Move evaluator settings (type and global) to separate file/header

src/libexpr/eval.hh

@@ -787,98 +787,6 @@ struct InvalidPathError : EvalError
 #endif
 };
 
-struct EvalSettings : Config
-{
-    EvalSettings();
-
-    static Strings getDefaultNixPath();
-
-    static bool isPseudoUrl(std::string_view s);
-
-    static std::string resolvePseudoUrl(std::string_view url);
-
-    Setting<bool> enableNativeCode{this, false, "allow-unsafe-native-code-during-evaluation",
-        "Whether builtin functions that allow executing native code should be enabled."};
-
-    Setting<Strings> nixPath{
-        this, getDefaultNixPath(), "nix-path",
-        R"(
-          List of directories to be searched for `<...>` file references
-
-          In particular, outside of [pure evaluation mode](#conf-pure-evaluation), this determines the value of
-          [`builtins.nixPath`](@docroot@/language/builtin-constants.md#builtins-nixPath).
-        )"};
-
-    Setting<bool> restrictEval{
-        this, false, "restrict-eval",
-        R"(
-          If set to `true`, the Nix evaluator will not allow access to any
-          files outside of the Nix search path (as set via the `NIX_PATH`
-          environment variable or the `-I` option), or to URIs outside of
-          [`allowed-uris`](../command-ref/conf-file.md#conf-allowed-uris).
-          The default is `false`.
-        )"};
-
-    Setting<bool> pureEval{this, false, "pure-eval",
-        R"(
-          Pure evaluation mode ensures that the result of Nix expressions is fully determined by explicitly declared inputs, and not influenced by external state:
-
-          - Restrict file system and network access to files specified by cryptographic hash
-          - Disable [`bultins.currentSystem`](@docroot@/language/builtin-constants.md#builtins-currentSystem) and [`builtins.currentTime`](@docroot@/language/builtin-constants.md#builtins-currentTime)
-        )"
-        };
-
-    Setting<bool> enableImportFromDerivation{
-        this, true, "allow-import-from-derivation",
-        R"(
-          By default, Nix allows you to `import` from a derivation, allowing
-          building at evaluation time. With this option set to false, Nix will
-          throw an error when evaluating an expression that uses this feature,
-          allowing users to ensure their evaluation will not require any
-          builds to take place.
-        )"};
-
-    Setting<Strings> allowedUris{this, {}, "allowed-uris",
-        R"(
-          A list of URI prefixes to which access is allowed in restricted
-          evaluation mode. For example, when set to
-          `https://github.com/NixOS`, builtin functions such as `fetchGit` are
-          allowed to access `https://github.com/NixOS/patchelf.git`.
-        )"};
-
-    Setting<bool> traceFunctionCalls{this, false, "trace-function-calls",
-        R"(
-          If set to `true`, the Nix evaluator will trace every function call.
-          Nix will print a log message at the "vomit" level for every function
-          entrance and function exit.
-
-              function-trace entered undefined position at 1565795816999559622
-              function-trace exited undefined position at 1565795816999581277
-              function-trace entered /nix/store/.../example.nix:226:41 at 1565795253249935150
-              function-trace exited /nix/store/.../example.nix:226:41 at 1565795253249941684
-
-          The `undefined position` means the function call is a builtin.
-
-          Use the `contrib/stack-collapse.py` script distributed with the Nix
-          source code to convert the trace logs in to a format suitable for
-          `flamegraph.pl`.
-        )"};
-
-    Setting<bool> useEvalCache{this, true, "eval-cache",
-        "Whether to use the flake evaluation cache."};
-
-    Setting<bool> ignoreExceptionsDuringTry{this, false, "ignore-try",
-        R"(
-          If set to true, ignore exceptions inside 'tryEval' calls when evaluating nix expressions in
-          debug mode (using the --debugger flag). By default the debugger will pause on all exceptions.
-        )"};
-
-    Setting<bool> traceVerbose{this, false, "trace-verbose",
-        "Whether `builtins.traceVerbose` should trace its first argument when evaluated."};
-};
-
-extern EvalSettings evalSettings;
-
 static const std::string corepkgsPrefix{"/__corepkgs__/"};
 
 template<class ErrorType>