Build the local store on Windows

Fixes #10558

Co-Authored-By: Eugene Butler <eugene@eugene4.com>
Co-authored-by: Eelco Dolstra <edolstra@gmail.com>

src/libstore/ca-specific-schema.sql

@@ -0,0 +1,41 @@
+-- Extension of the sql schema for content-addressed derivations.
+-- Won't be loaded unless the experimental feature `ca-derivations`
+-- is enabled
+
+create table if not exists Realisations (
+    id integer primary key autoincrement not null,
+    drvPath text not null,
+    outputName text not null, -- symbolic output id, usually "out"
+    outputPath integer not null,
+    signatures text, -- space-separated list
+    foreign key (outputPath) references ValidPaths(id) on delete cascade
+);
+
+create index if not exists IndexRealisations on Realisations(drvPath, outputName);
+
+-- We can end-up in a weird edge-case where a path depends on itself because
+-- it’s an output of a CA derivation, that happens to be the same as one of its
+-- dependencies.
+-- In that case we have a dependency loop (path -> realisation1 -> realisation2
+-- -> path) that we need to break by removing the dependencies between the
+-- realisations
+create trigger if not exists DeleteSelfRefsViaRealisations before delete on ValidPaths
+  begin
+    delete from RealisationsRefs where realisationReference in (
+      select id from Realisations where outputPath = old.id
+    );
+  end;
+
+create table if not exists RealisationsRefs (
+    referrer integer not null,
+    realisationReference integer,
+    foreign key (referrer) references Realisations(id) on delete cascade,
+    foreign key (realisationReference) references Realisations(id) on delete restrict
+);
+-- used by deletion trigger
+create index if not exists IndexRealisationsRefsRealisationReference on RealisationsRefs(realisationReference);
+
+-- used by QueryRealisationReferences
+create index if not exists IndexRealisationsRefs on RealisationsRefs(referrer);
+-- used by cascade deletion when ValidPaths is deleted
+create index if not exists IndexRealisationsRefsOnOutputPath on Realisations(outputPath);