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authorLibravatar Jeff King <peff@peff.net>2018-05-28 05:39:23 -0400
committerLibravatar Junio C Hamano <gitster@pobox.com>2018-05-29 00:28:22 +0900
commitfb3010c31fdaa00ae91152431c3da7e300daf848 (patch)
treeb0d8269767b8d4634b6066968886e7c696efcbc4
parentmake show-index a builtin (diff)
downloadtgif-fb3010c31fdaa00ae91152431c3da7e300daf848.tar.xz
show-index: update documentation for index v2
Commit 32637cdf4a (show-index.c: learn about index v2, 2007-04-09) changed the output format of show-index to include the object CRC32 but didn't update the documentation. Let's fix that and generally describe the output in more detail. There are a few other fixes here while we're rewording: - refer to index-pack along with pack-objects, since either can create .idx files - use "linkgit:" for referring to other commands - expand the bit about verify-pack, giving reasons why you might want this command instead. I almost omitted this entirely, but referring to verify-pack might help a reader who is looking for more information. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r--Documentation/git-show-index.txt26
1 files changed, 20 insertions, 6 deletions
diff --git a/Documentation/git-show-index.txt b/Documentation/git-show-index.txt
index a8a9509e0e..424e4ba84c 100644
--- a/Documentation/git-show-index.txt
+++ b/Documentation/git-show-index.txt
@@ -14,13 +14,27 @@ SYNOPSIS
DESCRIPTION
-----------
-Read the idx file for a Git packfile created with
-'git pack-objects' command from the standard input, and
-dump its contents.
+Read the `.idx` file for a Git packfile (created with
+linkgit:git-pack-objects[1] or linkgit:git-index-pack[1]) from the
+standard input, and dump its contents. The output consists of one object
+per line, with each line containing two or three space-separated
+columns:
-The information it outputs is subset of what you can get from
-'git verify-pack -v'; this command only shows the packfile
-offset and SHA-1 of each object.
+ - the first column is the offset in bytes of the object within the
+ corresponding packfile
+
+ - the second column is the object id of the object
+
+ - if the index version is 2 or higher, the third column contains the
+ CRC32 of the object data
+
+The objects are output in the order in which they are found in the index
+file, which should be (in a correctly constructed file) sorted by object
+id.
+
+Note that you can get more information on a packfile by calling
+linkgit:git-verify-pack[1]. However, as this command considers only the
+index file itself, it's both faster and more flexible.
GIT
---