With traverse_trees_and_blobs factored out of the main traverse function,
the next patch can introduce an in-order revision walking with ease.

The variable holding the base path is only used in the newly factored out
function `traverse_trees_and_blobs`, however we keep its scope to
`traverse_commit_list` to keep the number of invocations for memory
allocations and release to one per commit traversal.  Rename the variable
to `base_path` for clarity.

Signed-off-by: Stefan Beller <sbel...@google.com>
---
 list-objects.c | 48 +++++++++++++++++++++++++++++-------------------
 1 file changed, 29 insertions(+), 19 deletions(-)

diff --git a/list-objects.c b/list-objects.c
index b3931fa434..bf46f80dff 100644
--- a/list-objects.c
+++ b/list-objects.c
@@ -183,25 +183,13 @@ static void add_pending_tree(struct rev_info *revs, 
struct tree *tree)
        add_pending_object(revs, &tree->object, "");
 }
 
-void traverse_commit_list(struct rev_info *revs,
-                         show_commit_fn show_commit,
-                         show_object_fn show_object,
-                         void *data)
+static void traverse_trees_and_blobs(struct rev_info *revs,
+                                    struct strbuf *base_path,
+                                    show_object_fn show_object,
+                                    void *data)
 {
        int i;
-       struct commit *commit;
-       struct strbuf base;
 
-       strbuf_init(&base, PATH_MAX);
-       while ((commit = get_revision(revs)) != NULL) {
-               /*
-                * an uninteresting boundary commit may not have its tree
-                * parsed yet, but we are not going to show them anyway
-                */
-               if (commit->tree)
-                       add_pending_tree(revs, commit->tree);
-               show_commit(commit, data);
-       }
        for (i = 0; i < revs->pending.nr; i++) {
                struct object_array_entry *pending = revs->pending.objects + i;
                struct object *obj = pending->item;
@@ -218,17 +206,39 @@ void traverse_commit_list(struct rev_info *revs,
                        path = "";
                if (obj->type == OBJ_TREE) {
                        process_tree(revs, (struct tree *)obj, show_object,
-                                    &base, path, data);
+                                    base_path, path, data);
                        continue;
                }
                if (obj->type == OBJ_BLOB) {
                        process_blob(revs, (struct blob *)obj, show_object,
-                                    &base, path, data);
+                                    base_path, path, data);
                        continue;
                }
                die("unknown pending object %s (%s)",
                    oid_to_hex(&obj->oid), name);
        }
        object_array_clear(&revs->pending);
-       strbuf_release(&base);
+}
+
+void traverse_commit_list(struct rev_info *revs,
+                         show_commit_fn show_commit,
+                         show_object_fn show_object,
+                         void *data)
+{
+       struct commit *commit;
+       struct strbuf base_path;
+       strbuf_init(&base_path, PATH_MAX);
+
+       while ((commit = get_revision(revs)) != NULL) {
+               /*
+                * an uninteresting boundary commit may not have its tree
+                * parsed yet, but we are not going to show them anyway
+                */
+               if (commit->tree)
+                       add_pending_tree(revs, commit->tree);
+               show_commit(commit, data);
+       }
+       traverse_trees_and_blobs(revs, &base_path, show_object, data);
+
+       strbuf_release(&base_path);
 }
-- 
2.15.0.rc2.443.gfcc3b81c0a

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