difftool: display the number of files in the diff queue in the prompt

diff --git a/Documentation/git.txt b/Documentation/git.txt
index b73a24a3c78c72c8cb6e75b0e14a45cb0e0b42e9..25b9002be32ae02bbe89ac3de924278dd01ae233 100644 (file)
--- a/Documentation/git.txt
+++ b/Documentation/git.txt
@@ -804,6 +804,15 @@ temporary file --- it is removed when 'GIT_EXTERNAL_DIFF' exits.
 +
 For a path that is unmerged, 'GIT_EXTERNAL_DIFF' is called with 1
 parameter, <path>.
++
+For each path 'GIT_EXTERNAL_DIFF' is called, two environment variables,
+'GIT_DIFF_PATH_COUNTER' and 'GIT_DIFF_PATH_TOTAL' are set.
+
+'GIT_DIFF_PATH_COUNTER'::
+       A 1-based counter incremented by one for every path.
+
+'GIT_DIFF_PATH_TOTAL'::
+       The total number of paths.
 
 other
 ~~~~~