The operations a helper supports are declared to git in the response
to the `capabilities` command (see COMMANDS, below).
-'option'::
- For specifying settings like `verbosity` (how much output to
- write to stderr) and `depth` (how much history is wanted in the
- case of a shallow clone) that affect how other commands are
- carried out.
-
-'connect'::
- For fetching and pushing using git's native packfile protocol
- that requires a bidirectional, full-duplex connection.
-
-'push'::
- For listing remote refs and pushing specified objects from the
- local object store to remote refs.
-
-'fetch'::
- For listing remote refs and fetching the associated history to
- the local object store.
-
-'export'::
- For listing remote refs and pushing specified objects from a
- fast-import stream to remote refs.
-
-'import'::
- For listing remote refs and fetching the associated history as
- a fast-import stream.
-
-'refspec' <refspec>::
- This modifies the 'import' capability, allowing the produced
- fast-import stream to modify refs in a private namespace
- instead of writing to refs/heads or refs/remotes directly.
- It is recommended that all importers providing the 'import'
- capability use this.
-+
-A helper advertising the capability
-`refspec refs/heads/*:refs/svn/origin/branches/*`
-is saying that, when it is asked to `import refs/heads/topic`, the
-stream it outputs will update the `refs/svn/origin/branches/topic`
-ref.
-+
-This capability can be advertised multiple times. The first
-applicable refspec takes precedence. The left-hand of refspecs
-advertised with this capability must cover all refs reported by
-the list command. If no 'refspec' capability is advertised,
-there is an implied `refspec *:*`.
-
-'bidi-import'::
- The fast-import commands 'cat-blob' and 'ls' can be used by remote-helpers
- to retrieve information about blobs and trees that already exist in
- fast-import's memory. This requires a channel from fast-import to the
- remote-helper.
- If it is advertised in addition to "import", git establishes a pipe from
- fast-import to the remote-helper's stdin.
- It follows that git and fast-import are both connected to the
- remote-helper's stdin. Because git can send multiple commands to
- the remote-helper it is required that helpers that use 'bidi-import'
- buffer all 'import' commands of a batch before sending data to fast-import.
- This is to prevent mixing commands and fast-import responses on the
- helper's stdin.
-
-'export-marks' <file>::
- This modifies the 'export' capability, instructing git to dump the
- internal marks table to <file> when complete. For details,
- read up on '--export-marks=<file>' in linkgit:git-fast-export[1].
-
-'import-marks' <file>::
- This modifies the 'export' capability, instructing git to load the
- marks specified in <file> before processing any input. For details,
- read up on '--import-marks=<file>' in linkgit:git-fast-export[1].
+In the following, we list all defined capabilities and for
+each we list which commands a helper with that capability
+must provide.
Capabilities for Pushing
-~~~~~~~~~~~~~~~~~~~~~~~~
+^^^^^^^^^^^^^^^^^^^^^^^^
'connect'::
Can attempt to connect to 'git receive-pack' (for pushing),
- 'git upload-pack', etc for communication using the
- packfile protocol.
+ 'git upload-pack', etc for communication using
+ git's native packfile protocol. This
+ requires a bidirectional, full-duplex connection.
+
Supported commands: 'connect'.
Capabilities for Fetching
-~~~~~~~~~~~~~~~~~~~~~~~~~
+^^^^^^^^^^^^^^^^^^^^^^^^^
'connect'::
Can try to connect to 'git upload-pack' (for fetching),
'git receive-pack', etc for communication using the
- packfile protocol.
+ git's native packfile protocol. This
+ requires a bidirectional, full-duplex connection.
+
Supported commands: 'connect'.
When choosing between 'fetch' and 'import', git prefers 'fetch'.
Other frontends may have some other order of preference.
+Miscellaneous capabilities
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+'option'::
+ For specifying settings like `verbosity` (how much output to
+ write to stderr) and `depth` (how much history is wanted in the
+ case of a shallow clone) that affect how other commands are
+ carried out.
+
'refspec' <refspec>::
- This modifies the 'import' capability.
+ This modifies the 'import' capability, allowing the produced
+ fast-import stream to modify refs in a private namespace
+ instead of writing to refs/heads or refs/remotes directly.
+ It is recommended that all importers providing the 'import'
+ capability use this.
+
-A helper advertising
+A helper advertising the capability
`refspec refs/heads/*:refs/svn/origin/branches/*`
-in its capabilities is saying that, when it handles
-`import refs/heads/topic`, the stream it outputs will update the
-`refs/svn/origin/branches/topic` ref.
+is saying that, when it is asked to `import refs/heads/topic`, the
+stream it outputs will update the `refs/svn/origin/branches/topic`
+ref.
+
This capability can be advertised multiple times. The first
applicable refspec takes precedence. The left-hand of refspecs
the list command. If no 'refspec' capability is advertised,
there is an implied `refspec *:*`.
+'bidi-import'::
+ This modifies the 'import' capability.
+ The fast-import commands 'cat-blob' and 'ls' can be used by remote-helpers
+ to retrieve information about blobs and trees that already exist in
+ fast-import's memory. This requires a channel from fast-import to the
+ remote-helper.
+ If it is advertised in addition to "import", git establishes a pipe from
+ fast-import to the remote-helper's stdin.
+ It follows that git and fast-import are both connected to the
+ remote-helper's stdin. Because git can send multiple commands to
+ the remote-helper it is required that helpers that use 'bidi-import'
+ buffer all 'import' commands of a batch before sending data to fast-import.
+ This is to prevent mixing commands and fast-import responses on the
+ helper's stdin.
+
+'export-marks' <file>::
+ This modifies the 'export' capability, instructing git to dump the
+ internal marks table to <file> when complete. For details,
+ read up on '--export-marks=<file>' in linkgit:git-fast-export[1].
+
+'import-marks' <file>::
+ This modifies the 'export' capability, instructing git to load the
+ marks specified in <file> before processing any input. For details,
+ read up on '--import-marks=<file>' in linkgit:git-fast-export[1].
+
+
+
+
COMMANDS
--------
which marks them mandatory for git versions using the remote
helper to understand. Any unknown mandatory capability is a
fatal error.
++
+Support for this command is mandatory.
'list'::
Lists the refs, one per line, in the format "<value> <name>
the name; unrecognized attributes are ignored. The list ends
with a blank line.
+
-If 'push' is supported this may be called as 'list for-push'
-to obtain the current refs prior to sending one or more 'push'
-commands to the helper.
+See REF LIST ATTRIBUTES for a list of currently defined attributes.
++
+Supported if the helper has the "fetch" or "import" capability.
+
+'list for-push'::
+ Similar to 'list', except that it is used if and only if
+ the caller wants to the resulting ref list to prepare
+ push commands.
+ A helper supporting both push and fetch can use this
+ to distinguish for which operation the output of 'list'
+ is going to be used, possibly reducing the amount
+ of work that needs to be performed.
++
+Supported if the helper has the "push" or "export" capability.
'option' <name> <value>::
Sets the transport helper option <name> to <value>. Outputs a
for it). Options should be set before other commands,
and may influence the behavior of those commands.
+
+See OPTIONS for a list of currently defined options.
++
Supported if the helper has the "option" capability.
'fetch' <sha1> <name>::
per line, terminated with a blank line.
Outputs a single blank line when all fetch commands in the
same batch are complete. Only objects which were reported
- in the ref list with a sha1 may be fetched this way.
+ in the output of 'list' with a sha1 may be fetched this way.
+
Optionally may output a 'lock <file>' line indicating a file under
GIT_DIR/objects/pack which is keeping a pack until refs can be
to prevent mixing of commands and fast-import responses on the helper's
stdin.
+
-Supported if the helper has the 'import' capability.
+Supported if the helper has the "import" capability.
'export'::
Instructs the remote helper that any subsequent input is
local objects. This can be used to implement for incremental
operations.
+
-Supported if the helper has the 'export' capability.
+Supported if the helper has the "export" capability.
'connect' <service>::
Connects to given service. Standard input and standard output
REF LIST ATTRIBUTES
-------------------
-'for-push'::
- The caller wants to use the ref list to prepare push
- commands. A helper might chose to acquire the ref list by
- opening a different type of connection to the destination.
+The 'list' command produces a list of refs in which each ref
+may be followed by a list of attributes. The following ref list
+attributes are defined.
'unchanged'::
This ref is unchanged since the last import or fetch, although
OPTIONS
-------
+
+The following options are defined and (under suitable circumstances)
+set by git if the remote helper has the 'option' capability.
+
'option verbosity' <n>::
Changes the verbosity of messages displayed by the helper.
A value of 0 for <n> means that processes operate