Jade Lovelace
adf45deeca
Plugins are already allowed to fail to load, let's be even more tolerant of them failing to load by ignoring inaccessible ones with a warning. This change also significantly reworks the docs for plugins. This is a tiny extremely partial backport of the C API at https://github.com/NixOS/nix/pull/8699. Fixes: https://git.lix.systems/lix-project/lix/issues/740 CC: https://git.lix.systems/lix-project/lix/issues/359 Change-Id: If4ee20c3daaf26c8184a415eef3e20ca5b5e7aef
49 lines
903 B
C++
49 lines
903 B
C++
#include "lix/libutil/config.hh"
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#include "lix/libexpr/primops.hh"
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#include <stdlib.h>
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using namespace nix;
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#ifdef MISSING_REFERENCE
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extern void meow();
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#else
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#define meow() {}
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#endif
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struct MySettings : Config
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{
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Setting<bool> settingSet{this, false, "setting-set",
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"Whether the plugin-defined setting was set"};
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};
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bool entryCalled = false;
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MySettings mySettings;
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static GlobalConfig::Register rs(&mySettings);
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[[gnu::used, gnu::unused, gnu::retain]]
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static void maybeRequireMeowForDlopen() {
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meow();
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}
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static void prim_anotherNull (EvalState & state, const PosIdx pos, Value ** args, Value & v)
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{
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assert(entryCalled);
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if (mySettings.settingSet)
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v.mkNull();
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else
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v.mkBool(false);
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}
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static RegisterPrimOp rp({
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.name = "anotherNull",
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.arity = 0,
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.fun = prim_anotherNull,
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});
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extern "C" void nix_plugin_entry()
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{
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entryCalled = true;
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}
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