1git repository layout 2===================== 3 4You may find these things in your git repository (`.git` 5directory for a repository associated with your working tree, or 6`'project'.git` directory for a public 'bare' repository). 7 8objects:: 9 Object store associated with this repository. Usually 10 an object store is self sufficient (i.e. all the objects 11 that are referred to by an object found in it are also 12 found in it), but there are couple of ways to violate 13 it. 14+ 15. You could populate the repository by running a commit walker 16without `-a` option. Depending on which options are given, you 17could have only commit objects without associated blobs and 18trees this way, for example. A repository with this kind of 19incomplete object store is not suitable to be published to the 20outside world but sometimes useful for private repository. 21. You can be using `objects/info/alternates` mechanism, or 22`$GIT_ALTERNATE_OBJECT_DIRECTORIES` mechanism to 'borrow' 23objects from other object stores. A repository with this kind 24of incomplete object store is not suitable to be published for 25use with dumb transports but otherwise is OK as long as 26`objects/info/alternates` points at the right object stores 27it borrows from. 28 29objects/[0-9a-f][0-9a-f]:: 30 Traditionally, each object is stored in its own file. 31 They are split into 256 subdirectories using the first 32 two letters from its object name to keep the number of 33 directory entries `objects` directory itself needs to 34 hold. Objects found here are often called 'unpacked' 35 objects. 36 37objects/pack:: 38 Packs (files that store many object in compressed form, 39 along with index files to allow them to be randomly 40 accessed) are found in this directory. 41 42objects/info:: 43 Additional information about the object store is 44 recorded in this directory. 45 46objects/info/packs:: 47 This file is to help dumb transports discover what packs 48 are available in this object store. Whenever a pack is 49 added or removed, `git update-server-info` should be run 50 to keep this file up-to-date if the repository is 51 published for dumb transports. `git repack` does this 52 by default. 53 54objects/info/alternates:: 55 This file records absolute filesystem paths of alternate 56 object stores that this object store borrows objects 57 from, one pathname per line. 58 59refs:: 60 References are stored in subdirectories of this 61 directory. The `git prune` command knows to keep 62 objects reachable from refs found in this directory and 63 its subdirectories. 64 65refs/heads/`name`:: 66 records tip-of-the-tree commit objects of branch `name` 67 68refs/tags/`name`:: 69 records any object name (not necessarily a commit 70 object, or a tag object that points at a commit object). 71 72HEAD:: 73 A symlink of the form `refs/heads/'name'` to point at 74 the current branch, if exists. It does not mean much if 75 the repository is not associated with any working tree 76 (i.e. a 'bare' repository), but a valid git repository 77 *must* have such a symlink here. It is legal if the 78 named branch 'name' does not (yet) exist. 79 80branches:: 81 A slightly deprecated way to store shorthands to be used 82 to specify URL to `git fetch`, `git pull` and `git push` 83 commands is to store a file in `branches/'name'` and 84 give 'name' to these commands in place of 'repository' 85 argument. 86 87hooks:: 88 Hooks are customization scripts used by various git 89 commands. A handful of sample hooks are installed when 90 `git init-db` is run, but all of them are disabled by 91 default. To enable, they need to be made executable. 92 93index:: 94 The current index file for the repository. It is 95 usually not found in a bare repository. 96 97info:: 98 Additional information about the repository is recorded 99 in this directory. 100 101info/refs:: 102 This file is to help dumb transports to discover what 103 refs are available in this repository. Whenever you 104 create/delete a new branch or a new tag, `git 105 update-server-info` should be run to keep this file 106 up-to-date if the repository is published for dumb 107 transports. The `git-receive-pack` command, which is 108 run on a remote repository when you `git push` into it, 109 runs `hooks/update` hook to help you achieve this. 110 111info/grafts:: 112 This file records fake commit ancestry information, to 113 pretend the set of parents a commit has is different 114 from how the commit was actually created. One record 115 per line describes a commit and its fake parents by 116 listing their 40-byte hexadecimal object names separated 117 by a space and terminated by a newline. 118 119info/exclude:: 120 This file, by convention among Porcelains, stores the 121 exclude pattern list. `git status` looks at it, but 122 otherwise it is not looked at by any of the core git 123 commands. 124 125remotes:: 126 Stores shorthands to be used to give URL and default 127 refnames to interact with remote repository to `git 128 fetch`, `git pull` and `git push` commands.