for-each-ref: document `creatordate` and `creator` fields
These were introduced back in 2006 at 3175aa1ec28c but
never documented.
Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/Documentation/git-for-each-ref.txt b/Documentation/git-for-each-ref.txt
index 4240875..338a6ef 100644
--- a/Documentation/git-for-each-ref.txt
+++ b/Documentation/git-for-each-ref.txt
@@ -109,6 +109,11 @@
field names (`tree`, `parent`, `object`, `type`, and `tag`) can
be used to specify the value in the header field.
+For commit and tag objects, the special `creatordate` and `creator`
+fields will correspond to the appropriate date or name-email-date tuple
+from the `committer` or `tagger` fields depending on the object type.
+These are intended for working on a mix of annotated and lightweight tags.
+
Fields that have name-email-date tuple as its value (`author`,
`committer`, and `tagger`) can be suffixed with `name`, `email`,
and `date` to extract the named component.
@@ -119,8 +124,8 @@
line is 'contents:body', where body is all of the lines after the first
blank line. Finally, the optional GPG signature is `contents:signature`.
-For sorting purposes, fields with numeric values sort in numeric
-order (`objectsize`, `authordate`, `committerdate`, `taggerdate`).
+For sorting purposes, fields with numeric values sort in numeric order
+(`objectsize`, `authordate`, `committerdate`, `creatordate`, `taggerdate`).
All other fields are used to sort in their byte-value order.
In any case, a field name that refers to a field inapplicable to
