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Diffstat (limited to 'third_party/nix/src/libstore/globals.hh')
| -rw-r--r-- | third_party/nix/src/libstore/globals.hh | 464 |
1 files changed, 464 insertions, 0 deletions
diff --git a/third_party/nix/src/libstore/globals.hh b/third_party/nix/src/libstore/globals.hh new file mode 100644 index 000000000000..ed9b6a338e96 --- /dev/null +++ b/third_party/nix/src/libstore/globals.hh @@ -0,0 +1,464 @@ +#pragma once + +#include <limits> +#include <map> + +#include <sys/types.h> + +#include "libutil/config.hh" +#include "libutil/types.hh" +#include "libutil/util.hh" +#include "nix_config.h" + +namespace nix { + +typedef enum { smEnabled, smRelaxed, smDisabled } SandboxMode; + +struct MaxBuildJobsSetting : public BaseSetting<unsigned int> { + MaxBuildJobsSetting(Config* options, unsigned int def, + const std::string& name, const std::string& description, + const std::set<std::string>& aliases = {}) + : BaseSetting<unsigned int>(def, name, description, aliases) { + options->addSetting(this); + } + + void set(const std::string& str) override; +}; + +class Settings : public Config { + static unsigned int getDefaultCores(); + + static StringSet getDefaultSystemFeatures(); + + public: + Settings(); + + Path nixPrefix; + + /* 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 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; + + /* The directory where the man pages are stored. */ + Path nixManDir; + + /* File name of the socket the daemon listens to. */ + Path nixDaemonSocketFile; + + Setting<std::string> storeUri{this, getEnv("NIX_REMOTE").value_or("auto"), + "store", "The default Nix store to use."}; + + Setting<bool> keepFailed{ + this, false, "keep-failed", + "Whether to keep temporary directories of failed builds."}; + + Setting<bool> keepGoing{ + this, false, "keep-going", + "Whether to keep building derivations when another build fails."}; + + Setting<bool> tryFallback{ + this, + false, + "fallback", + "Whether to fall back to building when substitution fails.", + {"build-fallback"}}; + + /* Whether to show build log output in real time. */ + bool verboseBuild = true; + + Setting<size_t> logLines{ + this, 10, "log-lines", + "If verbose-build is false, the number of lines of the tail of " + "the log to show if a build fails."}; + + MaxBuildJobsSetting maxBuildJobs{this, + 1, + "max-jobs", + "Maximum number of parallel build jobs. " + "\"auto\" means use number of cores.", + {"build-max-jobs"}}; + + Setting<unsigned int> buildCores{ + this, + getDefaultCores(), + "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.", + {"build-cores"}}; + + /* Read-only mode. Don't copy stuff to the store, don't change + the database. */ + bool readOnlyMode = false; + + Setting<std::string> thisSystem{this, SYSTEM, "system", + "The canonical Nix system name."}; + + Setting<time_t> maxSilentTime{ + this, + 0, + "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.", + {"build-max-silent-time"}}; + + Setting<time_t> buildTimeout{ + this, + 0, + "timeout", + "The maximum duration in seconds that a builder can run. " + "0 means infinity.", + {"build-timeout"}}; + + PathSetting buildHook{this, true, nixLibexecDir + "/nix/build-remote", + "build-hook", + "The path of the helper program that executes builds " + "to remote machines."}; + + Setting<std::string> builders{this, "@" + nixConfDir + "/machines", + "builders", + "A semicolon-separated list of build machines, " + "in the format of nix.machines."}; + + Setting<bool> buildersUseSubstitutes{ + this, false, "builders-use-substitutes", + "Whether build machines should use their own substitutes for obtaining " + "build dependencies if possible, rather than waiting for this host to " + "upload them."}; + + Setting<off_t> reservedSize{ + this, 8 * 1024 * 1024, "gc-reserved-space", + "Amount of reserved disk space for the garbage collector."}; + + Setting<bool> fsyncMetadata{this, true, "fsync-metadata", + "Whether SQLite should use fsync()."}; + + Setting<bool> useSQLiteWAL{this, true, "use-sqlite-wal", + "Whether SQLite should use WAL mode."}; + + Setting<bool> syncBeforeRegistering{ + this, false, "sync-before-registering", + "Whether to call sync() before registering a path as valid."}; + + Setting<bool> useSubstitutes{this, + true, + "substitute", + "Whether to use substitutes.", + {"build-use-substitutes"}}; + + Setting<std::string> buildUsersGroup{ + this, "", "build-users-group", + "The Unix group that contains the build users."}; + + Setting<bool> impersonateLinux26{ + this, + false, + "impersonate-linux-26", + "Whether to impersonate a Linux 2.6 machine on newer kernels.", + {"build-impersonate-linux-26"}}; + + Setting<bool> keepLog{this, + true, + "keep-build-log", + "Whether to store build logs.", + {"build-keep-log"}}; + + Setting<bool> compressLog{this, + true, + "compress-build-log", + "Whether to compress logs.", + {"build-compress-log"}}; + + Setting<unsigned long> maxLogSize{ + this, + 0, + "max-build-log-size", + "Maximum number of bytes a builder can write to stdout/stderr " + "before being killed (0 means no limit).", + {"build-max-log-size"}}; + + /* When buildRepeat > 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; + + Setting<unsigned int> pollInterval{ + this, 5, "build-poll-interval", + "How often (in seconds) to poll for locks."}; + + Setting<bool> checkRootReachability{ + this, false, "gc-check-reachability", + "Whether to check if new GC roots can in fact be found by the " + "garbage collector."}; + + Setting<bool> gcKeepOutputs{ + this, + false, + "keep-outputs", + "Whether the garbage collector should keep outputs of live derivations.", + {"gc-keep-outputs"}}; + + Setting<bool> gcKeepDerivations{ + this, + true, + "keep-derivations", + "Whether the garbage collector should keep derivers of live paths.", + {"gc-keep-derivations"}}; + + Setting<bool> autoOptimiseStore{this, false, "auto-optimise-store", + "Whether to automatically replace files with " + "identical contents with hard links."}; + + Setting<bool> envKeepDerivations{ + this, + false, + "keep-env-derivations", + "Whether to add derivations as a dependency of user environments " + "(to prevent them from being GCed).", + {"env-keep-derivations"}}; + + /* Whether to lock the Nix client and worker to the same CPU. */ + bool lockCPU; + + /* Whether to show a stack trace if Nix evaluation fails. */ + Setting<bool> showTrace{ + this, false, "show-trace", + "Whether to show a stack trace on evaluation errors."}; + + Setting<SandboxMode> sandboxMode { + this, +#if __linux__ + smEnabled +#else + smDisabled +#endif + , + "sandbox", + "Whether to enable sandboxed builds. Can be \"true\", \"false\" or " + "\"relaxed\".", + { + "build-use-chroot", "build-use-sandbox" + } + }; + + Setting<PathSet> sandboxPaths{ + this, + {}, + "sandbox-paths", + "The paths to make available inside the build sandbox.", + {"build-chroot-dirs", "build-sandbox-paths"}}; + + Setting<bool> sandboxFallback{ + this, true, "sandbox-fallback", + "Whether to disable sandboxing when the kernel doesn't allow it."}; + + Setting<PathSet> extraSandboxPaths{ + this, + {}, + "extra-sandbox-paths", + "Additional paths to make available inside the build sandbox.", + {"build-extra-chroot-dirs", "build-extra-sandbox-paths"}}; + + Setting<size_t> buildRepeat{ + this, + 0, + "repeat", + "The number of times to repeat a build in order to verify determinism.", + {"build-repeat"}}; + +#if __linux__ + Setting<std::string> sandboxShmSize{ + this, "50%", "sandbox-dev-shm-size", + "The size of /dev/shm in the build sandbox."}; + + Setting<Path> sandboxBuildDir{this, "/build", "sandbox-build-dir", + "The build directory inside the sandbox."}; +#endif + + Setting<PathSet> allowedImpureHostPrefixes{ + this, + {}, + "allowed-impure-host-deps", + "Which prefixes to allow derivations to ask for access to (primarily for " + "Darwin)."}; + + 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."}; + + PathSetting diffHook{ + this, true, "", "diff-hook", + "A program that prints out the differences between the two paths " + "specified on its command line."}; + + Setting<bool> enforceDeterminism{ + this, true, "enforce-determinism", + "Whether to fail if repeated builds produce different output."}; + + Setting<Strings> trustedPublicKeys{ + this, + {"cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="}, + "trusted-public-keys", + "Trusted public keys for secure substitution.", + {"binary-cache-public-keys"}}; + + Setting<Strings> secretKeyFiles{ + this, + {}, + "secret-key-files", + "Secret keys with which to sign local builds."}; + + Setting<unsigned int> tarballTtl{ + this, 60 * 60, "tarball-ttl", + "How long downloaded files are considered up-to-date."}; + + Setting<bool> requireSigs{ + this, true, "require-sigs", + "Whether to check that any non-content-addressed path added to the " + "Nix store has a valid signature (that is, one signed using a key " + "listed in 'trusted-public-keys'."}; + + Setting<StringSet> extraPlatforms{ + this, + std::string{SYSTEM} == "x86_64-linux" ? StringSet{"i686-linux"} + : StringSet{}, + "extra-platforms", + "Additional platforms that can be built on the local system. " + "These may be supported natively (e.g. armv7 on some aarch64 CPUs " + "or using hacks like qemu-user."}; + + Setting<StringSet> systemFeatures{ + this, getDefaultSystemFeatures(), "system-features", + "Optional features that this system implements (like \"kvm\")."}; + + 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"}}; + + // FIXME: provide a way to add to option values. + Setting<Strings> extraSubstituters{this, + {}, + "extra-substituters", + "Additional URIs of substituters.", + {"extra-binary-caches"}}; + + Setting<StringSet> trustedSubstituters{ + this, + {}, + "trusted-substituters", + "Disabled substituters that may be enabled via the substituters option " + "by untrusted users.", + {"trusted-binary-caches"}}; + + Setting<Strings> trustedUsers{this, + {"root"}, + "trusted-users", + "Which users or groups are trusted to ask the " + "daemon to do unsafe things."}; + + Setting<unsigned int> ttlNegativeNarInfoCache{ + this, 3600, "narinfo-cache-negative-ttl", + "The TTL in seconds for negative lookups in the disk cache i.e binary " + "cache lookups that " + "return an invalid path result"}; + + Setting<unsigned int> ttlPositiveNarInfoCache{ + this, 30 * 24 * 3600, "narinfo-cache-positive-ttl", + "The TTL in seconds for positive lookups in the disk cache i.e binary " + "cache lookups that " + "return a valid path result."}; + + /* ?Who we trust to use the daemon in safe ways */ + Setting<Strings> allowedUsers{ + this, + {"*"}, + "allowed-users", + "Which users or groups are allowed to connect to the daemon."}; + + Setting<bool> printMissing{ + this, true, "print-missing", + "Whether to print what paths need to be built or downloaded."}; + + Setting<std::string> preBuildHook{ + this, "", "pre-build-hook", + "A program to run just before a build to set derivation-specific build " + "settings."}; + + Setting<std::string> postBuildHook{ + this, "", "post-build-hook", + "A program to run just after each successful build."}; + + 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; + +#if __linux__ + Setting<bool> filterSyscalls{ + this, true, "filter-syscalls", + "Whether to prevent certain dangerous system calls, such as " + "creation of setuid/setgid files or adding ACLs or extended " + "attributes. Only disable this if you're aware of the " + "security implications."}; + + Setting<bool> allowNewPrivileges{ + this, false, "allow-new-privileges", + "Whether builders can acquire new privileges by calling programs with " + "setuid/setgid bits or with file capabilities."}; +#endif + + Setting<Strings> hashedMirrors{ + this, + {"http://tarballs.nixos.org/"}, + "hashed-mirrors", + "A list of servers used by builtins.fetchurl to fetch files by hash."}; + + Setting<uint64_t> minFree{this, 0, "min-free", + "Automatically run the garbage collector when free " + "disk space drops below the specified amount."}; + + Setting<uint64_t> maxFree{this, std::numeric_limits<uint64_t>::max(), + "max-free", + "Stop deleting garbage when free disk space is " + "above the specified amount."}; + + Setting<uint64_t> minFreeCheckInterval{ + this, 5, "min-free-check-interval", + "Number of seconds between checking free disk space."}; +}; + +// FIXME: don't use a global variable. +extern Settings settings; + +void loadConfFile(); + +extern const std::string nixVersion; + +} // namespace nix |