wroclaw-git-backups/nix
1
0
Fork 0
mirror of https://github.com/NixOS/nix synced 2025-07-04 15:31:47 +02:00
Code Activity

Move plugins infra to libnixmain

Browse source 
They are not actually part of the store layer, but instead part of the
Nix executable infra (libraries don't need plugins, executables do).

This is part of a larger project of moving all of our legacy settings
infra to libmain, and having the underlying libraries just have plain
configuration structs detached from any settings infra / UI layer.

Progress on #5638
This commit is contained in:
John Ericson 2024-07-02 15:15:17 -04:00
parent 1a273a623f
commit 0feeab755a
18 changed files with 361 additions and 126 deletions
Download patch file Download diff file Expand all files Collapse all files

55
src/libstore/globals.cc
View file

@ -15,7 +15,6 @@
#include <nlohmann/json.hpp>
#ifndef _WIN32
# include <dlfcn.h>
# include <sys/utsname.h>
#endif
@ -335,60 +334,6 @@ unsigned int MaxBuildJobsSetting::parse(const std::string & str) const
}
Paths PluginFilesSetting::parse(const std::string & str) const
{
if (pluginsLoaded)
throw UsageError("plugin-files set after plugins were loaded, you may need to move the flag before the subcommand");
return BaseSetting<Paths>::parse(str);
}
void initPlugins()
{
assert(!settings.pluginFiles.pluginsLoaded);
for (const auto & pluginFile : settings.pluginFiles.get()) {
std::vector<std::filesystem::path> pluginFiles;
try {
auto ents = std::filesystem::directory_iterator{pluginFile};
for (const auto & ent : ents) {
checkInterrupt();
pluginFiles.emplace_back(ent.path());
}
} catch (std::filesystem::filesystem_error & e) {
if (e.code() != std::errc::not_a_directory)
throw;
pluginFiles.emplace_back(pluginFile);
}
for (const auto & file : pluginFiles) {
checkInterrupt();
/* handle is purposefully leaked as there may be state in the
DSO needed by the action of the plugin. */
#ifndef _WIN32 // TODO implement via DLL loading on Windows
void *handle =
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();
#else
throw Error("could not dynamically open plugin file '%s'", file);
#endif
}
}
/* Since plugins can add settings, try to re-apply previously
unknown settings. */
globalConfig.reapplyUnknownSettings();
globalConfig.warnUnknownSettings();
/* Tell the user if they try to set plugin-files after we've already loaded */
settings.pluginFiles.pluginsLoaded = true;
}
static void preloadNSS()
{
/* builtin:fetchurl can trigger a DNS lookup, which with glibc can trigger a dynamic library load of