diff --git a/doc/manual/rl-next/build-hook-default.md b/doc/manual/rl-next/build-hook-default.md new file mode 100644 index 000000000000..a1b726bb2edc --- /dev/null +++ b/doc/manual/rl-next/build-hook-default.md @@ -0,0 +1,16 @@ +--- +synopsis: The "build-hook" setting" default is less useful when using `libnixstore` as a library +prs: +- 11178 +--- + +*This is an obscure issue just affecting uses of `libnixstore` the library outside of the Nix executable.* + +As part the ongoing [rewrite of the build system](https://github.com/NixOS/nix/issues/2503) to use [Meson](https://mesonbuild.com/), we are also switching to packaging individual Nix components separately (and building them in separate derivations). +This means that when building `libnixstore` we do not know where the Nix binaries will be installed --- `libnixstore` doesn't know about downstream consumers like the Nix binaries at all. +This has a small adverse affect on remote building --- the `build-remote` executable that is specified from the `build-hook` setting will not be gotten from the (presumed) installation location, but instead looked up on the `PATH`. +This means that other applications linking `libnixstore` that wish to use remote building must arrange for the `nix` command to be on the PATH (or manually overriding the setting) in order for that to work. + +Long term we don't envision this being a downside, because we plan to [get rid of `build-remote` and the build hook setting entirely](https://github.com/NixOS/nix/issues/1221). +There is simply no need to add a second layer of remote-procedure-calling when we want to connect to a remote builder. +When the build hook protocol did in principle support custom ways of remote building, that can also be accomplished with a customer service for the ssh or daemon/ssh-ng protocols, or with a custom store class. diff --git a/src/libcmd/repl.cc b/src/libcmd/repl.cc index efc04b029fc3..e7c43367c24a 100644 --- a/src/libcmd/repl.cc +++ b/src/libcmd/repl.cc @@ -7,7 +7,6 @@ #include "ansicolor.hh" #include "shared.hh" -#include "config-global.hh" #include "eval.hh" #include "eval-settings.hh" #include "attr-path.hh" @@ -77,10 +76,14 @@ struct NixRepl int displ; StringSet varNames; + RunNix * runNixPtr; + + void runNix(Path program, const Strings & args, const std::optional & input = {}); + std::unique_ptr interacter; NixRepl(const LookupPath & lookupPath, nix::ref store,ref state, - std::function getValues); + std::function getValues, RunNix * runNix); virtual ~NixRepl() = default; ReplExitStatus mainLoop() override; @@ -125,32 +128,16 @@ std::string removeWhitespace(std::string s) NixRepl::NixRepl(const LookupPath & lookupPath, nix::ref store, ref state, - std::function getValues) + std::function getValues, RunNix * runNix = nullptr) : AbstractNixRepl(state) , debugTraceIndex(0) , getValues(getValues) , staticEnv(new StaticEnv(nullptr, state->staticBaseEnv.get())) + , runNixPtr{runNix} , interacter(make_unique(getDataDir() + "/nix/repl-history")) { } -void runNix(Path program, const Strings & args, - const std::optional & input = {}) -{ - auto subprocessEnv = getEnv(); - subprocessEnv["NIX_CONFIG"] = globalConfig.toKeyValue(); - //isInteractive avoid grabling interactive commands - runProgram2(RunOptions { - .program = settings.nixBinDir+ "/" + program, - .args = args, - .environment = subprocessEnv, - .input = input, - .isInteractive = true, - }); - - return; -} - static std::ostream & showDebugTrace(std::ostream & out, const PosTable & positions, const DebugTrace & dt) { if (dt.isError) @@ -833,9 +820,18 @@ void NixRepl::evalString(std::string s, Value & v) } +void NixRepl::runNix(Path program, const Strings & args, const std::optional & input) +{ + if (runNixPtr) + (*runNixPtr)(program, args, input); + else + throw Error("Cannot run '%s', no method of calling the Nix CLI provided", program); +} + + std::unique_ptr AbstractNixRepl::create( const LookupPath & lookupPath, nix::ref store, ref state, - std::function getValues) + std::function getValues, RunNix * runNix) { return std::make_unique( lookupPath, diff --git a/src/libcmd/repl.hh b/src/libcmd/repl.hh index 3fd4b2c391ac..cdf27af0b284 100644 --- a/src/libcmd/repl.hh +++ b/src/libcmd/repl.hh @@ -19,9 +19,19 @@ struct AbstractNixRepl typedef std::vector> AnnotatedValues; + using RunNix = void(Path program, const Strings & args, const std::optional & input); + + /** + * @param runNix Function to run the nix CLI to support various + * `:` commands. Can not be provided, in which case + * everything else will still work fine, but those commands won't. + */ static std::unique_ptr create( - const LookupPath & lookupPath, nix::ref store, ref state, - std::function getValues); + const LookupPath & lookupPath, + nix::ref store, + ref state, + std::function getValues, + RunNix * runNix = nullptr); static ReplExitStatus runSimple( ref evalState, diff --git a/src/libstore/globals.cc b/src/libstore/globals.cc index 439a6f97c085..52ab35b4ce5c 100644 --- a/src/libstore/globals.cc +++ b/src/libstore/globals.cc @@ -64,7 +64,6 @@ Settings::Settings() , nixStateDir(canonPath(getEnvNonEmpty("NIX_STATE_DIR").value_or(NIX_STATE_DIR))) , nixConfDir(canonPath(getEnvNonEmpty("NIX_CONF_DIR").value_or(NIX_CONF_DIR))) , nixUserConfFiles(getUserConfigFiles()) - , nixBinDir(canonPath(getEnvNonEmpty("NIX_BIN_DIR").value_or(NIX_BIN_DIR))) , nixManDir(canonPath(NIX_MAN_DIR)) , nixDaemonSocketFile(canonPath(getEnvNonEmpty("NIX_DAEMON_SOCKET_PATH").value_or(nixStateDir + DEFAULT_SOCKET_PATH))) { @@ -95,34 +94,6 @@ Settings::Settings() sandboxPaths = tokenizeString("/System/Library/Frameworks /System/Library/PrivateFrameworks /bin/sh /bin/bash /private/tmp /private/var/tmp /usr/lib"); allowedImpureHostPrefixes = tokenizeString("/System/Library /usr/lib /dev /bin/sh"); #endif - - /* Set the build hook location - - For builds we perform a self-invocation, so Nix has to be self-aware. - That is, it has to know where it is installed. We don't think it's sentient. - - Normally, nix is installed according to `nixBinDir`, which is set at compile time, - but can be overridden. This makes for a great default that works even if this - code is linked as a library into some other program whose main is not aware - that it might need to be a build remote hook. - - However, it may not have been installed at all. For example, if it's a static build, - there's a good chance that it has been moved out of its installation directory. - That makes `nixBinDir` useless. Instead, we'll query the OS for the path to the - current executable, using `getSelfExe()`. - - As a last resort, we resort to `PATH`. Hopefully we find a `nix` there that's compatible. - If you're porting Nix to a new platform, that might be good enough for a while, but - you'll want to improve `getSelfExe()` to work on your platform. - */ - std::string nixExePath = nixBinDir + "/nix"; - if (!pathExists(nixExePath)) { - nixExePath = getSelfExe().value_or("nix"); - } - buildHook = { - nixExePath, - "__build-remote", - }; } void loadConfFile(AbstractConfig & config) diff --git a/src/libstore/globals.hh b/src/libstore/globals.hh index 8760c9d145b2..a0b0a1e352ee 100644 --- a/src/libstore/globals.hh +++ b/src/libstore/globals.hh @@ -84,11 +84,6 @@ public: */ std::vector nixUserConfFiles; - /** - * The directory where the main programs are stored. - */ - Path nixBinDir; - /** * The directory where the man pages are stored. */ @@ -246,7 +241,7 @@ public: )", {"build-timeout"}}; - Setting buildHook{this, {}, "build-hook", + Setting buildHook{this, {"nix", "__build-remote"}, "build-hook", R"( The path to the helper program that executes remote builds. diff --git a/src/libstore/local.mk b/src/libstore/local.mk index 5dc8f3370bc2..88be6a366282 100644 --- a/src/libstore/local.mk +++ b/src/libstore/local.mk @@ -71,7 +71,6 @@ libstore_CXXFLAGS += \ -DNIX_STATE_DIR=\"$(NIX_ROOT)$(localstatedir)/nix\" \ -DNIX_LOG_DIR=\"$(NIX_ROOT)$(localstatedir)/log/nix\" \ -DNIX_CONF_DIR=\"$(NIX_ROOT)$(sysconfdir)/nix\" \ - -DNIX_BIN_DIR=\"$(NIX_ROOT)$(bindir)\" \ -DNIX_MAN_DIR=\"$(NIX_ROOT)$(mandir)\" \ -DLSOF=\"$(NIX_ROOT)$(lsof)\" diff --git a/src/libstore/meson.build b/src/libstore/meson.build index 50b15e15dc79..d2cc235fde3b 100644 --- a/src/libstore/meson.build +++ b/src/libstore/meson.build @@ -328,7 +328,6 @@ prefix = get_option('prefix') path_opts = [ # Meson built-ins. 'datadir', - 'bindir', 'mandir', 'libdir', 'includedir', @@ -373,7 +372,6 @@ cpp_str_defines = { 'NIX_STATE_DIR': state_dir / 'nix', 'NIX_LOG_DIR': log_dir, 'NIX_CONF_DIR': sysconfdir / 'nix', - 'NIX_BIN_DIR': bindir, 'NIX_MAN_DIR': mandir, } diff --git a/src/libstore/unix/build/hook-instance.cc b/src/libstore/unix/build/hook-instance.cc index d73d86ff27ff..4f8492fe92ad 100644 --- a/src/libstore/unix/build/hook-instance.cc +++ b/src/libstore/unix/build/hook-instance.cc @@ -4,6 +4,7 @@ #include "file-system.hh" #include "child.hh" #include "strings.hh" +#include "executable-path.hh" namespace nix { @@ -16,11 +17,18 @@ HookInstance::HookInstance() if (buildHookArgs.empty()) throw Error("'build-hook' setting is empty"); - auto buildHook = canonPath(buildHookArgs.front()); + std::filesystem::path buildHook = buildHookArgs.front(); buildHookArgs.pop_front(); + try { + buildHook = ExecutablePath::load().findPath(buildHook); + } catch (ExecutableLookupError & e) { + e.addTrace(nullptr, "while resolving the 'build-hook' setting'"); + throw; + } + Strings args; - args.push_back(std::string(baseNameOf(buildHook))); + args.push_back(buildHook.filename().string()); for (auto & arg : buildHookArgs) args.push_back(arg); @@ -59,7 +67,7 @@ HookInstance::HookInstance() if (dup2(builderOut.readSide.get(), 5) == -1) throw SysError("dupping builder's stdout/stderr"); - execv(buildHook.c_str(), stringsToCharPtrs(args).data()); + execv(buildHook.native().c_str(), stringsToCharPtrs(args).data()); throw SysError("executing '%s'", buildHook); }); diff --git a/src/libutil/executable-path.cc b/src/libutil/executable-path.cc index a976cd7ebd53..a89094a733cf 100644 --- a/src/libutil/executable-path.cc +++ b/src/libutil/executable-path.cc @@ -59,7 +59,7 @@ OsString ExecutablePath::render() const } std::optional -ExecutablePath::find(const OsString & exe, std::function isExecutable) const +ExecutablePath::findName(const OsString & exe, std::function isExecutable) const { // "If the pathname being sought contains a , the search // through the path prefixes shall not be performed." @@ -75,4 +75,20 @@ ExecutablePath::find(const OsString & exe, std::function return std::nullopt; } +fs::path ExecutablePath::findPath(const fs::path & exe, std::function isExecutable) const +{ + // "If the pathname being sought contains a , the search + // through the path prefixes shall not be performed." + // https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html#tag_08_03 + if (exe.filename() == exe) { + auto resOpt = findName(exe); + if (resOpt) + return *resOpt; + else + throw ExecutableLookupError("Could not find executable '%s'", exe.native()); + } else { + return exe; + } +} + } // namespace nix diff --git a/src/libutil/executable-path.hh b/src/libutil/executable-path.hh index 16a8eb9688ce..084e7a5aff26 100644 --- a/src/libutil/executable-path.hh +++ b/src/libutil/executable-path.hh @@ -5,6 +5,8 @@ namespace nix { +MakeError(ExecutableLookupError, Error); + struct ExecutablePath { std::vector directories; @@ -54,10 +56,22 @@ struct ExecutablePath * * @return path to a resolved executable */ - std::optional find( + std::optional findName( const OsString & exe, std::function isExecutable = isExecutableAmbient) const; + /** + * Like the `findName` but takes a path, not just an executable + * name. + * + * This implements the full POSIX spec: if the path is just a name, + * it searches like the above. Otherwise, it returns the path as is. + * If (in the name case) the search fails, an exception is thrown. + */ + std::filesystem::path findPath( + const std::filesystem::path & exe, + std::function isExecutable = isExecutableAmbient) const; + bool operator==(const ExecutablePath &) const = default; }; diff --git a/src/nix-channel/nix-channel.cc b/src/nix-channel/nix-channel.cc index 9f7f557b59db..743e77fb7029 100644 --- a/src/nix-channel/nix-channel.cc +++ b/src/nix-channel/nix-channel.cc @@ -7,6 +7,7 @@ #include "eval-settings.hh" // for defexpr #include "users.hh" #include "tarball.hh" +#include "bin-dir.hh" #include #include @@ -67,7 +68,7 @@ static void removeChannel(const std::string & name) channels.erase(name); writeChannels(); - runProgram(settings.nixBinDir + "/nix-env", true, { "--profile", profile, "--uninstall", name }); + runProgram(getNixBin("nix-env").string(), true, { "--profile", profile, "--uninstall", name }); } static Path nixDefExpr; @@ -118,7 +119,7 @@ static void update(const StringSet & channelNames) bool unpacked = false; if (std::regex_search(filename, std::regex("\\.tar\\.(gz|bz2|xz)$"))) { - runProgram(settings.nixBinDir + "/nix-build", false, { "--no-out-link", "--expr", "import " + unpackChannelPath + + runProgram(getNixBin("nix-build").string(), false, { "--no-out-link", "--expr", "import " + unpackChannelPath + "{ name = \"" + cname + "\"; channelName = \"" + name + "\"; src = builtins.storePath \"" + filename + "\"; }" }); unpacked = true; } @@ -143,7 +144,7 @@ static void update(const StringSet & channelNames) for (auto & expr : exprs) envArgs.push_back(std::move(expr)); envArgs.push_back("--quiet"); - runProgram(settings.nixBinDir + "/nix-env", false, envArgs); + runProgram(getNixBin("nix-env").string(), false, envArgs); // Make the channels appear in nix-env. struct stat st; @@ -244,7 +245,7 @@ static int main_nix_channel(int argc, char ** argv) case cListGenerations: if (!args.empty()) throw UsageError("'--list-generations' expects no arguments"); - std::cout << runProgram(settings.nixBinDir + "/nix-env", false, {"--profile", profile, "--list-generations"}) << std::flush; + std::cout << runProgram(getNixBin("nix-env").string(), false, {"--profile", profile, "--list-generations"}) << std::flush; break; case cRollback: if (args.size() > 1) @@ -256,7 +257,7 @@ static int main_nix_channel(int argc, char ** argv) } else { envArgs.push_back("--rollback"); } - runProgram(settings.nixBinDir + "/nix-env", false, envArgs); + runProgram(getNixBin("nix-env").string(), false, envArgs); break; } diff --git a/src/nix/bin-dir.cc b/src/nix/bin-dir.cc new file mode 100644 index 000000000000..89cc0ae736c8 --- /dev/null +++ b/src/nix/bin-dir.cc @@ -0,0 +1,38 @@ +#include "current-process.hh" +#include "file-system.hh" +#include "globals.hh" +#include "bin-dir.hh" + +namespace nix { + +namespace fs = std::filesystem; + +fs::path getNixBin(std::optional binaryNameOpt) +{ + auto getBinaryName = [&] { return binaryNameOpt ? *binaryNameOpt : "nix"; }; + + // If the environment variable is set, use it unconditionally + if (auto envOpt = getEnvNonEmpty("NIX_BIN_DIR")) + return fs::path{*envOpt} / std::string{getBinaryName()}; + + // Use some-times avaiable OS tricks to get to the path of this Nix, and try that + if (auto selfOpt = getSelfExe()) { + fs::path path{*selfOpt}; + if (binaryNameOpt) + path = path.parent_path() / std::string{*binaryNameOpt}; + if (fs::exists(path)) + return path; + } + + // If `nix` exists at the hardcoded fallback path, use it. + { + auto path = fs::path{NIX_BIN_DIR} / std::string{getBinaryName()}; + if (fs::exists(path)) + return path; + } + + // return just the name, hoping the exe is on the `PATH` + return getBinaryName(); +} + +} diff --git a/src/nix/bin-dir.hh b/src/nix/bin-dir.hh new file mode 100644 index 000000000000..0772afa67ef5 --- /dev/null +++ b/src/nix/bin-dir.hh @@ -0,0 +1,31 @@ +#pragma once +///@file + +#include + +namespace nix { + +/** + * Get a path to the given Nix binary. + * + * Normally, nix is installed according to `NIX_BIN_DIR`, which is set + * at compile time, but can be overridden. + * + * However, it may not have been installed at all. For example, if it's + * a static build, there's a good chance that it has been moved out of + * its installation directory. That makes `NIX_BIN_DIR` useless. + * Instead, we'll query the OS for the path to the current executable, + * using `getSelfExe()`. + * + * As a last resort, we resort to `PATH`. Hopefully we find a `nix` + * there that's compatible. If you're porting Nix to a new platform, + * that might be good enough for a while, but you'll want to improve + * `getSelfExe()` to work on your platform. + * + * @param binary_name the exact binary name we're looking up. Might be + * `nix-*` instead of `nix` for the legacy CLI commands. Optional to use + * current binary name. + */ +std::filesystem::path getNixBin(std::optional binary_name = {}); + +} diff --git a/src/nix/local.mk b/src/nix/local.mk index 28b30b58619f..b57f6b3e2f9e 100644 --- a/src/nix/local.mk +++ b/src/nix/local.mk @@ -26,6 +26,8 @@ endif nix_CXXFLAGS += $(INCLUDE_libutil) $(INCLUDE_libstore) $(INCLUDE_libfetchers) $(INCLUDE_libexpr) $(INCLUDE_libflake) $(INCLUDE_libmain) -I src/libcmd -I doc/manual $(INCLUDE_nix) +nix_CXXFLAGS += -DNIX_BIN_DIR=\"$(NIX_ROOT)$(bindir)\" + nix_LIBS = libexpr libmain libfetchers libflake libstore libutil libcmd nix_LDFLAGS = $(THREAD_LDFLAGS) $(SODIUM_LIBS) $(EDITLINE_LIBS) $(BOOST_LDFLAGS) $(LOWDOWN_LIBS) diff --git a/src/nix/main.cc b/src/nix/main.cc index 9d7d617ccda5..0c9f2442c998 100644 --- a/src/nix/main.cc +++ b/src/nix/main.cc @@ -19,6 +19,7 @@ #include "network-proxy.hh" #include "eval-cache.hh" #include "flake/flake.hh" +#include "bin-dir.hh" #include #include @@ -366,6 +367,17 @@ void mainWrapped(int argc, char * * argv) initGC(); flake::initLib(flakeSettings); + /* Set the build hook location + + For builds we perform a self-invocation, so Nix has to be + self-aware. That is, it has to know where it is installed. We + don't think it's sentient. + */ + settings.buildHook.setDefault(Strings { + getNixBin({}).string(), + "__build-remote", + }); + #if __linux__ if (isRootUser()) { try { diff --git a/src/nix/meson.build b/src/nix/meson.build index 7405548de0cf..65d8f45f1fd7 100644 --- a/src/nix/meson.build +++ b/src/nix/meson.build @@ -33,6 +33,21 @@ subdir('build-utils-meson/threads') subdir('build-utils-meson/export-all-symbols') +configdata = configuration_data() + +fs = import('fs') + +bindir = get_option('bindir') +if not fs.is_absolute(bindir) + bindir = get_option('prefix') / bindir +endif +configdata.set_quoted('NIX_BIN_DIR', bindir) + +config_h = configure_file( + configuration : configdata, + output : 'config-nix-cli.hh', +) + add_project_arguments( # TODO(Qyriad): Yes this is how the autoconf+Make system did it. # It would be nice for our headers to be idempotent instead. @@ -42,15 +57,17 @@ add_project_arguments( #'-include', 'config-fetchers.hh', '-include', 'config-main.hh', '-include', 'config-cmd.hh', + '-include', 'config-nix-cli.hh', language : 'cpp', ) subdir('build-utils-meson/diagnostics') subdir('build-utils-meson/generate-header') -nix_sources = files( +nix_sources = [config_h] + files( 'add-to-store.cc', 'app.cc', + 'bin-dir.cc', 'build.cc', 'bundle.cc', 'cat.cc', diff --git a/src/nix/repl.cc b/src/nix/repl.cc index a2f3e033e72f..643f067fe0b9 100644 --- a/src/nix/repl.cc +++ b/src/nix/repl.cc @@ -1,12 +1,32 @@ #include "eval.hh" #include "eval-settings.hh" +#include "config-global.hh" #include "globals.hh" #include "command.hh" #include "installable-value.hh" #include "repl.hh" +#include "processes.hh" +#include "bin-dir.hh" namespace nix { +void runNix(Path program, const Strings & args, + const std::optional & input = {}) +{ + auto subprocessEnv = getEnv(); + subprocessEnv["NIX_CONFIG"] = globalConfig.toKeyValue(); + //isInteractive avoid grabling interactive commands + runProgram2(RunOptions { + .program = getNixBin(program).string(), + .args = args, + .environment = subprocessEnv, + .input = input, + .isInteractive = true, + }); + + return; +} + struct CmdRepl : RawInstallablesCommand { CmdRepl() { @@ -81,7 +101,8 @@ struct CmdRepl : RawInstallablesCommand lookupPath, openStore(), state, - getValues + getValues, + runNix ); repl->autoArgs = getAutoArgs(*repl->state); repl->initEnv(); diff --git a/src/nix/upgrade-nix.cc b/src/nix/upgrade-nix.cc index 9ca3f6087e07..13fb367e02ce 100644 --- a/src/nix/upgrade-nix.cc +++ b/src/nix/upgrade-nix.cc @@ -9,6 +9,7 @@ #include "names.hh" #include "progress-bar.hh" #include "executable-path.hh" +#include "bin-dir.hh" using namespace nix; @@ -93,7 +94,7 @@ struct CmdUpgradeNix : MixDryRun, StoreCommand { Activity act(*logger, lvlInfo, actUnknown, fmt("installing '%s' into profile '%s'...", store->printStorePath(storePath), profileDir)); - runProgram(settings.nixBinDir + "/nix-env", false, + runProgram(getNixBin("nix-env").string(), false, {"--profile", profileDir, "-i", store->printStorePath(storePath), "--no-sandbox"}); } @@ -103,7 +104,7 @@ struct CmdUpgradeNix : MixDryRun, StoreCommand /* Return the profile in which Nix is installed. */ Path getProfileDir(ref store) { - auto whereOpt = ExecutablePath::load().find(OS_STR("nix-env")); + auto whereOpt = ExecutablePath::load().findName(OS_STR("nix-env")); if (!whereOpt) throw Error("couldn't figure out how Nix is installed, so I can't upgrade it"); auto & where = *whereOpt; diff --git a/src/perl/lib/Nix/Config.pm.in b/src/perl/lib/Nix/Config.pm.in index 508a15e1598d..ad51cff3b28b 100644 --- a/src/perl/lib/Nix/Config.pm.in +++ b/src/perl/lib/Nix/Config.pm.in @@ -5,7 +5,6 @@ use Nix::Store; $version = "@PACKAGE_VERSION@"; -$binDir = Nix::Store::getBinDir; $storeDir = Nix::Store::getStoreDir; %config = (); diff --git a/src/perl/lib/Nix/Store.pm b/src/perl/lib/Nix/Store.pm index 16f2e17c81ad..f2ae7e88f81d 100644 --- a/src/perl/lib/Nix/Store.pm +++ b/src/perl/lib/Nix/Store.pm @@ -24,7 +24,7 @@ our @EXPORT = qw( hashPath hashFile hashString convertHash signString checkSignature - getBinDir getStoreDir + getStoreDir setVerbosity ); diff --git a/src/perl/lib/Nix/Store.xs b/src/perl/lib/Nix/Store.xs index f951437c8992..172c3500de05 100644 --- a/src/perl/lib/Nix/Store.xs +++ b/src/perl/lib/Nix/Store.xs @@ -424,11 +424,6 @@ StoreWrapper::addTempRoot(char * storePath) } -SV * getBinDir() - PPCODE: - XPUSHs(sv_2mortal(newSVpv(settings.nixBinDir.c_str(), 0))); - - SV * getStoreDir() PPCODE: XPUSHs(sv_2mortal(newSVpv(settings.nixStore.c_str(), 0)));