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#include "store-api.hh"
#include "profiles.hh"
#include "shared.hh"
#include "globals.hh"
#include <iostream>
#include <cerrno>
using namespace nix;
std::string deleteOlderThan;
bool dryRun = false;
/* If `-d' was specified, remove all old generations of all profiles.
* Of course, this makes rollbacks to before this point in time
* impossible. */
void removeOldGenerations(std::string dir)
{
if (access(dir.c_str(), R_OK) != 0) return;
bool canWrite = access(dir.c_str(), W_OK) == 0;
for (auto & i : readDirectory(dir)) {
checkInterrupt();
auto path = dir + "/" + i.name;
auto type = i.type == DT_UNKNOWN ? getFileType(path) : i.type;
if (type == DT_LNK && canWrite) {
std::string link;
try {
link = readLink(path);
} catch (SysError & e) {
if (e.errNo == ENOENT) continue;
}
if (link.find("link") != string::npos) {
printMsg(lvlInfo, format("removing old generations of profile %1%") % path);
if (deleteOlderThan != "")
deleteGenerationsOlderThan(path, deleteOlderThan, dryRun);
else
deleteOldGenerations(path, dryRun);
}
} else if (type == DT_DIR) {
removeOldGenerations(path);
}
}
}
int main(int argc, char * * argv)
{
bool removeOld = false;
return handleExceptions(argv[0], [&]() {
initNix();
GCOptions options;
parseCmdLine(argc, argv, [&](Strings::iterator & arg, const Strings::iterator & end) {
if (*arg == "--help")
showManPage("nix-collect-garbage");
else if (*arg == "--version")
printVersion("nix-collect-garbage");
else if (*arg == "--delete-old" || *arg == "-d") removeOld = true;
else if (*arg == "--delete-older-than") {
removeOld = true;
deleteOlderThan = getArg(*arg, arg, end);
}
else if (*arg == "--dry-run") dryRun = true;
else if (*arg == "--max-freed") {
long long maxFreed = getIntArg<long long>(*arg, arg, end, true);
options.maxFreed = maxFreed >= 0 ? maxFreed : 0;
}
else
return false;
return true;
});
auto profilesDir = settings.nixStateDir + "/profiles";
if (removeOld) removeOldGenerations(profilesDir);
// Run the actual garbage collector.
if (!dryRun) {
auto store = openStore();
options.action = GCOptions::gcDeleteDead;
GCResults results;
PrintFreed freed(true, results);
store->collectGarbage(options, results);
}
});
}
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