Ignore psqlrc when loading the rubygems database dump

The SQL dump contains ownership instructions that can't be run if you
don't have the right users in your database clusters. When someone has a
psqlrc with ON_ERROR_STOP, this fails the load of the dump.

Use the opportunity to trigger an exception when psql returns a non-zero
exit code, rather than continue with an empty/inconsistent database.

swh/lister/rubygems/lister.py

@@ -119,9 +119,13 @@ class RubyGemsLister(StatelessLister[RubyGemsListerPage]):
                 dump_tar.extractall(temp_dir)
 
                 logger.debug("Populating rubygems database with dump %s", dump_id)
+
+                # FIXME: make this work with -v ON_ERROR_STOP=1
                 psql = subprocess.Popen(
-                    ["psql", "-q", db_url],
+                    ["psql", "--no-psqlrc", "-q", db_url],
                     stdin=subprocess.PIPE,
+                    stdout=subprocess.PIPE,
+                    stderr=subprocess.PIPE,
                 )
 
                 # passing value of gzip.open as stdin of subprocess.run makes the process
@@ -133,6 +137,18 @@ class RubyGemsLister(StatelessLister[RubyGemsListerPage]):
                 psql.stdin.close()  # type: ignore
                 psql.wait()
 
+                if psql.returncode != 0:
+                    assert psql.stdout
+                    for line in psql.stdout.readlines():
+                        logger.warning("psql out: %s", line.decode().strip())
+                    assert psql.stderr
+                    for line in psql.stderr.readlines():
+                        logger.warning("psql err: %s", line.decode().strip())
+                    raise ValueError(
+                        "Loading rubygems dump failed with exit code %s.",
+                        psql.returncode,
+                    )
+
     def get_pages(self) -> Iterator[RubyGemsListerPage]:
         # spawn a temporary postgres instance (require initdb executable in environment)
         with Postgresql() as postgresql: