1 files changed, 178 insertions, 0 deletions
diff --git a/third_party/nix/src/libstore/globals.cc b/third_party/nix/src/libstore/globals.cc
new file mode 100644
index 0000000000..6babb4589f
--- /dev/null
+++ b/third_party/nix/src/libstore/globals.cc
@@ -0,0 +1,178 @@
+#include "libstore/globals.hh"
+
+#include <algorithm>
+#include <filesystem>
+#include <map>
+#include <thread>
+
+#include <absl/strings/numbers.h>
+#include <absl/strings/str_cat.h>
+#include <absl/strings/str_split.h>
+#include <dlfcn.h>
+
+#include "libutil/archive.hh"
+#include "libutil/args.hh"
+#include "libutil/util.hh"
+#include "nix_config.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;
+
+static GlobalConfig::Register r1(&settings);
+
+Settings::Settings()
+    : nixPrefix(NIX_PREFIX),
+      nixStore(canonPath(
+          getEnv("NIX_STORE_DIR")
+              .value_or(getEnv("NIX_STORE").value_or(NIX_STORE_DIR)))),
+      nixDataDir(canonPath(getEnv("NIX_DATA_DIR").value_or(NIX_DATA_DIR))),
+      nixLogDir(canonPath(getEnv("NIX_LOG_DIR").value_or(NIX_LOG_DIR))),
+      nixStateDir(canonPath(getEnv("NIX_STATE_DIR").value_or(NIX_STATE_DIR))),
+      nixConfDir(canonPath(getEnv("NIX_CONF_DIR").value_or(NIX_CONF_DIR))),
+      nixLibexecDir(
+          canonPath(getEnv("NIX_LIBEXEC_DIR").value_or(NIX_LIBEXEC_DIR))),
+      nixBinDir(canonPath(getEnv("NIX_BIN_DIR").value_or(NIX_BIN_DIR))),
+      nixManDir(canonPath(NIX_MAN_DIR)),
+      nixDaemonSocketFile(canonPath(nixStateDir + DEFAULT_SOCKET_PATH)) {
+  buildUsersGroup = getuid() == 0 ? "nixbld" : "";
+  lockCPU = getEnv("NIX_AFFINITY_HACK").value_or("1") == "1";
+
+  caFile = getEnv("NIX_SSL_CERT_FILE")
+               .value_or(getEnv("SSL_CERT_FILE").value_or(""));
+  if (caFile.empty()) {
+    for (auto& fn :
+         {"/etc/ssl/certs/ca-certificates.crt",
+          "/nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt"}) {
+      if (pathExists(fn)) {
+        caFile = fn;
+        break;
+      }
+    }
+  }
+
+  /* Backwards compatibility. */
+  // TODO(tazjin): still?
+  auto s = getEnv("NIX_REMOTE_SYSTEMS");
+  if (s) {
+    Strings ss;
+    for (auto p : absl::StrSplit(*s, absl::ByChar(':'), absl::SkipEmpty())) {
+      ss.push_back(absl::StrCat("@", p));
+    }
+    builders = concatStringsSep(" ", ss);
+  }
+
+  sandboxPaths = absl::StrSplit("/bin/sh=" SANDBOX_SHELL,
+                                absl::ByAnyChar(" \t\n\r"), absl::SkipEmpty());
+}
+
+void loadConfFile() {
+  if (std::filesystem::exists(settings.nixConfDir + "/nix.conf")) {
+    globalConfig.applyConfigFile(settings.nixConfDir + "/nix.conf");
+  }
+
+  /* We only want to send overrides to the daemon, i.e. stuff from
+     ~/.nix/nix.conf or the command line. */
+  globalConfig.resetOverriden();
+
+  auto dirs = getConfigDirs();
+  // Iterate over them in reverse so that the ones appearing first in the path
+  // take priority
+  for (auto dir = dirs.rbegin(); dir != dirs.rend(); dir++) {
+    if (std::filesystem::exists(*dir + "/nix.conf")) {
+      globalConfig.applyConfigFile(*dir + "/nix/nix.conf");
+    }
+  }
+}
+
+unsigned int Settings::getDefaultCores() {
+  return std::max(1U, std::thread::hardware_concurrency());
+}
+
+StringSet Settings::getDefaultSystemFeatures() {
+  /* For backwards compatibility, accept some "features" that are
+     used in Nixpkgs to route builds to certain machines but don't
+     actually require anything special on the machines. */
+  StringSet features{"nixos-test", "benchmark", "big-parallel"};
+
+#if __linux__
+  if (access("/dev/kvm", R_OK | W_OK) == 0) {
+    features.insert("kvm");
+  }
+#endif
+
+  return features;
+}
+
+const std::string nixVersion = PACKAGE_VERSION;
+
+template <>
+void BaseSetting<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 BaseSetting<SandboxMode>::to_string() {
+  if (value == smEnabled) {
+    return "true";
+  }
+  if (value == smRelaxed) {
+    return "relaxed";
+  } else if (value == smDisabled) {
+    return "false";
+  } else {
+    abort();
+  }
+}
+
+template <>
+void BaseSetting<SandboxMode>::toJSON(JSONPlaceholder& out) {
+  AbstractSetting::toJSON(out);
+}
+
+template <>
+void BaseSetting<SandboxMode>::convertToArg(Args& args,
+                                            const std::string& category) {
+  args.mkFlag()
+      .longName(name)
+      .description("Enable sandboxing.")
+      .handler([=](const std::vector<std::string>& ss) { override(smEnabled); })
+      .category(category);
+  args.mkFlag()
+      .longName("no-" + name)
+      .description("Disable sandboxing.")
+      .handler(
+          [=](const std::vector<std::string>& ss) { override(smDisabled); })
+      .category(category);
+  args.mkFlag()
+      .longName("relaxed-" + name)
+      .description("Enable sandboxing, but allow builds to disable it.")
+      .handler([=](const std::vector<std::string>& ss) { override(smRelaxed); })
+      .category(category);
+}
+
+void MaxBuildJobsSetting::set(const std::string& str) {
+  if (str == "auto") {
+    value = std::max(1U, std::thread::hardware_concurrency());
+  } else if (!absl::SimpleAtoi(str, &value)) {
+    throw UsageError(
+        "configuration setting '%s' should be 'auto' or an integer", name);
+  }
+}
+
+}  // namespace nix