From cbb84e5d174cf33fd4dcf3136de50a886ff9a2e2 Mon Sep 17 00:00:00 2001 From: Jan Hudec Date: Sat, 12 May 2007 19:11:13 +0200 Subject: [PATCH] Updated documentation of hooks in git-receive-pack. Added documentation of pre-receive and post-receive hooks and updated documentation of update and post-update hooks. [jc: with minor copy-editing] Signed-off-by: Jan Hudec Signed-off-by: Junio C Hamano --- Documentation/hooks.txt | 77 +++++++++++++++++++++++++++++++++++++---- 1 file changed, 70 insertions(+), 7 deletions(-) diff --git a/Documentation/hooks.txt b/Documentation/hooks.txt index b083290d12..80ba6709ad 100644 --- a/Documentation/hooks.txt +++ b/Documentation/hooks.txt @@ -90,6 +90,35 @@ parameter, and is invoked after a commit is made. This hook is meant primarily for notification, and cannot affect the outcome of `git-commit`. +[[pre-receive]] +pre-receive +----------- + +This hook is invoked by `git-receive-pack` on the remote repository, +which happens when a `git push` is done on a local repository. +Just before starting to update refs on the remote repository, the +pre-receive hook is invoked. Its exit status determines the success +or failure of the update. + +This hook executes once for the receive operation. It takes no +arguments, but for each ref to be updated it receives on standard +input a line of the format: + + SP SP LF + +where `` is the old object name stored in the ref, +`` is the new object name to be stored in the ref and +`` is the full name of the ref. +When creating a new ref, `` is 40 `0`. + +If the hook exits with non-zero status, none of the refs will be +updated. If the hook exits with zero, updating of individual refs can +still be prevented by the <> hook. + +If you want to report something to the `git-send-pack` on the other end, +you can simply `echo` your messages. + +[[update]] update ------ @@ -108,7 +137,7 @@ three parameters: A zero exit from the update hook allows the ref to be updated. Exiting with a non-zero status prevents `git-receive-pack` -from updating the ref. +from updating that ref. This hook can be used to prevent 'forced' update on certain refs by making sure that the object name is a commit object that is a @@ -117,7 +146,8 @@ That is, to enforce a "fast forward only" policy. It could also be used to log the old..new status. However, it does not know the entire set of branches, so it would end up -firing one e-mail per ref when used naively, though. +firing one e-mail per ref when used naively, though. The +<> hook is more suited to that. Another use suggested on the mailing list is to use this hook to implement access control which is finer grained than the one @@ -127,9 +157,38 @@ The standard output of this hook is sent to `stderr`, so if you want to report something to the `git-send-pack` on the other end, you can simply `echo` your messages. -The default 'update' hook, when enabled, demonstrates how to -send out a notification e-mail. +The default 'update' hook, when enabled--and with +`hooks.allowunannotated` config option turned on--prevents +unannotated tags to be pushed. + +[[post-receive]] +post-receive +------------ +This hook is invoked by `git-receive-pack` on the remote repository, +which happens when a `git push` is done on a local repository. +It executes on the remote repository once after all the refs have +been updated. + +This hook executes once for the receive operation. It takes no +arguments, but gets the same information as the `pre-receive` +hook does on its standard input. + +This hook does not affect the outcome of `git-receive-pack`, as it +is called after the real work is done. + +This supersedes the [[post-update]] hook in that it actually get's +both old and new values of all the refs. + +If you want to report something to the `git-send-pack` on the +other end, you can simply `echo` your messages. + +The default 'post-receive' hook is empty, but there is +a sample script `post-receive-email` provided in the `contrib/hooks` +directory in git distribution, which implements sending commit +emails. + +[[post-update]] post-update ----------- @@ -148,12 +207,16 @@ The 'post-update' hook can tell what are the heads that were pushed, but it does not know what their original and updated values are, so it is a poor place to do log old..new. +In general, `post-receive` hook is preferred when the hook needs +to decide its acion on the status of the entire set of refs +being updated, as this hook is called once per ref, with +information only on a single ref at a time. + When enabled, the default 'post-update' hook runs `git-update-server-info` to keep the information used by dumb transports (e.g., HTTP) up-to-date. If you are publishing a git repository that is accessible via HTTP, you should probably enable this hook. -The standard output of this hook is sent to `/dev/null`; if you -want to report something to the `git-send-pack` on the other end, -you can redirect your output to your `stderr`. +Both standard output and standard error output are forwarded to +`git-send-pack` on the other end.