Move StorePathWithOutput utilities out of store class

These are by no means part of the notion of a store, but rather are
things that happen to use stores. (Or put another way, there's no way
we'd make them virtual methods any time soon.) It's better to move them
out of that too-big class then.

Also, this helps us remove StorePathWithOutputs from the Store interface
altogether next commit.

src/libexpr/get-drvs.cc

@@ -19,7 +19,7 @@ DrvInfo::DrvInfo(EvalState & state, const string & attrPath, Bindings * attrs)
 DrvInfo::DrvInfo(EvalState & state, ref<Store> store, const std::string & drvPathWithOutputs)
     : state(&state), attrs(nullptr), attrPath("")
 {
-    auto [drvPath, selectedOutputs] = store->parsePathWithOutputs(drvPathWithOutputs);
+    auto [drvPath, selectedOutputs] = parsePathWithOutputs(*store, drvPathWithOutputs);
 
     this->drvPath = store->printStorePath(drvPath);
 

src/libstore/daemon.cc

@@ -495,7 +495,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
     case wopBuildPaths: {
         std::vector<StorePathWithOutputs> drvs;
         for (auto & s : readStrings<Strings>(from))
-            drvs.push_back(store->parsePathWithOutputs(s));
+            drvs.push_back(parsePathWithOutputs(*store, s));
         BuildMode mode = bmNormal;
         if (GET_PROTOCOL_MINOR(clientVersion) >= 15) {
             mode = (BuildMode) readInt(from);
@@ -858,7 +858,7 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
     case wopQueryMissing: {
         std::vector<StorePathWithOutputs> targets;
         for (auto & s : readStrings<Strings>(from))
-            targets.push_back(store->parsePathWithOutputs(s));
+            targets.push_back(parsePathWithOutputs(*store, s));
         logger->startWork();
         StorePathSet willBuild, willSubstitute, unknown;
         uint64_t downloadSize, narSize;

src/libstore/path-with-outputs.cc

@@ -20,17 +20,17 @@ std::pair<std::string_view, StringSet> parsePathWithOutputs(std::string_view s)
 }
 
 
-StorePathWithOutputs Store::parsePathWithOutputs(const std::string & s)
+StorePathWithOutputs parsePathWithOutputs(const Store & store, std::string_view pathWithOutputs)
 {
-    auto [path, outputs] = nix::parsePathWithOutputs(s);
-    return {parseStorePath(path), std::move(outputs)};
+    auto [path, outputs] = parsePathWithOutputs(pathWithOutputs);
+    return StorePathWithOutputs { store.parseStorePath(path), std::move(outputs) };
 }
 
 
-StorePathWithOutputs Store::followLinksToStorePathWithOutputs(std::string_view path) const
+StorePathWithOutputs followLinksToStorePathWithOutputs(const Store & store, std::string_view pathWithOutputs)
 {
-    auto [path2, outputs] = nix::parsePathWithOutputs(path);
-    return StorePathWithOutputs { followLinksToStorePath(path2), std::move(outputs) };
+    auto [path, outputs] = parsePathWithOutputs(pathWithOutputs);
+    return StorePathWithOutputs { store.followLinksToStorePath(path), std::move(outputs) };
 }
 
 }

src/libstore/path-with-outputs.hh

@@ -14,4 +14,13 @@ struct StorePathWithOutputs
 
 std::pair<std::string_view, StringSet> parsePathWithOutputs(std::string_view s);
 
+class Store;
+
+/* Split a string specifying a derivation and a set of outputs
+   (/nix/store/hash-foo!out1,out2,...) into the derivation path
+   and the outputs. */
+StorePathWithOutputs parsePathWithOutputs(const Store & store, std::string_view pathWithOutputs);
+
+StorePathWithOutputs followLinksToStorePathWithOutputs(const Store & store, std::string_view pathWithOutputs);
+
 }

src/libstore/store-api.hh

@@ -262,11 +262,6 @@ public:
 
     PathSet printStorePathSet(const StorePathSet & path) const;
 
-    /* Split a string specifying a derivation and a set of outputs
-       (/nix/store/hash-foo!out1,out2,...) into the derivation path
-       and the outputs. */
-    StorePathWithOutputs parsePathWithOutputs(const string & s);
-
     /* Display a set of paths in human-readable form (i.e., between quotes
        and separated by commas). */
     std::string showPaths(const StorePathSet & paths);
@@ -290,8 +285,6 @@ public:
        result. */
     StorePath followLinksToStorePath(std::string_view path) const;
 
-    StorePathWithOutputs followLinksToStorePathWithOutputs(std::string_view path) const;
-
     /* Constructs a unique store path name. */
     StorePath makeStorePath(std::string_view type,
         std::string_view hash, std::string_view name) const;

src/nix-store/nix-store.cc

@@ -128,7 +128,7 @@ static void opRealise(Strings opFlags, Strings opArgs)
 
     std::vector<StorePathWithOutputs> paths;
     for (auto & i : opArgs)
-        paths.push_back(store->followLinksToStorePathWithOutputs(i));
+        paths.push_back(followLinksToStorePathWithOutputs(*store, i));
 
     uint64_t downloadSize, narSize;
     StorePathSet willBuild, willSubstitute, unknown;
@@ -873,7 +873,7 @@ static void opServe(Strings opFlags, Strings opArgs)
 
                 std::vector<StorePathWithOutputs> paths;
                 for (auto & s : readStrings<Strings>(in))
-                    paths.push_back(store->parsePathWithOutputs(s));
+                    paths.push_back(parsePathWithOutputs(*store, s));
 
                 getBuildSettings();