revision.h: introduce blob/tree walking in order of the commits

diff --git a/Documentation/git-filter-branch.txt b/Documentation/git-filter-branch.txt
index 9e5169aa64f4ffd5ea42f85b2dbe812086e9652c..3a52e4dce39eeaf6eba896ccbf9e0505cebb3ec9 100644 (file)
--- a/Documentation/git-filter-branch.txt
+++ b/Documentation/git-filter-branch.txt
@@ -8,13 +8,13 @@ git-filter-branch - Rewrite branches
 SYNOPSIS
 --------
 [verse]
-'git filter-branch' [--setup <command>] [--env-filter <command>]
-       [--tree-filter <command>] [--index-filter <command>]
-       [--parent-filter <command>] [--msg-filter <command>]
-       [--commit-filter <command>] [--tag-name-filter <command>]
-       [--subdirectory-filter <directory>] [--prune-empty]
+'git filter-branch' [--setup <command>] [--subdirectory-filter <directory>]
+       [--env-filter <command>] [--tree-filter <command>]
+       [--index-filter <command>] [--parent-filter <command>]
+       [--msg-filter <command>] [--commit-filter <command>]
+       [--tag-name-filter <command>] [--prune-empty]
        [--original <namespace>] [-d <directory>] [-f | --force]
-       [--] [<rev-list options>...]
+       [--state-branch <branch>] [--] [<rev-list options>...]
 
 DESCRIPTION
 -----------
@@ -89,6 +89,11 @@ OPTIONS
        can be used or modified in the following filter steps except
        the commit filter, for technical reasons.
 
+--subdirectory-filter <directory>::
+       Only look at the history which touches the given subdirectory.
+       The result will contain that directory (and only that) as its
+       project root. Implies <<Remap_to_ancestor>>.
+
 --env-filter <command>::
        This filter may be used if you only need to modify the environment
        in which the commit will be performed.  Specifically, you might
@@ -167,11 +172,6 @@ be removed, buyer beware. There is also no support for changing the
 author or timestamp (or the tag message for that matter). Tags which point
 to other tags will be rewritten to point to the underlying commit.
 
---subdirectory-filter <directory>::
-       Only look at the history which touches the given subdirectory.
-       The result will contain that directory (and only that) as its
-       project root. Implies <<Remap_to_ancestor>>.
-
 --prune-empty::
        Some filters will generate empty commits that leave the tree untouched.
        This option instructs git-filter-branch to remove such commits if they
@@ -198,6 +198,12 @@ to other tags will be rewritten to point to the underlying commit.
        directory or when there are already refs starting with
        'refs/original/', unless forced.
 
+--state-branch <branch>::
+       This option will cause the mapping from old to new objects to
+       be loaded from named branch upon startup and saved as a new
+       commit to that branch upon exit, enabling incremental of large
+       trees. If '<branch>' does not exist it will be created.
+
 <rev-list options>...::
        Arguments for 'git rev-list'.  All positive refs included by
        these options are rewritten.  You may also specify options