Add the nix-store --serve command
This is essentially the substituter API operating on the local store, which will be used by the ssh substituter. It runs in a loop rather than just taking one command so that in the future nix will be able to keep one connection open for multiple instances of the substituter. Signed-off-by: Shea Levy <shea@shealevy.com>
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@ -258,6 +258,37 @@ string StoreAPI::makeValidityRegistration(const PathSet & paths,
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}
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void StoreAPI::serve(Source & in, Sink & out, bool sign)
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{
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for (string cmd = readString(in); !cmd.empty(); cmd = readString(in)) {
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if (cmd == "query") {
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for (cmd = readString(in); !cmd.empty(); cmd = readString(in)) {
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PathSet paths = readStrings<PathSet>(in);
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if (cmd == "have") {
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writeStrings(queryValidPaths(paths), out);
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} else if (cmd == "info") {
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// !!! Maybe we want a queryPathInfos?
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foreach (PathSet::iterator, i, paths) {
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ValidPathInfo info = queryPathInfo(*i);
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writeString(info.path, out);
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writeString(info.deriver, out);
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writeStrings(info.references, out);
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// !!! Maybe we want compression?
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writeLongLong(info.narSize, out); // downloadSize
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writeLongLong(info.narSize, out);
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}
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writeString("", out);
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} else
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throw Error(format("Unknown serve query `%1%'") % cmd);
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}
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} else if (cmd == "substitute")
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exportPath(readString(in), sign, out);
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else
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throw Error(format("Unknown serve command `%1%'") % cmd);
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}
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}
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ValidPathInfo decodeValidPathInfo(std::istream & str, bool hashGiven)
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{
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ValidPathInfo info;
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@ -248,6 +248,10 @@ public:
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`nix-store --register-validity'. */
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string makeValidityRegistration(const PathSet & paths,
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bool showDerivers, bool showHash);
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/* Serve the store for ssh substituters by taking commands
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* from in and printing results to out */
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void serve(Source & in, Sink & out, bool sign);
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};
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@ -834,6 +834,24 @@ static void opClearFailedPaths(Strings opFlags, Strings opArgs)
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}
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// Serve the nix store in a way usable by a restricted ssh user
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static void opServe(Strings opFlags, Strings opArgs)
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{
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if (!opArgs.empty())
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throw UsageError("no arguments expected");
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// Could eventually take a username argument?
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bool sign;
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foreach (Strings::iterator, i, opFlags)
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if (*i == "--sign") sign = true;
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else throw UsageError(format("unknown flag `%1%'") % *i);
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FdSource in(STDIN_FILENO);
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FdSink out(STDOUT_FILENO);
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store->serve(in, out, sign);
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}
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/* Scan the arguments; find the operation, set global flags, put all
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other flags in a list, and put all other arguments in another
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list. */
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@ -904,6 +922,8 @@ void run(Strings args)
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indirectRoot = true;
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else if (arg == "--no-output")
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noOutput = true;
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else if (arg == "--serve")
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op = opServe;
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else if (arg[0] == '-') {
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opFlags.push_back(arg);
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if (arg == "--max-freed" || arg == "--max-links" || arg == "--max-atime") { /* !!! hack */
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