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