Flip dependency so store-api.hh includes derivations.hh

I think it makes more sense to define the data model (derivations),
before the operations (store api).

src/libexpr/get-drvs.cc

@@ -1,7 +1,7 @@
 #include "get-drvs.hh"
 #include "util.hh"
 #include "eval-inline.hh"
-#include "derivations.hh"
+#include "store-api.hh"
 
 #include <cstring>
 #include <regex>

src/libexpr/primops/context.cc

@@ -1,6 +1,6 @@
 #include "primops.hh"
 #include "eval-inline.hh"
-#include "derivations.hh"
+#include "store-api.hh"
 
 namespace nix {
 

src/libstore/derivations.hh

@@ -1,8 +1,8 @@
 #pragma once
 
+#include "path.hh"
 #include "types.hh"
 #include "hash.hh"
-#include "store-api.hh"
 
 #include <map>
 
@@ -76,6 +76,7 @@ struct Derivation : BasicDerivation
 
 class Store;
 
+enum RepairFlag : bool { NoRepair = false, Repair = true };
 
 /* Write a derivation to the Nix store, and return its path. */
 StorePath writeDerivation(ref<Store> store,

src/libstore/parsed-derivations.hh

@@ -1,4 +1,4 @@
-#include "derivations.hh"
+#include "store-api.hh"
 
 #include <nlohmann/json_fwd.hpp>
 

src/libstore/store-api.hh

@@ -8,6 +8,7 @@
 #include "sync.hh"
 #include "globals.hh"
 #include "config.hh"
+#include "derivations.hh"
 
 #include <atomic>
 #include <limits>
@@ -30,15 +31,12 @@ MakeError(SubstituteGone, Error);
 MakeError(SubstituterDisabled, Error);
 
 
-struct BasicDerivation;
-struct Derivation;
 class FSAccessor;
 class NarInfoDiskCache;
 class Store;
 class JSONPlaceholder;
 
 
-enum RepairFlag : bool { NoRepair = false, Repair = true };
 enum CheckSigsFlag : bool { NoCheckSigs = false, CheckSigs = true };
 enum SubstituteFlag : bool { NoSubstitute = false, Substitute = true };
 enum AllowInvalidFlag : bool { DisallowInvalid = false, AllowInvalid = true };