : *RegisterStoreImplementation::implementations) {
auto store = fun(uri, params);
if (store) {
store->warnUnused();
store->warnUnknownSettings();
return ref<Store>(store);
}
}
@ -782,13 +782,10 @@ std::list<ref<Store>> getDefaultSubstituters()
state->stores.push_back(openStore(uri));
};
for (auto uri : settings.substituters)
for (auto uri : settings.substituters.get())
addStore(uri);
for (auto uri : settings.binaryCaches)
addStore(uri);
for (auto uri : settings.extraBinaryCaches)
for (auto uri : settings.extraSubstituters.get())
addStore(uri);
state->done = true;

View file

@ -11,7 +11,7 @@ void Config::set(const std::string & name, const std::string & value)
i->second.setting->set(value);
}
void Config::add(AbstractSetting * setting)
void Config::addSetting(AbstractSetting * setting)
{
_settings.emplace(setting->name, Config::SettingData{false, setting});
for (auto & alias : setting->aliases)
@ -41,21 +41,59 @@ void Config::add(AbstractSetting * setting)
}
}
void Config::warnUnused()
void Config::warnUnknownSettings()
{
for (auto & i : initials)
warn("unknown setting '%s'", i.first);
}
std::string Config::dump()
StringMap Config::getSettings()
{
std::string res;
StringMap res;
for (auto & opt : _settings)
if (!opt.second.isAlias)
res += opt.first + " = " + opt.second.setting->to_string() + "\n";
res.emplace(opt.first, opt.second.setting->to_string());
return res;
}
void Config::applyConfigFile(const Path & path, bool fatal)
{
try {
string contents = readFile(path);
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 UsageError("illegal configuration line %1% in %2%", line, path);
string name = tokens[0];
vector<string>::iterator i = tokens.begin();
advance(i, 2);
try {
set(name, concatStringsSep(" ", Strings(i, tokens.end()))); // FIXME: slow
} catch (UsageError & e) {
if (fatal) throw;
warn("in configuration file '%s': %s", path, e.what());
}
};
} catch (SysError &) { }
}
AbstractSetting::AbstractSetting(
const std::string & name,
const std::string & description,
@ -74,41 +112,65 @@ template<> std::string Setting<std::string>::to_string()
return value;
}
template<typename T>
void Setting<T>::set(const std::string & str)
template<typename T, typename Tag>
void Setting<T, Tag>::set(const std::string & str)
{
static_assert(std::is_integral<T>::value, "Integer required.");
try {
auto i = std::stoll(str);
if (i < std::numeric_limits<T>::min() ||
i > std::numeric_limits<T>::max())
throw UsageError("setting '%s' has out-of-range value %d", name, i);
value = i;
} catch (std::logic_error&) {
if (!string2Int(str, value))
throw UsageError("setting '%s' has invalid value '%s'", name, str);
}
}
template<typename T>
std::string Setting<T>::to_string()
template<typename T, typename Tag>
std::string Setting<T, Tag>::to_string()
{
static_assert(std::is_integral<T>::value, "Integer required.");
return std::to_string(value);
}
template<> void Setting<bool>::set(const std::string & str)
bool AbstractSetting::parseBool(const std::string & str)
{
if (str == "true" || str == "yes" || str == "1")
value = true;
return true;
else if (str == "false" || str == "no" || str == "0")
value = false;
return false;
else
throw UsageError("Boolean setting '%s' has invalid value '%s'", name, str);
}
template<> void Setting<bool>::set(const std::string & str)
{
value = parseBool(str);
}
std::string AbstractSetting::printBool(bool b)
{
return b ? "true" : "false";
}
template<> std::string Setting<bool>::to_string()
{
return value ? "true" : "false";
return printBool(value);
}
template<> void Setting<Strings>::set(const std::string & str)
{
value = tokenizeString<Strings>(str);
}
template<> std::string Setting<Strings>::to_string()
{
return concatStringsSep(" ", value);
}
template<> void Setting<StringSet>::set(const std::string & str)
{
value = tokenizeString<StringSet>(str);
}
template<> std::string Setting<StringSet>::to_string()
{
return concatStringsSep(" ", value);
}
template class Setting<int>;

View file

@ -47,11 +47,13 @@ public:
void set(const std::string & name, const std::string & value);
void add(AbstractSetting * setting);
void addSetting(AbstractSetting * setting);
void warnUnused();
void warnUnknownSettings();
std::string dump();
StringMap getSettings();
void applyConfigFile(const Path & path, bool fatal = false);
};
class AbstractSetting
@ -83,10 +85,15 @@ protected:
virtual void set(const std::string & value) = 0;
virtual std::string to_string() = 0;
bool parseBool(const std::string & str);
std::string printBool(bool b);
};
struct DefaultSettingTag { };
/* A setting of type T. */
template<typename T>
template<typename T, typename Tag = DefaultSettingTag>
class Setting : public AbstractSetting
{
protected:
@ -103,10 +110,12 @@ public:
: AbstractSetting(name, description, aliases)
, value(def)
{
options->add(this);
options->addSetting(this);
}
operator const T &() const { return value; }
operator T &() { return value; }
const T & get() const { return value; }
bool operator ==(const T & v2) const { return value == v2; }
bool operator !=(const T & v2) const { return value != v2; }
void operator =(const T & v) { value = v; }
@ -123,6 +132,9 @@ std::ostream & operator <<(std::ostream & str, const Setting<T> & opt)
return str;
}
template<typename T>
bool operator ==(const T & v1, const Setting<T> & v2) { return v1 == (const T &) v2; }
/* A special setting for Paths. These are automatically canonicalised
(e.g. "/foo//bar/" becomes "/foo/bar"). */
class PathSetting : public Setting<Path>

View file

@ -436,30 +436,29 @@ static void performOp(ref<LocalStore> store, bool trusted, unsigned int clientVe
}
case wopSetOptions: {
from >> settings.keepFailed;
from >> settings.keepGoing;
settings.set("build-fallback", readInt(from) ? "true" : "false");
settings.keepFailed = readInt(from);
settings.keepGoing = readInt(from);
settings.tryFallback = readInt(from);
verbosity = (Verbosity) readInt(from);
settings.set("build-max-jobs", std::to_string(readInt(from)));
settings.set("build-max-silent-time", std::to_string(readInt(from)));
settings.maxSilentTime = readInt(from);
settings.useBuildHook = readInt(from) != 0;
settings.verboseBuild = lvlError == (Verbosity) readInt(from);
readInt(from); // obsolete logType
readInt(from); // obsolete printBuildTrace
settings.set("build-cores", std::to_string(readInt(from)));
settings.set("build-use-substitutes", readInt(from) ? "true" : "false");
settings.useSubstitutes = readInt(from);
if (GET_PROTOCOL_MINOR(clientVersion) >= 12) {
unsigned int n = readInt(from);
for (unsigned int i = 0; i < n; i++) {
string name = readString(from);
string value = readString(from);
if (name == "build-timeout" || name == "use-ssh-substituter")
if (name == "build-timeout")
settings.set(name, value);
else
settings.set(trusted ? name : "untrusted-" + name, value);
}
}
settings.update();
startWork();
stopWork();
break;

View file

@ -795,11 +795,11 @@ static void opServe(Strings opFlags, Strings opArgs)
settings.maxSilentTime = readInt(in);
settings.buildTimeout = readInt(in);
if (GET_PROTOCOL_MINOR(clientVersion) >= 2)
in >> settings.maxLogSize;
settings.maxLogSize = readNum<unsigned long>(in);
if (GET_PROTOCOL_MINOR(clientVersion) >= 3) {
settings.set("build-repeat", std::to_string(readInt(in)));
settings.set("enforce-determinism", readInt(in) != 0 ? "true" : "false");
settings.set("run-diff-hook", "true");
settings.buildRepeat = readInt(in);
settings.enforceDeterminism = readInt(in);
settings.runDiffHook = readInt(in);
}
settings.printRepeatedBuilds = false;
};

View file

@ -42,7 +42,6 @@ void mainWrapped(int argc, char * * argv)
NixArgs args;
args.parseCmdline(argvToStrings(argc, argv));
settings.update();
assert(args.command);

View file

@ -1,4 +1,4 @@
#! @ENV_PROG@ nix-shell
#! nix-shell -I nixpkgs=shell.nix --option use-binary-caches false
#! nix-shell -I nixpkgs=shell.nix --option build-use-substitutes false
#! nix-shell --pure -i bash -p foo bar
echo "$(foo) $(bar) $@"