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Merge pull request #8699 from tweag/nix-c-bindings

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(Towards) stable C bindings for libutil, libexpr
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Robert Hensing 2024-04-04 17:50:52 +02:00 • committed by GitHub
commit 12ec3154b8
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47 changed files with 3624 additions and 20 deletions
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7
src/libstore/globals.cc
View file

@ -345,6 +345,12 @@ void initPlugins()
dlopen(file.c_str(), RTLD_LAZY | RTLD_LOCAL);
if (!handle)
throw Error("could not dynamically open plugin file '%s': %s", file, dlerror());
/* Older plugins use a statically initialized object to run their code.
Newer plugins can also export nix_plugin_entry() */
void (*nix_plugin_entry)() = (void (*)())dlsym(handle, "nix_plugin_entry");
if (nix_plugin_entry)
nix_plugin_entry();
}
}
@ -403,6 +409,7 @@ void assertLibStoreInitialized() {
}
void initLibStore() {
if (initLibStoreDone) return;
initLibUtil();

7
src/libstore/globals.hh
View file

@ -1157,9 +1157,10 @@ public:
this, {}, "plugin-files",
R"(
A list of plugin files to be loaded by Nix. Each of these files will
be dlopened by Nix, allowing them to affect execution through static
initialization. In particular, these plugins may construct static
instances of RegisterPrimOp to add new primops or constants to the
be dlopened by Nix. If they contain the symbol `nix_plugin_entry()`,
this symbol will be called. Alternatively, they can affect execution
through static initialization. In particular, these plugins may construct
static instances of RegisterPrimOp to add new primops or constants to the
expression language, RegisterStoreImplementation to add new store
implementations, RegisterCommand to add new subcommands to the `nix`
command, and RegisterSetting to add new nix config settings. See the