Merge branch 'js/run-command-close-packs'

The run-command API has been updated so that the callers can easily
ask the file descriptors open for packfiles to be closed immediately
before spawning commands that may trigger auto-gc.

* js/run-command-close-packs:
  Close object store closer to spawning child processes
  run_auto_maintenance(): implicitly close the object store
  run-command: offer to close the object store before running
  run-command: prettify the `RUN_COMMAND_*` flags
  pull: release packs before fetching
  commit-graph: when closing the graph, also release the slab

builtin/pull.c

@@ -26,6 +26,7 @@
 #include "wt-status.h"
 #include "commit-reach.h"
 #include "sequencer.h"
+#include "packfile.h"
 
 /**
  * Parses the value of --rebase. If value is a false value, returns
@@ -577,7 +578,7 @@ static int run_fetch(const char *repo, const char **refspecs)
 		strvec_pushv(&args, refspecs);
 	} else if (*refspecs)
 		BUG("refspecs without repo?");
-	ret = run_command_v_opt(args.v, RUN_GIT_CMD);
+	ret = run_command_v_opt(args.v, RUN_GIT_CMD | RUN_CLOSE_OBJECT_STORE);
 	strvec_clear(&args);
 	return ret;
 }