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Diffstat (limited to 'nix/libstore/globals.hh')
| -rw-r--r-- | nix/libstore/globals.hh | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/nix/libstore/globals.hh b/nix/libstore/globals.hh new file mode 100644 index 0000000000..711c365294 --- /dev/null +++ b/nix/libstore/globals.hh @@ -0,0 +1,218 @@ +#pragma once + +#include "types.hh" + +#include <map> +#include <sys/types.h> + + +namespace nix { + + +struct Settings { + + typedef std::map<string, string> SettingsMap; + + Settings(); + + void processEnvironment(); + + void loadConfFile(); + + void set(const string & name, const string & value); + + void update(); + + string pack(); + + void unpack(const string & pack); + + SettingsMap getOverrides(); + + /* The directory where we store sources and derived files. */ + Path nixStore; + + Path nixDataDir; /* !!! fix */ + + /* The directory where we log various operations. */ + Path nixLogDir; + + /* The directory where state is stored. */ + Path nixStateDir; + + /* The directory where we keep the SQLite database. */ + Path nixDBPath; + + /* The directory where configuration files are stored. */ + Path nixConfDir; + + /* The directory where internal helper programs are stored. */ + Path nixLibexecDir; + + /* The directory where the main programs are stored. */ + Path nixBinDir; + + /* File name of the socket the daemon listens to. */ + Path nixDaemonSocketFile; + + /* Whether to keep temporary directories of failed builds. */ + bool keepFailed; + + /* Whether to keep building subgoals when a sibling (another + subgoal of the same goal) fails. */ + bool keepGoing; + + /* Whether, if we cannot realise the known closure corresponding + to a derivation, we should try to normalise the derivation + instead. */ + bool tryFallback; + + /* Verbosity level for build output. */ + Verbosity buildVerbosity; + + /* Maximum number of parallel build jobs. 0 means unlimited. */ + unsigned int maxBuildJobs; + + /* 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; + + /* Read-only mode. Don't copy stuff to the store, don't change + the database. */ + bool readOnlyMode; + + /* The canonical system name, as returned by config.guess. */ + string thisSystem; + + /* 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; + + /* The maximum duration in seconds that a builder can run. 0 + means infinity. */ + time_t buildTimeout; + + /* The substituters. There are programs that can somehow realise + a store path without building, e.g., by downloading it or + copying it from a CD. */ + Paths substituters; + + /* Whether to use build hooks (for distributed builds). Sometimes + users want to disable this from the command-line. */ + bool useBuildHook; + + /* Whether buildDerivations() should print out lines on stderr in + a fixed format to allow its progress to be monitored. Each + line starts with a "@". The following are defined: + + @ build-started <drvpath> <outpath> <system> <logfile> + @ build-failed <drvpath> <outpath> <exitcode> <error text> + @ build-succeeded <drvpath> <outpath> + @ substituter-started <outpath> <substituter> + @ substituter-failed <outpath> <exitcode> <error text> + @ substituter-succeeded <outpath> + + Best combined with --no-build-output, otherwise stderr might + conceivably contain lines in this format printed by the + builders. */ + bool printBuildTrace; + + /* Amount of reserved space for the garbage collector + (/nix/var/nix/db/reserved). */ + off_t reservedSize; + + /* Whether SQLite should use fsync. */ + bool fsyncMetadata; + + /* Whether SQLite should use WAL mode. */ + bool useSQLiteWAL; + + /* Whether to call sync() before registering a path as valid. */ + bool syncBeforeRegistering; + + /* Whether to use substitutes. */ + bool useSubstitutes; + + /* The Unix group that contains the build users. */ + string buildUsersGroup; + + /* Whether to build in chroot. */ + bool useChroot; + + /* The directories from the host filesystem to be included in the + chroot. */ + StringSet dirsInChroot; + + /* Set of ssh connection strings for the ssh substituter */ + Strings sshSubstituterHosts; + + /* Whether to use the ssh substituter at all */ + bool useSshSubstituter; + + /* Whether to impersonate a Linux 2.6 machine on newer kernels. */ + bool impersonateLinux26; + + /* 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; + + /* Whether to cache build failures. */ + bool cacheFailure; + + /* How often (in seconds) to poll for locks. */ + unsigned int pollInterval; + + /* Whether to check if new GC roots can in fact be found by the + garbage collector. */ + bool checkRootReachability; + + /* Whether the garbage collector should keep outputs of live + derivations. */ + bool gcKeepOutputs; + + /* Whether the garbage collector should keep derivers of live + paths. */ + bool gcKeepDerivations; + + /* Whether to automatically replace files with identical contents + with hard links. */ + bool autoOptimiseStore; + + /* Whether to add derivations as a dependency of user environments + (to prevent them from being GCed). */ + bool envKeepDerivations; + + /* 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; + +private: + SettingsMap settings, overrides; + + void get(string & res, const string & name); + void get(bool & res, const string & name); + void get(StringSet & res, const string & name); + void get(Strings & res, const string & name); + template<class N> void get(N & res, const string & name); +}; + + +// FIXME: don't use a global variable. +extern Settings settings; + + +extern const string nixVersion; + + +} |