forked from lix-project/lix
* Open the connection to the daemon lazily (on demand) so that
read-only operations (like nix-env -qa) work properly when the daemon isn't running.
This commit is contained in:
parent
a0766eca27
commit
07cdfb09fb
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@ -37,6 +37,15 @@ PathSet readStorePaths(Source & from)
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RemoteStore::RemoteStore()
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{
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initialised = false;
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}
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void RemoteStore::openConnection()
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{
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if (initialised) return;
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initialised = true;
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string remoteMode = getEnv("NIX_REMOTE");
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if (remoteMode == "slave")
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@ -64,8 +73,8 @@ RemoteStore::RemoteStore()
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throw Error("Nix daemon protocol version not supported");
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writeInt(PROTOCOL_VERSION, to);
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processStderr();
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} catch (Error & e) {
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}
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catch (Error & e) {
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throw Error(format("cannot start worker (%1%)")
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% e.msg());
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}
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@ -194,6 +203,7 @@ void RemoteStore::setOptions()
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bool RemoteStore::isValidPath(const Path & path)
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{
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openConnection();
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writeInt(wopIsValidPath, to);
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writeString(path, to);
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processStderr();
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@ -204,12 +214,14 @@ bool RemoteStore::isValidPath(const Path & path)
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PathSet RemoteStore::queryValidPaths()
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{
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openConnection();
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throw Error("not implemented");
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}
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bool RemoteStore::hasSubstitutes(const Path & path)
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{
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openConnection();
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writeInt(wopHasSubstitutes, to);
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writeString(path, to);
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processStderr();
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@ -221,6 +233,7 @@ bool RemoteStore::hasSubstitutes(const Path & path)
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bool RemoteStore::querySubstitutablePathInfo(const Path & path,
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SubstitutablePathInfo & info)
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{
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openConnection();
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if (GET_PROTOCOL_MINOR(daemonVersion) < 3) return false;
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writeInt(wopQuerySubstitutablePathInfo, to);
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writeString(path, to);
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@ -237,6 +250,7 @@ bool RemoteStore::querySubstitutablePathInfo(const Path & path,
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Hash RemoteStore::queryPathHash(const Path & path)
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{
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openConnection();
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writeInt(wopQueryPathHash, to);
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writeString(path, to);
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processStderr();
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@ -248,6 +262,7 @@ Hash RemoteStore::queryPathHash(const Path & path)
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void RemoteStore::queryReferences(const Path & path,
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PathSet & references)
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{
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openConnection();
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writeInt(wopQueryReferences, to);
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writeString(path, to);
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processStderr();
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@ -259,6 +274,7 @@ void RemoteStore::queryReferences(const Path & path,
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void RemoteStore::queryReferrers(const Path & path,
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PathSet & referrers)
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{
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openConnection();
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writeInt(wopQueryReferrers, to);
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writeString(path, to);
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processStderr();
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@ -269,6 +285,7 @@ void RemoteStore::queryReferrers(const Path & path,
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Path RemoteStore::queryDeriver(const Path & path)
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{
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openConnection();
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writeInt(wopQueryDeriver, to);
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writeString(path, to);
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processStderr();
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@ -281,6 +298,8 @@ Path RemoteStore::queryDeriver(const Path & path)
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Path RemoteStore::addToStore(const Path & _srcPath,
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bool recursive, HashType hashAlgo, PathFilter & filter)
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{
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openConnection();
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Path srcPath(absPath(_srcPath));
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writeInt(wopAddToStore, to);
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@ -298,6 +317,7 @@ Path RemoteStore::addToStore(const Path & _srcPath,
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Path RemoteStore::addTextToStore(const string & name, const string & s,
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const PathSet & references)
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{
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openConnection();
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writeInt(wopAddTextToStore, to);
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writeString(name, to);
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writeString(s, to);
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@ -311,6 +331,7 @@ Path RemoteStore::addTextToStore(const string & name, const string & s,
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void RemoteStore::exportPath(const Path & path, bool sign,
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Sink & sink)
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{
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openConnection();
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writeInt(wopExportPath, to);
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writeString(path, to);
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writeInt(sign ? 1 : 0, to);
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@ -321,10 +342,10 @@ void RemoteStore::exportPath(const Path & path, bool sign,
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Path RemoteStore::importPath(bool requireSignature, Source & source)
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{
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openConnection();
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writeInt(wopImportPath, to);
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/* We ignore requireSignature, since the worker forces it to true
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anyway. */
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anyway. */
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processStderr(0, &source);
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return readStorePath(from);
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}
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@ -332,6 +353,7 @@ Path RemoteStore::importPath(bool requireSignature, Source & source)
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void RemoteStore::buildDerivations(const PathSet & drvPaths)
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{
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openConnection();
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writeInt(wopBuildDerivations, to);
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writeStringSet(drvPaths, to);
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processStderr();
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@ -341,6 +363,7 @@ void RemoteStore::buildDerivations(const PathSet & drvPaths)
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void RemoteStore::ensurePath(const Path & path)
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{
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openConnection();
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writeInt(wopEnsurePath, to);
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writeString(path, to);
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processStderr();
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@ -350,6 +373,7 @@ void RemoteStore::ensurePath(const Path & path)
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void RemoteStore::addTempRoot(const Path & path)
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{
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openConnection();
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writeInt(wopAddTempRoot, to);
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writeString(path, to);
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processStderr();
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@ -359,6 +383,7 @@ void RemoteStore::addTempRoot(const Path & path)
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void RemoteStore::addIndirectRoot(const Path & path)
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{
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openConnection();
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writeInt(wopAddIndirectRoot, to);
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writeString(path, to);
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processStderr();
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@ -368,6 +393,7 @@ void RemoteStore::addIndirectRoot(const Path & path)
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void RemoteStore::syncWithGC()
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{
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openConnection();
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writeInt(wopSyncWithGC, to);
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processStderr();
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readInt(from);
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@ -376,6 +402,7 @@ void RemoteStore::syncWithGC()
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Roots RemoteStore::findRoots()
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{
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openConnection();
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writeInt(wopFindRoots, to);
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processStderr();
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unsigned int count = readInt(from);
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@ -391,6 +418,8 @@ Roots RemoteStore::findRoots()
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void RemoteStore::collectGarbage(const GCOptions & options, GCResults & results)
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{
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openConnection();
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writeInt(wopCollectGarbage, to);
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writeInt(options.action, to);
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writeStringSet(options.pathsToDelete, to);
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@ -74,6 +74,9 @@ private:
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FdSource from;
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Pid child;
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unsigned int daemonVersion;
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bool initialised;
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void openConnection();
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void processStderr(Sink * sink = 0, Source * source = 0);
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@ -35,7 +35,7 @@ struct FdSink : Sink
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FdSink()
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{
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fd = 0;
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fd = -1;
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}
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FdSink(int fd)
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@ -54,7 +54,7 @@ struct FdSource : Source
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FdSource()
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{
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fd = 0;
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fd = -1;
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}
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FdSource(int fd)
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