X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=Documentation%2Fgit-get-tar-commit-id.txt;h=0eb5e2889c9e5bb12af82fbc42f59493720ab731;hb=96768e3108f76a20699b23f7a1218949144b2394;hp=f9c4140d3dbf1c23e2ac758ed6317d53fce9bb7c;hpb=58eaf287f1b25f6427b06bd72d8e555615828aeb;p=git.git

diff --git a/Documentation/git-get-tar-commit-id.txt b/Documentation/git-get-tar-commit-id.txt
index f9c4140d..0eb5e288 100644
--- a/Documentation/git-get-tar-commit-id.txt
+++ b/Documentation/git-get-tar-commit-id.txt
@@ -3,25 +3,24 @@ git-get-tar-commit-id(1)
 
 NAME
 ----
-git-get-tar-commit-id - Some git command not yet documented.
+git-get-tar-commit-id - Extract commit ID from an archive created using git-tar-tree.
 
 
 SYNOPSIS
 --------
-'git-get-tar-commit-id' [ --option ] <args>...
+'git-get-tar-commit-id' < <tarfile>
+
 
 DESCRIPTION
 -----------
-Does something not yet documented.
-
-
-OPTIONS
--------
---option::
-	Some option not yet documented.
-
-<args>...::
-	Some argument not yet documented.
+Acts as a filter, extracting the commit ID stored in archives created by
+git-tar-tree.  It reads only the first 1024 bytes of input, thus its
+runtime is not influenced by the size of <tarfile> very much.
+
+If no commit ID is found, git-get-tar-commit-id quietly exists with a
+return code of 1.  This can happen if <tarfile> had not been created
+using git-tar-tree or if the first parameter of git-tar-tree had been
+a tree ID instead of a commit ID or tag.
 
 
 Author