forked from lix-project/lix
85c8be6286
This was useful for an experiment with building Nix as a single compilation unit. It's not very useful otherwise but also doesn't hurt...
135 lines
4.1 KiB
C++
135 lines
4.1 KiB
C++
#include <sstream>
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#include "command.hh"
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#include "logging.hh"
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#include "serve-protocol.hh"
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#include "shared.hh"
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#include "store-api.hh"
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#include "util.hh"
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#include "worker-protocol.hh"
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using namespace nix;
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namespace {
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std::string formatProtocol(unsigned int proto)
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{
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if (proto) {
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auto major = GET_PROTOCOL_MAJOR(proto) >> 8;
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auto minor = GET_PROTOCOL_MINOR(proto);
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return (format("%1%.%2%") % major % minor).str();
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}
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return "unknown";
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}
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bool checkPass(const std::string & msg) {
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logger->log(ANSI_GREEN "[PASS] " ANSI_NORMAL + msg);
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return true;
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}
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bool checkFail(const std::string & msg) {
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logger->log(ANSI_RED "[FAIL] " ANSI_NORMAL + msg);
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return false;
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}
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}
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struct CmdDoctor : StoreCommand
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{
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bool success = true;
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std::string description() override
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{
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return "check your system for potential problems and print a PASS or FAIL for each check";
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}
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Category category() override { return catNixInstallation; }
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void run(ref<Store> store) override
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{
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logger->log("Running checks against store uri: " + store->getUri());
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if (store.dynamic_pointer_cast<LocalFSStore>()) {
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success &= checkNixInPath();
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success &= checkProfileRoots(store);
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}
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success &= checkStoreProtocol(store->getProtocol());
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if (!success)
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throw Exit(2);
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}
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bool checkNixInPath()
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{
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PathSet dirs;
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for (auto & dir : tokenizeString<Strings>(getEnv("PATH").value_or(""), ":"))
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if (pathExists(dir + "/nix-env"))
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dirs.insert(dirOf(canonPath(dir + "/nix-env", true)));
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if (dirs.size() != 1) {
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std::stringstream ss;
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ss << "Multiple versions of nix found in PATH:\n";
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for (auto & dir : dirs)
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ss << " " << dir << "\n";
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return checkFail(ss.str());
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}
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return checkPass("PATH contains only one nix version.");
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}
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bool checkProfileRoots(ref<Store> store)
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{
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PathSet dirs;
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for (auto & dir : tokenizeString<Strings>(getEnv("PATH").value_or(""), ":")) {
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Path profileDir = dirOf(dir);
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try {
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Path userEnv = canonPath(profileDir, true);
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if (store->isStorePath(userEnv) && hasSuffix(userEnv, "user-environment")) {
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while (profileDir.find("/profiles/") == std::string::npos && isLink(profileDir))
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profileDir = absPath(readLink(profileDir), dirOf(profileDir));
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if (profileDir.find("/profiles/") == std::string::npos)
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dirs.insert(dir);
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}
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} catch (SysError &) {}
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}
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if (!dirs.empty()) {
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std::stringstream ss;
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ss << "Found profiles outside of " << settings.nixStateDir << "/profiles.\n"
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<< "The generation this profile points to might not have a gcroot and could be\n"
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<< "garbage collected, resulting in broken symlinks.\n\n";
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for (auto & dir : dirs)
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ss << " " << dir << "\n";
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ss << "\n";
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return checkFail(ss.str());
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}
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return checkPass("All profiles are gcroots.");
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}
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bool checkStoreProtocol(unsigned int storeProto)
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{
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unsigned int clientProto = GET_PROTOCOL_MAJOR(SERVE_PROTOCOL_VERSION) == GET_PROTOCOL_MAJOR(storeProto)
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? SERVE_PROTOCOL_VERSION
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: PROTOCOL_VERSION;
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if (clientProto != storeProto) {
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std::stringstream ss;
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ss << "Warning: protocol version of this client does not match the store.\n"
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<< "While this is not necessarily a problem it's recommended to keep the client in\n"
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<< "sync with the daemon.\n\n"
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<< "Client protocol: " << formatProtocol(clientProto) << "\n"
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<< "Store protocol: " << formatProtocol(storeProto) << "\n\n";
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return checkFail(ss.str());
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}
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return checkPass("Client protocol matches store protocol.");
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}
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};
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static auto rCmdDoctor = registerCommand<CmdDoctor>("doctor");
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