graph: add commit graph design document

diff --git a/Documentation/gitmodules.txt b/Documentation/gitmodules.txt
index 8f7c50f330f36f625951db7f4cc4657a31fa7113..db5d47eb19b8f2aa21c11a9d3eedf40b9d71e84e 100644 (file)
--- a/Documentation/gitmodules.txt
+++ b/Documentation/gitmodules.txt
@@ -66,17 +66,26 @@ submodule.<name>.fetchRecurseSubmodules::
 
 submodule.<name>.ignore::
        Defines under what circumstances "git status" and the diff family show
-       a submodule as modified. When set to "all", it will never be considered
-       modified (but will nonetheless show up in the output of status and
-       commit when it has been staged), "dirty" will ignore all changes
-       to the submodules work tree and
-       takes only differences between the HEAD of the submodule and the commit
-       recorded in the superproject into account. "untracked" will additionally
-       let submodules with modified tracked files in their work tree show up.
-       Using "none" (the default when this option is not set) also shows
-       submodules that have untracked files in their work tree as changed.
-       If this option is also present in the submodules entry in .git/config of
-       the superproject, the setting there will override the one found in
+       a submodule as modified. The following values are supported:
+
+       all;; The submodule will never be considered modified (but will
+           nonetheless show up in the output of status and commit when it has
+           been staged).
+
+       dirty;; All changes to the submodule's work tree will be ignored, only
+           committed differences between the HEAD of the submodule and its
+           recorded state in the superproject are taken into account.
+
+       untracked;; Only untracked files in submodules will be ignored.
+           Committed differences and modifications to tracked files will show
+           up.
+
+       none;; No modifiations to submodules are ignored, all of committed
+           differences, and modifications to tracked and untracked files are
+           shown. This is the default option.
+
+       If this option is also present in the submodules entry in .git/config
+       of the superproject, the setting there will override the one found in
        .gitmodules.
        Both settings can be overridden on the command line by using the
        "--ignore-submodule" option. The 'git submodule' commands are not
@@ -84,8 +93,8 @@ submodule.<name>.ignore::
 
 submodule.<name>.shallow::
        When set to true, a clone of this submodule will be performed as a
-       shallow clone unless the user explicitly asks for a non-shallow
-       clone.
+       shallow clone (with a history depth of 1) unless the user explicitly
+       asks for a non-shallow clone.
 
 
 EXAMPLES