Merge branch 'jk/for-each-object-iteration'

The API to iterate over all objects learned to optionally list
objects in the order they appear in packfiles, which helps locality
of access if the caller accesses these objects while as objects are
enumerated.

* jk/for-each-object-iteration:
  for_each_*_object: move declarations to object-store.h
  cat-file: use a single strbuf for all output
  cat-file: split batch "buf" into two variables
  cat-file: use oidset check-and-insert
  cat-file: support "unordered" output for --batch-all-objects
  cat-file: rename batch_{loose,packed}_object callbacks
  t1006: test cat-file --batch-all-objects with duplicates
  for_each_packed_object: support iterating in pack-order
  for_each_*_object: give more comprehensive docstrings
  for_each_*_object: take flag arguments as enum
  for_each_*_object: store flag definitions in a single location

1 files changed, 10 insertions, 0 deletions

diff --git a/Documentation/git-cat-file.txt b/Documentation/git-cat-file.txt
index f90f09b03f..74013335a1 100644
--- a/Documentation/git-cat-file.txt
+++ b/Documentation/git-cat-file.txt
@@ -104,6 +104,16 @@ OPTIONS
 	buffering; this is much more efficient when invoking
 	`--batch-check` on a large number of objects.
 
+--unordered::
+	When `--batch-all-objects` is in use, visit objects in an
+	order which may be more efficient for accessing the object
+	contents than hash order. The exact details of the order are
+	unspecified, but if you do not require a specific order, this
+	should generally result in faster output, especially with
+	`--batch`.  Note that `cat-file` will still show each object
+	only once, even if it is stored multiple times in the
+	repository.
+
 --allow-unknown-type::
 	Allow -s or -t to query broken/corrupt objects of unknown type.