diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/Makefile | 2 | ||||
| -rw-r--r-- | Documentation/git-http-backend.txt | 8 | ||||
| -rw-r--r-- | Documentation/git-receive-pack.txt | 2 | ||||
| -rw-r--r-- | Documentation/git-upload-pack.txt | 4 | ||||
| -rw-r--r-- | Documentation/git.txt | 13 | ||||
| -rw-r--r-- | Documentation/gitnamespaces.txt | 75 |
6 files changed, 100 insertions, 4 deletions
diff --git a/Documentation/Makefile b/Documentation/Makefile index 36989b7f65..2004fbe630 100644 --- a/Documentation/Makefile +++ b/Documentation/Makefile @@ -6,7 +6,7 @@ MAN5_TXT=gitattributes.txt gitignore.txt gitmodules.txt githooks.txt \ gitrepository-layout.txt MAN7_TXT=gitcli.txt gittutorial.txt gittutorial-2.txt \ gitcvs-migration.txt gitcore-tutorial.txt gitglossary.txt \ - gitdiffcore.txt gitrevisions.txt gitworkflows.txt + gitdiffcore.txt gitnamespaces.txt gitrevisions.txt gitworkflows.txt MAN_TXT = $(MAN1_TXT) $(MAN5_TXT) $(MAN7_TXT) MAN_XML=$(patsubst %.txt,%.xml,$(MAN_TXT)) diff --git a/Documentation/git-http-backend.txt b/Documentation/git-http-backend.txt index 277d9e141b..f4e0741c11 100644 --- a/Documentation/git-http-backend.txt +++ b/Documentation/git-http-backend.txt @@ -119,6 +119,14 @@ ScriptAliasMatch \ ScriptAlias /git/ /var/www/cgi-bin/gitweb.cgi/ ---------------------------------------------------------------- ++ +To serve multiple repositories from different linkgit:gitnamespaces[7] in a +single repository: ++ +---------------------------------------------------------------- +SetEnvIf Request_URI "^/git/([^/]*)" GIT_NAMESPACE=$1 +ScriptAliasMatch ^/git/[^/]*(.*) /usr/libexec/git-core/git-http-backend/storage.git$1 +---------------------------------------------------------------- Accelerated static Apache 2.x:: Similar to the above, but Apache can be used to return static diff --git a/Documentation/git-receive-pack.txt b/Documentation/git-receive-pack.txt index f34e0ae1bd..3534ba01c4 100644 --- a/Documentation/git-receive-pack.txt +++ b/Documentation/git-receive-pack.txt @@ -149,7 +149,7 @@ if the repository is packed and is served via a dumb transport. SEE ALSO -------- -linkgit:git-send-pack[1] +linkgit:git-send-pack[1], linkgit:gitnamespaces[7] GIT --- diff --git a/Documentation/git-upload-pack.txt b/Documentation/git-upload-pack.txt index 4c0ca9ded2..61a9a04a8d 100644 --- a/Documentation/git-upload-pack.txt +++ b/Documentation/git-upload-pack.txt @@ -33,6 +33,10 @@ OPTIONS <directory>:: The repository to sync from. +SEE ALSO +-------- +linkgit:gitnamespaces[7] + GIT --- Part of the linkgit:git[1] suite diff --git a/Documentation/git.txt b/Documentation/git.txt index 19d4deff70..1fe4341791 100644 --- a/Documentation/git.txt +++ b/Documentation/git.txt @@ -10,8 +10,8 @@ SYNOPSIS -------- [verse] 'git' [--version] [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path] - [-p|--paginate|--no-pager] [--no-replace-objects] - [--bare] [--git-dir=<path>] [--work-tree=<path>] + [-p|--paginate|--no-pager] [--no-replace-objects] [--bare] + [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>] [-c <name>=<value>] [--help] <command> [<args>] @@ -323,6 +323,11 @@ help ...`. variable (see core.worktree in linkgit:git-config[1] for a more detailed discussion). +--namespace=<path>:: + Set the git namespace. See linkgit:gitnamespaces[7] for more + details. Equivalent to setting the `GIT_NAMESPACE` environment + variable. + --bare:: Treat the repository as a bare repository. If GIT_DIR environment is not set, it is set to the current working @@ -587,6 +592,10 @@ git so take care if using Cogito etc. This can also be controlled by the '--work-tree' command line option and the core.worktree configuration variable. +'GIT_NAMESPACE':: + Set the git namespace; see linkgit:gitnamespaces[7] for details. + The '--namespace' command-line option also sets this value. + 'GIT_CEILING_DIRECTORIES':: This should be a colon-separated list of absolute paths. If set, it is a list of directories that git should not chdir diff --git a/Documentation/gitnamespaces.txt b/Documentation/gitnamespaces.txt new file mode 100644 index 0000000000..ed8924e856 --- /dev/null +++ b/Documentation/gitnamespaces.txt @@ -0,0 +1,75 @@ +gitnamespaces(7) +================ + +NAME +---- +gitnamespaces - Git namespaces + +DESCRIPTION +----------- + +Git supports dividing the refs of a single repository into multiple +namespaces, each of which has its own branches, tags, and HEAD. Git can +expose each namespace as an independent repository to pull from and push +to, while sharing the object store, and exposing all the refs to +operations such as linkgit:git-gc[1]. + +Storing multiple repositories as namespaces of a single repository +avoids storing duplicate copies of the same objects, such as when +storing multiple branches of the same source. The alternates mechanism +provides similar support for avoiding duplicates, but alternates do not +prevent duplication between new objects added to the repositories +without ongoing maintenance, while namespaces do. + +To specify a namespace, set the `GIT_NAMESPACE` environment variable to +the namespace. For each ref namespace, git stores the corresponding +refs in a directory under `refs/namespaces/`. For example, +`GIT_NAMESPACE=foo` will store refs under `refs/namespaces/foo/`. You +can also specify namespaces via the `--namespace` option to +linkgit:git[1]. + +Note that namespaces which include a `/` will expand to a hierarchy of +namespaces; for example, `GIT_NAMESPACE=foo/bar` will store refs under +`refs/namespaces/foo/refs/namespaces/bar/`. This makes paths in +`GIT_NAMESPACE` behave hierarchically, so that cloning with +`GIT_NAMESPACE=foo/bar` produces the same result as cloning with +`GIT_NAMESPACE=foo` and cloning from that repo with `GIT_NAMESPACE=bar`. It +also avoids ambiguity with strange namespace paths such as `foo/refs/heads/`, +which could otherwise generate directory/file conflicts within the `refs` +directory. + +linkgit:git-upload-pack[1] and linkgit:git-receive-pack[1] rewrite the +names of refs as specified by `GIT_NAMESPACE`. git-upload-pack and +git-receive-pack will ignore all references outside the specified +namespace. + +The smart HTTP server, linkgit:git-http-backend[1], will pass +GIT_NAMESPACE through to the backend programs; see +linkgit:git-http-backend[1] for sample configuration to expose +repository namespaces as repositories. + +For a simple local test, you can use linkgit:git-remote-ext[1]: + +---------- +git clone ext::'git --namespace=foo %s /tmp/prefixed.git' +---------- + +SECURITY +-------- + +Anyone with access to any namespace within a repository can potentially +access objects from any other namespace stored in the same repository. +You can't directly say "give me object ABCD" if you don't have a ref to +it, but you can do some other sneaky things like: + +. Claiming to push ABCD, at which point the server will optimize out the + need for you to actually send it. Now you have a ref to ABCD and can + fetch it (claiming not to have it, of course). + +. Requesting other refs, claiming that you have ABCD, at which point the + server may generate deltas against ABCD. + +None of this causes a problem if you only host public repositories, or +if everyone who may read one namespace may also read everything in every +other namespace (for instance, if everyone in an organization has read +permission to every repository). |