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authorRamkumar Ramachandra <artagnon@gmail.com>2010-03-28 23:33:50 +0530
committerJunio C Hamano <gitster@pobox.com>2010-04-18 13:55:41 -0700
commit00b84e9dbfa6fabbac971dd70bc5a44802b0c36e (patch)
treeceb93f4c3c11e3d853b04756d11f5428a2dcd357
parent11766ca4a89ba960271e94281463d1b44654ca3b (diff)
downloadgit-00b84e9dbfa6fabbac971dd70bc5a44802b0c36e.tar.gz
git-00b84e9dbfa6fabbac971dd70bc5a44802b0c36e.tar.xz
Documentation/remote-helpers: Rewrite description
Rewrite the description section to describe what exactly remote helpers are and the need for them. Also mention the curl family of remote helpers as an example. [jc: with readability fixes from Jonathan squashed in] Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Reviewed-by: Jonathan Nieder <jrnieder@gmail.com> Acked-by: Sverre Rabbelier <srabbelier@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r--Documentation/git-remote-helpers.txt33
1 files changed, 27 insertions, 6 deletions
diff --git a/Documentation/git-remote-helpers.txt b/Documentation/git-remote-helpers.txt
index 1b5f61aa0..9d86c2679 100644
--- a/Documentation/git-remote-helpers.txt
+++ b/Documentation/git-remote-helpers.txt
@@ -3,7 +3,7 @@ git-remote-helpers(1)
NAME
----
-git-remote-helpers - Helper programs for interoperation with remote git
+git-remote-helpers - Helper programs to interact with remote repositories
SYNOPSIS
--------
@@ -12,11 +12,32 @@ SYNOPSIS
DESCRIPTION
-----------
-These programs are normally not used directly by end users, but are
-invoked by various git programs that interact with remote repositories
-when the repository they would operate on will be accessed using
-transport code not linked into the main git binary. Various particular
-helper programs will behave as documented here.
+Remote helper programs are normally not used directly by end users,
+but they are invoked by git when it needs to interact with remote
+repositories git does not support natively. A given helper will
+implement a subset of the capabilities documented here. When git
+needs to interact with a repository using a remote helper, it spawns
+the helper as an independent process, sends commands to the helper's
+standard input, and expects results from the helper's standard
+output. Because a remote helper runs as an independent process from
+git, there is no need to re-link git to add a new helper, nor any
+need to link the helper with the implementation of git.
+
+Every helper must support the "capabilities" command, which git will
+use to determine what other commands the helper will accept. Other
+commands generally concern facilities like discovering and updating
+remote refs, transporting objects between the object database and
+the remote repository, and updating the local object store.
+
+Helpers supporting the 'fetch' capability can discover refs from the
+remote repository and transfer objects reachable from those refs to
+the local object store. Helpers supporting the 'push' capability can
+transfer local objects to the remote repository and update remote refs.
+
+Git comes with a "curl" family of remote helpers, that handle various
+transport protocols, such as 'git-remote-http', 'git-remote-https',
+'git-remote-ftp' and 'git-remote-ftps'. They implement the capabilities
+'fetch', 'option', and 'push'.
COMMANDS
--------