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#include "shared.hh"
#include "local-store.hh"
#include "util.hh"
#include "serialise.hh"
#include "worker-protocol.hh"
#include "archive.hh"
#include <iostream>
using namespace nix;
static Path readStorePath(Source & from)
{
Path path = readString(from);
assertStorePath(path);
return path;
}
static PathSet readStorePaths(Source & from)
{
PathSet paths = readStringSet(from);
for (PathSet::iterator i = paths.begin(); i != paths.end(); ++i)
assertStorePath(*i);
return paths;
}
static Sink * _to; /* !!! should make writeToStderr an object */
bool canSendStderr;
static void tunnelStderr(const unsigned char * buf, size_t count)
{
writeFull(STDERR_FILENO, buf, count);
if (canSendStderr) {
try {
writeInt(STDERR_NEXT, *_to);
writeString(string((char *) buf, count), *_to);
} catch (...) {
/* Write failed; that means that the other side is
gone. */
canSendStderr = false;
throw;
}
}
}
/* startWork() means that we're starting an operation for which we
want to send out stderr to the client. */
static void startWork()
{
canSendStderr = true;
}
/* stopWork() means that we're done; stop sending stderr to the
client. */
static void stopWork()
{
canSendStderr = false;
writeInt(STDERR_LAST, *_to);
}
static void performOp(Source & from, Sink & to, unsigned int op)
{
switch (op) {
#if 0
case wopQuit: {
/* Close the database. */
store.reset((StoreAPI *) 0);
writeInt(1, to);
break;
}
#endif
case wopIsValidPath: {
Path path = readStorePath(from);
writeInt(store->isValidPath(path), to);
break;
}
case wopHasSubstitutes: {
Path path = readStorePath(from);
writeInt(store->hasSubstitutes(path), to);
break;
}
case wopQueryPathHash: {
Path path = readStorePath(from);
writeString(printHash(store->queryPathHash(path)), to);
break;
}
case wopQueryReferences:
case wopQueryReferrers: {
Path path = readStorePath(from);
PathSet paths;
if (op == wopQueryReferences)
store->queryReferences(path, paths);
else
store->queryReferrers(path, paths);
writeStringSet(paths, to);
break;
}
case wopAddToStore: {
/* !!! uberquick hack */
string baseName = readString(from);
bool fixed = readInt(from) == 1;
bool recursive = readInt(from) == 1;
string hashAlgo = readString(from);
Path tmp = createTempDir();
Path tmp2 = tmp + "/" + baseName;
restorePath(tmp2, from);
writeString(store->addToStore(tmp2, fixed, recursive, hashAlgo), to);
deletePath(tmp);
break;
}
case wopAddTextToStore: {
string suffix = readString(from);
string s = readString(from);
PathSet refs = readStorePaths(from);
writeString(store->addTextToStore(suffix, s, refs), to);
break;
}
case wopBuildDerivations: {
PathSet drvs = readStorePaths(from);
startWork();
store->buildDerivations(drvs);
stopWork();
writeInt(1, to);
break;
}
case wopEnsurePath: {
Path path = readStorePath(from);
store->ensurePath(path);
writeInt(1, to);
break;
}
case wopAddTempRoot: {
Path path = readStorePath(from);
store->addTempRoot(path);
writeInt(1, to);
break;
}
case wopSyncWithGC: {
store->syncWithGC();
writeInt(1, to);
break;
}
default:
throw Error(format("invalid operation %1%") % op);
}
}
static void processConnection(Source & from, Sink & to)
{
store = boost::shared_ptr<StoreAPI>(new LocalStore(true));
unsigned int magic = readInt(from);
if (magic != WORKER_MAGIC_1) throw Error("protocol mismatch");
writeInt(WORKER_MAGIC_2, to);
debug("greeting exchanged");
_to = &to;
canSendStderr = false;
writeToStderr = tunnelStderr;
bool quit = false;
unsigned int opCount = 0;
do {
WorkerOp op = (WorkerOp) readInt(from);
opCount++;
try {
performOp(from, to, op);
} catch (Error & e) {
writeInt(STDERR_ERROR, *_to);
writeString(e.msg(), to);
}
} while (!quit);
printMsg(lvlError, format("%1% worker operations") % opCount);
}
void run(Strings args)
{
bool slave = false;
bool daemon = false;
for (Strings::iterator i = args.begin(); i != args.end(); ) {
string arg = *i++;
if (arg == "--slave") slave = true;
if (arg == "--daemon") daemon = true;
}
if (slave) {
FdSource source(STDIN_FILENO);
FdSink sink(STDOUT_FILENO);
/* This prevents us from receiving signals from the terminal
when we're running in setuid mode. */
if (setsid() == -1)
throw SysError(format("creating a new session"));
processConnection(source, sink);
}
else if (daemon)
throw Error("daemon mode not implemented");
else
throw Error("must be run in either --slave or --daemon mode");
}
#include "help.txt.hh"
void printHelp()
{
std::cout << string((char *) helpText, sizeof helpText);
}
string programId = "nix-worker";
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