diff options
| -rw-r--r-- | src/libcmd/command.hh | 5 | ||||
| -rw-r--r-- | src/libcmd/installables.cc | 23 | ||||
| -rw-r--r-- | src/nix/eval.cc | 2 |
3 files changed, 24 insertions, 6 deletions
diff --git a/src/libcmd/command.hh b/src/libcmd/command.hh index 0f6125f11..15bc13c6e 100644 --- a/src/libcmd/command.hh +++ b/src/libcmd/command.hh @@ -85,11 +85,12 @@ struct SourceExprCommand : virtual Args, MixFlakeOptions { std::optional<Path> file; std::optional<std::string> expr; + bool readOnlyMode = false; // FIXME: move this; not all commands (e.g. 'nix run') use it. OperateOn operateOn = OperateOn::Output; - SourceExprCommand(); + SourceExprCommand(bool supportReadOnlyMode = false); std::vector<std::shared_ptr<Installable>> parseInstallables( ref<Store> store, std::vector<std::string> ss); @@ -128,7 +129,7 @@ struct InstallableCommand : virtual Args, SourceExprCommand { std::shared_ptr<Installable> installable; - InstallableCommand(); + InstallableCommand(bool supportReadOnlyMode = false); void prepare() override; diff --git a/src/libcmd/installables.cc b/src/libcmd/installables.cc index 955bbe6fb..4e7262432 100644 --- a/src/libcmd/installables.cc +++ b/src/libcmd/installables.cc @@ -1,3 +1,4 @@ +#include "globals.hh" #include "installables.hh" #include "command.hh" #include "attr-path.hh" @@ -129,7 +130,7 @@ MixFlakeOptions::MixFlakeOptions() }); } -SourceExprCommand::SourceExprCommand() +SourceExprCommand::SourceExprCommand(bool supportReadOnlyMode) { addFlag({ .longName = "file", @@ -157,6 +158,17 @@ SourceExprCommand::SourceExprCommand() .category = installablesCategory, .handler = {&operateOn, OperateOn::Derivation}, }); + + if (supportReadOnlyMode) { + addFlag({ + .longName = "read-only", + .description = + "Do not instantiate each evaluated derivation. " + "This improves performance, but can cause errors when accessing " + "store paths of derivations during evaluation.", + .handler = {&readOnlyMode, true}, + }); + } } Strings SourceExprCommand::getDefaultFlakeAttrPaths() @@ -687,6 +699,10 @@ std::vector<std::shared_ptr<Installable>> SourceExprCommand::parseInstallables( { std::vector<std::shared_ptr<Installable>> result; + if (readOnlyMode) { + settings.readOnlyMode = true; + } + if (file || expr) { if (file && expr) throw UsageError("'--file' and '--expr' are exclusive"); @@ -954,7 +970,7 @@ InstallablesCommand::InstallablesCommand() void InstallablesCommand::prepare() { if (_installables.empty() && useDefaultInstallables()) - // FIXME: commands like "nix install" should not have a + // FIXME: commands like "nix profile install" should not have a // default, probably. _installables.push_back("."); installables = parseInstallables(getStore(), _installables); @@ -970,7 +986,8 @@ std::optional<FlakeRef> InstallablesCommand::getFlakeRefForCompletion() return parseFlakeRef(_installables.front(), absPath(".")); } -InstallableCommand::InstallableCommand() +InstallableCommand::InstallableCommand(bool supportReadOnlyMode) + : SourceExprCommand(supportReadOnlyMode) { expectArgs({ .label = "installable", diff --git a/src/nix/eval.cc b/src/nix/eval.cc index 8cd04d5fe..733b93661 100644 --- a/src/nix/eval.cc +++ b/src/nix/eval.cc @@ -16,7 +16,7 @@ struct CmdEval : MixJSON, InstallableCommand std::optional<std::string> apply; std::optional<Path> writeTo; - CmdEval() + CmdEval() : InstallableCommand(true /* supportReadOnlyMode */) { addFlag({ .longName = "raw", |