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| author | Stephen Boyd <bebarino@gmail.com> | 2010-02-18 01:10:28 -0800 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2010-02-18 17:13:18 -0800 |
| commit | 738820a913d05427b6c86d227aafd2bac7cd38d1 (patch) | |
| tree | 718179c8b15a91d859174d63f4a8d236963da082 /Documentation/git-pack-objects.txt | |
| parent | cc1b8d8bc6e453b96798574d67ce9590eb3e82e1 (diff) | |
| download | git-738820a913d05427b6c86d227aafd2bac7cd38d1.tar.gz | |
Documentation: describe --thin more accurately
The description for --thin was misleading and downright wrong. Correct
it with some inspiration from the description of index-pack's --fix-thin
and some background information from Nicolas Pitre <nico@fluxnic.net>.
Signed-off-by: Stephen Boyd <bebarino@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'Documentation/git-pack-objects.txt')
| -rw-r--r-- | Documentation/git-pack-objects.txt | 37 |
1 files changed, 24 insertions, 13 deletions
diff --git a/Documentation/git-pack-objects.txt b/Documentation/git-pack-objects.txt index 61fd7d0998..034caedc39 100644 --- a/Documentation/git-pack-objects.txt +++ b/Documentation/git-pack-objects.txt @@ -21,16 +21,21 @@ DESCRIPTION Reads list of objects from the standard input, and writes a packed archive with specified base-name, or to the standard output. -A packed archive is an efficient way to transfer set of objects -between two repositories, and also is an archival format which -is efficient to access. The packed archive format (.pack) is -designed to be self contained so that it can be unpacked without -any further information, but for fast, random access to the objects -in the pack, a pack index file (.idx) will be generated. - -Placing both in the pack/ subdirectory of $GIT_OBJECT_DIRECTORY (or +A packed archive is an efficient way to transfer a set of objects +between two repositories as well as an access efficient archival +format. In a packed archive, an object is either stored as a +compressed whole or as a difference from some other object. +The latter is often called a delta. + +The packed archive format (.pack) is designed to be self-contained +so that it can be unpacked without any further information. Therefore, +each object that a delta depends upon must be present within the pack. + +A pack index file (.idx) is generated for fast, random access to the +objects in the pack. Placing both the index file (.idx) and the packed +archive (.pack) in the pack/ subdirectory of $GIT_OBJECT_DIRECTORY (or any of the directories on $GIT_ALTERNATE_OBJECT_DIRECTORIES) -enables git to read from such an archive. +enables git to read from the pack archive. The 'git unpack-objects' command can read the packed archive and expand the objects contained in the pack into "one-file @@ -38,10 +43,6 @@ one-object" format; this is typically done by the smart-pull commands when a pack is created on-the-fly for efficient network transport by their peers. -In a packed archive, an object is either stored as a compressed -whole, or as a difference from some other object. The latter is -often called a delta. - OPTIONS ------- @@ -179,6 +180,16 @@ base-name:: Add --no-reuse-object if you want to force a uniform compression level on all data no matter the source. +--thin:: + Create a "thin" pack by omitting the common objects between a + sender and a receiver in order to reduce network transfer. This + option only makes sense in conjunction with --stdout. ++ +Note: A thin pack violates the packed archive format by omitting +required objects and is thus unusable by git without making it +self-contained. Use `git index-pack --fix-thin` +(see linkgit:git-index-pack[1]) to restore the self-contained property. + --delta-base-offset:: A packed archive can express base object of a delta as either 20-byte object name or as an offset in the |