nix: no SUPERUSER for connection role

Change :USER to :PGUSER in SQL scripts

nix/tools/withTools.nix

@@ -15,11 +15,14 @@
 let
   withTmpDb =
     { name, postgresql }:
-    let commandName = "postgrest-with-${name}"; in
+    let
+      commandName = "postgrest-with-${name}";
+      superuserRole = "postgres";
+    in
     checkedShellScript
       {
         name = commandName;
-        docs = "Run the given command in a temporary database with ${name}";
+        docs = "Run the given command in a temporary database with ${name}. If you wish to mutate the database, login with the '${superuserRole}' role.";
         args =
           [
             "ARG_OPTIONAL_SINGLE([fixtures], [f], [SQL file to load fixtures from], [test/spec/fixtures/load.sql])"
@@ -66,7 +69,8 @@ let
         log "Initializing database cluster..."
         # We try to make the database cluster as independent as possible from the host
         # by specifying the timezone, locale and encoding.
-        PGTZ=UTC initdb --no-locale --encoding=UTF8 --nosync -U "$PGUSER" --auth=trust \
+        # initdb -U creates a superuser(man initdb)
+        PGTZ=UTC initdb --no-locale --encoding=UTF8 --nosync -U "${superuserRole}" --auth=trust \
           >> "$setuplog"
 
         log "Starting the database cluster..."
@@ -82,8 +86,11 @@ let
         }
         trap stop EXIT
 
-        log "Loading fixtures..."
-        psql -v ON_ERROR_STOP=1 -f "$_arg_fixtures" >> "$setuplog"
+        log "Creating a minimally privileged $PGUSER connection role..."
+        createuser "$PGUSER" -U "${superuserRole}" --host="$tmpdir/socket" --no-createdb --no-inherit --no-superuser --no-createrole --no-replication --login
+
+        log "Loading fixtures under the ${superuserRole} role..."
+        psql -U "${superuserRole}" -v PGUSER="$PGUSER" -v ON_ERROR_STOP=1 -f "$_arg_fixtures" >> "$setuplog"
 
         log "Done. Running command..."
 

test/io/fixtures.sql

@@ -4,7 +4,7 @@
 set search_path to public;
 
 CREATE ROLE postgrest_test_anonymous;
-ALTER ROLE :USER SET pgrst.db_anon_role = 'postgrest_test_anonymous';
+ALTER ROLE :PGUSER SET pgrst.db_anon_role = 'postgrest_test_anonymous';
 
 CREATE ROLE postgrest_test_author;
 
@@ -14,7 +14,7 @@ alter role postgrest_test_serializable set default_transaction_isolation = 'seri
 CREATE ROLE postgrest_test_repeatable_read;
 alter role postgrest_test_repeatable_read set default_transaction_isolation = 'REPEATABLE READ';
 
-GRANT postgrest_test_anonymous, postgrest_test_author, postgrest_test_serializable, postgrest_test_repeatable_read TO :USER;
+GRANT postgrest_test_anonymous, postgrest_test_author, postgrest_test_serializable, postgrest_test_repeatable_read TO :PGUSER;
 
 CREATE SCHEMA v1;
 GRANT USAGE ON SCHEMA v1 TO postgrest_test_anonymous;

test/load/fixtures.sql

@@ -1,5 +1,5 @@
 CREATE ROLE postgrest_test_anonymous;
-GRANT postgrest_test_anonymous TO :USER;
+GRANT postgrest_test_anonymous TO :PGUSER;
 CREATE SCHEMA test;
 
 -- PUT+PATCH target needs one record and column to modify

test/spec/SpecHelper.hs

@@ -211,7 +211,7 @@ testObservabilityCfg = baseCfg { configServerTraceHeader = Just $ mk "X-Request-
 
 analyzeTable :: Text -> IO ()
 analyzeTable tableName =
-  void $ readProcess "psql" ["--set", "ON_ERROR_STOP=1", "-a", "-c", toS $ "ANALYZE test.\"" <> tableName <> "\""] []
+  void $ readProcess "psql" ["-U", "postgres", "--set", "ON_ERROR_STOP=1", "-a", "-c", toS $ "ANALYZE test.\"" <> tableName <> "\""] []
 
 rangeHdrs :: ByteRange -> [Header]
 rangeHdrs r = [rangeUnit, (hRange, renderByteRange r)]

test/spec/fixtures/roles.sql

@@ -1,7 +1,6 @@
-\set AUTHENTICATOR current_user
 DROP ROLE IF EXISTS postgrest_test_anonymous, postgrest_test_default_role, postgrest_test_author;
 CREATE ROLE postgrest_test_anonymous;
 CREATE ROLE postgrest_test_default_role;
 CREATE ROLE postgrest_test_author;
 
-GRANT postgrest_test_anonymous, postgrest_test_default_role, postgrest_test_author TO :USER;
+GRANT postgrest_test_anonymous, postgrest_test_default_role, postgrest_test_author TO :PGUSER;